JP2009126430A - Non-contact electricity feeding system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact electricity feeding system capable of preventing stopping of a movement body by failure or the like of a power source for flowing a current to an electricity feeding wire. <P>SOLUTION: The non-contact electricity feeding system 1 is provided with: the electricity feeding wires 4-6; high frequency power sources 7-9 for flowing a current to the electricity feeding wires 4-6 respectively; the movement body 2 moved along the electricity feeding wires 4-6 while obtaining electric power from the electricity feeding wires 4-6 at non-contact; and a ground controller 10 for controlling action of the movement body 2. The ground controller 10 restricts the action of the movement body 2 when the current does not flow in at least one electricity feeding wire of the electricity feeding wires 4-6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a non-contact power supply system that operates a moving body with electric power supplied from a power supply line in a non-contact manner.

FIG. 6A is a diagram illustrating a conventional non-contact power feeding system.
A non-contact power feeding system 60 shown in FIG. 6A includes a moving body (machine base) 61, a rail 62 provided along the moving path of the moving body 61, and a non-contact with the moving body 61 provided on the rail 62. Are provided with a power supply line 63 for supplying electric power, a high-frequency power source 64 for supplying a high-frequency current to the power supply line 63, and a ground controller 65 for controlling the operation of the moving body 61.

The moving body 61 includes a pickup core 66 and a control circuit 67.
FIG. 6B is a cross-sectional view of the pickup core 66 shown in FIG.

  As shown in FIG. 6B, the pickup core 66 is formed so as to surround the power supply line 63 and picks up magnetic flux generated by the current flowing through the power supply line 63. When a current flows through the pickup core 66 by the magnetic flux picked up by the pickup core 66, electric power is supplied to the moving body 61, and the moving body 61 moves along the rail 62 by the supplied electric power. The mobile body 61 and the ground controller 65 exchange data with each other by an optical communication device or the like, and the control circuit 67 controls the operation of the mobile body 61 based on a control signal transmitted from the ground controller 65 to the mobile body 61. When the ground controller 65 receives, for example, data indicating the current state (position, etc.) of the moving body 61 transmitted from the moving body 61, the ground controller 65 obtains the next scheduled operation of the moving body 61 based on the data. A control signal for causing the moving body 61 to perform the operation is transmitted to the moving body 61.

As described above, the contactless power supply system 60 is configured such that the moving body 61 and the power supply line 63 for supplying power to the mobile body 61 are not in contact with each other, so that dust is generated between the mobile body 61 and the power supply line 63. It can be prevented from being generated (see, for example, Patent Document 1).
JP 2002-338150 A

  However, in the non-contact power supply system 60, when the high frequency power supply 64 fails and no current flows through the power supply line 63, power is not supplied to the moving body 61 and the moving body 61 stops.

  Accordingly, an object of the present invention is to provide a non-contact power feeding system capable of preventing a moving body from being stopped due to a failure of a power source for causing a current to flow through a power feeding line.

In order to solve the above problems, the present invention adopts the following configuration.
That is, the non-contact power feeding system of the present invention includes a plurality of power feeding lines, a moving body that simultaneously obtains and moves power from each of the plurality of power feeding lines in a non-contact manner, and a control device that controls the operation of the moving body. And the control device restricts the operation of the moving body when no current flows through at least one of the plurality of power supply lines.

  As a result, when the current stops flowing in a certain power supply line, the mobile object can be continuously operated by the current flowing in the remaining power supply line, so that the mobile object is caused by a failure of the power source for supplying current to the power supply line. Can be stopped.

Further, the control device may be configured to limit the operation of the moving body in accordance with an operation scheduled for the moving body.
Thereby, since electric power is not supplied to a moving body more than necessary, the consumption of the electric power of the whole non-contact electric power feeding system can be suppressed.

In addition, the control device may be configured to individually limit the operations of the plurality of moving bodies that move while simultaneously obtaining power from the plurality of power supply lines.
Thereby, in the case where a plurality of moving bodies are operated, the transfer efficiency of the moving bodies can be increased as compared with the case where the operations of all the moving bodies are similarly restricted.

  Further, in the non-contact power supply system, the control device includes a plurality of power supplies for supplying current to each of the plurality of power supply lines, and the plurality of power supplies determines that the current cannot be supplied to the power supply lines. When the control device receives the abnormal signal, the control device transmits a power limit signal to the mobile unit. When the mobile unit receives the power limit signal, the control unit limits its operation. You may comprise.

  Further, the control device may be configured to reduce the maximum speed or acceleration of the moving body when current stops flowing to at least one of the plurality of power supply lines.

  ADVANTAGE OF THE INVENTION According to this invention, the stop of a moving body by the failure of the power supply for flowing an electric current through a feed line, etc. can be prevented in the non-contact electric power feeding system with which electric power is supplied to a moving body from a feed line.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating a contactless power feeding system according to an embodiment of the present invention.
A non-contact power feeding system 1 shown in FIG. 1 includes a moving body (machine base) 2, a rail 3 provided along a moving path of the moving body 2, and a non-contacting arrangement that is disposed along the rail 3. To the power supply lines 4 to 6 for supplying power, a high-frequency power supply 7 (power supply) for supplying a high-frequency current to the power supply line 4, a high-frequency power supply 8 (power supply) for supplying a high-frequency current to the power supply line 5, A high-frequency power source 9 (power source) for supplying a high-frequency current and a ground controller 10 (control device) for controlling the operation of the moving body 2 are provided. Although only one moving body 2 is shown in FIG. 1, power is supplied to each of the plurality of moving bodies 2 through the power supply lines 4 to 6, and each moving body 2 performs the same operation by the ground controller 10. It may be controlled as follows. Moreover, the ground controller 10 shall perform operation control of each mobile body 2 so that electric power required by the whole non-contact electric power feeding system 1 may become less than the sum total output electric power of the high frequency power supplies 7-9. Also, the currents flowing through the feeder lines 4 to 6 are equal to each other.

  The moving body 2 includes pickup cores 11 to 13 and a control circuit 14. The pickup core 11 generates a magnetic flux generated by the current flowing through the feeder line 4, the pickup core 12 generates a magnetic flux generated by the current flowing through the feeder line 5, and the pickup core 13 generates a magnetic flux generated by the current flowing through the feeder line 6, respectively. Pick up. When current flows through the pickup cores 11 to 13 by the magnetic fluxes picked up by the pickup cores 11 to 13, respectively, electric power is supplied to the moving body 2, and the moving body 2 moves along the rail 3 by the supplied electric power. . The mobile unit 2 and the ground controller 10 exchange data with each other by an optical communication device or the like, and the control circuit 14 controls the operation of the mobile unit 2 based on a control signal transmitted from the ground controller 10 to the mobile unit 2. For example, when the ground controller 10 receives data indicating the current state (position, etc.) of the mobile body 2 transmitted from the mobile body 2, the ground controller 10 obtains the next scheduled motion of the mobile body 2 based on the data, A control signal for causing the moving body 2 to perform the operation is transmitted to the moving body 2.

FIG. 2 is a sequence diagram showing the operation of the non-contact power feeding system 1.
First, when it is determined that any one of the high frequency power supplies 7 to 9 can no longer supply current to the power supply line due to a failure or the like (Yes in step S1), the high frequency power supply transmits an abnormal signal to the ground controller 10 ( Step S2).

  Next, when the ground controller 10 receives the abnormal signal (Yes in step S3), the power limit signal for ensuring that the power required for the entire non-contact power feeding system 1 is within the power obtained from the remaining power feeding lines. Is transmitted to the mobile unit 2 (step S4).

And the mobile body 2 will perform operation | movement control which restrict | limits own operation | movement, if a power limiting signal is received (step S5 is Yes) (step S6).
For example, when only the high frequency power supply 7 fails and no current flows through the power supply line 4, the high frequency power supply 7 transmits an abnormal signal indicating the power supply line 4 at which no current flows to the ground controller 10. Then, the ground controller 10 obtains a power limit signal corresponding to the abnormal signal from a data table in which a power supply line (or an abnormal signal indicating the current) in which current is not flowing is associated with the power limit signal, The obtained power limit signal is transmitted to the mobile unit 2 using an optical communication device or the like. When the mobile unit 2 receives the power limit signal, the control circuit 14 of the mobile unit 2 sets the maximum speed so that the mobile unit 2 can continue the operation with the electric power obtained from the currents flowing through the feeder lines 5 and 6, respectively. (E.g., when a current limit signal is transmitted from the ground controller 10 to the moving body 2 when the current stops flowing only to the feeding line 4, the control circuit 14 of the moving body 2 6) The maximum speed and acceleration are lowered so that the power consumption of the moving body 2 is two-thirds compared to the case where the current flows through all of the six.

  When the ground controller 10 receives the abnormal signal, a power limit signal indicating a power supply line in which no current flows is transmitted from the ground controller 10 to the mobile body 2. When the mobile body 2 receives the power limit signal, the mobile body Two control circuits 14 may be configured to limit the operation of the moving body 2 based on the data table.

  According to the non-contact power feeding system 1 that performs the operation shown in FIG. 2, power is supplied to the moving body 2 using the high frequency power sources 7 to 9 and the power feeding lines 4 to 6, and the power feeding line 4 is caused by a failure of the high frequency power source or the like. Since the mobile body 2 can be continuously operated by the current flowing through the remaining power supply lines when the current stops flowing through at least one of the power supply lines among ˜6, the mobile body 2 is stopped due to a failure of the high frequency power supply. Can be prevented.

  In the non-contact power feeding system 1 that performs the operation shown in FIG. 2, when a plurality of moving bodies 2 are operated, if no current flows through a certain feeding line, the power supplied to each moving body 2 decreases. The same operation control is performed on each mobile unit 2 so that the necessary power of the entire contactless power feeding system 1 falls within the supplied power. At this time, when the power (transport load factor) necessary for the operation for each moving body 2 with respect to the total power is known, by performing individual operation control according to the transport load factor of each mobile body 2, Not only can the non-contact power feeding system 1 be continuously operated, but also the non-contact power feeding system 1 with high transport efficiency of the moving body 2 can be realized.

  In the non-contact power feeding system 1 that performs the operation illustrated in FIG. 2, a control signal transmitted from the ground controller 10 to each moving body 2 (for example, a control signal indicating an instruction for moving the moving body 2 from the shelf A to the shelf B). ) Is used to control the operation of each moving body 2. Therefore, depending on the content of the control signal, the operating rate of each moving body 2 may be different, or there may be a moving body 2 that does not perform a transporting operation, and the transport load factor of each moving body 2 is different.

  Therefore, when the current stops flowing through a certain power supply line, the non-contact power supply system 1 can be continuously operated and moved by controlling the operation of the mobile body 2 individually according to the transport load factor of each mobile body 2. The non-contact electric power feeding system 1 with high conveyance efficiency of the body 2 can be realized.

  FIG. 3 is a sequence diagram showing the operation of the non-contact power feeding system when the operation of the mobile body 2 is individually controlled according to the conveyance load factor of each mobile body 2. The hardware configuration of the non-contact power feeding system in FIG. 3 is the same as the hardware configuration of the non-contact power feeding system 1 shown in FIG. 1, and each electric power obtained by the power feeding lines 4 to 6 is simultaneously sent to a plurality of moving bodies 2. Shall be supplied.

  First, when it is determined that any one of the high frequency power supplies 7 to 9 can no longer pass a current through the power supply line due to a failure or the like (Yes in step ST1), the high frequency power supply transmits an abnormal signal to the ground controller 10 ( Step ST2).

  Next, when the ground controller 10 receives the abnormal signal (Yes in step ST3), the ground controller 10 moves based on the abnormal signal and the transportation plan of each moving body 2 (which indicates which moving body moves to where). A power limit signal is obtained for each body 2 (step ST4), and these power limit signals are transmitted to the corresponding mobile bodies 2 (step ST5).

Next, when each mobile unit 2 receives the power limit signal (step ST6 is Yes), each mobile unit 2 performs operation control for limiting its own operation (step ST7).
For example, when only the high frequency power supply 7 fails and no current flows through the power supply line 4, the high frequency power supply 7 transmits an abnormal signal indicating that the current cannot flow through the power supply line 4 to the ground controller 10. Then, the ground controller 10 makes the necessary power in the contactless power supply system 1 as a whole within the power obtained from the power supply lines 5 and 6 based on the abnormality signal, and based on the transportation plan of each mobile unit 2. Thus, the respective transport load factors of the respective mobile units 2 are obtained, and power limit signals corresponding to the respective transport load factors are transmitted to the respective mobile units 2 using an optical communication device or the like.

  Each mobile unit 2 may continue to operate with electric power obtained from the currents flowing through the power supply lines 5 and 6, respectively, with the maximum speed and acceleration being reduced by the control circuit 14 based on the received power limit signal. Lower operating specs as possible.

For example, let us consider a case where the moving objects A to D are operating in the non-contact power supply system 1.
The ground controller 10 obtains the transport load factor of each of the moving bodies A to D at the time when the abnormal signal is received based on the abnormal signal, the transport plan of the mobile bodies A to D, and the like.

  When the transfer load factor of the moving object A is 100%, the transfer load factor of the moving object B is 80%, the transfer load factor of the moving object C is 50%, and the transfer load factor of the moving object D is 20%, the ground controller 10 transmits a power limit signal a corresponding to a transport load factor of 100% to the mobile unit A, transmits a power limit signal b corresponding to a transport load factor of 80% to the mobile unit B, and corresponds to a transport load factor of 50%. The power limit signal c to be transmitted is transmitted to the mobile unit C, and the power limit signal d corresponding to the carrier load factor of 20% is transmitted to the mobile unit D. Note that the ground controller 10 obtains a power limit signal corresponding to a transport load factor obtained by an abnormal signal, a transport plan, or the like, based on a data table in which the transport load factor and the power limit signal are associated with each other.

  FIG. 4 is a diagram illustrating an example of a data table included in the mobile objects A to D. As illustrated in FIG. It is assumed that the moving bodies A to D are operating at the maximum speed V, the acceleration a, and the acceleration time s until receiving the power limit signals a to d.

  When receiving the power limit signal a, the control circuit 14 of the moving object A controls the operation of the moving object A so that the maximum speed is V, the acceleration is a, the acceleration time is s, and the power consumption is P1. That is, when receiving the power limit signal a, the control circuit 14 of the moving object A controls the operation of the moving object A so as not to change the maximum speed, acceleration, and acceleration time.

  When the control circuit 14 of the moving body B receives the power limit signal b, the control circuit 14 of the moving body B operates the moving body B so that the maximum speed is V, the acceleration is a / 2, the acceleration time is 2 seconds, and the power consumption is P2. Control. In other words, when receiving the power limit signal b, the control circuit 14 of the moving body B controls the operation of the moving body B so that the acceleration is halved and the acceleration time is doubled.

  When the control circuit 14 of the moving object C receives the power limit signal c, the control circuit 14 of the moving object C operates the moving object C so that the maximum speed is V / 2, the acceleration is a, the acceleration time is s, and the power consumption is P3. Control. That is, when receiving the power limit signal c, the control circuit 14 of the moving object C controls the operation of the moving object C so that the maximum speed is halved.

  In addition, when the control circuit 14 of the moving body D receives the power limit signal d, the moving body D is configured so that the maximum speed is V / 2, the acceleration is a / 2, the acceleration time is 2 s, and the power consumption is P4. To control the operation. That is, when receiving the power limit signal d, the control circuit 14 of the moving body D operates the moving body D so that the maximum speed is halved, the acceleration is halved, and the acceleration time is doubled. Control.

  According to the non-contact power feeding system 1 that performs the operation of FIG. 3, similarly to the non-contact power feeding system 1 that performs the operation of FIG. 2, power is supplied to the moving body 2 using the high-frequency power sources 7 to 9 and the feeder lines 4 to 6. When the current is not supplied to at least one of the power supply lines 4 to 6 due to a failure of the high frequency power supply or the like, the moving body 2 can be continuously operated by the current flowing through the remaining power supply lines. Therefore, it is possible to prevent the moving body 2 from being stopped due to a failure of the high frequency power supply.

  In addition, according to the non-contact power feeding system 1 that performs the operation of FIG. 3, since the operation control of each mobile body 2 is performed for each transport load factor of each mobile body 2, Thus, the operation can be restricted as compared with the moving body 2 having a high conveyance load factor. Therefore, the movable body 2 having a higher conveyance load factor can be sufficiently operated, and the non-contact power feeding system 1 having a high conveyance efficiency of the movable body 2 can be realized. Further, when only one moving body 2 is operating, power is not supplied to the moving body 2 more than necessary, so that power consumption of the entire non-contact power feeding system 1 can be suppressed.

Moreover, in the non-contact electric power feeding system 1 of this embodiment, you may comprise so that operation | movement of each mobile body 2 may be restrict | limited individually only when each operation | movement of each mobile body 2 is known.
FIG. 5 is a flowchart showing an operation flow of the non-contact power feeding system 1 configured as described above. The hardware configuration of the non-contact power supply system in FIG. 5 is the same as the hardware configuration of the non-contact power supply system 1 shown in FIG. 1, and each power obtained by the power supply lines 4 to 6 is simultaneously sent to a plurality of moving bodies 2. Shall be supplied.

  First, when each of the high frequency power supplies 7 to 9 determines that the current cannot be supplied to the power supply line due to its own failure or the like (Yes in step STP1), it transmits an abnormal signal to the ground controller 10 (step STP2).

  Next, when the ground controller 10 receives the abnormal signal, the ground controller 10 determines whether or not the transport load factor of each mobile body 2 can be obtained (step STP3). For example, when the ground controller 10 can grasp the operation of each moving body 2 by a transportation plan or the like, the ground controller 10 determines that each transportation load factor of each moving body 2 can be obtained, and the transportation plan or the like is not known. When the operation of each moving body 2 cannot be grasped, it is determined that the respective transport load factors of each moving body 2 cannot be obtained.

  If the ground controller 10 determines that the respective transport load factors of the respective mobile bodies 2 cannot be obtained (No at Step STP3), the same power limit signal is transmitted to each mobile body 2 (Step STP3). STP4). The description of the operation of the ground controller 10 when transmitting the same power limit signal to each mobile unit 2 is the same as the operation described in FIG.

  Further, when the ground controller 10 determines that the respective transport load factors of the respective mobile units 2 can be obtained (Yes in step STP3), the power limit signal (for example, The power limit signals a to d) are transmitted (step STP5). The description of the operation of the ground controller 10 when transmitting the power limit signal individually to each mobile unit 2 is the same as the operation described in FIG.

In the above embodiment, the number of high-frequency power supplies and feeder lines may be two or four or more.
In the above embodiment, the control circuit 14 may limit operations other than the maximum speed and acceleration of the moving body 2.

  Moreover, in the said embodiment, although the mobile body 2 and the ground controller 10 are the structures which mutually transmit / receive data using an optical communication apparatus, the communication system between the mobile body 2 and the ground controller 10 is not specifically limited. For example, data may be transmitted and received between the moving body 2 and the ground controller 10 by superimposing data on a high-frequency current flowing through the feeder lines 4 to 6.

It is a figure which shows the non-contact electric power feeding system of embodiment of this invention. It is a sequence diagram which shows operation | movement of the non-contact electric power feeding system of embodiment of this invention. It is a sequence diagram which shows operation | movement of the non-contact electric power feeding system of other embodiment of this invention. It is a figure which shows an example of the data table with which each moving body is equipped. It is a flowchart which shows the flow of operation | movement of the non-contact electric power feeding system of other embodiment of this invention. It is a figure which shows the conventional non-contact electric power feeding system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Non-contact electric power feeding system 2 Moving body 3 Rail 4 Feeding line 5 Feeding line 6 Feeding line 7 High frequency power supply 8 High frequency power supply 9 High frequency power supply 10 Ground controller 11 Pickup core 12 Pickup core 13 Pickup core 14 Control circuit 60 Noncontact electric power feeding system 61 Body 62 Rail 63 Feed line 64 High frequency power supply 65 Ground controller 66 Pickup core 67 Control circuit

Claims (5)

A plurality of feeders;
A moving body that obtains and moves electric power simultaneously from each of the plurality of feeder lines in a non-contact manner;
A control device for controlling the operation of the moving body;
With
The control device restricts the operation of the moving body when no current flows in at least one of the plurality of power supply lines.
A non-contact power feeding system characterized by that. The contactless power supply system according to claim 1,
The control device restricts the operation of the moving body in accordance with a scheduled operation in the moving body.
A non-contact power feeding system characterized by that. It is a non-contact electric power feeding system according to claim 1 or 2,
The control device individually restricts the operations of the plurality of moving bodies that move by simultaneously obtaining power from the plurality of power supply lines,
A non-contact power feeding system characterized by that. It is a non-contact electric power feeding system given in any 1 paragraph of Claims 1-3,
A plurality of power supplies for supplying current to each of the plurality of feeder lines;
When each of the plurality of power supplies determines that the current cannot be supplied to the power supply line, it transmits an abnormal signal to the control device,
When the control device receives the abnormal signal, the control device transmits a power limit signal to the mobile body,
When the mobile unit receives the power limit signal, the mobile unit limits its operation.
A non-contact power feeding system characterized by that. It is a non-contact electric power feeding system given in any 1 paragraph of Claims 1-4,
The control device reduces the maximum speed or acceleration of the moving body when current stops flowing to at least one of the plurality of power supply lines.
A non-contact power feeding system characterized by that.

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