JP2002067747A - Power supply facilities - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide power supply facilities capable of feeding electricity to a moving body at the time of transferring between electrified rails. SOLUTION: It is constituted to take synchronism of an induced current to be supplied to an inductive line 47 from an inverter M by transmitting a clock pulse signal in parallel to another inverter M from the specific inverter M (A) by connecting a light transmission device 51 to each of the inverters M by providing a pickup coil 5 to be fed with non-contact from the inductive line 47 to a mobile vehicle V by laying a plural number of the inductive lines 47 to which a high frequency electric current is supplied from the inverter M in sequence along a rail device B to guide the mobile vehicle V. In this constitution, it is possible to feed electricity to the mobile vehicle V with no contact even in a transferring area A of the inductive line 47, to start the mobile vehicle V with no trouble even when it stops for a long period of time in the transferring area A and to make the mobile vehicle V move to stop, move, place, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for supplying an alternating current to a plurality of lines arranged sequentially along a moving path of a moving body and supplying power to the moving body.

[0002]

2. Description of the Related Art There is a non-contact power supply facility as a conventional power supply facility for a moving body. 2. Description of the Related Art A conventional non-contact power supply facility is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-153305.

That is, an induction line to which a constant high-frequency current is supplied from a power supply device is provided along a guide rail (an example of a moving line) of a vehicle body (an example of a moving body). A pickup coil fed from the dielectric line in a non-contact manner, and a pickup coil and a capacitor forming a resonance circuit resonating with the frequency of the induction line are connected in parallel with the pickup coil. Connect a smoothing circuit and further rectify /
A stabilized power supply circuit for maintaining the output voltage at the reference voltage is connected to the smoothing circuit. The stabilized power supply circuit supplies power via an inverter to a motor corresponding to the load, which is connected to the traveling wheels of the vehicle body for transportation.

[0004] Further, if the transfer distance by the transfer vehicle body becomes long, that is, if the guide rail becomes long, the length (distance) of the guide line to which power can be supplied is limited due to the current capacity of the power supply, as shown in FIG. In addition, an induction line 64 for supplying a high-frequency current from a power supply 63 is sequentially laid along a guide rail (moving line) 62 of a vehicle body (moving body) 61.

However, in this configuration, the vehicle body 61 is
In the section (transit section) A where the vehicle is connected to the guide line 64 from the 64, a depletion point of the magnetic path with the pickup coil 65 is generated, the electromotive force is not induced in the pickup coil 65 (power cannot be supplied), and the vehicle body 61 stops. There is fear. As measures for this, the following measures 1 to 3 are implemented. Countermeasure 1 A battery having a capacity large enough to pass through the transit section A is mounted on the vehicle body 61, and power is supplied to the motor from the battery in the transit section A. Countermeasure 2 The vehicle body 61 is provided with two sets of pickup coils 65 before and after along the moving line 64, and power can be supplied to the motor by an electromotive force induced by any one of the pickup coils 65. Countermeasure 3 As shown in FIG. 8, in the connecting section A, the induction line 64 that supplies the high-frequency current from the power supply 63 is folded back so that the line is formed in a loop shape so that the induction line 64 alternately faces the moving direction of the vehicle body 61. , At least one guideway 64 and the vehicle body
A magnetic path is formed between the 61 pickup coils 65 (see, for example, JP-A-5-344603).

[0006]

However, each of the above three measures has the following problems. Measure 1 above
Then, when the number of the vehicle bodies 61 increases, the cost increase accompanying the mounting of the battery cannot be ignored, and the battery needs to be regularly maintained.

In the above measure 2, the pickup coil
Since at least the condenser and the rectifying / smoothing circuit are required together with the 65, when the number of the vehicle bodies 61 increases, the cost increase due to the mounting of these devices cannot be ignored.

In the above measure 3, if the phase of the output of the power source 63 is not controlled, the current phases of the two opposing induction lines 64 in the connecting section A do not match, and in the worst case, the phases of the two induction lines 64 are different. 180 °, the magnetic fluxes generated by the two induction lines 64 cancel each other, so that no electromotive force is induced in the pickup coil 65 (power cannot be supplied), and the vehicle body 61 may be stopped. Further, in this case, the power supply section between the pickup coil 65 and both the guide lines 64 becomes wider than in the connecting section A shown in FIG.

In measures 1 to 3, the connecting section A
If the vehicle body 61 is stopped, it may not be possible to start the vehicle. Therefore, it is necessary to shift the stop point when traffic congestion occurs in the station or the vehicle body 61 so as to avoid the connecting section A, and the layout and operation are restricted. There was a problem.

Therefore, the present invention makes it possible to supply power to a moving body when connecting between lines to be supplied with power,
It is an object of the present invention to provide a power supply equipment capable of suppressing an increase in cost and increasing a degree of freedom in layout.

[0011]

According to a first aspect of the present invention, an AC current is supplied to a plurality of lines sequentially arranged along a moving path of a moving body. A power supply device that supplies an AC current to each line, the power supply device outputs a clock signal to another power supply device, and synchronizes the AC current flowing through the line. It is characterized by having done.

With the above configuration, a clock signal is output from the power supply to another power supply, and the other power supply supplies an AC current in synchronization with the clock signal, and the AC current supplied to the line is synchronized. . Therefore, the disadvantage that the currents supplied from the connected power supply devices are canceled each other is eliminated, and the power is supplied to the moving body.

The invention according to claim 2 is characterized in that an optical communication path is used for transmitting the clock signal. With the above configuration, the delay time associated with the transmission of the clock signal is minimized, and the phase shift of the current supplied from each power supply device to the line is minimized.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a route diagram of a load transfer facility provided with a power supply unit according to an embodiment of the present invention, FIG. 3 is a partial plan view of the transfer unit, and FIG. 4 is a side view of a self-propelled vehicle of the transfer unit. 5 is a partial cross-sectional front view of the transport equipment.

The load transporting equipment is composed of a plurality of self-propelled vehicles (an example of a moving body) V and rail devices B forming moving paths C1 and C2 of the self-propelled vehicles V. It moves while being guided by the rail device B. The movement path C1 indicates a main transport line, and the movement path C2 indicates a standby line.

The vehicle V and the rail device B will be described in detail. [Autonomous Vehicle] The self-propelled vehicle V includes a self-propelled vehicle body 1 and a front-rear direction (a traveling direction of the self-propelled vehicle V) which is erected at the center of the self-propelled vehicle body 1
It comprises a carrier 3 supported by two supports 2 and on which a load L to be conveyed is placed.

At the center of the lower surface of the carrier 3, a pickup coil 5 is mounted, in which an electromotive force is induced by a magnetic flux generated by an induction line described later. As shown in FIG. 6, the pick-up coil 5 has five cores 6 made of ferrite having a cross section of an E-shape (which may be an I-shape or a T-shape) in a lateral direction (along a rail device B in FIG. direction)
And is fixed to the base body 8 via a non-magnetic plate 7 with screws 8A. In addition, cores 6 arranged in the horizontal direction
A cable 9 made of, for example, a litz wire of 10 to 20 turns is wound around both surfaces of the central portion 6A. Further, a mounting member 10 is mounted on the side of the base body 8. Urethane rubber 10A is inserted between the core 6 at both ends and the folded portion of the plate 7.

FIG.
And as shown in FIG. 5, a total of four running wheels 11, which are attached to the vehicle so as to be freely rotatable via an axle and support the self-propelled vehicle V; 8 in total
And a linear motor driver 14 that is supplied with power from the pickup coil 5 and supplies a primary current to the primary coil 13 of the linear motor. I have.

The self-propelled vehicle body 1 has a seesaw 22 which is disposed in front and rear of the vehicle 1 as means for selecting a traveling route, and has transfer wheels 21 attached to left and right ends thereof.
And a support 23 rotatably supporting a central support shaft of the seesaw 22, and connected to the support shaft of the seesaw 22, further supplied with power from the pickup coil 5, and rotating the support shaft to switch between left and right. A drive unit 24 including a motor for moving the position of the wheel 21 up and down, and a seesaw 22
A shaft 25 is provided for connecting the central support shaft.

The self-propelled vehicle body 1 has a roller 26 which is rotated by the movement of the self-propelled vehicle body 1 and comes into contact with a first traveling guide surface 41 of a traveling rail 31 which will be described later. And a controller (not shown) for judging the traveling path to travel / stop or move while checking the traveling position by counting pulse signals output from the encoder 27. The controller outputs a traveling command to the driver 14 of the linear motor during traveling, and drives the driving unit 24 when changing the traveling route. The linear motor driver 14 supplies a primary current to the primary coil 13 of the linear motor in accordance with a traveling command from the controller. [Rail device] The rail device B has a shape that covers the self-propelled vehicle body 1 so that the dust generated when the self-propelled vehicle body 1 of the self-propelled vehicle V travels does not diffuse outside. A pair of left and right traveling rails 31 and the left and right traveling rails
Left and right side wall panels 32 fixed to the
(Including the support 2) and a pair of left and right upper panels 33 that can pass through. The pair of right and left running rails 31 are connected at their lower ends.

The traveling rail 31 has a first traveling guide surface 41 that contacts the traveling wheels 11 from below, and a second traveling guide surface 42 that contacts the lateral movement regulating wheels 12 from outside. Inside the running rail 31, the primary coil 13 of the linear motor.
In the traveling direction of the vehicle V, N-pole magnets and S-pole magnets 44 are repeatedly arranged.

A pair of guide rails 45 having running guide surfaces respectively contacting the left and right transfer wheels 21 are provided on the inner side surfaces of the left and right side wall panels 32, respectively. A guide line 47 is laid at the opposite end supported by a hanger 46 protruding from the end.

The above-mentioned guide line 47 is formed by using a twisted wire (hereinafter, referred to as a litz wire) formed by collecting insulated thin wires, as an insulator.
For example, it is composed of a loop-shaped cable formed by covering with a resin material. As shown in FIG. 1, a plurality of (six in FIG. 1) guide lines 47 are arranged along a rail device B which is a moving route. They are laid in order. In addition, each guide line 47
The start and end of each are inverters (an example of a power supply)
M.

Each of the inverters M has a voltage of 200 V AC.
A three-phase AC power supply (not shown) is connected, and an optical transmission device 51 is connected to each inverter M as shown in FIG.

A clock pulse signal for specifying the frequency of the induced current supplied from the specific inverter M (A) to the induction line 47 is output to the optical transmission device 51 (A), and the specific optical transmission device 51 (A) is output. The clock pulse signal is output in parallel to another optical transmission device 51 via each optical transmission line (optical communication line) 52. Each optical transmission device 51 inputs the clock pulse signal to each inverter M, and each inverter M supplies an induction current synchronized with the clock pulse signal to the induction line 47.

The operation of the above configuration will be described below.
First, an AC 200 V AC output from an AC power supply is converted into a high frequency, for example, a 10 kHz high frequency induction current by an inverter M and supplied to an induction line 47. This guide line
An electromotive force is induced in the pickup coil 5 by the magnetic flux generated in 47, and an electromotive force is induced in the pickup coil 5 of the vehicle V. The alternating current generated by the electromotive force is
The rectified voltage is regulated to a predetermined voltage and supplied to the controller, the linear motor driver 14 and the drive unit 24. Then, when a traveling command is output from the controller to the linear motor driver 14, the linear motor driver 14 supplies a primary current to the primary coil 13 of the linear motor in accordance with the traveling command of the controller. V moves while being guided by the rail device B (the running rail 31).

When changing the movement route between the main transport line C1 and the standby line C2, the controller instructs the drive unit 24 so that the transfer wheel 21 comes into contact with the guide rail 45 on the selected movement route side. Next, the seesaw 22 is driven.
Then, when the vehicle reaches the branch, the transfer route is changed by the transfer wheels 21 being guided by the guide rail 45 on the selected transfer route side.

Each inverter M inputs the clock pulse signal output from the specific inverter M (A) via the optical transmission devices 51 (A) and 21 and the optical transmission line 52, and synchronizes with the clock pulse signal. Then, a high-frequency induction current is supplied to each induction line 47.

Therefore, the phases of the respective guide lines 47 almost coincide with each other. Therefore, even when the self-propelled vehicle V passes through the transit section A of the guide line 47, an electromotive force is induced in the pickup coil 5, so that the primary coil of the rear motor is 13 can be supplied and can pass without stopping at the connecting section.

As described above, by performing the synchronous operation, it is possible to contactlessly supply power to the self-propelled vehicle V even in the transit section A of the guide line 47, and the self-propelled vehicle V stops for a long time in the transit section A. Thus, the vehicle V can be started without any problem, and the operation of the self-propelled vehicle V such as stopping and transferring can be performed. Therefore, stations and stop points can be arranged in the connecting section A, the degree of freedom of layout can be increased, and almost the same operation as other normal sections can be performed.

Furthermore, it is not necessary to mount a battery, a plurality of pickup coils, and their attached devices on the self-propelled vehicle V as in the prior art, and it is possible to avoid an increase in the cost of the self-propelled vehicle V. This is effective as the number of self-propelled vehicles V increases.

Further, by using the optical transmission device 51 and the optical transmission line 52, the phase shift of the clock pulse signal due to the transmission time can be minimized, and the phase shift between the guide lines 47 can be minimized. Can be suppressed. When the transmission distance is short, the clock pulse signal may be sent using a normal electric signal.

In this embodiment, each inverter M
Is synchronized with the clock pulse signal output from the specific inverter M (A), but may be synchronized for each of a plurality of clock pulses.

Further, in this embodiment, the adjacent guide lines 47 are simply arranged to face each other, but as shown in FIG. The guide line 47 may be folded back to form a loop by alternately facing the guide line 47 so that a magnetic path can be formed between at least one of the guide lines 47 and the pickup coil 5 of the vehicle V.

In this embodiment, the clock pulse signal is transmitted in parallel from a specific optical transmission device 51 (A) to another optical transmission device 51, but each optical transmission device 51 is connected by an optical transmission line 52. They may be connected in series and transmitted in order. However, since the transmission time in the optical transmission device 51 and the optical transmission line 52 connected in series is accumulated, the phase may be shifted between the first clock pulse signal and the subsequent clock pulse signal, which is not preferable.

In this embodiment, two guide lines 47 are used.
Is laid on the rail device B, but two or more guide lines 47 can be laid on the rail device B to increase the power. In addition, it is also possible to provide a non-contact power supply by laying one guide line 47 on the rail device B. At this time, it goes without saying that only one hanger is required.

In the present embodiment, the vehicle V moving in the left-right direction is described. However, the present invention is similarly applied to a vehicle (moving body) moving up and down along the rail device. Yes, and the same effect can be expected.

In the present embodiment, the guide rails 47 are laid on the rail device B to supply electric power in a non-contact manner. Power may be supplied from the inverters M, and the vehicle V may be provided with current collectors supplied from the power supply rails instead of the pickup coils 5 to supply power to the vehicle V. At this time, the power is supplied to the motor of the self-propelled vehicle V sufficiently even in the connecting section of the energizing rails by adopting a configuration in which the power is supplied to the plurality of energizing rails in the same manner in the same manner. Even if the vehicle V is stopped for a long time, the vehicle V can be started without any problem, and the operation of the self-propelled vehicle V such as stop and transfer can be performed. Therefore, a station or a stop point can be arranged in the connecting section, the degree of freedom in layout can be increased, and almost the same operation as in other normal sections can be performed.

[0039]

As described above, according to the present invention, power can be supplied to the moving body even in the transit section of the track, so that operations such as stopping and relocating the moving body in the transit section become possible. Stations and stop points can be arranged in the connecting section, and the degree of freedom in layout can be increased.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a load transport facility including a power supply facility according to an embodiment of the present invention.

FIG. 2 is a route diagram of a load transport facility provided with the power supply facility.

FIG. 3 is a partial plan view of a load carrying facility provided with the power supply facility.

FIG. 4 is a side view of a self-propelled vehicle of a load transfer facility equipped with the power supply facility.

FIG. 5 is a partial cross-sectional front view of a load carrying facility provided with the power supply facility.

FIG. 6 is a plan view and a front view of a pickup coil of the power supply equipment.

FIG. 7 is a configuration diagram of a conventional power supply facility (contactless power supply facility).

FIG. 8 is a configuration diagram of a conventional power supply facility (contactless power supply facility).

[Explanation of symbols]

 V Self-propelled car B Rail device C1, C2 Movement route L Load M Inverter 1 Self-propelled car main body 3 Loading platform 5 Pickup coil 6 Core 11 Running wheel 12 Lateral movement regulating wheel 13 Linear motor (primary) 14 Linear motor driver 21 Transfer wheels 22 Seesaw 24 Drive 31 Running rail 44 Magnet 45 Guide rail 47 Guide line 51 Optical transmission device 52 Optical transmission path

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuto Funahashi 1500 Komakihara Nitta, Komaki City, Aichi Prefecture F-term in Daifuku Komaki Works (reference) 5H105 BB07 CC02 CC19 DD10

Claims (2)

[Claims] 1. A power supply facility for supplying an alternating current to a plurality of lines arranged sequentially along a moving path of a moving body, comprising: a power supply for supplying an alternating current to each of the lines; A power supply system, wherein the device outputs a clock signal to another power supply device and synchronizes an alternating current flowing through a line. 2. The power supply equipment according to claim 1, wherein an optical communication path is used for transmitting the clock signal.