JP3432530B2 - Contactless power supply equipment for mobile objects - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact power supply system for a mobile body, and more particularly, to a non-contact power supply for a self-propelled carrier for self-propelled transportation along a traveling path. It concerns equipment. 2. Description of the Related Art FIG.
This will be described with reference to FIG. 11 and FIG. The transporting vehicle body V as a moving body is composed of a drive trolley 1A, a driven trolley 1B, and an article transporting carrier 1C supported by these trolleys 1A and 1B, and a guide rail B for movably guiding the vehicle body V. Are provided. The drive trolley 1A includes a traveling wheel 2 which is engaged with an upper portion of a guide rail B, a steady roller 3 which contacts a lower portion of the guide rail B from both sides, and a current collecting unit D.
And the traveling wheels 2 are driven by an electric motor 4 with a speed reducer. The driven trolley 1B includes a traveling wheel 5 that engages with the upper part of the guide rail B, and a steadying roller 6 that contacts the lower part of the guide rail B from both sides. The guide rail B has a wheel guide 7 at its upper part and a roller guide 8 at its lower part. The guide rail B is suspended from a ceiling or the like by a support frame 9 connected to one lateral side. An energizing rail unit U is attached to the other side of the guide rail B from the side to which the support frame 9 is attached. The energizing rail unit U supplies electric power to the vehicle body V by three-phase alternating current, and outputs a traveling control signal to the vehicle body V.
A pair of upper and lower locking portions 11 provided on the guide rail B is provided with four energizing rails L, and a rail support frame 10 for supporting the energizing rails L in a parallel state. It is screwed in a state where it is locked. As shown in an enlarged view in FIG. 12 (b), the energizing rail L is a rail main body 12 formed of a conductive material such as copper.
And a holder 13 formed of a non-conductive material such as a synthetic resin.
The holder 13 is provided with a pair of protective walls protruding from both lateral sides of the rail body 12 to the current collector side,
The collector contact surface of the rail body 12 is formed as a recessed surface that is located closer to the center in the rail width direction. The current collecting unit D includes a pair of current collectors 14 on each of the energizing rails L, and as shown in FIG.
A pair of current collectors 14 for one energizing rail L are located at an interval in the front-rear direction of the vehicle body V, and the four current collectors 14 at the front of the vehicle body are combined into one unit, and similarly, the four current collectors 14 at the rear of the vehicle body are combined. The electrons 14 are combined into one unit. With the above structure, the vehicle body V of the moving body is supplied with power from the power supply rail L of the power supply rail unit U of the guide rail B via the current collector 14, and the traveling wheels are driven by the supplied electric motor 4 with a speed reducer. 2 is driven and guided and moved by the guide rail B. However, in such a conventional power supply equipment for a mobile body, the rail main body of the current-carrying rail L is provided.
Since the 12 and the current collector 14 are worn by contact with each other, maintenance is indispensable, and there is a problem that dust is generated. Furthermore, since the conductive material (rail main body 12) of the energizing rail L is exposed, there is a risk of electric shock, and furthermore, a spark is generated, so that it cannot be used in an explosion-proof area. In order to solve such a problem, a non-contact power supply facility as shown in FIG. 13 has been proposed. In the contactless power supply equipment shown in FIG. 13, a primary core 21 fixed to a charging station of a mobile body and a secondary core 23 vertically suspended below the mobile body 22 stopped at the charging station face each other with a gap length g. A magnetic path is provided to transmit electric power. That is, when an alternating current is applied to the coil 24 wound around the primary core 21 provided in the charging station,
An electromotive force is generated in the coil 25 wound around the secondary core 23, and the AC current generated in the coil 25 is supplied to the battery 27 via the AC-DC converter 26, and the battery 27 is charged.
Using the battery 27 as a driving power source, the moving body 22
Drive 28 and drive. However, in such a configuration, if the moving body 22 is not stopped once at the charging station, it is not charged, so that the work efficiency is poor. Further, if the primary core 21 is laid along the traveling path, such a problem occurs. Was solved, but it was difficult to manufacture and was impossible in terms of cost. Furthermore, since the primary side self-inductance changes greatly due to the change in the gap length g, the primary side current value changes greatly, and the secondary side voltage value changes greatly, resulting in overcurrent and overvoltage. In some cases, the protection device operated and power could not be supplied. Further, since the moving body 22 is not supplied with power in accordance with the required power at a position where power-up is required, for example, a load transfer position, a large-capacity battery 27 is required, and thus the moving body 22 becomes expensive. There is a problem that a large installation space is required inside. The present invention solves the above problem,
It is an object of the present invention to provide a non-contact power supply equipment capable of supplying power by contacting a moving body without contact and increasing power at a predetermined position. [0013] In order to solve the above-mentioned problems, a contactless power supply system for a mobile object according to the present invention comprises a line through which a high-frequency sinusoidal current flows along a traveling path on which the mobile object travels. Laying, the non-contact power supply equipment of the moving body provided with a pickup coil that resonates with the frequency of the line on the moving body and generates an electromotive force, wherein a coil unit is inserted into the line at a predetermined position on the traveling path. The coil unit is recessed at the center so that the pickup coil does not come in contact with the coil unit.
A box-shaped main body, a connection terminal provided on the main body, to which the line is connected, and an inner surface of the recess in the main body.
And internal wirings laid in a loop along the connection terminals to connect the connection terminals. According to the configuration of the present invention, when an electric current is applied (alternating current) to the induction line, an electromotive force is generated in the coil.
The moving body is supplied with power in a contactless manner even while traveling, and travels along the traveling path. Further, the predetermined position of the line was inserted carp
Guide line by loop-shaped internal wiring
Are multiplexed , supply power is increased, and required load power is stably supplied at a position where large load power is required, such as at the time of transferring a load or increasing the traveling speed of a moving body. In addition, since the loop-shaped coil multiplexed into the guide line is unitized, there is no need to perform a complicated coil winding operation on site at a position where power-up is required, and the on-site operation is facilitated. An embodiment of the present invention will be described below with reference to the drawings. The same components as those of the conventional example shown in FIGS. 11 and 12 are denoted by the same reference numerals, and description thereof will be omitted. FIG. 1 is a side view of the contactless power supply equipment for a moving body of the present invention, and FIG. 2 is a partial cross-sectional front view of the moving body of the contactless power supply equipment of the moving body of the present invention. In the non-contact power supply equipment for a moving body according to the present invention, the guide rail B is provided with a guide line unit X instead of the conventional energizing rail unit U, and the vehicle body V is provided with a pickup unit instead of the conventional current collecting unit D. P, and a power supply device M. The guide line unit X is provided with a bracket 32 having a pair of upper and lower hangers 31 vertically protruding at predetermined intervals along the guide rail B at one lateral side of the guide rail B. A resin duct 33 is stretched along the guide rail B at the front end of each of the loops. Inside each duct 33, a start end is connected to the power supply M, and an end is connected. Is laid and configured. The guide line 34 is formed of an insulator, for example, a litz wire (extremely fine stranded wire) covered with a resin material. At a predetermined position requiring a large load power, such as a transfer station of the guide rail B, as shown in FIG. 3, the duct 33 between the predetermined positions is removed, the coil unit E is inserted, and the bracket 32 is inserted. Screwed on top. As shown in FIG. 4, the coil unit E has a main body 38 formed in a box shape having a concave portion 38A at the center so that a pickup coil 36 described later does not come into contact with the main body 38. Opposite connection terminals (crimp terminals) 39A, 39B, 39C, 39D are provided at the position of the duct 33, and the terminals 39A, 39B to which the upper guide line 34 is connected are connected by an internal wiring 40A made of a litz wire, and The terminals 39C, 39C to which the guide line 34 is connected are connected by an internal wiring 40B made of a litz wire. Terminal 39A, 39
The internal wiring 40A connecting between B is formed by the upper convex portion 38C of the main body 38.
The internal wiring 40B, which is laid along the upper part of the inside and connects between the terminals 39C, 39C, once descends to the bottom side (the bracket 32 side) through the upper part in the lower convex part 38B of the main body 38, and After passing through 38A, it rises to the upper part in the upper convex part 38C of the main body 38, passes through this convex part 38C, descends to the bracket 32 side, passes through the concave part 38A, rises to the upper part in the lower convex part 38B, and again this lower part Once passing through the upper part of the convex part 38B, it descends to the bracket 32 side, passes through the concave part 38A, rises to the upper part of the upper convex part 38C, passes through the upper convex part 38C, descends to the bracket 32 side, and the inside of the concave part 38A. The coil unit E rises to the upper part in the lower convex part 38B and is laid through the upper part in the lower convex part 38B. The coil unit E is filled with an insulator so that the internal wirings 40A and 40B do not contact each other. The bent portion of the internal wiring 40B is formed to be substantially perpendicular except for the litz wire covering. By inserting such a coil unit E into the guide line 34, the lower guide line 34 is laid in a loop as shown in FIG. Is tripled. At the end of the guide rail B or at the joint of the guide rail B, as shown in FIG.
When picking up a loop, it cannot be bent at a right angle due to its thickness and rigidity.
In order to prevent the contact with the guide rail B, the duct 33 at the end of the guide rail B is removed, and the guide line 34 hanging toward the bracket 32 is fixed on the bracket 32 by a fixing member 32A provided at the end of the guide rail B. ing. As shown in FIG. 6, the pickup unit P is formed by winding the above-mentioned litz wire around an H-shaped ferrite 35 for 10 to 20 turns, for example, as shown in FIG.
And a ferrite plate 37 is attached to the side of the ferrite 35 on the vehicle body V side. The pickup unit P has a center of the ferrite 35 substantially at the center of the pair of ducts 33 of the guide line unit X, and a guide rail. B is fixed to the vehicle body V so as to be perpendicular to B. Guidance line 34
When an electric current is supplied (AC) to the pickup coil 36, 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 includes a diode 46 for full-wave rectification and a coil forming a filter.
47, a capacitor 48, a resistor 49, and a transistor 50 for short-circuiting the resistor 49. The sine-wave resonant inverter 43 includes transistors 51 and 52 alternately driven by a rectangular wave signal shown in FIG. Coil 53 and transistor
Current supply coil 54 connected to 51 and 52, and induction line
34 and a capacitor 55 forming a resonance circuit. Note that the transistor control device is omitted. The vehicle body V includes a switch 56, a pickup coil 36 and an induction line in parallel with the pickup coil 36.
Capacitor 57 that forms a resonance circuit that resonates at a frequency of 34
, A rectifying diode 58 is connected in parallel to the capacitor 57 of the resonance circuit, and a constant voltage power supply circuit 59 for controlling the output of the diode 58 to a predetermined voltage is connected to the diode 58. The motor 59 is connected to the load 59, for example, via an inverter 60. The constant voltage power supply circuit 59 includes a current limiting coil 61, an output adjusting transistor 62, a diode 63 and a capacitor 64 forming a filter. When the switch 56 is turned on (closed), a closed loop is formed with the pickup coil 36, and the supply of power to the constant voltage power supply circuit 59 becomes zero,
Power supply to the load stops. In the circuit configuration of the vehicle body V, even if a short circuit occurs instead of the switch 56 in a part of the circuit, only the supply of power stops, and no overcurrent flows. Is unnecessary. Further, a control device of the transistor 62 is omitted. The operation of the power supply device M, the guide line 34, the coil unit E, and the vehicle body V will be described. First, a three-phase AC 200 V output from an AC power supply 41 is converted to DC by a converter 42, converted to a predetermined high frequency, for example, a sine wave having a resonance frequency of 10 kHz by a sine wave resonance inverter 43, and supplied to the induction line 34. Is done. The magnetic flux generated in the induction line 34 generates an electromotive voltage in the pickup coil 36 of the vehicle body V that resonates with the frequency of the induction line 34, and the alternating current generated by the electromotive voltage is a diode.
The motor 4 is rectified at 58, regulated to a predetermined voltage by a constant voltage power supply circuit 59, supplied to an electric motor 4 with a speed reducer via an inverter 60,
Is driven, and the vehicle body V of the moving body moves while being guided by the guide rail B. At the position where the coil unit E is inserted into the induction line 34, the magnetic flux density is tripled, the electromotive voltage generated in the pickup coil 36 is tripled, and the power is increased to supply a large load power. Switch 56
Is turned on, a closed loop is formed with the pickup coil 36, power supply to the constant voltage power supply circuit 59 is stopped, and the vehicle body V is stopped. As described above, power can be supplied to the vehicle body V in a non-contact manner, so that abrasion of the current-carrying rail L and generation of dust as in the related art can be eliminated, and maintenance-free operation can be realized. Further, power can be increased at the position where the coil unit E is inserted into the guide line 34. If this predetermined position is a transfer station, a large load power required for transfer work can be supplied. Then, a large load power required for speeding up the vehicle body V can be supplied. Further, a battery having a large capacity as in the related art is not required, and the mounting space for the vehicle body V can be reduced. In addition, since the coil unit E is used as a unit to form a loop-shaped coil that is multiplexly inserted into the guide line 34, it is not necessary to perform a complicated coil winding operation on site at a position where power-up is required. Therefore, the work efficiency can be improved, the relocation can be more easily performed, and the power-up position can be easily changed. Since the length of the guide line 34 is much longer than the length of the pickup coil 36, for example, the length of the pickup coil 36 is 10 to 15 cm with respect to the length of the guide line 34 of 100 m. Therefore, the primary-side self-inductance of the induction line 34 is substantially constant, and the sine-wave resonance inverter 43 is used. a current is applied to and by the secondary side of the pickup coil 36 is the resonant circuit, as shown in FIG. 8, the resonance frequency f _o with a large electromotive voltage on the secondary side v (1000~2000V in the drawing) Occurs, and even if the gap length between the induction line 34 and the pickup coil 36 changes, or if the frequency of the induction line 34 slightly fluctuates, the resonance frequency on the secondary side also fluctuates slightly from the frequency of the induction line 34. However, the frequencies f _{1 to} f _In the range of 2, a secondary side voltage higher than a predetermined value (300 V in the figure) can be generated, so that large power can be supplied stably. Therefore, the gap length can be roughly adjusted, the workability is improved, and the production can be facilitated. In addition, since a core is not required on the primary side, a line can be easily laid at low cost. Further, an induction line 34 and a pickup coil 36
By using a litz wire coated with an insulator for
There is no exposure of the conductive part, safety can be improved,
In addition, since the spark is eliminated, there is no danger such as a fire, and it can be used in an explosion-proof area. Further, since a sine wave is supplied to the induction line 34, no harmonic is generated, and generation of radio noise can be eliminated. As shown in FIG. 5 (a), at the joint of the guide rail B, the coupling between the guide line 34 and the pickup coil 36 becomes weak at the bent portion of the loop of the guide line 34, and the vehicle body V When transiting between B, the electromotive force generated in the pickup coil 36 decreases. When such a decrease in the electromotive force is large, the terminal unit F shown in FIGS. 9 and 10 is screwed onto the bracket 32 and the induction line 34 is connected. In the terminal unit F, the main body 71 is formed in a box shape having a concave portion 71A at the center so that the pickup coil 36 does not come into contact with the main body 71, and the main body 71 faces the upper and lower ducts 33 respectively. Connection terminal (crimp terminal) 72
A and 72B are provided, and the terminals 72A and 72B are connected by an internal wiring 73 made of a litz wire. The internal wiring 73 is laid to the end along the upper portion of the upper convex portion 71B of the main body 71, temporarily descends to the bottom side (the bracket 32 side), passes through the concave portion 71A of the main body 71, and passes through the lower convex portion of the main body 71. It goes up to the upper part in 71C and is laid through the upper part in this convex part 71C,
The inside of the terminal unit F is filled with an insulator. The bent portion of the internal wiring 73 is formed to be substantially perpendicular except for the litz wire covering. Such a terminal unit F
Is attached to the end of the guide line 34,
As shown in FIG. 9 (a), 34 is laid down to the joint of the guide rail B, so that the electromotive force generated in the pickup coil 36 can be prevented from lowering. In this embodiment, the two guide lines 34 are laid separately from the guide rail B. However, if the two guide lines 34 cannot be laid on the guide rail B, one of the guide lines B may be used. A configuration may be adopted in which only the guide line 34 is laid along the guide rail B, the other guide line 34 passes through another route, and the pickup coil 36 moves only in proximity to the one guide line 34. In this case, at positions where power-up is required, the terminals 39C and 39 of the inserted coil unit E are placed.
It is necessary to connect the guide line 34 to D. In this embodiment, the vehicle body V that moves in the left-right direction is described. However, the vehicle body (moving body) that moves in the vertical direction along the guide rail B is also guided by the guide path. The same effect can be expected for a moving object that does. Further, in this embodiment, the loop in the coil unit E is tripled, but the power can be further increased by further increasing the number of turns of the loop. As described above, according to the present invention, when electricity is supplied to the induction line (alternating current), an electromotive force is generated in the coil, so that the coil can be brought into contact with the moving body without contact. Power can be supplied, and wear and dust on the current-carrying rail as in the related art can be eliminated, and maintenance-free operation can be realized. At a predetermined position on the track , the inserted coil
Many induction lines due to loop-like internal wiring in the knit
By overlapping , the supply power can be increased, and the required load power can be stably supplied at a position requiring a large load power, such as when the traveling speed of the moving body is increased. Further, by unitizing the loop-shaped coil inserted into the guide line, it is not necessary to perform a complicated coil winding operation on site, and the on-site operation can be facilitated. Also, the power-up position can be easily changed, and the power-up position can be easily changed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a non-contact power supply facility for a moving object in one embodiment of the present invention. FIG. 2 is a partial cross-sectional front view of a non-contact power supply facility of the moving body. FIG. 3 is a front view and a side view of a predetermined position of a guide line unit of the non-contact power supply equipment of the moving body. FIG. 4 is a perspective view of a coil unit of the contactless power supply equipment of the moving body. FIG. 5 is a front view and an AA arrow view of a terminal end of a guide rail B of the non-contact power supply equipment of the moving body. FIG. 6 is a front view and a side view of a pickup coil of the contactless power supply equipment of the moving object. FIG. 7 is a circuit configuration diagram of a non-contact power supply facility of the mobile object. FIG. 8 is a graph showing secondary-side frequency-electromotive force characteristics of the contactless power supply equipment of the mobile object. FIG. 9 is a front view and an AA arrow view of a terminal end of a guide rail B provided with a terminal unit of the non-contact power supply equipment of the moving body. FIG. 10 is a perspective view of a terminal unit of the non-contact power supply equipment of the moving object. FIG. 11 is a side view of a conventional moving body and a power supply device. FIG. 12 is a partial cross-sectional front view of a conventional moving body and a power supply device. [Fig. 13] Fig. 13 is a configuration diagram of a conventional wireless power transfer facility for a mobile body. [Description of Signs] V Car body B Guide rail X Guidance line unit P Pickup unit E Coil unit M Power supply unit F Terminal unit 33 Duct 34 Guidance line 36 Pickup coil 38 Coil unit body 39A, 39B, 39C, 39D Coil unit connection Terminals 40A, 40B Coil unit internal wiring 43 Sine wave resonance inverter 55 Capacitor forming resonance circuit with induction line 57 Capacitor forming resonance circuit with pickup coil

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 4-35601 (JP, U) JP-A 60-25303 (JP, U) Special Table JP 6-506099 (JP, A) (58) Survey Field (Int.Cl. ⁷ , DB name) B60L 5/00 B65G 54/00 H02T 5/00

Claims (1)

(57) [Claims 1] A line through which a high-frequency sine wave current flows is laid along a traveling path on which a moving body travels, and the moving body resonates at the frequency of the line and generates a sine wave current. A non-contact power supply facility for a moving body provided with a pickup coil that generates electric power, wherein a coil unit is inserted into the line at a predetermined position on the traveling path, and the coil unit is disposed at a central portion so that the pickup coil does not contact. Concave
A box-shaped main body provided with a portion, a connection terminal provided on the main body, to which the line is connected, laid in a loop along the inner surface of the concave portion in the main body, and connecting between the connection terminals. A non-contact power supply facility for a moving object, comprising: an internal wiring.