JPH10172844A - Contactless power supply for mobile objects - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform rational feeding in the case where non-contact feeding is applied to a movable body through electromagnetic inductance. SOLUTION: Pick-up units 4A, 4B and 4C which are composed of a pick-up part and a rectifying part respectively are mounted to a travelling truck 2, and they are arranged so that induced electromotive force may be generated simultaneously in every pick-up parts according to high-frequency electric power flowing in a transmission line 3 which is arranged on a mono-rail 1. Then, an electric power conversion unit 5, is connected with the pick-up units 4A, 4B and 4C and a load is connected to the output side of the unit 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact power supply apparatus for a mobile body, which supplies power to a mobile body moving on a track such as a monorail by electromagnetic induction.

[0002]

2. Description of the Related Art Conventionally, there have been known various power supply devices for supplying electric power from an external source to a moving body such as a traveling truck for transporting articles that travels along an elevated monorail (hereinafter, abbreviated as a rail). In particular, a non-contact power supply device as disclosed in, for example, Japanese Patent Application Laid-Open No. 5-207606 has been proposed as a device capable of preventing generation of dust or sparks due to wear at a sliding contact portion. I have.

In this device, a power transmission line is arranged along a rail track on which a moving body travels, and the transmission line is connected to a power supply device having an inverter so that a high-frequency current flows through the power transmission line. The moving body is provided with a power receiving device including a pickup unit having a power receiving coil, a rectifying unit connected to the coil, and a power converting unit connected to the rectifying unit and adjusting the output to a predetermined voltage. In addition, an induced electromotive force corresponding to the high-frequency current flowing through the transmission line is generated in the pickup coil, and the power is supplied to the load via the rectifier and the power converter.

[0004]

In a conventional non-contact power feeding device of this type, usually, only one set of the power receiving device including the pickup unit, the rectifying unit, the power converting unit, and the like is provided on the moving body, and the power receiving device is provided on the load or the like. The specifications such as the length of the pickup unit are set so as to meet the required power.

[0005] However, when the load of the moving body to be applied is different, for example, when the moving body is a traveling trolley for article transport and is applied to various trolleys having different weights of the transported object, the comparison is made. In a very small power receiving device, there is a possibility that the power to be supplied to the load is insufficient. In order to avoid such a situation, it is necessary to set the length of the pickup unit or the like in advance so as to correspond to the object requiring the largest power. When applied, the power receiving device becomes unnecessarily large,
There is waste in the pickup section.

Further, for example, in a case where the present invention is applied to a transport vehicle traveling along a monorail, if the pickup portion is long, the pickup portion interferes with the rail when the transport vehicle passes a curved track portion of the monorail. It becomes easy to come in contact with the power transmission line arranged along the rail, and this is a constraint when trying to reduce the radius of curvature of the curved track.

Therefore, it is conceivable to divide the pickup unit of the power receiving device into a plurality of parts and increase or decrease the number according to required power. However, when a plurality of pickup units are provided as described above, providing the same number of power conversion units as the number of pickup units is disadvantageous in terms of compactness and cost.

Japanese Patent Application Laid-Open No. 6-165301 discloses that a guide line (transmission line) is laid while rotating the phase by 90 degrees between a horizontal traveling portion and a vertical traveling portion of a moving path of a moving body. The body is provided with two pickup units whose positions and directions are different according to the laying phase of the guide line, and one pickup unit and the guide line correspond to each other in the horizontal traveling unit, and the other pickup unit in the vertical traveling unit. There has been proposed a non-contact power supply device in which a power supply and a guide line correspond to each other. However, in this device, only one of the two pickup units corresponds to the guide line depending on whether the vehicle is in a horizontal traveling section or a vertical traveling section. Cannot be performed, and this does not solve the above problem.

[0009] The present invention solves the above problems,
It is an object of the present invention to provide a non-contact power feeding device capable of rationally feeding power to a moving body.

[0010]

According to the present invention, a power transmission line for flowing a high-frequency current is arranged along a track, and a moving unit moving on the track has a pickup unit having a power receiving coil, A rectifier connected to the rectifier, a power converter connected to the rectifier to adjust its output to a predetermined voltage, and a load connected to the output side of the power converter. In the above, a plurality of pickup units each including the pickup unit and the rectifying unit are provided on the moving body, and each of the pickup units is configured such that induced electromotive force is simultaneously generated in each of the pickup units according to high-frequency power flowing through the transmission line. And the power conversion unit and the load are connected to these pickup units.

According to this configuration, the power that can be supplied is adjusted by increasing or decreasing the number of the pickup units, and adjustment according to the power consumed by the moving body or the like becomes possible.
Further, since the pickup unit is divided into a plurality of parts, it is advantageous in a case where the moving body moves on a curved track.

In particular, a moving body is constituted by a traveling vehicle that moves along a track composed of a monorail, and the traveling vehicle is provided with a plurality of frames that can swing and displace relative to each other, and the plurality of frames respectively contact the monorail. A configuration in which the rollers are in contact with each other, and the respective frames relatively swing when the traveling vehicle passes through the curved track portion of the monorail, and the pickup unit is disposed on each of the frames. preferable. With this configuration, when the traveling bogie passes through the curved track portion, the respective frames relatively swing, so that each frame immediately responds to the curved track portion, and the pickup unit disposed on each frame. Is displaced so as to respond immediately to the transmission line along the curved track portion, and it is possible to prevent the pickup unit from interfering with the monorail or coming into contact with the transmission line even in the curved track portion.

In the apparatus of the present invention, by connecting the pickup unit to the power conversion unit and the load so as to be addable, if the power required due to a change in the applied moving body or the like increases, the pickup unit is connected to the power conversion unit and the load. The number of pickup units is increased accordingly.

In the apparatus of the present invention, if a plurality of pickup units are connected to a single power converter common to these units, the power converter and the like can be kept compact.

Alternatively, a motor for driving a moving body and a control device are provided as loads, a first power converter for supplying a current to the motor via an inverter, and a second power supply for supplying a constant voltage to the control device. And a power conversion unit of
A configuration may be adopted in which some of the plurality of pickup units are connected to the second power conversion unit and other pickup units are connected to the first power conversion unit. Power required for driving the motor is supplied from the first power conversion unit via the inverter, and a constant voltage suitable for control is supplied to the control device from the second power conversion unit.

[0016]

Embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 schematically show a contactless power supply apparatus according to an embodiment of the present invention. In the illustrated example, the present invention is applied to a monorail type transport system, and the monorail type transport system includes a track composed of a monorail 1 and a moving body composed of a traveling vehicle 2 traveling along the rail 1. ing. A power transmission line 3 is disposed on the side surface of the rail 1 along the rail 1.
Is connected to a power supply (not shown) so that a high-frequency current flows from the power supply.

The traveling vehicle 2 is equipped with a plurality of (three in the example of FIG. 1) pickup units 4A, 4B, 4C, a power conversion unit 5, a motor 6 as a load, and a control device 7, and The motor 6 is connected to the output side of the power conversion unit 5 via the inverter 8.

Each of the pickup units 4A, 4B,
Reference numeral 4C denotes a pickup unit 10 including a pickup coil 11 for receiving power and a core member 12, which will be described later, and a capacitor 1 connected in parallel with the coil to form a resonance circuit.
3 and a rectifying unit composed of four diodes 14,
An induced electromotive force is generated in the pickup coil 11 according to the high-frequency current flowing through the transmission line 3, and this is rectified by the diode 14. Each of the pickup units 4A, 4B, and 4C is connected to the input side of the power conversion unit 5 in parallel with each other.

The power conversion unit 5 includes a choke coil 15, a switching element 16 such as an output adjusting transistor, and a logic circuit 17 for controlling the switching element 16 according to the element voltage V1 and the output voltage V2. ,
It includes a diode 18 and a smoothing capacitor 19 constituting a filter, and outputs a predetermined DC voltage.

A motor 6 is connected to an output side of the power conversion unit 5 via an inverter 8 and a CP
When a control device 7 made of U or the like is connected, AC power converted by the inverter 8 is supplied to the motor 6 and a predetermined voltage is supplied to the control device 7. The control device 7 controls the current and the voltage supplied to the motor 6 by controlling the inverter 8, and also performs various controls such as the control of an electromagnetic clutch and an electromagnetic brake described later. ing.

FIGS. 3 to 7 show specific structures of the rail 1 and the traveling vehicle 2. Traveling trolley 2 shown in these figures
Has a plurality of frames capable of swinging displacement with respect to each other. Specifically, a bogie main body frame 21 and a movable frame 2 which is swingably supported on the frame 21 via a support shaft 24.
2 and 23. These frames 21 and
Side rollers 25, 26, 27 that contact the rail 1 are disposed on the rails 2, 23, respectively, and under rollers 28, 29 that contact the lower surface of the rail 1 are provided with the movable frame 2.
2, 23. When the traveling vehicle 2 passes through the curved track portion of the rail 1, each of the rollers 25
The movable frames 22 and 23 are configured to swing and displace with respect to the bogie main body frame 21 while maintaining a state where the movable frames 22 to 29 contact the rail 1. Each of the frames 21 and 2
Each of the pickup units 2 and 23 is provided with a pickup unit.

The structures of the rail and the traveling carriage will be described in more detail.

The rail 1 is formed to have an I-shaped cross section having a vertical wall 1a and horizontal rails 1b and 1c at its upper and lower ends, and is suspended via a support arm 31 on the ceiling of an assembly line in a factory. Supported. On one side of the vertical wall 1a of the rail 1, a power transmission line 3 extending along the rail 1 in two rows in parallel is attached via a stay 32. The pickup unit 10 of each of the pickup units 4A, 4B, and 4C includes a core member 12 having a substantially E-shaped cross section,
Pickup coil 11 wound around the central projecting portion
And arranged so as to correspond to the transmission line 3.

At the lower part of the traveling carriage 2, a handling mechanism 33 for transferring a load is suspended and supported. The handling mechanism 33 has a structure capable of holding, transferring, and the like of a load, and is moved up and down by a hoisting mechanism, which will be described later, whereby operations such as loading and unloading of the load are performed.

On the bogie main body frame 21 of the traveling bogie 2, a motor 6 serving both as a driving source for traveling and a driving source for elevating the handling means is mounted, and is driven by the motor 6 to rotate the rail 1. A moving drive wheel 35 is provided. The drive wheel 35 is interposed between the rails 1b and 1c on the side (right side in FIG. 4) different from the side on which the power transmission line is arranged with the vertical wall 1a interposed therebetween, and rolls on the lower rail 1c. It has become.

In the traveling vehicle 2, the driving wheels 35
Has a drive shaft 36 protruding toward the side of the rail 1 (the right side in FIG. 2). The drive shaft 36 is rotatably supported by the bogie body frame 5 of the traveling vehicle 2. A timing pulley 37 is rotatably arranged on 36 and a traveling clutch 38 composed of an electromagnetic clutch is arranged.

On the other hand, the motor 6 is attached to the bogie body frame 21 at a lower portion of the drive shaft 36. An output shaft 41 protrudes from the motor 6 in a direction orthogonal to the drive shaft 36, and a tip of the output shaft 41 is rotatably supported by the bogie body frame 21 and is parallel to the drive shaft 36. Bevel gear 4 at the tip of 42
They are connected via 3a and 43b.

On the drive shaft 42, a timing pulley 44
, And a timing belt 45 is mounted over the timing pulley 44 and the timing pulley 37 of the drive shaft 36. The drive shaft 4
A lifting clutch 46 composed of an electromagnetic clutch is disposed on the side of the timing pulley 44 (right side in FIG. 2), and a hoisting mechanism 50A, 50B to be described later.
Pulley 47 for transmission to the motor is rotatably arranged.

In the traveling vehicle 2, the power of the motor 6 is transmitted via the drive shaft 42, the timing pulley 44, the timing belt 45, the timing pulley 37, and the drive shaft 36 while the traveling clutch 38 is ON. It is transmitted to the drive wheels 35 and the lifting clutch 46
In the state of N, the power of the motor 6 is supplied via the drive shaft 42 and the timing pulley 47 to the winding mechanisms 50A, 50
B.

A pair of hoisting mechanisms 50A and 50B are provided on both front and rear sides of the traveling vehicle 2, respectively.
Each of the hoisting mechanisms 50A and 50B includes a pair of drums 51 disposed on both sides of the bogie main body frame 21, respectively.
A, 51B, and belts 52A, 52B derived from these drums 51A, 51B are used as guide rollers 53.
A and 53B are connected to the frame of the handling mechanism 33.

The drums 51A and 51B are fixed to both sides of drum support shafts 54A and 54B rotatably supported by the bogie body frame 21, respectively.
A and a timing pulley 55 near one end of 54B, respectively.
A, 55B are mounted, and tension pulleys 55A, 55B supported by the bogie body frame 21 are provided on both sides of the drive shaft 42, and the timing pulley 55
A timing belt 57 is attached between A and 55B and the timing pulley 47.

The traveling carriage 2 has rollers 26 to
29 and a pair of movable frames 22, 23 to which the pickup units 4B, 4C and the like are assembled are arranged symmetrically in the front-rear direction, and biasing mechanisms 65A, 65B for biasing the movable frames 22, 23 to the neutral position are provided. Have been.

The movable frame 22 is composed of a main body 22a to be attached to the support shaft 24 and a pair of parallel arms 2 extending forward (left side in FIG. 7) from the main body 22a.
2b and a substantially Y-shape in plan view. Attachment plates 60 are fixed to the outer sides (upper and lower outer sides in FIG. 7) of each of the arms 22b, and the side rollers 26 are rotatably attached to these attachment plates 60 via vertical support shafts 61, respectively. Attach plate 6 to one arm 22b
2 is fixed, and a horizontal support shaft 63 is attached to the mounting plate 62.
, An under roller 28 is rotatably mounted. The side roller 26 and the under roller 28A are in contact with both outer side surfaces and the lower surface of the lower rail portion 1c of the rail 1.

The movable frame 23 is also substantially Y-shaped in plan view having a main body 23a and a pair of arms 23b, and is attached to the arms 23b via mounting plates 60 and 62 and supporting shafts 61 and 63. The roller 27 and the under roller 29 are rotatably mounted, and the side roller 27 and the under roller 29 are in contact with both outer surfaces and the lower surface of the lower rail portion 1c.

Each of the urging mechanisms 65A and 65B has a lever 66, and the lever 66 is connected to a vertical support shaft 67 fixed to the bogie body frame 21 on the lower surface of the traveling bogie 2 via a bearing. It is mounted rotatably. A vertical support shaft 68 is fixed to the end (lower end in FIG. 5) of the lever 66 with the support shaft 67 interposed therebetween. A roller 69 is rotatably mounted on the support shaft 68. A shaft 70 is fixed to the rear end of the lever 66. One end of a compression coil spring 71 is mounted on the shaft 70, and the other end of the compression coil spring 71 is fixed to the bogie body frame 21. ing. And
In the biasing mechanism 65A (left side in FIG. 7), the lever 66 is biased counterclockwise by the elastic force of the compression coil spring 71 to press the roller 69 against the movable frame 22. In the other urging mechanism 65B (right side in FIG. 7), the lever 66 is urged clockwise by the elastic force of the compression coil spring 71 to press the roller 69 against the movable frame 22.

In the movable frames 22 and 23, a concave portion 72 is formed at a position where the roller 69 comes into contact with the roller 69, and the outer edge of the roller 69 is formed by pressing the lever 66 as described above. To be fitted.

That is, the traveling vehicle is the side roller 2
5, 26 and 27 and the under rollers 28 and 29 travel while being guided along the rail 1. In particular, in the R track (curved track portion on the circular arc), the movable frames 22 and 23 respectively correspond to the curvature of the rail 1. By swinging around the support shaft 24, each of the under rollers 28, 29
And a biasing mechanism 65A,
Since the movable frames 22 and 23 are urged by 65B in a direction in which the movable frames 22 and 23 are in a neutral state (a state in which the movable frames 22 and 23 are arranged in a straight line), unnecessary vibration of the movable frames 22 and 23 is prevented.

In the movable frames 22 and 23, one mounting plate 60 for mounting the side rollers 26 and 27 is provided.
The upper mounting plate 60 in FIG. 7 is extended upward as shown in FIG. 2, and the pickup unit 10 is mounted on this extended portion via a bracket 73.

A pair of auxiliary rollers 74 rotatable about a vertical axis are provided on both sides of the rail 1 at the front and rear ends of the traveling vehicle 2. The auxiliary roller 74 does not come into contact with the rail 1 when the traveling vehicle 2 is traveling on a straight track, and only when the traveling vehicle 2 travels on an R track having a predetermined curvature, is the center of curvature of the rail 1 ( An auxiliary roller 74 (in the radial direction) is provided so as to contact the rail 1.

In FIG. 3, reference numeral 75 denotes a control box, in which the control device is housed. Reference numeral 76 denotes a vacuum pump fixed to the side of the traveling vehicle 2 so that the vacuum pump 76 generates a negative pressure and supplies the negative pressure into the traveling vehicle 2 via a supply pipe 77. Has become. That is, in the present embodiment, the hoisting mechanisms 50A, 5A
0B, drive mechanisms such as the timing pulleys 37, 44, 47, the traveling clutch 38, and the elevating clutch 46 are disposed in a substantially closed space formed by the bogie body frame 21, and the negative pressure is applied to the space. When supplied, foreign substances such as dust generated in the drive mechanism are sucked and collected.

According to the monorail transfer system configured as described above, the movable frames 22 and 23 swing in accordance with the curvature of the rail 1 on the R track of the rail 1 as described above. , 29 are directed in directions corresponding to the curvature of the rail 1, so that the undercarriors 28, 29 and the drive wheels 35 can be suppressed from skidding on the R track so that the traveling vehicle 2 can travel smoothly. Therefore, as compared with a conventional monorail type transport system of this type, in which side rollers and under rollers are fixedly provided on the frame of the traveling vehicle to guide the traveling vehicle along the rails, the traveling vehicle 2 is extremely smooth. In addition to running along the rail 1, the generation of dust and abnormal noise due to the under-roller, the side slip of the drive wheel, and the like can be effectively suppressed.

Further, a transmission line 3 disposed along the rail 1 and connected to a power supply (not shown) with respect to the traveling vehicle 2.
And a pickup unit 4 provided on the traveling vehicle 2
A, 4B, 4C and the power conversion unit 5 perform non-contact power supply. That is, as the high-frequency current flows through the transmission line 3, the pickup units 4A, 4B, 4C
An induced electromotive force is generated in each of the pickup units 10, and a current is supplied to the motor 6 and the like via the rectifying unit and the power conversion unit 5.

In this case, the pickup unit including the pickup unit 10 and the rectification unit is divided into a plurality (three in this embodiment), and these units 4A, 4B, 4
Since the induced electromotive force is generated simultaneously in each of the pickup units 10 of C, necessary power is secured while the length of each pickup unit 10 in the transmission line direction (direction in which the rail extends) is shortened. Moreover, since one power conversion unit 5 is provided for the plurality of pickup units 4A, 4B, and 4C, the entire power receiving device becomes compact.

Each of the pickup units 4A, 4B, and 4C is provided on a plurality of frames 21, 22, and 23 that can swing relative to each other in the traveling vehicle 2, so that when the traveling vehicle 2 passes through the R track. Each of the pickup units 10 of the pickup units 4A, 4B, 4C also swings and displaces each other so as to immediately follow the R track, so that the pickup unit 10 is prevented from interfering with the rail 1 or coming into contact with the transmission line 3. You.

As described above, since the plurality of frames of the traveling carriage 2 and the pickup units 10 provided on the respective frames are relatively displaced in accordance with the curvature of the rail 1, compared with a conventional monorail type transport system of this type. Thus, the traveling vehicle 2 can travel along the R trajectory having a smaller radius of curvature. Therefore, there is an advantage that the degree of freedom in installing the monorail track can be increased.

As will be described later, when the required power of the traveling vehicle changes, if the number of pickup units 4A, 4B, 4C is increased or decreased accordingly, the current that can be supplied to meet the required power can be obtained. Can be adjusted, and there is no need to provide an unnecessarily large pickup unit.

By the way, the pickup unit 4
The pickup unit 10 in each of A, 4B, and 4C has, for example, a structure as shown in FIG. That is,
The core member 12 of the pickup unit 10 is made of a magnetic material such as ferrite, and has a cross section including a vertical substrate portion, and both side protruding portions 122 and a central protruding portion 121 protruding toward the monorail from upper and lower side portions and a central portion thereof. The pickup coil 11 is formed in a substantially E shape, and the pickup coil 11 is wound around the center projecting portion 121. The positional relationship between the pickup unit 10 and the transmission line 3 is set such that the transmission line 3 passes through a space between the center projecting portion 121 and the upper and lower side projecting portions 122 of the core member 12. Also, a projection 1 projecting upward and downward on both ends of the center projecting portion 121 is provided.
21a is provided, and a protruding portion 122a protruding toward the center side is provided at the tip of the upper and lower both protruding portions 122.

In the case of such a structure, the clearance between the stay 32 supporting the transmission line 3 and the pickup coil 11 is a, the clearance between the stay 32 and the inner surface of the upper and lower projecting portions 122 of the core member 12 is b, and the gap is The length of the facing portion is c,
2 is d, and the tip projection 121a of the central projection 121 is
The thickness of e, the tip projection 12
Assuming that the thickness of 2a is f, it is preferable that c> f to reduce the magnetic resistance of the air gap and increase the power supply efficiency. Further, in order to allow a margin for relative displacement between the transmission line 3 and the pickup unit 10, the clearances a and b are made substantially equal, and the stay 32 is
It is desirable to arrange so as to be located substantially at the center.

The pickup section 10 may have a structure as shown in FIG. Pickup unit 10 shown in FIG.
Also includes a core member 12 and a pickup coil 11, and the core member 12 is formed by a vertical substrate portion and a central projecting portion 12.
1 and a substantially E-shaped cross section having upper and lower projecting portions 124, and a pickup coil 1
1 is wound. Center protruding portion 12 of core member 12
1 has the same shape as that shown in FIG.

The upper and lower sides projecting portions 12 of the core member 12
4 has a shape which is narrowed toward the center side as it approaches the front end side, and has a portion 124 within a predetermined range of the front end.
“a” faces in parallel with the tip projection 121a of the central projection 121 and forms a predetermined air gap.

According to such a structure, the power supply efficiency is improved by reducing the magnetic resistance of the air gap, and
In order to allow the stay 32 and the core member 12 to be inserted and removed, the transmission line 3 and the stay 32 are allowed to pass through the air gap portion, while the upper and lower both sides 1
By making the 24 tapered, the space in the height direction can be reduced. That is, the pickup unit 10 is disposed in a space between the upper and lower rail portions 1b and 1c of the I-shaped cross section rail 1, but the upper and lower wall surfaces of the core member 12 and the upper and lower rail portions 1b and 1c depend on the shape of the core member 12. The vertical width of the rail 1 can be reduced while securing a predetermined clearance therebetween, and the monorail transport system can be made compact.

In the above-described embodiment, the frames 21, 21 on which the pickup units 4A, 4B, 4C are provided are provided.
As a structure for connecting the members 2 and 23 to each other so as to be swingable,
The movable frames 22, 23 with respect to the carriage body frame 21
Are two-dimensionally swingable via the support shaft 24, but the frames may be connected via a flexible joint or the like so as to be three-dimensionally swingably displaceable.
With this configuration, the frame and the pickup unit can swing and displace in accordance with the orbit when passing not only a horizontal R orbit but also a vertical R orbit that forms an uphill or a downhill. Become.

In the above embodiment, three pickup units are provided on the traveling vehicle. However, the number of pickup units can be changed as necessary. For example, as shown in FIG. Pickup units 4A to 4E can be provided. in this case,
The movable frame 22 of the traveling vehicle 2 as in the above embodiment,
23, a movable frame which can be swung relative thereto is added to each side, and a pickup unit 4 is provided on each frame.
A to 4E may be provided.

There are various ways of connecting the pickup units 4A to 4E to the power conversion unit 5. In the example shown in FIG. 10, the pickup units 4A to 4E are derived from the three pickup units 4A, 4B and 4D via the connector 82. The connected electric wires 83 are connected to each other via a connection portion 84, and the electric wire 83 passing through the connection portion 84 is connected to the input portion 81 of the power conversion unit 5. In addition, the electric wires 83 led out from the other pickup units 4C and 4D via the connectors 82 are individually connected to the power conversion unit 5.
Is connected to the input unit 81 of the. The connector 82 is detachable so that a part of the pickup unit can be removed if not necessary. Further, the connection portion 84 may be detachable.

In the above embodiment, one power conversion unit is used for a plurality of pickup units. However, as shown in FIG. 11, two power conversion units 5X and 5X are used for a motor and a control device. 5Y may be provided. That is, in the embodiment shown in this figure, the first and second power conversion units 5Y and 5X are provided for the three pickup units 4A, 4B and 4C, and are provided on the output side of the first power conversion unit 5Y. While the motor 6 is connected via the inverter 8, the control device 7 is connected to the output side of the second power conversion unit 5X. One pickup unit 4C is connected to the input side of the second power conversion unit 5X, and the first power conversion unit 5X
The remaining plural (two) pickup units 4 in Y
A and 4B are connected.

According to this embodiment, the power supply to the motor 6 and the voltage supply to the control device 7 are rationally performed. That is, it is necessary to supply a relatively large current to the motor 6. The rotation speed of the motor 6 is determined by the voltage, the torque is determined by the current, and the product of the rotation speed and the torque is the output of the motor. At low speed operation, the torque is constant (output is proportional to the rotation speed). In many cases, the operation is constant (the torque decreases as the rotation speed increases). For such an operation, the motor 6 includes a plurality of pickup units 4.
Power is supplied from the first power conversion unit 5Y connected to the inverters A and 4B via the inverter 8, and the motor is controlled in accordance with the operation state by a control signal (gate signal) supplied from the control device 7 to the inverter 8. The current and voltage supplied to 6 are controlled.

On the other hand, the power supplied to the control device 7 may be small, but it is necessary to supply a constant voltage. Therefore, a predetermined voltage is supplied to the control device 7 from the second power conversion unit 5X connected to one pickup unit 4C.

[0059]

As described above, according to the present invention, in the non-contact power feeding device, a plurality of pickup units each including a pickup unit and a rectification unit are provided on a moving body, and each of the pickup units is provided in accordance with high-frequency power flowing through a transmission line. Since the induced electromotive force is generated at the same time, the power that can be supplied can be adjusted by increasing or decreasing the number of pickup units, without unnecessarily increasing the size of the pickup unit.
Power can be supplied as required. Also,
By the pickup part being divided into a plurality,
This is also advantageous when the moving body moves on a curved trajectory.

In particular, when a moving body is constituted by a traveling vehicle that moves along a track composed of a monorail, the traveling vehicle is provided with a plurality of frames that can swing and displace each other.
When the pickup unit is arranged on each frame, when the traveling vehicle passes through the curved track portion, each pickup unit is rocked and displaced so as to respond to the curved track portion together with each frame, and the pickup is also picked up on the curved track portion. It is possible to prevent the unit from interfering with the monorail or coming into contact with the transmission line. For this reason,
The radius of curvature of the curved track portion can be reduced, and the degree of freedom in designing the monorail can be increased.

Further, in the apparatus of the present invention, a motor for driving a moving body and a control device are provided as loads, a first power conversion section for supplying a current to the motor via an inverter, and a constant power supply for the control device. Second to supply voltage
When a configuration is adopted in which some of the plurality of pickup units are connected to the second power conversion unit and the other pickup units are connected to the first power conversion unit. Power supply to the motor and voltage supply to the control device can be performed rationally.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a contactless power supply device according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of the device.

FIG. 3 is a schematic front view showing an example of a monorail transport system to which the apparatus of the present invention is applied.

FIG. 4 is a vertical sectional side view of a rail and a traveling vehicle in the monorail transport system.

FIG. 5 is a horizontal sectional view of the traveling vehicle.

FIG. 6 is a schematic view of a hoisting mechanism for lifting.

FIG. 7 is a schematic plan view showing a traveling state of a traveling vehicle.

FIG. 8 is a side view showing the structure of the pickup unit.

FIG. 9 is a side view showing another example of the pickup unit.

FIG. 10 is an explanatory diagram of a circuit configuration showing another embodiment of the device of the present invention.

FIG. 11 is a schematic front view showing still another embodiment of the device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rail 2 Traveling trolley 3 Transmission line 4A, 4B, 4C Pickup unit 5 Power conversion unit 6 Motor 7 Control device 8 Inverter 10 Pickup part 11 Coil 12 Core member 21, 22, 23 Frame 25-29 Roller

Claims (5)

[Claims] A power transmission line for flowing a high-frequency current is disposed along a track, and a moving body moving on the track includes a pickup unit having a power receiving coil, a rectifying unit connected to the coil, In the non-contact power feeding device of a mobile body provided with a power converter connected to the rectifier and adjusting the output to a predetermined voltage, and a load connected to an output side of the power converter, the pickup unit and the rectifier A plurality of pickup units each comprising: a plurality of pickup units, each of which is arranged so that induced electromotive force is simultaneously generated in each of the pickup units in accordance with high-frequency power flowing through the transmission line. A non-contact power supply device for a mobile object, wherein the power conversion unit and the load are connected to a pickup unit. 2. A moving body is constituted by a traveling vehicle moving along a track composed of a monorail, and the traveling vehicle is provided with a plurality of frames capable of swinging displacement with respect to each other. A configuration in which the respective frames are relatively swung when the traveling vehicle passes through the curved track portion of the monorail, and the pickup unit is disposed in each of the frames. The contactless power supply device for a moving body according to claim 1. 3. The non-contact power supply device for a moving body according to claim 1, wherein the pickup unit is connected to a power conversion unit and a load so as to be addable. 4. The non-contact power supply device for a mobile unit according to claim 1, wherein a plurality of pickup units are connected to a single power conversion unit common to the plurality of pickup units. 5. A motor for driving a moving body and a control device as loads, a first power converter for supplying a current to the motor via an inverter, and a second power supply for supplying a constant voltage to the control device. A plurality of pickup units are connected, a part of the plurality of pickup units is connected to the second power conversion unit, and the other pickup units are connected to the first power conversion unit. A non-contact power supply device for a mobile object according to claim 1.