JPS59182000A - Controller of commutatorless motor-generator - Google Patents

Abstract

PURPOSE:To moderate a beat phenomenon by connecting a reactor in series with a preexciting field winding of an exciter. CONSTITUTION:A switch 3 is opened at the starting time, and electric power converted by a separately-excited inverter 6 into AC via starting resistors 8, 9 is supplied to a motor side armature winding 10. Since a current is flowed to a preexciting field winding 15 of an exciter at this time, a current is flowed by an exciter armature winding 13 to a field winding 12, a voltage is generated to a generator side armature winding 11, and a counterelectromotive force is generated to the motor side armature winding 10. When a counterelectromotive force becomes high, the switch 3 is closed, and the winding 15 is shortcircuited. A reactor 20 having sufficiently large impedance to the 100Hz or 120Hz contained between terminals 1 and 1' is connected in series with the winding 15. In this manner, a beat phenomenon occurred at the generator side armature winding can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a non-commutator motor that is controlled by a power source obtained by rectifying alternating current, and its purpose is to reduce the beat that occurs when the output voltage is 1. It is something to do.

First, a conventional control system for a commutatorless motor generator will be explained. Figure 1 shows an example of a control circuit for a conventional non-commutated motor generator, in which 1.1' is a terminal connected to the power supply, 2 is a filter reactor, 3 is a switch, and 4 is a current smoothing circuit. reactor, 5 is a filter capacitor, 6
is a separately excited inverter with three-phase Gretz connection, 7 is a commutation auxiliary circuit, 8.9 is a starting resistor for starting, IO is the armature winding on the motor side, and 11 is the armature winding on the generator side. be. Motor side armature winding lO and generator 1L machine side armature winding 11
is provided on the stator side. 12 is an electric motor provided on the rotor side.

This is a common field for generators. 13 is a root winding of the rotary armature type exciter, 14 is a field winding on the stator side (the excitation rock provided here), and 15 is a field winding for pre-excitation of the exciter (hereinafter referred to as pre-excitation). 16 is a control unit that controls the generator voltage to a predetermined value (C), and 17 to 19 are rectifier diodes. Figure 2 shows a power supply that rectifies alternating current and outputs direct current. This is an example of a circuit.

Terminal 1' is terminal 1. in FIG. l'l are connected respectively. Note that 31 is a transformer and 32 is a full-wave rectifier circuit consisting of a diode.

In the control circuit shown in Figure 1, at the start of starting, switch 3
is open, and power converted to alternating current by the separately excited inverter 6 is supplied to the motor side armature winding through the starting resistors 8 and 9. At this time (current also flows through the pre-excitation field winding 15 of this exciter, the exciter generates electricity, and as a result, 'ε current flows through the field 12 and flows through the armature winding 11 on the generator side. pressure is generated, and a reverse starting force is also generated on the motor side'*a child winding 10i.Note that while the back electromotive force is low, the separately excited inverter cannot commutate smoothly, but during this time the commutation auxiliary circuit The commutation action is performed by the operation of step 7. When the back electromotive force becomes high enough, the separately excited inverter 6 becomes capable of self-commutation. When the back electromotive force becomes high, the starting resistor 8 is closed by closing the switch 3. , 9, the pre-excitation field winding 15 of the excitation leakage is short-circuited and further accelerated to a steady rotation state (
This will happen.

By the way, when the main charging source is 50 Hz or 60 Hz, as in the case of a domestic tonkio, there are many IQ 01-I z or 120 Hz components between terminal 1 and terminal 1', and therefore the excitation Machine pre-excitation field winding 151 100
Or the 120Hz component is distorted.

In addition, another field winding 14t of the exciter controls the generator output voltage (mostly 5OHz in the case of domestic 4-air cars) by the control unit 16.
The control unit 16 is generally a full-wave rectifier circuit such as a thyristor, and as a result, the field winding 14 also contains a large amount of 120F (z component).

In other words, since the field windings 14 and 15 of the exciter contain AC components with very similar liquid numbers, a beat phenomenon occurs in the output voltage of the armature winding 11 on the generator side as a result. was there.

The present invention was made to solve the above-mentioned problems, and the present invention will be described below based on the embodiment drawings (9,
I will clarify.

Fig. 3 shows an example of a control circuit for a non-commutator traction generator with a reactor added according to the present invention. The portion shown in FIG. 1 is the same as in FIG. In addition, terminal 1.1' has
A power supply circuit as shown in FIG. 2 is connected in the same manner as described above. As shown in the figure, for the DC power supply from terminal 1.1', there is a current smoothing reactor (ill glue handle) 4, a switch 3, and a filter reactor (second glue handle) 2.
A filter capacitor 5 is connected between the two to form a T-shaped filter. A starting resistor (first resistor) 9 is connected between the filter capacitor 5 and one end of the switch 3. Its starting resistor 9 and filter capacitor 5
A starting resistor (second resistor) 8 and a pre-excitation field winding 15 of the exciter are connected between the connection point and the other end of the switch 3.
A series circuit consisting of a reactor (third glue reactor) 20 added according to the present invention is inserted and connected.

The impedance formed by ξ' (in this case, reactor 200) is between terminal 1 and terminal 1' (this includes 0 to 1
The IQOI (z or 1
20I (z component can be sufficiently reduced, making it possible to reduce the beat phenomenon to the extent that it does not pose a practical problem.

The present invention is applicable to the case where the starting auxiliary resistor is divided into two parts (i.e., the starting resistor is sealed in 8°wJ).
Field winding for pre-excitation of magnetic chess 15. IJ Akudol 20 is Naoyu 1
The impedance of the circuit connected to 1 becomes large, but
Since the filter effect is less than that of the starting resistor 9, it is important to select the starting resistor 9 appropriately (so that no loss is caused.Also, even if the voltage between the connection terminals l and 1' of the power supply suddenly changes,
Since the action of the starting resistor 9 causes the oscillation phenomenon to attenuate relatively quickly, it does not cause any problems and the present invention can be applied.

Further, FIG. 4 is a control circuit diagram of a non-fertile flow motor generator showing another embodiment of the present invention. In the figure, 21 force 1 is a resistance added according to the present invention, and is the same as the other part 10111A. Considering the figure 4 number, the above-mentioned figure 3 implementation I+1
” The difference is that, as shown in the figure, a starting resistor (second resistor) 9 and an excitation resistor are connected between the connection point of the starting resistor 9 and the filter capacitor 5 and the other end of the switch 3. A circuit consisting of a pre-excitation field winding 15 and a resistor (second resistor) 21 connected in parallel to the pre-excitation field winding 5 is inserted and connected.

In the configuration shown in FIG. 4, the pre-excitation field winding 1 of the exciter
5 has a large inductance, 100)-b or 12
The impedance is quite large for AC components of about 0 Hz. Therefore, even if the resistance value of the resistor 20 is relatively large, the alternating current component of 100 to 120 Hz can be bypassed, which has the effect of suppressing the beat phenomenon to an extent that does not pose a practical problem.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an example of the control circuit of a conventional non-commutator motor generator, Fig. 2 is a diagram showing an example of its power supply circuit, and Fig. 3 is a diagram showing an example of the control circuit of a conventional non-commutator motor generator.
The figure is a circuit configuration diagram showing a simple embodiment of the invention, and FIG. 4 is a circuit configuration diagram showing another embodiment of the invention. 6--separately excited inverter, 7... commutation auxiliary circuit, 8, 9... starting resistor, 10-... active side Hiroisogo makida, 11... starting 'Awakening side gL Isogo winding, 1
2. Field, 13. 1JL Isogo winding of rotating armature type exciter, 14. Rotating armature type excitation, Iso's Kaishu Makikatsu, 15.
・・Pre-excitation field winding of the exciter, 16 ・・Control unit, 1
7-19... Diode, 20. Reactor, 2
1...Resistor, 31 transformer, 32... Full wave rectifier circuit. For patent purposes, Atsushi Doi, representative of Sadato Toyo Denki Seizo Co., Ltd.

Claims (1)

[Claims] A motor generator is equipped with an armature winding of two electric motors on the stator side, and has a built-in rotating armature type exciter that supplies power to the rotating field, and commutation is achieved by the armature back-induced force of the motor. a closed circuit consisting of a DC terminal of the inverter, a first steering wheel, a switch, a second steering wheel, and a DC power source obtained by rectifying alternating current; a capacitor connected to form a T-type filter between a first glue axle and a second glue axle; a first resistor connected between the capacitor and one end of the switch; A series circuit consisting of a second resistor, a pre-excitation field winding of the exciter, and a third glue handle, which is inserted and connected between the connection point of the resistor and the capacitor and the other end of the switch; 2
A control device for a non-commutator motor generator, comprising a circuit comprising a resistor, a third resistor connected in parallel to the pre-excitation field winding, and the field winding set.