JP2008018908A - Power supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply device to an electric mobile vehicle in which the power supply to a control system is not interrupted even when the mobile vehicle enters and stops in a buffer section immediately before a junction of rails during the rail switching period, the recovery processing for re-starting the travel is easy, and the operational efficiency is not degraded. <P>SOLUTION: The power supply device supplies the power from feeders A, B arranged in a predetermined range of a track to an electric mobile vehicle traveling on a track (not shown) while receiving the power from the feeders A, B, in which the entry of the vehicle in the predetermined range of the track immediately before a junction is temporarily prohibited when the track is switched during the pass of the junction of the track. The power supply device has circuits 22a, 23 for dropping the power to the non-traveling condition of the electric mobile vehicle during the period when the track is switched. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, when a track is switched when traveling on a track while receiving power from a feeder line and passing through a branch junction, the entry of the track immediately before the branch junction into a predetermined range is temporarily prohibited. The present invention relates to a power supply device that supplies electric power to an electric self-propelled vehicle configured as described above from a power supply line disposed in a predetermined range of a track.

Electric self-propelled vehicles are widely used in factory assembly processes and warehouses. In such an electric self-propelled vehicle, a plurality of self-propelled vehicles carrying transported objects are mounted on a common track, supplying power to the driving drive motor and control system mounted on each self-propelled vehicle. The traveling vehicle is independently driven and controlled so that each self-propelled vehicle is automatically driven while being stopped at each predetermined station.
As such a power supply device for each self-propelled vehicle, a power supply line connected to a high-frequency power source is disposed along a common track, and power is supplied to each self-propelled vehicle via a pickup that is magnetically coupled to the power supply line in a non-contact manner. A contact power supply type and a contact power supply type that supplies power to each self-propelled vehicle through a trolley that is in sliding contact with a power supply line disposed along the track are employed.

FIG. 9 is an explanatory diagram for explaining an operation of the electric self-propelled vehicle described in Patent Document 1 when the traveling direction is changed at a junction of rails (tracks).
At the junction of the rails, the rails branch from the fixed rail R1 to the fixed rail R2 or the fixed rail R3. A power supply line E or a power supply line F is provided along each rail, and the self-propelled vehicle (not shown) It is configured to supply power.
When the self-propelled vehicle travels from the fixed rail R1 to the fixed rail R2, the switching rail R4 connects the fixed rail R1 and the fixed rail R2, and when the self-propelled vehicle branches from the fixed rail R1 to the fixed rail R3, the switching rail R5 Connects the fixed rail R1 and the fixed rail R3. The switching rails R4 and R5 are arranged so as to move together when the connection is switched.

Self-propelled to prevent collision of the self-propelled vehicle with the rail and dropping off from the rail during the period when the switching rails R4 and R5 are moving in order to switch the connection at the portion just before the junction of the fixed rail R1 A buffer section is provided where entry of vehicles is temporarily prohibited. While the switching rails R4 and R5 are moving, the self-propelled vehicle is stopped before the buffer section, and power supply to the feeder line F in the buffer section is completely cut off (however, other supply The power supply to the electric wire E is continued). Thereby, even if the self-propelled vehicle enters the buffer section due to some abnormality during the period when the switching rails R4 and R5 are moving, the vehicle stops in the buffer section.
When the movement of the switching rails R4 and R5 is completed and the rail switching connection is completed, the power supply to the power supply line F is resumed, and the self-propelled vehicle that has entered and stopped starts to re-run.
Japanese Examined Patent Publication No. 52-27427

As described above, when the self-propelled vehicle that enters the buffer section at the time of rail switching is stopped in the buffer section when the power supply to the feeder line F is completely cut off in the buffer section immediately before the junction of the rails, the self-run Since the power supply to the vehicle control system is also cut off and information necessary for drive control is lost, there is a problem that the recovery process for resuming the travel takes time and operational efficiency is lowered.
More specifically, when power supply to the control system of the self-propelled vehicle is interrupted, the storage of destination information and the like is lost, and it is necessary to instruct again from the ground side control panel, resulting in low operational efficiency.
Also, as seen from the ground side control panel, the self-propelled vehicle that was running in the buffer section disappears, so the operation schedule is reconfigured with another self-propelled vehicle, and when the power returns, the operation schedule is reconfigured again. Inefficiency such as repair.

In addition, when viewed from the ground side control panel, the self-propelled vehicle that has entered the buffer section suddenly disappears, and it may be erroneously detected that an abnormality other than the entry has occurred.
Moreover, the state of the self-propelled vehicle cannot be seen from the ground side control panel.
As a countermeasure against such a problem, there is a method of backing up the power supply of the control system of the self-propelled vehicle with a battery, but there are problems in terms of the cost, weight, placement location, maintenance, and the like of the battery.
The present invention has been made in view of the circumstances as described above, and even when a self-propelled vehicle enters and stops in a buffer section immediately before a branch junction of rails during a rail switching period, a control system is provided. An object of the present invention is to provide a power supply device for an electric self-propelled vehicle in which power supply to the vehicle is not cut off, a return process for restarting traveling is easy, and operation efficiency is not reduced.

  The power feeding device according to the first aspect of the present invention travels on a track while receiving power from the power supply line, and when the track is switched when passing through the branching junction of the track, In a power supply apparatus that supplies electric power from an electric power supply line arranged in a predetermined range of the track to an electric self-propelled vehicle configured to be temporarily prohibited from entering, the power is supplied for a period for switching the track. A circuit for reducing the electric self-propelled vehicle to a value at which it cannot travel is provided.

  In this power supply device, when the track is switched while traveling on the track while receiving power from the power supply line and passing through the branch junction, the entry to the predetermined range of the track immediately before the branch junction is temporarily prohibited. The electric self-propelled vehicle configured as described above is supplied with electric power from a feeder line disposed in a predetermined range of the track. The circuit for lowering the period during which the track is switched reduces the power supplied from the power supply line arranged in a predetermined range to a value at which the electric self-propelled vehicle cannot run.

  A power supply device according to a second aspect of the present invention includes a drive unit for traveling on a track and a control unit that controls driving of the drive unit, while receiving power from a power supply line to supply power to the drive unit and the control unit, respectively. When electric power is supplied to a traveling electric self-propelled vehicle from a power supply line disposed in a predetermined range of the track immediately before the branch junction of the track, and the electric self-propelled vehicle passes through the branch junction In addition, when the track is switched, the power feeding device configured to receive a signal during track operation or an instruction signal from the outside, and to temporarily enter the electric self-propelled vehicle into the predetermined range, A circuit is provided for reducing the power to a range in which the drive unit is inoperable and the control unit is operable when receiving an in-orbit operation signal or an instruction signal.

  In this power supply device, the drive unit travels on a track, the control unit controls the drive unit, and the power is supplied to the drive unit and the control unit. Electric power is supplied from a feeder line disposed in a predetermined range of the track immediately before the branch junction. When an electric self-propelled vehicle passes through a branching / merging point, when the track is switched, the electric self-propelled vehicle is temporarily prohibited from entering the predetermined range in response to an in-track signal or an external instruction signal. The The circuit for reducing the power when the drive unit is inoperable and the control unit operates when power is supplied from the feeder line arranged in a predetermined range when receiving an in-orbit operation signal or an external instruction signal. Reduce to the extent possible.

  According to the first and second inventions, even when the electric self-propelled vehicle enters and stops in the buffer section immediately before the rail junction during the rail switching period, power is supplied to the control system. Therefore, the power supply device for the electric self-propelled vehicle can be realized, in which the return process for restarting the traveling is easy and the operation efficiency is not lowered.

Hereinafter, the present invention will be described with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
FIG. 1 is a block diagram showing a main configuration of an electric self-propelled vehicle to which power is supplied by the first embodiment of the power supply apparatus according to the present invention.
In this electric self-propelled vehicle, the power receiving circuit 1 receives power from the power supply lines A and B through which the high-frequency constant current of the power feeding device flows, by a non-contact power feeding pickup, rectifies the received power, and inverter 2 and DC-DC This is given to the converter 3. The inverter 2 has a built-in control mechanism for the motor 6, converts a given DC voltage into an AC voltage, applies the AC voltage to the motor 6, and rotates it. The motor 6 drives a travel mechanism (not shown).

The DC-DC converter 3 steps down the given DC voltage to a predetermined voltage and gives it to the control device 4 and the DC brake 5. The control device 4 is, for example, a PLC (programmable controller), and controls the inverter 2 and the DC brake 5.
The voltage at which the supply voltage to the inverter 2 is lowered and the inverter 2 is stopped for protection is in an “undervoltage protection” state is, for example, DC 170 to 200 V (120 to 141 V in terms of AC) (depending on the model). . Moreover, the voltage which will be in the "undervoltage protection" state which the supply voltage to DC-DC converter 3 falls and DC-DC converter 3 stops for protection is DC110V (AC conversion 85V), for example.

FIG. 2 is a block diagram showing a main configuration of the first embodiment of the power supply apparatus according to the present invention.
In this power supply apparatus, the control unit 26 transmits and receives to / from a ground-side control panel (not shown) through the transmission / reception unit 25, receives a control signal, and transmits a signal indicating the state of the power supply apparatus. The control unit 26 controls on / off of the high frequency power supply 20 and the high frequency relay 22 based on the control signal.

  A capacitor C1 is connected between both output terminals of the high frequency power supply 20, one terminal of the reactor L1 is connected to one output terminal of the high frequency power supply 20, and one terminal of the capacitor C2 is connected to the other terminal of the reactor L1. The other terminal of the capacitor C <b> 2 is connected to the other output terminal of the high frequency power supply 20. The capacitors C1 and C2 and the reactor L1 constitute a π-CLC type immittance 21 that is a constant voltage circuit. The high frequency power supply 20 and the π-CLC type immittance 21 are connected by two power supply lines A.

One terminal of the step-down resistor 23 and the high frequency relay contact 22a is connected to the other terminal of the reactor L1, and each other terminal is connected to one terminal of the reactor L2.
One terminal of the capacitor C3 and one terminal of the reactor L3 are connected to the other terminal of the reactor L2, and an end terminal of the reactor L3 is connected to the other terminals of the capacitors C2 and C3 through the feeder line B. Yes. The reactors L2 and L3 and the capacitor C3 constitute a T-LCL type immittance 24 that is a constant current circuit. In the π-CLC type immittance 21 that is a constant voltage circuit and the T-LCL type immittance 24 that is a constant current circuit, the value of each element is determined so as to resonate.

  In the power supply apparatus having such a configuration, when the control unit 26 receives a control signal from the ground side control panel and turns on the high frequency relay contact 22a by the high frequency relay 22, the power supply line A and the power supply line The current flowing through B is the same. When the control unit 26 turns off the high-frequency relay contact 22a, the voltage applied to the T-LCL type immittance 24 is lower than the constant voltage output from the π-CLC type immittance 21 that is a constant voltage circuit. The current is reduced by the voltage stepped down by the resistor 23 and the current flowing through the feeder line B is lower than the current flowing through the feeder line A.

FIG. 3 is an explanatory diagram for explaining the operation when the electric self-propelled vehicle shown in FIG. 1 changes the traveling direction at the junction of rails (tracks).
At the junction of the rails, a branch is made from the fixed rail R1 to the fixed rail R2 or the fixed rail R3, and the power supply line A or the power supply line B (see FIG. 2, the high-frequency power source 20 is omitted) along each rail. Is arranged to supply power to an unillustrated (electric type) self-propelled vehicle.
When the self-propelled vehicle travels from the fixed rail R1 to the fixed rail R2, the switching rail R4 connects the fixed rail R1 and the fixed rail R2, and when the self-propelled vehicle branches from the fixed rail R1 to the fixed rail R3, the switching rail R5 Connects the fixed rail R1 and the fixed rail R3. The switching rails R4 and R5 are arranged so as to move together when the connection is switched.

Self-propelled to prevent collision of the self-propelled vehicle with the rail and dropping off from the rail during the period when the switching rails R4 and R5 are moving in order to switch the connection at the portion just before the junction of the fixed rail R1 There is a buffer section that temporarily prohibits entry of cars. During the period in which the switching rails R4 and R5 are moving, the self-propelled vehicle receives a control signal from the ground side control panel and is stopped by the DC brake 5 before the buffer section. Further, the feed current to the feed line B in the buffer section is reduced (however, the feed current to the other feed lines A is not changed).
Thereby, even if the self-propelled vehicle enters the buffer section due to some abnormality during the period when the switching rails R4 and R5 are moving, the vehicle stops in the buffer section.

When reducing the power supply current to the power supply line B in the buffer section, the control unit 26 receives a control signal (instruction signal) from the ground side control panel and receives the control signal from the ground side control panel 22 as described in FIG. The high frequency relay contact 22a is turned off.
Thus, if there is a self-propelled vehicle that has entered the buffer section, the voltage received by the power receiving circuit 1 and rectified and output becomes lower than the voltage at which the inverter 2 enters the “undervoltage protection” state, and the DC -The voltage becomes higher than the voltage at which the DC converter 3 is in the "undervoltage protection" state. As a result, the self-propelled vehicle that has entered enters a state where the inverter 2 and the motor 6 are stopped and the control device 4 and the DC brake 5 are operating.

When the movement of the switching rails R4 and R5 is completed and the rail switching connection is completed, the feeding current to the feeding line B in the buffer section is restored, and the self-propelled vehicle that has entered and stopped starts to run again.
When restoring the power supply current to the power supply line B in the buffer section, the control unit 26 receives a control signal from the ground side control panel and receives the high frequency relay contact by the high frequency relay 22 as described in FIG. Turn on 22a.

FIG. 4 is a block diagram showing another main configuration of the power feeding device according to the first embodiment of the present invention.
In this power feeding device, a reactor L4 is connected in parallel to a high frequency relay contact 22a in place of the step-down resistor 23. Other configurations are the same as those of the power supply apparatus shown in FIG. A capacitor may be connected instead of the reactor L4.

In the power supply apparatus having such a configuration, when the control unit 26 receives a control signal from the ground side control panel and turns on the high frequency relay contact 22a by the high frequency relay 22, the power supply line A and the power supply line The current flowing through B is the same. When the control unit 26 turns off the high-frequency relay contact 22a, the reactor L4 does not resonate because the resonance conditions of the T-LCL immittance 24 and the π-CLC immittance 21 are removed. Accordingly, the voltage of the feeder line B is reduced by the combined impedance of the reactor L4, the T-LCL type immittance 24, and the π-CLC type immittance 21, and the flowing current is also lower than that of the feeder line A.
The operation of such a power feeding device when the electric self-propelled vehicle shown in FIG. 1 changes the traveling direction at the junction of the rails (tracks) is the same as the operation described in FIGS. Is omitted.

FIG. 5 is a block diagram showing another main configuration of the power supply device according to the first embodiment of the present invention.
In this power supply apparatus, the control unit 26 transmits and receives to / from a ground-side control panel (not shown) through the transmission / reception unit 25, receives a control signal, and transmits a signal indicating the state of the power supply apparatus. The control unit 26 controls on / off of the high frequency power supply 20 and the high frequency relay 22 based on the control signal.
In addition, a power supply line is connected between both output terminals of the high frequency power supply 20 as a power supply line A-power supply line B-power supply line A, and between the connection nodes of the power supply line A and the power supply line B, Relay contact 22b and reactor L5 are connected in series.

In the power supply apparatus having such a configuration, when the control unit 26 receives a control signal from the ground side control panel and turns off the high frequency relay contact 22b by the high frequency relay 22, the power supply line A and the power supply line The current flowing through B is the same. When the control unit 26 turns on the high-frequency relay contact 22b, the current flowing through the feeder line A and the feeder line B is shunted by the reactor L5, and the current flowing through the feeder line B is lower than that of the feeder line A. To do.
The operation of such a power feeding device when the electric self-propelled vehicle shown in FIG. 1 changes the traveling direction at the junction of the rails (tracks) is the same as the operation described in FIGS. Is omitted.

FIG. 6 is a block diagram showing another main configuration of the power feeding device according to the first embodiment of the present invention.
In this power feeding apparatus, the control unit 27 transmits and receives to / from a ground-side control panel (not shown) through the transmission / reception unit 25, receives a control signal, and transmits a signal indicating the state of the power feeding apparatus. The control unit 27 controls the high frequency power supply 20 and the high frequency power supply 30 based on the control signal. The high frequency power supply 20 supplies power to the feeder line A, and the high frequency power supply 30 supplies power to the feeder line B.

In the power supply apparatus having such a configuration, the control unit 27 normally controls the high-frequency power supply 20 and the high-frequency power supply 30 so that the same current flows through the power supply line A and the power supply line B. When the control unit 27 receives a control signal from the ground side control panel, the control unit 27 controls only the high-frequency power source 30 so that the current flowing through the feeder line B decreases.
The operation of such a power feeding device when the electric self-propelled vehicle shown in FIG. 1 changes the traveling direction at the junction of the rails (tracks) is the same as the operation described in FIGS. Is omitted.

(Embodiment 2)
FIG. 7 is a block diagram showing a main configuration of an electric self-propelled vehicle to which power is supplied by the second embodiment of the power supply device according to the present invention.
In this electric self-propelled vehicle, the current collector 11 receives power from a trolley-type pickup from trolley wires (feed wires) C and D to which a three-phase commercial frequency constant voltage of a power feeding device is applied. Electric power is supplied to the inverter 12, and single-phase AC of the received three-phase AC power is supplied to the AC-DC converter 13. The inverter 12 has a built-in bridge rectifier circuit and a control mechanism for the motor 16, converts a given three-phase AC voltage into a DC voltage, converts the converted DC voltage into an AC voltage, and applies it to the motor 16. And rotate. The motor 16 drives a travel mechanism (not shown).

  The AC-DC converter 13 converts the supplied single-phase AC voltage into a predetermined DC voltage, and supplies it to the control device 14 and the DC brake 15. The control device 14 is a PLC (programmable controller), for example, and controls the inverter 12 and the DC brake 15.

FIG. 8 is a block diagram showing a main configuration of the power supply device according to the second embodiment of the present invention.
In this power feeding apparatus, the control unit 28 transmits / receives to / from a ground-side control panel (not shown) through the transmitting / receiving unit 25, receives a control signal, and transmits a signal indicating the state of the power feeding apparatus. Based on the control signal, the control unit 28 performs on / off control of the switch SW inserted in the V phase of the three-phase power supply line connected to the three-phase commercial frequency power supply 40. Among the power supply lines connected to the three-phase commercial frequency power supply 40, the power supply line (trolley line) C is defined between the three-phase commercial frequency power supply 40 and the switch SW, and the power supply line (trolley line) D is provided beyond the switch SW.

  In the power supply apparatus having such a configuration, the control unit 28 normally turns on the switch SW to supply a three-phase alternating current to the power supply line D. When the control unit 28 receives a control signal from the ground side control panel, the control unit 28 turns off the switch SW so that the single-phase alternating current is supplied to the power supply line D, and the inverter 12 is in the “open phase detection protection” state. Or set to “undervoltage protection” status. In this state, if there is a self-propelled vehicle that enters the buffer section in which the power supply line D is disposed due to an abnormality, the control device 14 (PLC) performs “open phase detection protection” or “undervoltage protection”. The self-propelled vehicle stops in response to the protection signal.

The operation of such a power supply apparatus when the electric self-propelled vehicle shown in FIG. 7 changes the traveling direction at the junction of the rails (tracks) is the same as the operation described in FIG. A and B are read as feeder lines C and D).
When supplying power to the feeder line D in the buffer section as a single phase, the control unit 28 receives the control signal (instruction signal) from the ground side control panel and turns off the switch SW as described in FIG. To.

As a result, if there is a self-propelled vehicle that has entered the buffer section, the voltage that is received and output by the current collector 11 is the inverter 12 in the “open phase detection protection” state or the “undervoltage protection” state. The voltage becomes lower than the voltage, and becomes higher than the voltage at which the AC-DC converter 13 enters the “undervoltage protection” state. As a result, the self-propelled vehicle that has entered enters a state where the inverter 12 and the motor 16 are stopped and the control device 14 and the DC brake 15 are operating.
When restoring the feed current to the feed line D in the buffer section, the control unit 28 receives the control signal from the ground side control panel and turns on the switch SW as described in FIG.

It is a block diagram which shows the principal part structure of the electric self-propelled vehicle which embodiment of the electric power feeder which concerns on this invention supplies electric power. It is a block diagram which shows the principal part structure of embodiment of the electric power feeder which concerns on this invention. It is explanatory drawing for demonstrating operation | movement in case the electrically-driven self-propelled vehicle shown in FIG. 1 changes a advancing direction at the branch junction of a rail (track). It is a block diagram which shows the other principal part structure of embodiment of the electric power feeder which concerns on this invention. It is a block diagram which shows the other principal part structure of embodiment of the electric power feeder which concerns on this invention. It is a block diagram which shows the other principal part structure of embodiment of the electric power feeder which concerns on this invention. It is a block diagram which shows the principal part structure of the electric self-propelled vehicle which embodiment of the electric power feeder which concerns on this invention supplies electric power. It is a block diagram which shows the principal part structure of embodiment of the electric power feeder which concerns on this invention. It is explanatory drawing for demonstrating operation | movement in the case of the conventional electrically-driven self-propelled vehicle changing a advancing direction at the branch junction of a rail (track).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power receiving circuit 2,12 Inverter 3 DC-DC converter 4,14 Control apparatus 6,16 Motor 11 Current collection part 13 AC-DC converter 20, 30 High frequency power supply 21 (pi) -CLC type immittance 22 High frequency relay 22a, 22b High frequency relay Contact 23 Step-down resistor 24 T-LCL type immittance 25 Transmitter / receiver 26, 27, 28 Control unit 40 Three-phase commercial frequency power supply A, B Power supply line C, D Power supply line (trolley line)
C1, C2, C3 Capacitor L1, L2, L3 Reactor L5 Shunt reactor R1, R2, R3 Fixed rail R4, R5 Switching rail SW switch

Claims (2)

When traveling on a track while receiving power from a power supply line and passing through a branching / merging point of the track, if the track is switched, entry to a predetermined range of the track immediately before the branching / merging point is temporarily prohibited. In the power supply apparatus for supplying electric power to the electric self-propelled vehicle that is supplied from a power supply line disposed in a predetermined range of the track,
A power supply apparatus comprising: a circuit for reducing the electric power to a value at which the electric self-propelled vehicle cannot travel during a period for switching the track. An electric self-propelled vehicle that has a drive unit for traveling on a track and a control unit that drives and controls the drive unit, and that travels while receiving power from a power supply line to supply power to the drive unit and the control unit, When electric power is supplied from a feeder line arranged in a predetermined range of the track immediately before the branch junction point of the track and the electric self-propelled vehicle passes through the branch junction point, the track is switched. In the power feeding device configured to receive an operating signal or an instruction signal from the outside and to temporarily enter the electric self-propelled vehicle into the predetermined range,
And a circuit for reducing the power to a range where the drive unit is inoperable and the control unit is operable when the orbital operation signal or instruction signal is received. Power supply device.

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