JPH07227004A - Non-contacting power feeding facility - Google Patents

Abstract

PURPOSE:To provide a non-contacting power feeding facility that protects its power supply. CONSTITUTION:A pair of guiding lines 34 are installed along the moving line of a vehicle V so as to supply a high-frequency electric current through the lines 34 from a power supply M, and a pickup coil 36 is provided on the vehicle V so as to receive the electric power from the lines 34 in a non-contacting state. Then a resonance capacitor 55 is connected to the starting ends of the lines 34 and capacitors 57 are connected in parallel with the lines 34 at prescribed intervals, with both ends of adjacent capacitors 57 being connected to each other through zero-impedance cables 58. The cables 58 are not laid between the capacitor 55 and the capacitor 57 in the first stage. As a result, the high-frequency pulse-like current generated by the power unit M is prevented from returning to the unit M after flowing through a whole circuit, because the pulse-like current is blocked by the inductance of guiding lines 36 in the first stage. Therefor, damage to the power unit M can be prevented and the loss of the unit M can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contactless power feeding facility for a mobile body.

[0002]

2. Description of the Related Art Recently, as a power supply equipment for a mobile body, an induction line for flowing a high frequency current is laid along the mobile line of the mobile body, and an electromotive force is generated in the mobile body by a magnetic flux generated in the induction line. Equipment for installing a pickup coil for rectifying an AC current generated by this electromotive force and supplying the rectified AC current to a battery or an inverter has been installed.

In such equipment, when the laying distance of the induction line becomes long, the current and voltage flowing due to the inductance of the induction line are reduced, and a problem arises in that sufficient electromotive force cannot be generated in the pickup coil of the moving body. .

In order to solve this problem, as shown in FIG. 8, a plurality of capacitors 3 are connected in parallel between a pair of dielectric lines 1 and a predetermined impedance is maintained between both ends of adjacent capacitors 3. The cables 4 are connected to each other so that, for example, 1000 V is generated between the guide lines 1 at predetermined intervals.

The power supply device 2 includes a DC power supply 11 and an inverter.
12 and a capacitor forming a parallel resonance circuit with the induction line 1.
The inverter 12 consists of a coil 14 for current limiting.
And transistors 15 and 16 and a coil 17 for supplying current connected to the transistors 15 and 16. The transistor control device is omitted.

[0006]

However, in such a conventional non-contact power supply equipment for a moving body, the transistors 15 and 16 of the inverter 12 usually have a voltage of 0 across the capacitor 13.
When they reach V, they are alternately switched (0V switching), but due to the delay of this switching operation,
Further, since the capacitors 3 and 13 of the entire circuit are coupled through the zero impedance cable 4, a transient high frequency pulse current as shown in FIG. 9 is generated, and overcurrent and overvoltage are generated in the transistors 15 and 16. Then transistor
There was a problem that 15 and 16 could not be used, and there was a problem that the loss became large.

The present invention solves the above problems,
In addition to contactless, safe and stable power supply,
An object of the present invention is to provide a non-contact power feeding facility for a mobile body, which can protect a power supply device and reduce loss.

[0008]

In order to solve the above-mentioned problems, the contactless power feeding equipment of the first invention lays a pair of induction lines for flowing a high-frequency current from a power supply device along a moving line of a moving body. Connect a resonant capacitor to the beginning of the dielectric line,
A contactless power supply facility for a mobile object, wherein a coil is provided to the mobile object in a contactless manner from the dielectric line, wherein the pair of induction lines are connected at their ends with a capacitor, and a predetermined distance is provided between the pair of dielectric lines. It is characterized in that a plurality of capacitors are connected in parallel at intervals, and both ends of adjacent capacitors are short-circuited to each other except at one place.

The contactless power supply equipment of the second invention is the contactless power supply equipment of the first invention, wherein a short-circuit line between the resonance capacitor and the first-stage capacitor adjacent thereto is removed. It is a thing.

Further, in the contactless power feeding equipment of the third invention, a pair of induction lines for flowing a high-frequency current from the power supply device is laid along the moving line of the moving body, and a resonance capacitor is connected to the starting end of this dielectric line. A contactless power supply facility for a mobile body, wherein the mobile body is provided with a coil to which electric power is fed from the dielectric line in a contactless manner, wherein the ends of the pair of induction lines are connected by a capacitor, and A plurality of capacitors are connected in parallel at a predetermined interval, both ends of adjacent capacitors are short-circuited to each other, and a switch is provided on each of the two short-circuit lines of the first stage adjacent to the power supply device, and when the power supply device starts up. A control means for turning on the switch is provided.

The contactless power feeding equipment of the fourth invention is the contactless power feeding equipment of the third invention, wherein a frequency relay is provided in the guide line, and the control means controls the guideline by the frequency detection signal of the frequency relay. The switch is turned on when it is detected that the frequency deviates from a predetermined frequency.

[0012]

With the structure of the first aspect of the invention, the high frequency pulse current generated in the power supply device is blocked by the inductance of the induction line at one place excluding the short-circuit line, and is prevented from flowing through the entire circuit and returning to the power supply device. It

Further, according to the structure of the second invention, the high frequency pulse current generated in the power supply device is blocked by the inductance of the induction line excluding the first-stage short-circuit line adjacent to the resonance capacitor and flows through the entire circuit to supply the power. Returning to the device is prevented.

Further, according to the third aspect of the invention, when the switch is turned on at the rise of the power supply device and the whole circuit rises as a resonance circuit, and the induction line has a predetermined resonance frequency, the switch is pulled off. Therefore, the high frequency pulse current generated in the power supply device is blocked by the inductance of the first-stage induction line, and is prevented from flowing through the entire circuit and returning to the power supply device.

Further, according to the structure of the fourth invention, when the frequency of the induction line deviates from the predetermined frequency, the switch is turned on, the whole circuit becomes a resonance circuit and is returned to the predetermined resonance frequency, and the frequency of the induction line becomes the predetermined frequency. When returning to the frequency, the switch is tripped.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 2 and 3, the transport vehicle body V as a moving body includes a drive trolley 21A and a driven trolley 21A.
B and a guide rail B which is composed of an article conveying carrier 21C supported by these trolleys 21A and 21B and which guides the vehicle body V movably.

The drive trolley 21A is provided with a traveling wheel 22 that engages with the upper portion of the guide rail B, a steadying roller 23 that contacts the lower portion of the guide rail B from both lateral sides, and a pickup unit P. Is an electric motor with a reducer 24
Driven by. Further, the driven trolley 21B includes a traveling wheel 25 that engages with an upper portion of the guide rail B, and the guide rail B.
An anti-sway roller 26, which comes into contact with both lateral sides, is provided at the lower part of the.

The guide rail B has a wheel guide portion 2 on its upper portion.
7. A roller guide portion 28 is provided at the lower portion of the guide rail B, which is supported by a support frame 29 connected to one lateral side in a suspended state from the ceiling or the like, and a side portion to which the support frame 29 of the guide rail B is attached. The guide line unit X is attached to the other side portion.

The guide line unit X is provided with a bracket 32 on which a pair of upper and lower hangers 31 are vertically projected at a predetermined interval along one side of the guide rail B. The bracket 32 is enlarged in FIG. As shown in the figure, a bag-shaped recess 31A is provided at the tip of the hanger 31, the start end is connected to the power supply M, and the end is connected to the recess 31A. The claw portion 33A of the cover 33 fitted in the longitudinal direction is inserted, and the guide line 34 is laid along the guide rail B. As shown in FIG. 4, the bracket 32 has its upper and lower end portions fitted to the claw portions 27A and 28A which are provided inwardly from the wheel guide portion 27 and the roller guide portion 28 of the guide rail B, respectively.
Align the set screw 32B with the screw hole 32A provided at the upper and lower ends,
The guide rail B is fixed by making its tip bite into the guide rail B. The induction line 34 is a stranded wire (hereinafter referred to as Litz wire) formed by collecting insulated thin wires as an insulator,
For example, it is configured by being covered with a resin material.

As shown in FIG. 5, the pickup unit P has five ferrites 35 each having an E-shaped cross section, and a central convex portion 35A thereof is oriented horizontally (in a direction along the guide rail B in FIG. 2). ), A ferrite plate 37 is placed on the convex portion 35A at the center of each ferrite 35, and the ferrite plate 37 and the ferrite plate 37 are fixed to the base body 39 by screws 39A via a plate 38 made of a non-magnetic material. Also, for example, 10
~ 20 turns of the above litz wire and pick up coil
36 is formed, and a mounting member 40 is mounted on the side portion of the base body 39. Further, urethane rubber 40A is inserted between the folded portions of the ferrite 35 and the plate 38 at both ends. The mounting member 40 allows the pickup unit P to be moved to the pickup unit P as shown in FIG.
The center L of the convex portion 35A at the center of the ferrite 35 is fixed to the vehicle body V by adjusting so that it is located substantially at the center of the pair of guide lines 34 of the guide line unit X and perpendicular to the guide rail B. . When the induction line 34 is energized (alternating current), an electromotive force is generated in the pickup coil 36.

Further, as shown in FIGS. 3 and 4, on the lateral side of the guide rail B where the guide line unit X is not provided, a capacitor 57 to be described later and a zero impedance
A cable 58 is provided.

The circuit configuration of the power supply device M and the vehicle body (moving body) V will be described with reference to the circuit diagram of FIG. First, the power supply device M will be described.

A converter 42 is connected to an AC 200 V three-phase AC power supply 41, and a sine wave resonance inverter 43, an overcurrent protection transistor 44 and a diode 45 are connected to the converter 42. The converter 42 includes a diode 46 for full-wave rectification, a coil 47 that forms a filter, a capacitor 48, a resistor 49, and a transistor 50 that short-circuits the resistor 49.
The sine wave resonance inverter 43 is connected to the transistors 51 and 52 driven by the rectangular wave signals alternately oscillated as shown in the figure, the current limiting coil 53, and the transistors 51 and 52. And a coil 54 for supplying current. In this inverter 43, the induction line 34,
A capacitor 55 that forms a parallel resonant circuit with the induction line 34.
Are connected. The transistor control device is omitted.

A capacitor 57 is connected to the pair of inductive lines 34 laid on the guide rail B at the end thereof, and a capacitor 57 is connected in parallel between the inductive lines 34 at every predetermined distance so that adjacent capacitors are connected. 57 is zero between both ends
Shorted by impedance cable 58. In addition,
No short-circuit line (zero impedance cable 58) is provided between the resonance capacitor 55 and the adjacent first-stage capacitor 57.

Further, the vehicle body V is provided in parallel with the pickup coil 36, and is provided with a capacitor 62 which constitutes a resonance circuit resonating at the frequencies of the pickup coil 36 and the induction line 34. diode
63, and a stabilized power supply circuit 64 for controlling the output to a predetermined voltage is connected to the diode 63.
Is connected to a motor 24 via a load, for example, an inverter 65. The stabilized power supply circuit 64 includes a current limiting coil 66, an output adjusting transistor 67, a diode 68 and a capacitor 69 which form a filter. The transistor control device is omitted.

The operation of the circuit configuration of the power supply device M, the guide line 34 and the vehicle body V will be described. First, the AC 200 V three-phase AC output from the AC power supply 41 is converted to DC by the converter 42, and the sine wave resonance inverter 43 generates a high frequency,
For example, it is converted into a 10 kHz sine wave and supplied to the induction line 34. Further, the high frequency pulse current generated at the time of switching the transistors 51 and 52 is blocked by the inductance of the first-stage induction line 34 adjacent to the resonance capacitor 55, flows through the entire circuit, and is prevented from returning to the transistors 51 and 52. Has been done.

Due to the magnetic flux generated in the guide line 34, a large electromotive force is generated in the pickup coil 36 of the vehicle body V located on the guide rail B resonating at the frequency of the guide line 34, and the alternating current generated by the electromotive force is generated. Is a diode 63
Is rectified by the stabilized power supply circuit 64, regulated to a predetermined voltage by the stabilized power supply circuit 64, and supplied to the electric motor 24 with a speed reducer via the inverter 65. 22 is driven and guided by guide rail B to move.

In this way, power can be supplied to the vehicle body V without contact, so that abrasion and dust generation of the current-carrying rail L as in the conventional case can be eliminated, and maintenance-free can be realized. Further, the high frequency pulse current can be prevented from being fed back to the transistors 51 and 52, so that the transistors 51 and 52 can be prevented from being disabled and the loss can be reduced.

Further, the induction line 34 and the pickup coil 36
Use a litz wire covered with an insulator for the
By covering with 33, the conductive part is not exposed and safety can be improved. Moreover, since the spark is not removed, there is no danger of fire or the like, and it can be used in an explosion-proof area.

Incidentally, in this embodiment, the short-circuit line between the resonance capacitor 55 and the adjacent capacitor 57 is excluded, but FIG.
As shown in FIG. 7, the same effect can be expected by removing the short-circuit line between the other capacitors 57 in one place.

Another embodiment of the present invention will be described. In addition, in another embodiment, the circuit configuration of the power supply device M ′ is shown in FIG.
This is a modification of the embodiment of FIG. Descriptions of other configurations are omitted.

The circuit configuration of the power supply device M'will be described with reference to the circuit diagram of FIG. A frequency relay 56 is newly connected to the inductive line 34 in series, and a capacitor 57 is connected in parallel between the dielectric lines 34 having a predetermined length. A zero impedance cable 58 is provided between both ends of the capacitors 55 and 57. It is short-circuited, and these two short-circuit lines 58 are always open (OF
A switch 59 of F) is provided, and a switch control device 60 for this switch 59 is provided. This switch controller
The frequency detection signal of the frequency relay 56 is input to the circuit 60, and the switch 59 is turned on when the power supply device M is started up or when the frequency of the induction line 34 deviates from a predetermined resonance frequency by the frequency detection signal. The transistor control device 61 controls the transistors 44, 50, 51, 52,
When the transistors 51 and 52 are driven at high speed to turn on the power supply, a turn-on signal is output to the switch control device 60.

The operation of the circuit configuration of the power supply device M ', the guide line 34 and the vehicle body V will be described. First, the AC 200 V three-phase AC output from the AC power supply 41 is converted into DC by the converter 42, converted into a high frequency, for example, a 10 kHz sine wave by the sine wave resonance inverter 43, and supplied to the induction line 34. When the circuit is started by the inverter 43, the switch 59 is turned on by the switch control device 60, so that the entire circuit rises as a resonance circuit, and after a certain period of time, that is, when the induction line 34 reaches a predetermined resonance frequency, the switch 59 turns on. Be tripped. Therefore, the high frequency pulse current generated at the time of switching the transistors 51 and 52 thereafter is blocked by the inductance of the first-stage induction line 34, flows through the entire circuit, and is prevented from returning to the transistors 51 and 52.

Due to the magnetic flux generated in the guide line 34, a large electromotive force is generated in the pickup coil 36 of the vehicle body V located on the guide rail B resonating at the frequency of the guide line 34, and the alternating current generated by the electromotive force is generated. Is a diode 63
Is rectified by the stabilized power supply circuit 64, regulated to a predetermined voltage by the stabilized power supply circuit 64, and supplied to the electric motor 24 with a speed reducer via the inverter 65. 22 is driven and guided by guide rail B to move.

The frequency of the guide line 34 is the frequency relay.
It is monitored by 56, and when the frequency of the induction line 34 deviates from the predetermined frequency, the switch control device 60 turns on the switch 59, the entire circuit becomes a resonance circuit, and it is pulled back to the predetermined resonance frequency. When the frequency returns to the predetermined frequency, the switch 59 is tripped.

As described above, the power can be supplied to the vehicle body V without contact, and the switch 59 is turned on only when the circuit is started up and when the frequency is deviated, so that the high frequency pulse current is supplied to the transistors 51 and 52 in the normal state. It is possible to prevent feedback and prevent the transistors 51 and 52 from becoming unusable. Further, the frequency of the induction line 34 can be maintained at a predetermined resonance frequency, the electromotive force can be most efficiently induced in the pickup coil 36, and the power can be efficiently fed. Also, the loss can be reduced.

Although the vehicle body V that moves in the left-right direction is described in the above embodiment, the present invention can be similarly applied to a vehicle body (moving body) that moves in the vertical direction along the rail track, and the floor surface can be used. Can be similarly applied to a vehicle body that moves along a predetermined transport path, and the same effect can be expected.

[0038]

As described above, according to the first invention,
The high-frequency pulse current generated in the power supply is blocked by the inductance of the induction line at one place except the short-circuit line, so that it can be prevented from flowing to the entire power supply and returning to the power supply, preventing damage, and further reducing loss. Can be smaller.

Further, according to the second invention, the high frequency pulse current generated in the power supply device is adjacent to the resonance capacitor in the first capacitor.
Blocked by the inductance of the induction line excluding the short-circuited wire of the stage, it can be prevented from flowing through the entire circuit and returning to the power supply device, preventing damage, and further reducing loss.
In addition, since both ends of the adjacent capacitors of the induction line after the second stage are connected to each other by a zero impedance cable, a high voltage is generated between the induction lines at a predetermined interval, which is sufficient for the coil of the moving body. Can generate various electromotive force.

Further, according to the third aspect of the present invention, when the switch is turned on at the rise of the power supply device, the whole circuit rises as a resonance circuit, and when the induction line has a predetermined resonance frequency, the switch is pulled off. The high frequency pulse current generated in the power supply device is blocked by the inductance of the first-stage induction line, and can be prevented from flowing through the entire circuit and returning to the power supply device, preventing damage, and further reducing loss.

According to the fourth invention, when the frequency of the induction line deviates from the predetermined frequency, the switch is turned on, the entire circuit becomes a resonance circuit, and the resonance circuit is pulled back to the predetermined resonance frequency. Can be maintained at
The electromotive force can be most efficiently induced in the coil of the moving body, and power can be efficiently fed.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a contactless power feeding facility according to an embodiment of the present invention.

FIG. 2 is a side view of the contactless power supply equipment.

FIG. 3 is a partial cross-sectional front view of the contactless power feeding facility.

FIG. 4 is a side view and a plan view of a bracket of the contactless power feeding facility.

FIG. 5 is a plan view, front view, and side view of a pickup coil of the contactless power feeding facility.

FIG. 6 is a circuit configuration diagram in which a part of the contactless power feeding facility is modified.

FIG. 7 is a circuit configuration diagram of contactless power feeding equipment according to another embodiment of the present invention.

FIG. 8 is a circuit diagram of a main part of a conventional contactless power feeding facility.

FIG. 9 is a characteristic diagram of a conventional contactless power feeding facility.

[Explanation of symbols]

V Carrying body B Guide rail X Induction line unit P Pickup unit M, M'Power supply unit 34 Induction line 36 Pickup coil 43 Sine wave resonance inverter 55 Resonance capacitor 56 Frequency relay 57 Capacitor 58 Zero impedance cable 59 Switch 60 Switch control Device 61 Transistor control device 62 Capacitor forming resonance circuit with pickup coil

Claims (4)

[Claims] 1. A pair of induction lines for flowing a high-frequency current from a power supply device is laid along a moving line of a moving body, and a resonance capacitor is connected to a starting end of the dielectric line, and the moving body is provided with:
A contactless power supply facility for a mobile body provided with a coil that is contactlessly powered from the dielectric line, wherein the ends of the pair of induction lines are connected by a capacitor,
A contactless power supply facility, wherein a plurality of capacitors are connected in parallel between a pair of dielectric lines at a predetermined interval, and adjacent capacitors are short-circuited to each other except at one place. 2. The contactless power supply equipment according to claim 1, wherein a short-circuit line between the resonance capacitor and the first-stage capacitor adjacent to the resonance capacitor is removed. 3. A pair of induction lines for flowing a high frequency current from a power supply device is laid along the moving line of the moving body, and a resonance capacitor is connected to the starting end of the dielectric line,
A contactless power supply facility for a mobile body provided with a coil that is contactlessly powered from the dielectric line, wherein the ends of the pair of induction lines are connected by a capacitor,
A plurality of capacitors are connected in parallel between the pair of dielectric lines at a predetermined interval, both ends of adjacent capacitors are short-circuited to each other, and a switch is provided on each of the two short-circuit lines of the first stage adjacent to the power supply device. A contactless power supply facility comprising a control means for turning on the switch when the power supply device starts up. 4. The induction line is provided with a frequency relay, and the control means turns on a switch when the frequency detection signal of the frequency relay detects that the frequency of the induction line deviates from a predetermined frequency. The non-contact power feeding facility described in 3.