JPH01107636A - Cooling device for variable speed induction motor - Google Patents

Abstract

PURPOSE:To cool a resistance material and dissipate its heat effectively by forming, in a ventilation barrel, a space part defined between plural stators and between plural rotor cores, and by a machine frame provided with said plural stators inside, and by causing a blowing apparatus to communicate with a blower port or exhaust part opened in said machine frame. CONSTITUTION:A space part 66 defined between rotor cores 2, 3, and by a turning stator 31 fitted to a sliding bearing 26, by a stator 25 fixed at a ventilation fixing ring 27A and a stator ring 27B, and by a machine frame 14 is formed in a ventilation barrel 67. A plurality of openings are opened in said machine frame 14 to communicate with said ventilation barrel 67, and said plural openings are formed as each arbitrary number of blower port 68 and exhaust port 69. A blowing apparatus 73 is immovably provided in the machine frame 14, and the air intake part 74A of said blowing apparatus 73 is connected with an exhaust port 69 to communicate with the ventilation barrel 67.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an electric motor that can change the speed control range over a wide range from low speed Lα to high speed. In the body, multiple conductors installed on each of multiple rotors are short-circuited via a resistive material, and the non-magnetic material or resistive material is ventilated to cool and dissipate heat, thereby increasing electric rotation efficiency. The present invention relates to a cooling device for improving the durability of non-magnetic materials or resistive materials.

[Prior art and its problems]

Conventionally, when starting a squirrel cage induction motor that is commonly used, star-delta starting, reactor starting, starting compensator starting, etc. are known as means for suppressing the starting current. However, the rotation speed can only be suppressed in stages, and the starting current cannot be controlled by appropriately changing the suppression value set in the starting device.

In addition, in wire-wound motors, it is possible to perform stepless control from the time of starting to the desired rotation speed by changing the resistance value of the secondary resistor. There are problems such as the configuration is one high and the control operation is troublesome, so it cannot be used in a squirrel cage induction electric @1 machine.

To deal with the above 1/11 problem, for example, JP-A-49-86807 proposes an asynchronous electric motor having a stator with polyphase windings and a squirrel-cage rotor. The stator consists of a first and a second winding section, which are coaxial with each other and adjacent to different parts of the rotor. an asynchronous electric motor which is arranged in the same manner and can be supplied with an alternating current of the same frequency and is provided with means for varying the electromotive force induced in the windings of the rotor by means of a second winding section, Although it is possible to change the rotational speed by creating a phase difference between the two stator sections by mechanical or electrical means, it is possible to change the rotation speed by creating a phase difference between the two stator sections, but it is possible to change the rotation speed by creating a phase difference between the two stator sections. It is completely unusable as a power source that frequently starts and stops when a load is connected. This left unresolved problems that could not be adopted.

Furthermore, the technology disclosed in Japanese Unexamined Patent Publication No. 54-19005 has two dark blue stators each having independent stator windings facing two sets of rotor cores installed on the same axis. and a squirrel-cage conductor that is commonly installed across the two sets of rotor cores and short-circuited at both ends via short-circuit rings, and a squirrel-cage conductor that is connected between the two silk rotor cores. A high-resistance element is provided at the center of the conductor to short-circuit the squirrel-cage conductors by 1", and independent windings are provided on the stator facing the rotor core. At startup, the stator windings are connected to each other. This is a twin iron squirrel cage electric motor that shifts the phase between the stator windings by 180 degrees and supplies power by matching the phases during operation after startup. The characteristic is that the starting characteristics are improved by increasing the torque by 1 herk, and during operation, the stator windings are aligned in phase with each other so that the motor can be operated with normal torque characteristics.Therefore, it has the effect of improving starting characteristics. Even if it is recognized,
Since this electric motor is a variable speed electric motor, it cannot be used to power a load that requires variable speed.

In more detail, referring to the technique disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 54-29005), the stator is instantaneously moved during the transition from startup to operation for the purpose of alleviating the shock caused by violent fluctuations in torque. One example is to provide an intermediate step where the power supply circuits of the lines are connected in series, but in this case, the phase shift of the rotating magnetic field is limited to only the 0° and 180° points, and it is not suitable for speed change purposes. It doesn't belong to. Moreover, by switching to series, the voltage applied to the stator is halved, so the 1 to 1 torque is reduced to 1/4, and this also makes shifting 1IIIJIj completely impossible, as disclosed in this publication. This is clear from the fact that the gist does not refer to gear shifting as a ten-dimensional process, and although it is said to be an "intermediate step in which the stator windings are switched between series connection and parallel connection with respect to the power supply circuit," this series connection is not intended for gear shifting purposes. It is nothing more than a completely useless connection, it cannot be controlled to any speed, and it is connected to the central short-circuit ring of a high-resistance element. ! iI'
If the starting load is increased and the starting load is increased, the starting ability may be insufficient and the high-resistance element may be damaged due to inability to start. The defect in which heat generation could not be prevented was left unresolved.

Then, in Japanese Patent Publication No. 27-4357, the stator is divided into two sets, a fixed stator and a movable stator, each with the same winding and connected to the same power source, and the rotor is also divided into 2F41 and the rotor conductor is divided into two sets, a fixed stator and a movable stator. The two conductors were made into separate conductors with a wide center section, and both ends were connected with end short-circuit rings, cooling ventilation holes were provided in the rectangular frame, and the center sections of the two conductors were separated.
A configuration that increases the effect is disclosed, but this technique 1 (1
In this case, the windings of both stators are not connected in series, and the two inductors in the center are not short-circuited through a high-resistance element. It was not possible to output sufficient output in accordance with the characteristics.

[Purpose of the invention]

The present invention is aimed at improving the drawbacks of the above-mentioned prior art, and is directed to the above-mentioned Japanese Patent Application Laid-Open Nos. 49-86807 and 54-2.
It has a unique torque characteristic that cannot be overcome by the sum of both Publication No. 9005 and Japanese Patent Publication No. 27-4357, and the speed control range is wide from low speed to high speed, and the speed change is performed by a voltage phase shift device. Variable speed induction torque control with excellent torque characteristics and efficiency is achieved by applying a rated current that is approximately the same as that at the maximum rotation speed over the entire speed range from the starting point to the maximum rotation speed. In the ``hh motor 3, each of the non-magnetic material formed between the plurality of conductors or the resistance material formed by short-circuiting the plurality of conductors is ventilated to cool and radiate heat, and the electric rotation efficiency is effectively applied. An object of the present invention is to provide a cold rJ+ device for improving the durability of non-magnetic materials or resistive materials.

The variable speed induction motor of the present invention is used by being connected to a single-phase or three-phase power supply, and the rotor has a 79-way squirrel cage type, a two-wheel squirrel cage type, and a deep groove squirrel cage type.

It can be applied to any type of special squirrel-cage rotor core, etc., and the conductors used in the explanation of the present invention include conductors installed in the squirrel-cage rotor core, and conductors installed in the squirrel-cage rotor core. It collectively refers to each of the wound wires, and it is optional to connect the plurality of stators to the power supply in parallel, or to connect the plurality of stators in series. It can be adopted by

[Means for Solving the Problems] In order to achieve the above-mentioned technical problem, the present invention provides a plurality of rotor cores mounted on each of a plurality of rotor cores which are fixed to a rotating shaft at arbitrary intervals. Each of the conductors is connected to form an integral rotor, and the plurality of conductors are connected to each other in a space formed between the plurality of rotor cores installed in each of the rotor cores or in a non-magnetic material part. Among the plurality of stators, the plurality of stators are short-circuited and connected by a material, and a plurality of stators are arranged in parallel and facing each other concentrically with the plurality of rotor cores and on the outer periphery thereof, and installed on the inner periphery of the machine frame. In an electric motor provided with a voltage transfer device associated with at least one stator, a space defined by the plurality of stators, between the bent rotor cores, and by the machine frame is formed in the ventilation shell, and A ventilation port is provided in the machine frame and communicates with the ventilation shell, so that the resistance material is radiated with cold outside air and exhausted to the outside of the machine frame. A means for solving the above-mentioned problems is provided by providing an air outlet and passing three blowers through either the air outlet or the air outlet.

[Function] In the present invention, since a voltage phase shifting device is provided in relation to at least one stator among the plurality of stators, the phase of the voltage induced between the plurality of stators and the phase of the voltage induced between the plurality of stators are changed. There is a phase shift in the phase of the voltage induced between the multiple conductors wound around the rotor core and the other multiple conductors, and the voltage induced in the rotor conductor according to the phase shift occurs. The voltage changes, and the rotational speed of the rotor can be changed arbitrarily by increasing or decreasing the voltage induced in the rotor conductors.

In addition, since the plurality of conductors wound around the plurality of rotor cores are short-circuited and connected through the resistive material between the plurality of rotor cores, the plurality of conductors are connected by short-circuiting through the resistive material, especially at startup and during consecutive low rotational failure operations. Electric current inevitably flows from the plurality of 9 bodies provided in the rotor core via the resistive material, making it possible to generate strong rotational torque.

By the way, from startup to maximum speed operation, the time required is extremely short and there is no problem, but especially when operating at medium and low speeds, non-magnetic or resistive materials Heat generation increases, and due to the heat generation effect, the electric rotation efficiency and the durability of the non-magnetic material or the resistance material are significantly reduced. In the present invention, the air outside the machine frame is introduced into the ventilation shell by the blower, the non-magnetic material or the resistive material is cooled and the heat is radiated, and the exhaust air is discharged from the ventilation shell to the outside of the machine frame. The action of the resistive material, in which multiple conductors installed in the child core are short-circuited and connected between multiple rotor cores, works accurately without fluctuations, allowing the motor to operate at variable speeds in any rotational range from low speed to high speed. be able to operate normally and efficiently.

〔Example〕

Embodiments of the present invention will be described based on FIGS. 1 to 22.

A first embodiment of the present invention will be explained with reference to FIGS. 1 to 3.

Reference numeral 1 shown in FIG. 1 is a variable speed induction motor according to the present invention, and the induction motor (1) has the following configuration.

Rotor cores 2.3 made of iron cores are mounted on a rotor shaft 4 with arbitrary intervals, and a non-magnetic core 9 is interposed between the rotor cores 2.3. In the non-magnetic core 9 portion between the rotor cores 2 and 3, the non-magnetic core 9 is made of heat-resistant materials such as asbestos, porcelain, etc.

(including non-magnetic new ceramics, etc.).
It may be formed integrally by surrounding it, or it may be formed with an opening at a suitable location. Each of the plurality of conductors 5... installed in the rotor core 2.3 is connected in series to form an integral rotor 8, and the plurality of conductors 5... connected in series are connected in series. Both ends are connected by short circuit 1'a6.7. In addition, the rotor core 2.3 and the non-magnetic core 9
A plurality of ventilation cylinders 12 . The plurality of conductors 5... installed in the rotor 8 are made of nichrome wires that serve as connecting materials for each of the plurality of conductors 5... in the non-magnetic core 9 portion between the rotor cores 2 and 3. , carbon mixed in! I.

Short circuit jI via resistive material r... such as conductive ceramic
■The resistance material r... is sometimes coated with an insulating coating. The non-magnetic core 9 includes a plurality of aluminum materials,
A plurality of cooling bodies 13 made of a non-magnetic material such as ceramic material, resin, rubber, or glass are attached, and the cooling bodies 13 are formed on the cooling W vehicle body 13A. As shown in FIG. 2, the cooling fi1 effecting body 13 can be formed by forming the non-magnetic core 9 into a cooling fan using the arbitrary non-magnetic material, or by forming the cooling effect body 13 into various shapes. The cooling effect body 13 can be mounted around one or both inner surfaces of the rotor cores 2 and 3 for a plurality of times, and a cooling PJ1 effect body of any type can be attached to the rotor shaft in the space of the rotor core 2.3. 4, and a plurality of resistive materials r... may be formed in the cooling effecting body 13 as, for example, a jig shape or any other cold fJItff support body, and the resistive materials r...
The cooling effecting body 13 may be formed of any of the above-mentioned non-magnetic materials as cooling stirring bodies in various shapes. In addition, the above-mentioned asbestos, 1?, is made of heat-resistant material on one or both sides of the inner surface of the rotor core 2.3. Lamic wood, etc. may be installed. (Fig. 1.

(See Figure 2) Connecting rods 17 and 16 bearings provided on both sides of a cylindrical frame 14 with bolts at both ends.
... and nuts 18..., cooling impellers 19 and 20 are attached to both sides of the rotor 8, and both ends of the rotor shaft 4 are fitted into the bearing discs 15 and 16. Bearing 21.
21, and the rotor 4 is rotatable.

A winding 2 is concentrically arranged on the outer side of the rotor core 2, 3.
The rotating stator 31 subjected to 2.23 and the second identifier 25 are arranged facing each other in parallel, and a sliding bearing 26 is installed between the machine frame 14 and the rotating stator 31, and the sliding bearing 26 is installed between the machine frame 14 and the rotating stator 31. The left and right movement is fixed by the stop ring 28 fitted in 14,
The machine frame 14 and the second stator 25 are fixed by a ventilation fixing ring 27A and a fixing ring 27B, which are provided with ventilation windows at several locations. A gear 33 is fitted on the outer peripheral surface of one side of the rotary stator 31, and a drive gear 36 is connected to a small motor 35 for forward and reverse rotation, which is formed by a drive device 29 fixed on the outer periphery of the machine frame 14. A plurality of ventilation holes 39 are formed in the outer periphery of the machine frame 14, and a plurality of ventilation holes 40 are formed in the bearing discs 15, 16.

Ventilation is provided in a space 66 formed between the rotor cores 2 and 3, the rotating stator 31 mounted on the sliding bearing 26, and the second stator 259 machine frame 14 fixed to the ventilation fixing ring 27Δ and the fixing ring 27B. 111167, a plurality of openings are fixed to the machine frame 1 and communicated with the ventilation trunk 67, and the plurality of openings are formed into an arbitrary number of ventilation ports 68 and ventilation ports 69. A motor 72 that is pivoted to a windmill 71 is attached to a blower body 70 to form the blower blower 3, and the motor 72 is formed to be able to freely rotate in forward and reverse directions, and is connected to any speed change means such as a voltage regulator and an inverter. In some cases, it is formed so that the speed can be changed freely.

The blower device 73 is fixed to the machine frame 14, and the blower device 7
The air intake part 74A of No. 3 is connected to the air outlet 69 to communicate with the ventilation body 67, and the air outlet 6 introduces outside air from the other side of the air outlet 69.
8 is connected to the ventilation barrel 67, and the ventilation section 7413 is formed in the ventilation section 1170.

The driving gear 36 partially inserted into the machine frame 14 through the opening 37 is engaged with the gear 33 fitted to the rotating stator 31, and a small motor 35 equipped with a switch and forming the driving device 29 is connected. It is connected to the rotating stator 31 via a rotating mechanism 30 consisting of a gear 33.13 and a drive gear 36, and the rotating stator 31 is rotatable.
A rotary stator 31 is provided in the voltage phase shifter 100 and is rotatable relative to the stator 25 .

A magnetic sensor 32 is attached to the outer peripheral surface of the rotating stator 31,
A plurality of magnetic detectors 34 with different terminal diameters for detecting magnetism in relation to the magnetic sensor 32 are embedded in a non-magnetic plate 41, and the non-magnetic plate 41 is attached to the inner peripheral surface of the machine frame 14. The magnetic sensor 32 and the magnetic sensing body 34 form a rotational position detector 42, and the magnetic sensor 32 is
It is electrically connected to a display 43 into which the rotational position n of the rotational stator 31 set for each magnetic detection body 34 is input. Reference numeral 38 denotes a solenoid that controls the entry and exit of a protrusion. A speed detector 44 such as a tacho generator is mounted on the child shaft 4, and the total of 4 speed detectors 44 is a speed indicator 4.
It is connected to 5.

Next, based on FIG. 3, the rotary stator 31 and the second stator 2 are
The connection of the windings 22 and 23 wound around each of the windings 22 and 23 will be explained. The rotary stator 31 and the second fixed end 25 are connected in series with windings 1, 22, and 23 each having a star connection. That is, the terminals A, B of the winding 22 of the rotating stator 31,
C is connected to the commercial three-phase power supply A, B, and C, and the winding 2
The terminals a, b, and c of the second stator 25 are connected to the terminals A, B, and C of the valley wire 23 of the second stator 25, and the terminals a, b, and c of the winding 23 are short-circuited and connected.

The operation of the above configuration will be explained below.

When the winding Fl122.23 is energized from a commercial three-phase power supply, a rotating magnetic field is generated in the rotary stator 31.25, voltage is induced in the rotor 8, current flows through the conductors 5 of the rotor 8, and the rotor rotates. Child 8 rotates. When the amount of rotation of each second stator 25 with respect to the rotation stator 31 is set to zero, there is no phase shift in the magnetic flux of the rotating magnetic field generated in each stator 31.25, and the details are connected as described later. Since no current flows through the resistance material r..., it has the same torque characteristics as a general induction motor.

Next, a case will be described in which the small motor 35° is operated to rotate the rotary stator 31, and the rotary stator 31 is rotated by θ in the electrical phase angle. Rotating stator 31 and second stator 2
The magnetic flux φ1 of the rotating magnetic field created by 5. The phase of φ2 is shifted by θ, so the voltage φ1.02 induced in the conductor 5 of the rotor 8 by the rotating stator 31 and the second stator 25
The phases of are shifted by θ. Now, the voltage 62 induced in the conductor 5 of the rotor 8 by the second stator 25 is used as a reference, and this voltage is set to 6y = SE. Here, S is slip and E is the induced voltage when slip is 1. The voltage d induced in the conductor 5A by the first stator 24
1 becomes 6+=3EεJO.

(E = induced voltage when Libery 1) What is shown in Fig. 4 is the case where the resistive material r... that short-circuits the plurality of conductors 5... is not installed in the non-magnetic core 9 section. This shows the relationship between the slip S of the rotor 8 and the active power P of the rotor input.The active power P is maximum when the voltage phase is θ = 0°, and when the phase of the voltage is θ = 0°, the active power P is maximum. is smaller than that. Here, there are 9 bodies and 5...
If the resistance and inductance of are R and L, and the angular frequency of the power source is ω, then the maximum of the active power 1] is S = (
Appears when R/ωI-).

Since the effective power I) is proportional to the driving torque of the electric hammer 1 of the induction coil 9, the rotor 8 is rotated by operating the small motor 35 and rotating the rotary stator 31 with respect to the second stator 25.
By adjusting the voltage induced in the rotor, the speed of the rotor can be controlled steplessly.

Next, let R1 and R2 be the respective resistances from the short circuit rings (3, 7hS to the connecting material) of the conductors 5 of the rotor 8, let Ll and L2 be the inductances, and let ω be the angular frequency of the power source. If the resistance of the resistive material short-circuiting each of 5... is r, the electrical equivalent circuit of the rotor 8 is as shown in Fig. 6, and the symbols I+ and 12.I:1 flow through each branch. It shows the current.

Next, if we convert what is not shown in Fig. 5 into an equal circuit seen from both stators 31 and 25 sides, it becomes as shown in Fig. 6, and R+ =
When R2, L-+ = L2 and θ=0°, 13=I+
-12=O, and no current flows through the resistor material r. This means that when o=o', 1 to r T is equal to the value when r does not exist. Therefore, θ
=06, it has the same torque characteristics as a conventional induction motor.

Next, when R+=R2, Lt=L2 and θ=180', I+=-12, I:+=I+-12=2I+
Therefore, in the conventional 4-conductor #J machine, if the resistance of the rotor conductor is RI=R2=R, the result is similar to that in which R increases to r<+2r.

Due to the rotation of the rotor 8, outside air is sucked into the machine frame 14 by the cooling impeller 19°20 through the communication port 40 bored in the bearing W15, 16, and the cooling impeller 19G is twisted. Cool the line 222 rotor core 2, 4, 5... etc.
The surplus air is exhausted to the outside of the machine frame 14 through the JI air holes 39A, and is sucked by one blade wheel in the cooling blade wheel 20. , rotor core, non-magnetic core 92 cool the rotor core 3, 1 lqb
The air sucked from the receiving plate 16 is merged with the winding 23. Etil is't! through the second stator 25! The exhaust air is passed through the ventilation window of the ventilation fixed link 27A to the machine frame 1.
It is discharged from the 11 air holes 39B of 4, and the windings 22, 2
3. Rotor core 2.3, non-magnetic material 9. The i-function is stably applied to each of the conductors 5...

Next, FIG.
This will be explained with reference to FIG.

Since the windings 22 and 23 are connected in series, the quotient n13 phase T
A current flows between the windings 22 and 23 from the source i, but even if there is a difference in the phase)t of the resistance of each of the windings 22 and 23 or in the size of the capacitance n1 of both stators 31 and 25, Regardless, the magnitude of the current flowing through each winding 22, 23 is equal, so that the current induced from each of the rotating stator 31 and the second stator 25 into the conductor 5 of the rotor 8... The magnitude of the flowing current is equal, and the rotating stator 31. Both stators 31.25 are adjusted according to the rotational difference with respect to the second stator 25, α1, that is, the phase shift that occurs in the magnetic flux of the rotating magnetic field.
The force that causes the magnitude of the current flowing from each of the conductors 5 of the rotor 8 to be equal, and the vector difference current caused by the phase difference in voltage between both stators 31.25. Due to the synergistic effect of the force that inevitably flows through the resistive material r... which connects each of the plurality of conductors 5..., the slip and torque shown in Fig. 7 are obtained. As shown in the characteristics, efficiency can be improved and a large torque can be output in each speed range, and when the load is connected, C can be easily started in each speed range, and the starting characteristics of the load can be improved. It can be used to adapt to a smooth start, or to start with high output, and can be used to suit a power source that is frequently started and stopped. As mentioned above, the speed change of the rotor 8 is
i1+I that controls the phase shift in the rotating stator 31 to increase or decrease the current flowing through the conductor 5 of the rotor 8
The rotational speed of the rotor 8 can be changed arbitrarily only by J all.

Note that the rotating stator 31 has windings 22 and 23 connected in series.
and the second stator 25 to the conductor 5 of the rotor 8, respectively.
・For the magnitude of the current flowing in ・, multiple conductors 5...
The ratio of the current that flows through a short circuit through the resistive material r... is determined by the value of Pθ (P = number of pole pairs, θ = phase angle), regardless of the resistance value and slip of the resistive material r... (The l arrangement ratio is maximum when Pθ = π and zero when Pθ = 0.) If Pθ is constant, ・When the secondary insertion resistance of a general wound induction lightning motor is constant When the slip and torque characteristics become similar and Pθ becomes small, the conductor 5 of the rotor 8...
The ratio of current flowing through the motor becomes small, and reducing Pθ has the same effect as reducing the secondary insertion resistance of a general wound induction motor. and both stators 3
1 and 25, even if the phase difference 0 is changed arbitrarily, the rated current and rated torque characteristics of the maximum speed can be changed depending on the selection of the slip value and the design of the resistance value of the connecting material. Even if A3 is used, it can be applied almost equally to the shift range of A3.

In addition, the windings 22.2 of the rotary stator 31 and the second stator 25
3 are connected in series, if a connecting material is provided between the conductors 5 and there is no short circuit, almost no current will flow through the rotor conductors 5 when there is a phase difference. This results in a phenomenon in which the efficiency and torque are significantly lower than in case b, in which the windings 22 and 23 of the inner stator 31 and 25 are connected to the power supply in parallel.

In contrast to the above, the winding PA of the rotating stator 31 and the second stator 25
22 and 23 are connected in parallel to a commercial three-phase power supply, the windings 22 of the rotating stator 31 and the second stator 25
．． 23, the voltages induced from each of the inner stators 31 and 25 to the conductors 5 of the rotor 8 are the same, but the voltage phases differ by Pθ, and The current flowing through the resistive material r, which serves as a connecting material between..., is (1/2) material r
The current is approximately proportional to the resistance value of... However, in addition to the current flowing through the resistance material r... in the conductor 5 of the rotor 8, it is approximately proportional to (sum voltage induced in the rotor conductor of the inner stator) ÷ (impedance of the rotor conductor). The currents flow in a superimposed manner. (The above sum voltage is maximum when Pθ=π is zero and Pθ=0, and the impedance of the rotor conductor is composed of the resistance of the conductor and the secondary leakage reactance, respectively, so it varies depending on the slippage.) Therefore, the conductor of the rotor 8 With respect to the magnitude of the current flowing through the conductors 5..., the ratio of the current flowing through the resistive material ``...'' between the plurality of conductors 5 varies depending on the slip and resistance value even if Pθ is constant. The slip and torque characteristics when Pθ is constant are the characteristics when the secondary insertion resistance of a general wound induction motor is constant, and the characteristics when the primary voltage of a general Lt conductive #J machine is controlled. As shown in FIG. 9, this characteristic is a mixture of the characteristics of the winding 22 of the inner stator 31.25.
．． The speed control range becomes narrower than the characteristic when 23 are connected in series.

By the way, (see Fig. 2) operation 1 of the variable speed dielectric motor 1
When the rotational position of the rotary stator 31 detected by the magnetic sensor 32 is, for example, 60 degrees in electrical angle at the beginning of m, the rotational position of the rotating stator 31 detected by the magnetic sensor 32 is 60° in electrical angle, without considering the starting characteristics of the load connected to the rotor shaft 4. Conventional problems include that when the power is turned on, the electric motor 1 cannot be started due to the connected load C that requires a large starting torque, and that it is necessary to ensure sufficient capacity B for the starting equipment. However, the feature and main point of the present invention is that the starting device is downsized, the starting device is made smooth, and the speed is freely variable. The magnetic sensor 32 of the rotation position detector 32 detects which rotational fixed position is located. For example, the rotation position of the rotation stator 31 can be detected by the magnetic sensing body 3.
4C is detected by the magnetic sensor 32 and communicated to the display r143, and the signal value is used on the display 43 to digitally display that the rotating position of the rotary stator 31 is 60 degrees in electrical angle. Based on the above rotational position display, the solenoid 38 is activated to unlock the gear A'-33, and the switch is used to reverse the small motor 35 to correspond to the starting characteristics of the load connected to the rotor shaft 4. For example, if the rotating position of the rotating stator 31 is set to 150 degrees in electrical angle so that the starting speed is set to
When the target starting rotational position fU is displayed, the operation of the small motor 35 is stopped, and the solenoid 38 is activated to lock the gear 33. , fixes the rotation of the rotation stator 31.

After the above operation is completed, when the windings 22 and 23 are energized from the power supply, the rotor shaft 4 starts the rotary stator 31 at a smooth rotational speed corresponding to the starting rotation position, and then the solenoid 3
8 to unlock the gear 33, operate the switch to rotate the small motor 35 in the forward direction, detect changes in the rotational speed of the rotor shaft 4 with the speed detector 44, and detect the change in the rotation speed of the rotor shaft 4. When the speed indicator 45 detects that the rotational speed has reached the desired rotational speed, the small motor 35 is stopped and the solenoid 38 is activated to lock the gear 33 and fix the rotation of the rotary stator 31.

Note that the rotational position of the rotational stator 31 at the time of startup is set to an arbitrary rotational position corresponding to the startup characteristics of various loads connected to the rotor shaft 4, and the magnetic It goes without saying that mounting any number of sensors 32 may be selected as appropriate.

After the adjustment of the target rotation position is completed, the motor 72 of the blower device 73 is activated at the same time as the start switch is input.
When the windmill 71 rotates, outside air is sucked into the ventilation barrel 67 from the ventilation port 68 by the wind turbine 71, and the outside air is stirred inside the ventilation barrel 67 by the cooling member 13, and the non-magnetic core 9 or the conductor 5.・・Resistance material r・・etc. are cooled and heat radiated, and
The air in the f11 cylinder 67 passes through the exhaust port 69 to the ventilation cylinder 70.
ff1lli170 is sucked into the air and sent from the exhaust port 74B.
Exhausted outside.

In the case of operation in a high speed region, the air blowing action of the cooling impeller 19, 20 sucking outside air is circulated through the ventilation barrel 12... to cool the rotor cores 2, 3 and the non-magnetic core 9. , the conductor 5..., the resistor material r... exerts a heat dissipation effect, and the exhaust air is discharged to the air exhaust cylinder 39A....

Since each of 3913... is used in combination, the resistance material r
The heat generated by ... does not become very high and no heat is stored. However, in the low-to-medium speed rotation range where the speed is changed, the heat generation of the resistance material r... increases rapidly, so the blowing action of the cooling impeller 19, 20 alone causes the resistance material r...
However, the blower device 73 blows outside air into the ventilation shell 67 to cool and radiate heat from the non-magnetic core 9 and the resistive material r... and exhausts the waste heat from the ventilation shell 67.
, the resistance material r... is cooled and heat radiated regardless of the rotational speed change of the electric motor 1, and the electric rotation efficiency is effectively applied, and the heat generation of the resistance material r... The durability of each of the non-magnetic cores 9 involved in this can be improved and maintained.

Note that the air exhaust port 74B of the air blower 73 is communicated with an arbitrary number of air outlets 68 provided in the machine frame 14, and the outside air is introduced into the ventilation JIii 67 by the air blowing from the air blower 73, and the exhaust air is passed through the arbitrary number of air outlets 68. 69 may be excluded. In any case, the air outside the machine is introduced into the ventilation shell 73 from one side of the machine frame 14, and the exhaust air is exhausted from the other side of the machine frame 14. T
J1 can drip effective effect on heat dissipation, air vent 68
．． There may be a plurality of exhaust ports 69.

In addition, as shown in FIG. 9, a pump 102 is installed in the water tank 101.
A refrigerant device 104 formed by a radiator 103 connected via a radiator 103 is connected to the ventilation port 68, and cools the air introduced into the ventilation cylinder 67 to cool the air introduced into the ventilation cylinder 67. Cooling heat radiation to the resistive material "..." is made more effective.Although not shown, the refrigerant device 13104 includes a cooler, a condenser, and a refrigerant gas.

Configuring with various other refrigerant devices can be arbitrarily selected and implemented, and the blower i! I? 73 is the rotor shaft 4
As the speed changes from high speed rotation to low speed rotation, the rotation speed of the motor 72 may be controlled toward high speed rotation, and the blower device 73 and refrigerant device 104
During high-speed operation, the motor 72 or one of the refrigerant devices 104 may be stopped, and the relationship with the electric efficiency of the motor 1 may be checked based on data to prioritize energy saving. In addition, the ventilation system V! 173. Each of the other refrigerant devices 104 is not directly connected to the machine frame 14, but is disposed elsewhere, so that the refrigerant devices 104 are not directly connected to the machine frame 14, and are disposed at other locations such as the °C transport chamber 68 or the exhaust system. Communication with the B port 69 via a duct can be selected and implemented as desired.

In the above, the rotating stator 31 with respect to the second stator 25
Although a configuration has been described in which the voltage phase shifter 100 is rotatably formed and formed in the 1u voltage phase shifter 100, the 5A voltage phase shifter 100 is not limited to the above configuration, and can be formed by various means shown below. You can choose to do whatever you want.

First, as one of the voltage phase shifting devices 100, as shown in FIG.
Winding wires 92A formed in arbitrary plural kinds of pole numbers for each of
928.93A.

93B, windings 92A, 928.93A.

93B each has a plurality of pole number changeover switches 81 to S.
20, and the voltage phase shift bag M100 is formed by the pole number changeover switches 81 to 820 and connected to a power source. electric e
The number of poles selector switch corresponding to the start-up operation and specified speed required for the load connected to the rotor shaft of
For applications that require a wide range of speed changes for the load connected to the rotor shaft, the stator should be 90°91°.
Windings 92A, 92B, 93△ to be wound on.

93B may be wound with a winding wire having an arbitrary number of poles.

In contrast to the above-mentioned embodiment in which the speed is changed by rotating the rotary stator 31, this method allows rapid speed change control to a speed close to the desired synchronous speed, and also allows the load to be Although it has the advantage of being able to generate large torque from low to high speeds in response to the speed changes that are made, it also has the disadvantage of not being able to change speed steplessly.

In addition, FIG. 11 shows windings 92A, 92B, 93Δ, 93
The relationship between slip and torque is shown when the number of poles of B is changed to 4 poles or 8 poles using the appropriate pole number conversion switch... and the windings 92A and 92B and the windings 93A and 93B are connected in series. This graph shows the effect of connecting the windings 92A, 92B and the windings 93A, 93B in series, and the effect of switching the number of poles to a nearby synchronous speed to achieve the speed change control 211 required for the rotor shaft. Due to the synergistic effect, it is possible to improve efficiency in a wide range of control areas and output large torque, making it suitable for power sources that frequently perform start, stop, and gear change control and require wide range speed control. Used to great effect.

Next, the other means of the voltage phase shifting device will be explained based on FIG. 12. Winding 9 wound around stator 94,95
6.97 are connected in series or in parallel to a power supply via a plurality of phase changeover switches N1 to N19 to form a voltage phase shift bag L! It is configured at t100. In this means, the phase changeover switches N1 to N19 are appropriately switched to change the phase input from the power supply to the windings 96,97, thereby changing the rotational speed of the rotor shaft. However, in this case, since the phase is changed only by appropriately operating the phase changeover switches N1 to N19, the speed change range of the rotor shaft is increased in a stepwise manner. It is. However, if this voltage phase shifter is used together with the pole number changeover switches 81 to 820 attached to the windings 92A, 92F3. With respect to the rotational speed change of the load, it is possible to perform right-stage speed change control over a small range of the rotational speed to change the rotor shaft to a speed close to the synchronous speed.

Next, other means of voltage phase shift #1Arl will be explained with reference to FIG. The output side of the winding 112 wound around the stator 110 is connected to a power source, and the output side of the winding 112 is formed into a voltage phase shifter 100 by a single-phase transformer 115 and a plurality of connection changeover switches P1 to P4. However, the single-phase transformer and connection changeover switches P1 to P4 of the voltage phase shifter 115 are connected to the stator 111.
The winding 112 and the winding 1 are connected to the winding 113 wound on the
13 is connected in series. In this case, the winding 112 and the winding 1113 are connected to the medium phase transformer 115 by the switch P2. The phase of the voltage input to the winding tQ113 can be advanced or delayed with respect to the phase of the voltage input to the winding 112 by connecting them via P4 or by individually switching the connection changeover switches Pi and P3. This allows the rotational speed of the rotor shaft to be changed. Although this device can also control the speed change of the rotor shaft 4 only stepwise, it has the advantage of being able to control the speed change instantaneously.

Next, yet another embodiment of the voltage phase shifter will be described with reference to FIG. 14. The voltage phase shifter 100 of this embodiment is as follows:
It has a stator 105 fixed to a frame body and a rotor 106 rotatably pivoted inside the stator 105. The stator 105 has a primary winding 107, and the rotor 106 has a secondary winding. 108 is formed by a three-phase induction voltage regulator 109.

Terminal A of winding 112 of identifier 110, 8. C is connected to commercial three-phase power supplies A, B, and C. 3 phase induction voltage regulator 10
Terminals A and B of the primary winding of 9.

C are terminals a and b of the winding 112 of the stator 110.

C, and terminals a, b, of the secondary winding 10B.
connected to c. Terminals A, B, and C of the secondary winding 108 are connected to terminals A, B, and C of the winding 113 of the stator 111. That is, the windings 112 and 113 are connected to the voltage phase shifter 1 at the middle gate.
00 and 100 series through a three-phase induction voltage regulator 109.

In this embodiment, three phases with a secondary winding 108,
By rotating the rotor 106 of the J27 voltage regulator 109 by an arbitrary amount, the winding 112. of the stator 110.degree.
The phase of the voltage input to 113 can be shifted, and the rotation speed of the rotor shaft 4 can be controlled according to the required rotation speed.

Next, based on FIG. 15, the rotating stator 31. Second stator 25
Explain how to connect the windings wound on the wire. The terminals U, V, and W of the winding 22 wound around the stator 31 can be shorted to each other via a switch M1, and the terminals X, Y, and Z can be shorted to each other by a switch M6. Further, the terminals U, V, and W of the winding 22 and the terminals Z, X, and Y are connected to each other via a switch M2. On the other hand, terminals U, V, and W of the winding 23 wound around the second stator 25 are connected to the switch M.
9, and terminals X, Y, and Z are connected to a commercial three-phase power supply via switch M3. Terminals U, V of winding 23,
W-beam n-way switch M7 mutually 'm M shi1
9. Also, the terminals U and V of the winding 23.

W and terminals Z, X, and Y can be connected to each other via a switch M4. And the terminals R and V of the winding 22
, W and volume 1023 (7) terminals X, Y.

2 through switch M8, and between terminals X, Y, Z of winding 22 and terminals U, V of winding 23.

By connecting W via switch Mm,
The winding 22 and the winding 23 can be connected to each other in series.

The operation of the above configuration will be explained below based on FIGS. 1 and 15.

Rotating stator 31. The windings 22 and 23 of the second stator 25 are connected as delta connections by turning on switches Ml, M3, and Mm and opening the other switches.
2. When power is supplied from a commercial three-phase power supply to 23, winding 2
There is no phase shift in the voltage input to 2.23, it has the same torque characteristics as a general induction motor, and the rotational speed of the rotor shaft 4 is the maximum rotational speed.

By operating the small motor 35 and rotating the rotary stator 31, the rotational speed can be continuously reduced. The phase difference of the voltage between the inner stators 31 and 25 is 180"
When this happens, the reduction in rotational speed reaches its limit.

Phase angle θ = 0 when windings 22 and 23 are connected in delta
The relationship between slip and torque from ° to 0 = 180 ° is shown in Fig. 16 as J3, and slip 81 to S2
Within this range, the rotational speed of the rotor shaft 4 can be arbitrarily controlled and used. However, in the above situation,
In the range of slip S from 5=S2 to S=i,o,
The speed i1JW in the area indicated by the phantom in FIG. 16 becomes impossible.

To deal with the above phenomenon, switches Ma, M8 and M9
At the same time as turning on the other switches, the winding 22.2
Switch the connection in step 3 to star connection, and in this state,
Magnetic flux φ1', φ2 of the rotating magnetic field created by the inner stators 31 and 25
′ becomes the same phase. Moreover, the winding 22 of the inner stator 31.25
Since each of the windings 22.
The voltage applied to 23 is 1/J3 of that in delta connection. Therefore, the voltage induced in the conductor 5 of the rotor 8 by the magnetic fluxes φ1' and φ2' is also 1/f3, and the rotor 8
Since the torque of is proportional to the square of the voltage, the torque is 1/3.

Therefore, by switching the connection of the windings 22 and 23 of the rotary stator 31.25 to star connection using a switch, the 1~Luke characteristic is changed to θ=180° as shown in FIG.
The torque when 3=1.0 is -r+/3, and θ
=0° The trick when S=1.0 is T2/3,
The area where speed control is not possible, shown by hatching, becomes considerably smaller.

Next, a second embodiment of the rotational position detector will be described with reference to FIG.

An elongated detection plate 46 is fixed to the outer peripheral surface of the rotary stator 31, and a plurality of limit switches 47.
47a .
8, and limit switches 47a...47
n is connected to a display 49 which calculates the change in the electrical resistance value inputted with the same output signal and displays the rotational position of the rotational stator 31 in electrical angles.

With the above configuration, when the rotating stator 31 is stationary, the rotating position of the rotating stator 31 is displayed on the four indicators based on the corresponding resistance value of the limit switch 47 that is in contact with the detection plate 46. Ru. For example, when only the limit switch 47a comes into contact with the detection plate 46, the rotating position of the rotary stator 31 is displayed as 0° in electrical angle on the display 49, and the following limit switches 47b, 47c, 7d, 47e, etc. ··teeth,
"15 in electrical angle", 30', 45', 60
'... is displayed. It goes without saying that any number of limit switches 47 can be installed, and that various detection plates can be used. The configuration and operation other than those described above are the same as those of the first embodiment, so details thereof will be omitted.

Next, a third embodiment of the rotational position detector will be described with reference to Fig. Wi19.

A disk 50 is attached to the side wall surface of the rotating stator 31, and the disk 50
A plurality of detection holes 51 with different diameters are drilled in the frame 14, and a photo sensor 53 is attached to a bracket 52 screwed to the inner circumference of the machine frame 14, and integrated with the rotary stator 31. The photo sensor 53 is formed in the rotation position detector 54 so as to face the detection hole 51 which rotates, and the photo sensor 53 is connected to a display device 55 equipped with a calculation function. It is.

The operation of the above configuration will be explained below.

At the rest position of the rotating stator 31, the photosensor 53
When detects the corresponding detection "7L51," the detection signal of the sensor 53 is calculated on the display 55, and the rotational position of the rotary stator 31, that is, the electrical angle, is displayed.Start operation. If the rotational position of the rotational stator 31 is assumed to be 120° in electrical angle, the rotational stator 31 is rotated so that the photo-inser 53 detects the detection hole 51j, and the display 55 indicates 120°. When is displayed, the start switch is activated, and the rotary stator 31 is then rotated to control the desired normal rotational failure.The configuration and operation other than the above are the same as in the first embodiment. Details are omitted.

Next, a fourth embodiment of the rotational position detection device will be described with reference to FIG.

An opening 56 is formed in the lower part of the machine frame 14, and the first stator 24
A worm gear 57 is fixed to one corner of the rotary stator 5.
8. A rotating shaft 61 with a worm 60 fitted therein is attached to a pulse motor 59 mounted on the outer periphery of the machine frame 14, and the worm 60 is screwed into the worm teeth ItI57 to form a drive device 64. A rotary encoder 62 coaxially connected to the rotating shaft 61 is connected to a display 63, and the display 63 is equipped with a memory circuit, an arithmetic circuit, and a digital display section, and is formed in a rotational position detection path 65.

The effects of the above configuration will be explained below. Display device 6 into which output No. 13 of rotary encoder 62 is input
3, the rotational position of the rotational stator 58 is 0° in electrical angle.
, and until the rotating position of the sequentially rotating stator 58 reaches 1800 electrical degrees, the pulse motor 59
The rotational position of the rotary stator 58 is converted into an electrical angle based on the pulse signal detected by the rotary encoder 62 as the rotary encoder 62 rotates. The relationship with the corner is memorized.

Therefore, when the output value of the rotary encoder 62 is input to the display 63 at the time of starting operation, the calculated q value is output to the digital display section and the rotation position of the rotation stator 58 is displayed in electrical angle. Then, the pulse motor 59 is operated so that the starting rotation speed corresponds to the starting characteristics of the load on the rotor shaft.The rotary encoder 62 detects the rotation angle of the pulse motor 59 and displays its output signal on the display. 63
Check the sequential changes in the electrical angle displayed on the digital display, and when the desired electrical angle is displayed, stop the operation of the pulse motor 59, activate the start switch, and start the pulse motor again. -59 is controlled so that the load connected to the rotor shaft 4 reaches a desired rotational speed.

This embodiment differs from the first embodiment in that the rotary stator 58 and pulse motor 59 are connected to a worm gear 57. Since the rotary stator 58 is connected to the worm 60, it is possible to fix the rotary stator 58 when it stops rotating without installing a separate device.
The rotational position detector 65 of 8 is the rotary encoder 6
2, etc., the rotational position of the rotational stator 58 can be detected steplessly and displayed as ``C'', and starting control can be carried out extremely smoothly.

In addition, in the embodiments of each rotational position detection device row, only the case where the rotational stator 31 is rotatably formed as a voltage phase shifter has been described, but the rotational stator 31 and the second [
Both the i' and l stators 25 may be rotated, and in this case, the rotation range of both stators 31.25 can be reduced to perform speed change control from the electrical angle 0° to 180°. ,
The driving device for the rotating stator 31 is not limited to a small motor or a pulse motor, but may be an air cylinder, a hydraulic cylinder, an electric cylinder, etc., which can be connected to various rotating mechanisms.

Next, an embodiment of automatic control of a variable speed induction motor will be described with reference to a block diagram shown in FIG.

(See FIGS. 1 and 2) Input/output control circuit 76, control circuit 77, arithmetic circuit 78. A system consisting of a memory circuit 79, etc.
The tacho 1 is equipped with a speed display 45 mounted on the rotor shaft 4 on the input side of the Il device 75! Velocity detector 4 such as Nerator
4. A rotational position detector 42 that detects the rotational position of the rotational stator 31 and a temperature detector 80 attached to an appropriate position on the ventilation barrel 67
, a start switch 82 and a keyboard 81 equipped with a display are connected, and a small motor 35. is connected to the output side of the control device 75. A motor 72 and a solenoid 38 are connected to a blower device 73 for cooling and dissipating heat from conductors 5, resistors r, etc., and the following control information is provided from a keyboard 81 to a memory circuit 79 of a control device 75. The value is human-powered. That is, the amount of rotation of the rotary stator 31 corresponding to a phase angle of 0° to 180°, and the rotation angle of the rotary stator 31 (0° to 180° in electrical angle)
0'), the speed control value that controls the rotation speed of the motor 72 with respect to the rotation angle of the rotation stator 31, and the relationship with the rotation position detector 42 that detects the Several kinds of starting setting values that match the starting characteristics of the loaded load and a base ring temperature setting value that controls the motor 72 to increase or decrease with respect to the temperature detected by the temperature detector 80 are input.

When the operation preparation key is input from the keyboard 81 at the time of starting operation, the rotation position detector 42 detects the current rotation and movement position of the rotation stator 31, displays it on the display, and connects it to the rotor shaft 4. When an arbitrary starting setting value that matches the starting characteristics of the load is entered from the keyboard 81, the control device 7
In response to the signal output from the memory circuit 79 of 5, the solenoid 38 is activated to release the gear 33 fitted to the rotary stator 31, and the small gear 35 is activated to release the rotary stator. When the small motor 31 is rotated and reaches the desired starting rotation position, the small motor 35 automatically stops.

When readiness for operation is displayed on the display, the speed control value of the rotor shaft 4 is input into the control device δ75 from the keyboard 84, and the amount of rotation of the rotary stator 31 is adjusted to match the input speed control value. be done. When the start switch 82 is activated and an input signal is communicated to the control device 75, the control device 75
In response to the output signal, the small motor 35 is operated to control the speed change of the rotor shaft 4.
44 is compared with the speed control value, and if there is a difference in speed, the control unit v175 outputs the output to the small motor 35 to correct the rotational speed.

The rotational speed of the motor 72 in a movement in which the rotation ho is rotated within the range of 0° to 180° with respect to the rotation m calculated value of the rotation stator 31 is stored so that it changes from low rotation to high rotation. Since it is set in the circuit 79, when the rotor shaft 4 is controlled to rotate at a high speed by the speed control value output from the control circuit 77, the motor 72 is controlled to rotate at a low speed, and the rotor shaft 4 is controlled to rotate at a low speed. When this happens, the motor 72 is controlled to rotate at high speed.

Is the temperature detection value of the temperature detector 80 communicated to the control device 75 higher than the reference setting value set in the memory circuit 79? : When the temperature reaches 5 lag, the rotational speed of the motor 72 is corrected by the signal output from the control device 75, and the ventilation effect in the passageway J111167 is increased to reduce the non-magnetic core 9..., the resistance material r...
etc. to restore the normal function of cooling FJJ heat dissipation. Also,
Regardless of the speed control value that controls the motor 35 that rotates the rotary stator 31 to rotate forward or backward, the air is blown according to the output signal from the control device so that the detected value of the temperature detector 80 becomes the reference temperature setting value. The rotational speed of the motor 72 of the device 73 may be controlled to increase or decrease.

During the above operation, if a new rotational speed value is input from the keyboard 81, or if the speed υJtlll is directly input from the control I panel connected to the load to the control 75 automatically via the keyboard 81. , rotation (Q lff1 detector 4
Based on the current position of the rotary stator 31 communicated from 2, the small motor 35 is operated to a desired speed value to control the speed change to the target rotational speed of the rotor shaft 4.

Note that as the rotational position IN detection device connected to the control device 75, one of the rotational position detection devices ff48, 54.65 may be adopted and connected instead of the rotational position detection device 42, and the rotational position detection device 42 may be connected to the rotational position IN detection device. A small motor 35 that rotates the child 31
Instead, use a pulse motor 59, an air cylinder, a hydraulic cylinder, an electromagnet, etc. various times! 11J m structure, or as a voltage phase shifter, any VL shown in Figures 1, 10, 12 to 15 can be used.
In addition, various refrigerants aa1o4 may be selected and connected in place of the blower device 73 provided with the motor 72.

Furthermore, the variable speed induction motor of the present application can also be used as an induction generator, and if the rotor shaft 4 is directly connected to a turbine, gas turbine, solar thermal power generation R, etc. to generate °C power, an expensive speed control is required. The machine can also be omitted. In addition, when an internal combustion engine is connected as a prime mover, it can correspond to the rotational speed that achieves the minimum fuel consumption of the internal combustion engine, and even when the power from feng shui as an energy source is weak and unstable, the rotational speed can produce its maximum output. In hydroelectric power generation, power can be generated efficiently according to the flow velocity, and complicated and expensive variable pitch devices or phase adjusters can be omitted. Furthermore, synchronization with external power can be performed without an expensive synchronization device. Furthermore, if a switch is provided that connects another rotating shaft to the rotor shaft and switches the two phases on the input side of the stator winding, and the rotor shaft can be freely rotated in the forward and reverse directions by the switch, the switch Electric braking 1i from operation with voltage phase device
! By controlling the rotational speed with a voltage phase device, the braking force of the rotating shaft connected to the rotor shaft can be efficiently adjusted.

What is shown in FIG. 22 is a case in which each of the plurality of conductors 5 installed in each of the C1 rotor cores 2 and 3 rotates in the space between the rotor cores 2 and 3 or in the 9 parts of the non-magnetic core. This is an embodiment in which a high resistance ring 116 fitted into the child shaft 4 is short-circuited by a resistance material r serving as a connecting member. Resistance material
Even if they are not connected to all of the conductors 5, it is possible to obtain the appropriate effect.

In addition, the cooling body 13 is attached to the non-magnetic core 9 by the cooling blade vehicle body 13.
A, attaching the cooling blade vehicle body 13A directly to the rotor shaft 4, and making the conductor r... asbestos, 1! The T-magnetic core 9 is surrounded by a heat-resistant material made of lamic wood or the like.
It may also form.
4 [Effect of the invention □] As explained above, according to the present invention, a plurality of conductors are installed in each of a plurality of rotor cores, and the plurality of rotor cores are mounted on a rotating shaft. a structure in which the plurality of conductors are short-circuited and connected by a resistive material between the plurality of rotor cores; and at least one stator among the plurality of stators. In the electric motor having a configuration in which a voltage phase shift device is provided, a space between the plurality of stators, between the plurality of rotor cores, and a machine frame in which the plurality of stators is installed includes a ventilation barrel. Since the configuration is such that the air blower is connected to the air outlet or exhaust port opened in the machine frame, the air blower is operated to introduce outside air into the ventilation shell, effectively dissipating cold fJl heat from the resistance material. In addition to being able to fully secure torque particularly in the low and medium speed ranges and increasing the electric efficiency of the motor, it has a remarkable effect of improving the durability of the resistance material.

[Brief explanation of the drawing]

1 to 22 are illustrations of embodiments of the present application. Fig. 1 is a side sectional view of the induction motor, Fig. 2 is a side view showing the rotation mechanism of the rotating stator and the feeder 8a, and Fig. 3 is a side view showing the rotation mechanism of the rotating stator and the feeding device 8a. Figure 4 is a diagram showing the relationship between rotor slip and active power, Figure 5 is an electrical equivalent circuit diagram of the rotor, and Figure 6 is an electrical equivalent circuit diagram from the stator side. , Figure 7 is a diagram showing the relationship between speed and torque when a plurality of conductors are each short-circuited with a resistive material and the windings wound around the stator are connected in series.
The diagram shows the stator. A diagram showing the relationship between speed and slip when each winding is connected to a power source in parallel. Figure 9 is a side view of the radiator connected to the ventilation shell. Figures 18 and 10 are diagrams showing the relationship between the speed and slip when the windings are connected in parallel to the power supply. Figure 11 is a diagram showing the relationship between speed and torque characteristics for 4-pole and 8-pole wires.
Fig. 2 is a configuration diagram in which a phase shift switch forming a voltage phase shift device is connected to a stator winding, and Fig. 13 is an embodiment diagram in which a voltage phase shift device is formed by a single-phase transformer and a phase shift switch. Fig. 14 shows an example in which the voltage phase shifter is an induction voltage regulator, and Fig. 15 shows whether the stator windings are connected in delta connection or in sprocket connection. −
16 and 17 are relationship diagrams between speed and torque characteristics. FIG. 18 is a sectional view showing a second embodiment in which the rotation position detector is formed by a limit switch. The figure shows the rotation sIa structure of the rotation stator.
Embodiment Figure 20 is a fourth embodiment diagram in which the rotary position detector is formed by a 0-tally encoder that performs storage and performance functions, and Figure 21 is an automatic! 1. FIG. 22 is a block diagram showing the configuration of II control, and FIG. 22 is a partial sectional view showing a resistive material connected between a plurality of conductors. 1... Induction motor 2.3... Rotor core 4
...Rotor shaft 5...Conductor 6.7...Short-circuit ring 8.8A-8C...Rotor 9...Non-magnetic core 10.11...Side part 12...For ventilation
13... Cooling effect body 13A... Cooling blade body
14...Shaft 15.16...Bearing 11 17...
Connecting rod 18... Nut 19.20... Cooling impeller 21... Bearing 22.23...
Winding 25...Second stator 26...Sliding shaft 2
7... Fixed ring 28... Stop ring 2
9... Drive device 30... Rotating mechanism 31...
・Rotating stator 32...faqi hinger 33...
・Y ear 34.34a to 34g...Magnetic detector 35...Small motor 36...Drive gear 37...Opening
38... Renoid 39... Ventilation hole
40... Ventilation hole 41... Non-magnetic plate 42
...Rotation position detector 43...Display device 44
...Speed detector 45...Speed indicator 46...
・Detector 47.47a-47n...Limit switch 48...Rotation position detector 49...Display device 50...
・Disk 51.51a~51n...Detection hole 52・
...Bracket 53...Photo sensor 54...
・Rotation position detection 55... Display 56... Opening 57... Worm gear 58... Rotation stator 59... Pulse motor - 60... Worm j
＼ 61...Rotary shaft 62...Rotary encoder 63...Display device 64...Drive device 65.
... Rotation position detector 66 ... Space 67 ... Ventilation barrel 68 ... Ventilation port 69 ... Ventilation port
70...Transmission 71...Windmill 72
...Motor 73...Blower device 74A...
・Air intake port 74B...Exhaust port 75...Control t
ll device 76...Input/output circuit 77...Control circuit 78...Arithmetic circuit 79...Storage circuit 80
... Temperature detector 81 ... Keyboard 82 ...
・Start switch 90.91...Stator 92A, 928.93A, 93B...Winding 94.95
... Stator 96.97 ... Winding 100 ... Voltage phase shifter 101 ... Water (a102 ... Pump
103...Radiator 104...Refrigerant device 105...Stator 106...Rotor
107...Primary winding 108...Secondary winding 109.
...Three-phase induction voltage regulator 110.111...Stator
112.113...Winding 114...Single-phase transformer
115...Single phase transformer 116...High resistance 1) r...Resistance material 81-S20...Pole number changeover switch N1-N19...Phase shift changeover switch 1-)1~P4...・Wiring selection switch M1 to MIO・
··switch

Claims (10)

[Claims] (1) A plurality of conductors installed in each of a plurality of rotor cores fixed to a rotating shaft at arbitrary intervals are connected to form an integral rotor, and the plurality of conductors are connected to each other to form an integral rotor. The plurality of conductors are short-circuited using a resistive material in a space formed between the rotor cores or a non-magnetic material portion, and a plurality of stators are arranged concentrically with the plurality of rotor cores and facing the outer periphery thereof. In the electric motor, a voltage phase shifting device is provided in relation to at least one stator among the plurality of stators arranged in parallel and installed on the inner periphery of the machine frame. A space formed between the rotor cores and the machine frame is formed in the ventilation shell, and a plurality of openings are provided in the machine frame so that the introduced outside air cools the resistance material, radiates heat, and exhausts the heat outside the machine frame. is opened to communicate with the ventilation barrel, the plurality of openings are formed into an arbitrary number of ventilation ports and ventilation ports, and a blower device is communicated with either the ventilation port or the ventilation port. Cooling system for variable speed induction motor. (2) A cooling agitator formed in the resistance material in the space within the ventilation barrel, or the rotor shaft or the non-magnetic material portion, or one or both of the inner surfaces of the plurality of rotor cores. Claim No. (1) in which a cooling effect body is attached to the surface
A cooling device for a variable speed induction motor as described in . (3) A refrigerant device consisting of a radiator, a cooler, a condenser, a refrigerant gas, etc. is disposed directly or via a blower at the air intake port or the air blower.
A cooling device for a variable speed induction motor according to item 1). (4) controlling the rotational speed of the rotor shaft so as to increase or decrease the rotational speed of a motor provided in the blower in accordance with a voltage phase shifter provided in connection with the rotary stator; Claim 1, wherein the voltage phase shifter and the motor are connected to a control device that provides a speed control value.
) A cooling device for a variable speed induction motor as described in item 2. (5) disposing a temperature detector at any location on the ventilation shell;
A control device for a variable speed induction motor according to claim 1, wherein a temperature detector and a motor of the blower are connected to the control device provided with a reference temperature set value. (6) At least one stator among the plurality of stators is set at an electrical phase angle of 0° to 18° with respect to the other stator.
Claims (1) to (1) above, wherein at least one stator among the plurality of stators is rotatably formed in the phase shift device within a rotation range of 0°. (5)
A cooling device for a variable speed induction motor according to any one of paragraphs. (7) Claim (1) wherein the voltage phase shifter is formed by connecting a phase changeover switch to a winding wound around at least one stator among the plurality of stators. ~
A cooling device for a variable speed induction motor according to any one of paragraph (5). (8) The voltage phase shifting device is formed by a single-phase transformer wound around at least one of the plurality of stators and a connection switch. A cooling device for a variable speed induction motor according to any one of paragraph (5). (9) A patent claim in which each of the plurality of stators is wound with a plurality of types of pole numbers, and a pole number changeover switch is connected to the terminal of the plurality of stators to form the voltage phase shifter. A cooling device for a variable speed induction motor according to any one of items (1) to (5). (10) The voltage phase shifter is provided with a switch that can freely switch the connection of the windings wound around each of the plurality of stators to either delta connection or star connection. A cooling device for a variable speed induction motor according to any one of items (1) to (5).