JPH09284905A - Non-contact power supply equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase electromotive force induced to a coil by constituting a non-contact power supply equipment of a plurality of induction lines arranged and built along the approximately center line to a deep section from a open section of a recess of ferrites. SOLUTION: A pickup unit P arranges 5 pieces of ferrites 31 having and E-shaped section in the parallel with a guide rail B by turning the central projection 31A sideways, and a ferrite plate is mounted on the central projection 31A of the ferrites 31 to fix the pickup unit including the ferrite plate to a base body with a screw through a plate of non-magnetic material. A litz wire is wound over both up and down surfaces of the central projection 31A of the ferrites 31 arranged sideways to form a pickup coil 36. The pickup unit P is so adjusted with a mounting member that the center L on the central projection 31A of the ferrites 31 is positioned at right angles to the guide rail B at the approximately central part of induction lines 14 having two lines each for up and down of an induction line unit X, and it is fixed to the body of a car. As a result, since large electromotive force can be generated, power can be supplied to large load.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless power supply system.

[0002]

2. Description of the Related Art A conventional contactless power feeding facility is disclosed in, for example, Japanese Patent Laid-Open No. 6-153305.

That is, an induction line for flowing a high-frequency current is stretched along a moving line of a moving body, a coil which is fed from the dielectric line in a contactless manner is provided on the moving body, and a resonance circuit is formed in this coil. The capacitor is connected to the capacitor, the rectifying / smoothing circuit is connected to the capacitor, and the DC voltage stabilizing circuit is further connected to the load to supply power to the load without contact.

[0004]

However, in such conventional power feeding equipment for a moving body, the current that can be passed through one induction line is limited by the allowable current value, so that it is induced in the coil. There is a limit to the electromotive force generated, and the current that can be supplied to the load was limited.

Therefore, an object of the present invention is to provide a contactless power supply equipment capable of increasing electromotive force induced in a coil.

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is a pickup coil in which a coil is wound around a side portion of a U-shaped or E-shaped ferrite. A plurality of induction lines are laid side by side along a substantially central line from the open part of the recess of the ferrite to the deep part, a high-frequency current is passed through the plurality of induction lines, and an electromotive force induced in the pickup coil is formed. It is characterized by supplying power to the load by means of.

With the above structure, the magnetic flux generated by the plurality of induction lines induces an electromotive force in the coil and feeds the load. The invention according to claim 2 is the above-mentioned claim 1.
The invention described above is characterized in that the positions of the plurality of guide lines are switched at a predetermined pitch.

With the above structure, the induced currents flowing through the induction line that is close to the coil and the induction line that is remote from the plurality of induction lines are evenly distributed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 is a side view of the contactless power supply equipment for a mobile body according to the embodiment of the present invention, and FIG. 5 is a partial sectional front view of the mobile body of the contactless power supply equipment.

The vehicle body V for transport as a moving body includes a driving trolley 1A, a driven trolley 1B, and these trolleys 1A and 1B.
And a guide rail B for movably guiding the vehicle body V.

The drive trolley 1A comprises a traveling wheel 2 that engages with the upper portion of the guide rail B, a steadying roller 3 that contacts the lower portion of the guide rail B from both sides, and a pickup unit P. Is driven by the electric motor 4 with a speed reducer. Further, the driven trolley 1B includes traveling wheels 5 that engage with the upper portions of the guide rails B, and steady rest rollers 6 that contact the lower portions of the guide rails B from both lateral sides.

The guide rail B is provided with a wheel guide portion 7 at its upper portion and a roller guide portion 8 at its lower portion, and is supported in a suspended state from a ceiling or the like by a support frame 9 connected to one lateral side portion. The guide line unit X is attached to the other side of the guide rail B to which the support frame 9 is attached.

The guide line unit X is provided with a bracket 12 on which a pair of upper and lower hangers 11 vertically project at a predetermined interval along one side of the guide rail B, and is enlarged in FIG. As shown in the figure, a bag-shaped recess 11A is provided at the tip of the hanger 31, and two claws of the cover 13 in which two guide lines 14 having the same current-carrying direction are fitted in the recess 11A in the longitudinal direction are provided. 13A is inserted, and two upper and lower guide lines 14 are laid along the guide rail B.

Further, the bracket 12 is provided at the upper and lower ends by fitting the upper and lower end portions to the claw portions 7A and 8A protruding inward from the wheel guide portion 7 and the roller guide portion 8 of the guide rail B, respectively. The fixing screw 17 is fitted in the screw hole 16 and the tip of the screw 17 is engaged with the guide rail B to fix it.

The two guide lines 14 are, as shown in FIG. 2, a pair of through holes 21 provided in the guide rail B at a predetermined pitch.
The cover 13 is removed in the vicinity of, and the pair of penetrating holes provided on the guide rails B are guided to the rear surface side (side portions where the support frame 9 is attached) through the pair of through holes 21 and the positions thereof are interchanged. Guided to the front through hole 22 and covered again
13 is installed. Therefore, the positions of the two guide lines 14 (positions orthogonal to the traveling direction of the vehicle body V) are switched every time the through holes 21 and 22 provided at a predetermined pitch are passed. As shown in FIG. 2, the upper and lower through-holes 21 and 22 are displaced from each other in the traveling direction of the vehicle body V so that the upper and lower through-holes 21 and 22 are located in the upper and lower positions.
14 is not interrupted, and at least one of the guide lines 14 forms a magnetic path with the pickup coil P.

The inductive line 14 is a stranded wire (hereinafter referred to as a 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, the starting end is connected to the power supply device M and is laid along the guide rail B in a double loop shape.

As shown in FIG. 6, the pickup unit P has five ferrites 31 each having an E-shaped cross section, and the central convex portion 31A thereof is oriented in the lateral direction (the direction along the guide rail B in FIG. 1). ), The ferrite plate 32 is placed on the central convex portion 31A of each ferrite 31, and the ferrite plate 32 is fixed to the base body 34 with the screw 34A via the nonmagnetic plate 33 together with the ferrite plate 32. Also, for example, 10
~ 20 turns of the above litz wire and pick up coil
36, and a mounting member 35 is mounted on the side portion of the base body 34. Further, urethane rubber 37 is inserted between the folded portions of the ferrite 31 and the plate 33 at both ends.

1A, the center L of the central convex portion 35A of the ferrite 31 of the pickup unit P is approximately two above and below the guide line unit X, as shown in FIG. 1A. In the center of the guide line 14,
The guide rail B is adjusted so as to be positioned at a right angle and fixed to the vehicle body V. When the induction line 14 is energized (alternating current), an electromotive force is generated in the pickup coil 36.

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. The power supply M is
AC 200 V three-phase AC power supply 41, converter 42, sine wave resonant inverter 43, and transistor 44 for overcurrent protection
And a diode 45. The converter 42 is a diode 46 for full-wave rectification and a coil forming a filter.
The sine wave resonant inverter 43 comprises a capacitor 47, a capacitor 48, a resistor 49, and a transistor 50 for short-circuiting the resistor 49.
Includes transistors 51 and 52 driven by rectangular wave signals alternately oscillated as shown in the figure, a current limiting coil 53, a current supplying coil 54 connected to the transistors 51 and 52, It comprises an induction line 14 and a capacitor 55 forming a parallel resonance circuit. Note that the transistor control device is omitted.

Further, the vehicle body V is provided in parallel with the pickup coil 36, and is provided with a capacitor 56 which constitutes a resonance circuit which resonates at the frequency of the pickup coil 36 and the induction line 14, and is rectified in parallel with the capacitor 56 of the resonance circuit. diode
57, and a stabilized power supply circuit 58 for controlling the output to a predetermined voltage is connected to the diode 57.
Is connected to a load, for example, the motor 4 via an inverter 63. The stabilized power supply circuit 58 includes a current limiting coil 59, an output adjusting transistor 60, a diode 61 and a capacitor 62 that form a filter. Note that the transistor control device is omitted.

The operation of the circuit configuration of the power supply device M, the guide line 14 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 14. 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 14 due to the magnetic flux generated in each of the upper and lower two guide lines 14 laid in a double loop. Then, the alternating current generated by this electromotive force is rectified by the diode 57, regulated to a predetermined voltage by the stabilizing power supply circuit 58, and supplied to the electric motor 4 with a speed reducer via the inverter 63. V
The traveling wheels 2 are driven by the motor 4 supplied with power, and are guided by the guide rails B to move.

As described above, the vehicle body V can be supplied with power without contact, and by laying two inductive lines 14 above and below, the current flowing in one inductive line 14 can be kept below the allowable current value. While suppressing, a large electromotive force can be generated and a large load can be supplied, as compared with the case where one induction line is laid on each of the upper and lower sides.

By changing the positions of the two guide lines 14 with respect to the pickup unit P at a predetermined pitch, the pickup unit P of the two guide lines 14 is replaced.
The induced currents flowing in the inductive line close to (high coupling) and the distant inductive line (low coupling) can be evenly distributed, and the current flowing in one inductive line 14 is less than the allowable current value. Can be suppressed to

Further, by arranging the two guide lines 14 in the horizontal direction, the pickup coil 36 does not contact the guide line 14 even in the curved portion of the guide rail B, and the vehicle body V can smoothly bend in the curved portion. In addition, the pickup unit P corresponding to the two induction lines 14 has the central convex portion 31A of the ferrite 31 lengthened, and the litz wire is wound over the concave portions of the upper and lower surfaces to form the pickup coil 36. It can be formed by simply handling it.

In this embodiment, two induction lines are used.
14 are arranged side by side in the horizontal direction, but by arranging more induction lines, the electromotive force induced in the pickup coil 36 can be suppressed while suppressing the current flowing through one induction line 14 to the allowable current value or less. Can be increased. The positions of the plurality of guide lines need to be sequentially changed at predetermined pitches.

In the present embodiment, the vehicle body V that moves in the left-right direction is described, but the present invention can be similarly applied to a vehicle body (moving body) that moves along a fixed route, and the same effect is expected. can do.

[0027]

As described above, according to the first aspect of the invention, by arranging a plurality of induction lines along the approximate center line from the open portion to the deep portion of the ferrite recess,
It is possible to generate a large electromotive force and supply power to a large load, as compared with the case where one induction line is laid while suppressing the current flowing through the one induction line to be equal to or less than the allowable current value.

According to the second aspect of the present invention, by replacing the positions of the plurality of induction lines at a predetermined pitch, the induction line that is close to the coil of the plurality of induction lines and the induction line that is distant from the induction line. The induced current flowing in the line can be evenly distributed, and the current flowing in one induction line can be suppressed to the allowable current value or less.

[Brief description of drawings]

1A and 1B are a side view and a plan view of a main part of a guide rail of a contactless power feeding facility according to an embodiment of the present invention.

FIG. 2 is a plan view of a main part of a guide rail of the contactless power feeding facility,
FIG.

FIG. 3 is a circuit configuration diagram of the contactless power supply equipment.

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

FIG. 5 is a partially sectional front view of the contactless power feeding facility.

FIG. 6 is a plan view, a front view, and a side view of a pickup coil of the contactless power feeding facility.

[Explanation of symbols]

V Carrying body B Guide rail X Induction line unit P Pickup unit M Power supply device 11 Hanger 12 Bracket 13 Cover 14 Induction line 21, 22 Through hole 31 Ferrite 36 Pickup coil 43 Sine wave resonance inverter 56 Form resonance circuit with pickup coil Capacitor

Claims (2)

[Claims] 1. A pickup coil is formed by winding a coil around a side portion of a U-shaped or E-shaped ferrite, and a plurality of induction lines are formed along a substantial center line from an opening of the recess of the ferrite to a deep portion. Is installed side by side, a high-frequency current is passed through the plurality of induction lines, and power is supplied to a load by an electromotive force induced in the pickup coil. 2. The contactless power supply equipment according to claim 1, wherein the positions of the plurality of induction lines are switched at a predetermined pitch.