JP3909550B2 - Non-contact power supply equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a contactless power supply facility for a carrier vehicle by electromagnetic induction, and in particular, by suppressing leakage magnetic flux of a power supply line, heat generation and power loss generated by eddy current of the leakage magnetic flux is reduced, and power supply characteristics are stabilized. It is related with the non-contact electric power feeding equipment which can be made to do.
[0002]
[Prior art]
For example, in a semiconductor manufacturing factory or the like, an automatic guided vehicle is used to transport parts and the like in a clean environment, but in order to perform power feeding to a traveling carriage of the automatic guided vehicle without generating dust, Power is supplied by contact.
In the conventional non-contact power supply equipment, a power supply line is laid along a preset traveling rail, a high-frequency power supply device is connected to the power supply line, a high-frequency current flows, and electromagnetic waves are picked up via a pickup coil provided on the carrier vehicle side. Electric power is supplied by induction.
The feeder line is supported on the structural material of the building or rail by a support member made of an insulator at predetermined intervals along the length direction thereof, and the groove of the E-type core of the pickup coil on the transport vehicle side Is inserted in a non-contact state.
[0003]
[Problems to be solved by the invention]
By the way, in the conventional non-contact power supply equipment, the support member of the power supply line is generally attached to the structural material via the mounting seat of the metal conductor, and this mounting seat of the conductor is the opening of the core of the pickup coil Since the mounting seat is heated by the eddy current due to the leakage magnetic flux of the feeder line, the power loss is increased, the inductance of the pickup coil is changed, and the feeding performance is changed. There was a problem.
[0004]
Also, if there is a conductor at the position facing the pickup coil at the stop position of the transport vehicle, the conductor will generate heat due to eddy current, increasing the power loss and changing the inductance of the pickup coil, thereby improving the power feeding performance. There were problems such as changes.
[0005]
In view of the problems of the conventional non-contact power supply equipment, the present invention suppresses the magnetic flux leakage of the power supply line, thereby reducing heat generation and power loss caused by the eddy current of the magnetic flux leakage and stabilizing the power supply characteristics. It is an object of the present invention to provide a non-contact power supply facility that can be made to operate.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the non-contact power feeding facility according to the first aspect of the present invention is constructed along a traveling rail, and generates electric power by electromagnetic induction through a power feeding line for passing a high-frequency current and a pickup coil provided on the carrier side. In a non-contact power supply facility including a power receiving device that receives power, a mounting seat for fixing a support member of a power supply line is not provided at least at a position facing a core of a pickup coil.
[0007]
In this non-contact power supply equipment, since the mounting seat for fixing the support member of the power supply line is not provided at least at a position facing the core of the pickup coil, heat generation of the mounting seat due to eddy current of leakage magnetic flux is prevented. At the same time, the power loss can be reduced, and the inductance of the pickup coil can be stabilized to stabilize the power feeding characteristics.
[0008]
Further, the non-contact power feeding facility of the second invention is a power receiving device that is laid along the traveling rail and receives power supply by electromagnetic induction via a power feeding line for passing a high-frequency current and a pickup coil provided on the carrier vehicle side. In the non-contact power supply equipment provided with the mounting seat, the mounting seat made of a conductor for fixing the support member of the power supply line is intermittently provided at a pitch larger than the length of the core of the pickup coil. It is characterized in that it is disposed at a position not facing the core at the station stop position.
[0009]
In this non-contact power supply facility, a mounting seat made of a conductor for fixing a support member of the power supply line is intermittently provided at a pitch larger than the length of the core of the pickup coil, and the mounting seat is provided at a station stop position of the transport vehicle. In particular, when the station of the transport vehicle is stopped, the mounting seat is prevented from being heated due to the eddy current of the leakage magnetic flux, and the loss of power is reduced. It is possible to stabilize the power feeding characteristics by stabilizing the inductance.
[0010]
In the case of the non-contact power supply facility according to the second aspect of the present invention , a conductor detection sensor for detecting a conductor is provided in the transport vehicle, and the control device performs stop control of the transport vehicle based on the detection result of the conductor detection sensor. Thus, the transport vehicle can be stopped so that the mounting seat is not located at the facing position of the core.
[0011]
This prevents heat generation of the mounting seat due to the eddy current of the leakage magnetic flux even when the transport vehicle is temporarily stopped, reduces power loss, and stabilizes the pickup coil inductance and stabilizes the feeding characteristics. Can do.
[0012]
Furthermore, the interval between the mounting seat and the core can be made equal to or greater than the groove width of the opening of the core.
[0013]
Thereby, even if the mounting seat is a conductor, heat generation due to the eddy current of the leakage magnetic flux can be suppressed, and power loss can be reduced.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the non-contact power supply facility of the present invention will be described with reference to the drawings.
[0015]
FIG. 1 shows a first embodiment of the non-contact power supply equipment of the present invention.
This non-contact power supply facility is laid along the traveling rail 1 and has a power supply line 2 for passing a high-frequency current, and a power receiving device 5 that receives power supply by electromagnetic induction via a pickup coil 4 provided on the side of the carrier 3. It has.
The feeder 2 is supported by the support member 6 so as to be positioned in the groove 7a of the opening of the E-type core 7 around which the pickup coil 4 is wound. The power supply line 2 is supported so as to be located behind half of the groove 7 a of the core 7.
In addition, a plurality of pickup coils 4 are arranged on the transport vehicle 3 at predetermined intervals.
[0016]
The support member 6 includes two vertical columns 6a that respectively support the two power supply lines 2 and horizontal columns 6b that connect these columns 6a, and the entire support member is formed of an insulator.
The support member 6 is fixed to the structural material 9 of the building via the mounting seat 8. In this embodiment, the mounting seat 8 is not provided at a position facing the core 7 of the pickup coil 4. At the same time, the horizontal struts 6b of the support member 6 are extended correspondingly.
[0017]
By the way, generally, when a high-frequency current is passed through a feeder line and power is received by a pickup coil, if there is a conductor so as to face the opening side of the core, for example, as shown in FIGS. The inductance L varies greatly. (In FIG. 6, when the inductance of the coil decreases, the resonance point shifts and the output voltage decreases from A to B.)
For this reason, for example, in the power receiving circuit as shown in FIG. 8, the resonance points of the resonance circuits C1 and C2 change, the power feeding efficiency is lowered, and an overcurrent is generated in the conductor due to the leakage magnetic flux on the core opening side. The conductor is heated.
In addition, when there is a conductor at a position facing the core, power loss occurs due to overcurrent, but the loss is the smallest when there is no conductor facing the core, although it depends on the distance from the core.
[0018]
On the other hand, in the non-contact power supply facility of the first embodiment of the present invention, the mounting seat 8 for fixing the support member 6 of the power supply line 2 is not provided at a position facing the core 7 of the pickup coil 4. Therefore, heat generation of the mounting seat 8 due to the eddy current of the leakage magnetic flux can be prevented, power loss can be reduced, and further, the inductance of the pickup coil 4 can be stabilized and the power feeding characteristics can be stabilized.
[0019]
Next, a reference example of the non-contact power supply facility will be described with reference to FIGS.
As in the first embodiment, the non-contact power supply facility of this reference example is electromagnetically laid along the traveling rail 1 through a power supply line 2 for flowing a high-frequency current and a pickup coil 4 provided on the side of the carrier 3. And a power receiving device 5 that receives power supply by induction.
The support member 6 of the feeder 2 is formed of an insulator, and the entire mounting seat 8 to which the support member 6 is attached is formed of an insulator such as synthetic resin.
As shown in FIG. 3A, the mounting seat 8 can be formed of an insulator at least at a portion 8a facing the core 7 of the pickup coil 4, and as shown in FIG. 3B. Further, the mounting seat 8 can be supported only on one side.
[0020]
Thus, in the non-contact power supply facility of this reference example , the mounting seat 8 for fixing the support member 6 of the power supply line 2 is formed of an insulator at least at a position facing the core 7 of the pickup coil 4. Heat generation of the mounting seat due to eddy currents can be prevented, power loss can be reduced, and the inductance of the pickup coil 4 can be stabilized to stabilize power feeding characteristics.
[0021]
Furthermore, with reference to FIG. 4, 2nd Example of the non-contact electric power supply equipment of this invention is described.
The non-contact power supply facility of the second embodiment is laid along the traveling rail 1 and supplies power by electromagnetic induction via a power supply line 2 for passing a high-frequency current and a pickup coil 4 provided on the side of the carrier 3. And a power receiving device 5 for receiving the power.
And the mounting seat 8 which consists of a conductor which fixes the supporting member 6 of the feeder 2 is intermittently provided with a pitch larger than the length of the core 7 of the pickup coil 4, and the carrier 3 shown in FIG. At the station stop position, the mounting seat 8 is arranged at a position not facing the core 7.
[0022]
Further, in this embodiment, a conductor detection sensor 10 for detecting a conductor is provided in the transport vehicle 3, and even when the transport vehicle 3 is temporarily stopped, the conductor is placed at a position facing the core 7 by a control device (not shown). The transporting vehicle 3 is stopped so that the mounting seat 8 is not located.
Specifically, for example, as shown in FIG. 4B, the transport vehicle 3 is stopped while the conductor detection sensor 10 disposed in the middle of the core 7 is on the mounting seat 8. Yes.
[0023]
This prevents heat generation of the mounting seat 8 made of the conductor due to the eddy current of the leakage magnetic flux of the feeder line 2 even when the station of the transport vehicle is stopped or temporarily stopped, reduces power loss, and further The inductance of the coil 4 can be stabilized and the power feeding characteristics can be stabilized.
[0024]
Further, in this embodiment, as shown in FIG. 5, the distance d between the mounting seat 8 and the core 7 is set to be not less than the width D of the groove 7a in the opening of the core 7, so that the mounting seat 8 is made of a conductor. Even if it exists, the heat_generation | fever by the eddy current of a leakage magnetic flux is suppressed, and the loss of electric power is decreased.
[0025]
【The invention's effect】
According to the non-contact power supply facility of the first invention, since the mounting seat for fixing the support member of the power supply line is not provided at least at a position facing the core of the pickup coil, the mounting by the eddy current of the leakage magnetic flux is performed. Heat generation of the seat can be prevented, power loss can be reduced, and the inductance of the pickup coil can be stabilized to stabilize the power feeding characteristics.
[0026]
According to the non-contact power supply facility of the second invention , the mounting seat for fixing the support member of the power supply line is intermittently provided at a pitch larger than the length of the core of the pickup coil, and the mounting seat is mounted on the transport vehicle. Since the station stop position is not opposed to the core, the mounting seat is prevented from being heated due to the eddy current of the leakage magnetic flux, especially when the carrier station stops, and the loss of power is reduced. The inductance of the pickup coil can be stabilized to stabilize the power feeding characteristics.
[0027]
In the case of the non-contact power supply facility according to the second aspect of the present invention , a conductor detection sensor for detecting a conductor is provided in the transport vehicle, and the stop control of the transport vehicle is performed by the control device based on the detection result of the conductor detection sensor. In addition, by stopping the transport vehicle so that the mounting seat made of the conductor is not located at the opposed position of the core, even when the transport vehicle is temporarily stopped, the mounting seat is prevented from being heated due to the eddy current of the leakage magnetic flux, It is possible to reduce power loss and stabilize the pickup coil inductance to stabilize the power feeding characteristics.
[0028]
Furthermore, by setting the gap between the mounting seat and the core to be equal to or greater than the groove width of the opening of the core, even if the mounting seat is a conductor, heat generation due to eddy current of leakage magnetic flux is suppressed, and power loss is reduced. can do.
[Brief description of the drawings]
FIG. 1 shows a first embodiment of a non-contact power feeding facility according to the present invention, where (a) is a front view, (b) is a side view, and (c) is a plan view.
2A and 2B show a reference example of a non-contact power supply facility, where FIG. 2A is a front view, FIG. 2B is a side view, and FIG. 2C is a plan view.
FIG. 3 shows an example of a mounting seat of the reference example , (a) is a front view showing a state where a part is an insulator, and (b) is a front view showing a state where only one side is supported. is there.
4A and 4B show a second embodiment of the non-contact power feeding equipment of the present invention, where FIG. 4A is a front view and FIG. 4B is a side view.
FIG. 5 is a front view showing the distance between the mounting seat and the core of the embodiment.
FIG. 6 is a graph showing changes in output characteristics of a pickup coil.
7A is a graph showing a change in coil inductance with respect to the distance between the core and the conductor, and FIG. 7B is an explanatory diagram showing the positional relationship between the core and the conductor.
FIG. 8 is a circuit diagram showing a power receiving circuit on the traveling vehicle side.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Traveling rail 2 Feeding line 3 Carriage vehicle 4 Pickup coil 5 Power receiving apparatus 6 Support member 6a Support | pillar 6b Horizontal support | pillar 7 Core 7a Groove 8 Mounting seat 8a Coil opposing part 9 Structural material 10 Conductor detection sensor

Claims (4)

  In a non-contact power supply facility including a power supply line that is laid along a traveling rail and flows a high-frequency current, and a power receiving device that receives power supply by electromagnetic induction via a pickup coil provided on a transport vehicle side, A non-contact power supply facility characterized in that a mounting seat for fixing the support member is not provided at least at a position facing the core of the pickup coil.   In a non-contact power supply facility including a power supply line that is laid along a traveling rail and flows a high-frequency current, and a power receiving device that receives power supply by electromagnetic induction via a pickup coil provided on a transport vehicle side, A mounting seat made of a conductor for fixing the support member is intermittently provided at a pitch larger than the length of the core of the pickup coil, and the mounting seat is disposed at a position not facing the core at the station stop position of the transport vehicle. A non-contact power supply facility characterized by that. A conductor detection sensor for detecting a conductor is provided in the transport vehicle, and the control device performs stop control of the transport vehicle based on the detection result of the conductor detection sensor so that the mounting seat is not positioned at the opposite position of the core. non-contact power feeding apparatus according to claim 2, characterized in that so as to stop the transport vehicle. The non-contact power feeding equipment according to claim 2 or 3 , wherein a distance between the mounting seat and the core is equal to or greater than a groove width of the opening of the core.

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