JP3528551B2 - Contactless power supply equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a contactless power feeding facility,
In particular, it relates to the protection circuit.

[0002]

2. Description of the Related Art In a conventional non-contact power feeding facility for a moving body, as disclosed in, for example, Japanese Patent Application Laid-Open No. 8-251704, there is a danger of fire, that is, a magnetic flux generated from an induction line through which a high frequency current flows. Eddy current flows through a metal (for example, a wrench) placed close to the induction line, and the metal heats up, which heats the induction line and the risk of burning There is. In this equipment, an optical fiber cable is laid along the guide line, a light emitting part and a light receiving part are connected to both ends of this optical fiber cable, and the light receiving part detects the light attenuation rate, and the light attenuation rate is a predetermined attenuation rate. A detection circuit that outputs an alarm when the above is reached is connected, and the high-frequency current is shut off by the alarm output of this detection circuit.

In addition, for a device that constantly generates heat in a power supply state,
A method of attaching a bimetal that operates when the device abnormally heats up and shutting off the power supply to the device by the operation of the bimetal to protect the device has been widely used conventionally.

[0004]

However, the optical fiber cable used in the contactless power feeding equipment has a problem that the amount of transmission is reduced by restraining or bending, the detection distance is shortened, and the optical fiber does not operate. However, there is a problem that the connection is difficult and the construction is difficult.

Although the guide line is protected, power is supplied to the load by abnormal heat generation due to damage to the pickup coil arranged facing the guide line in the moving body and electromotive force induced in the pickup coil. No protection has been given to the abnormal heat generation of the substrate on which the circuit for

Further, in the protection of the device by only the bimetal, when the temperature of the device is lowered due to the interruption of the power supply, the bimetal is turned off again and the power supply is restarted, and the device is restarted while the cause of the heat generation abnormality is unknown, and the abnormal state is detected. There was a fear of expansion.

The present invention solves the above problems,
An object of the present invention is to provide a contactless power feeding facility that is not affected by bending, is easy to construct, and can reliably protect the pickup coil and the circuit board.

[0008]

In order to solve the above-mentioned problems, the contactless power supply equipment of the first aspect of the present invention lays an induction line for flowing a high frequency current along a moving line of a moving body, and the moving body is provided with:
Provided with a coil that is contactlessly fed from the dielectric line, is a contactless power feeding facility that feeds power to a moving body in a contactless manner, each of a pair of non-magnetic conductors being covered with an insulator that softens at a predetermined temperature, A heat-sensitive wire formed by twisting conductors covered with these insulators is laid along the heat-generating portion of the moving body, and the heat-generating portion of the moving body is heated to the predetermined temperature or higher to insulate the heat-sensitive wire. When the body softens and the conductors are short-circuited, the short-circuited conductor and the coil form a closed circuit.

According to the above structure, when the heat generating portion abnormally generates heat and the temperature exceeds the predetermined temperature, the insulator of the heat sensitive wire is softened to short-circuit between the conductors, and the shorted conductor and coil form a closed circuit. Is formed. Therefore, the power supply to the moving body is cut off, the heat generating portion is prevented from further heat generation, and the burnout is prevented. Further, since the heat-sensitive wire is formed by a non-magnetic conductor wire, it is not affected by electromagnetic induction from the guide line, is not self-heated, and is not affected by bending and is easy to install.

The contactless power feeding equipment of the second invention is the contactless power feeding equipment of the first invention, characterized in that the heat generating portion of the moving body is a coil. According to the above configuration, when the coil abnormally heats up and the temperature becomes equal to or higher than the predetermined temperature, the insulator is softened and the conductor wire is short-circuited.
A closed circuit is formed by the short-circuited lead wire and the coil, and the coil is prevented from further heat generation and burnout.

Further, in the contactless power feeding equipment of the third invention, an induction line for flowing a high frequency current is laid along the moving line of the moving body, and the moving body is provided with a coil which is fed from the dielectric line in a contactless manner. A contactless power supply facility for contactlessly supplying power to a moving body, in which a heat-sensitive element is installed in a heat generating portion of the moving body, and a pair of non-magnetic conductors are covered with an insulator that softens at a predetermined temperature, A heat-sensitive wire formed by twisting conductors covered with these insulators is provided, one end of the pair of conductors of the heat-sensitive wire is connected to both ends of the heat-sensitive element, and the other end of the pair of conductors of the heat-sensitive wire is connected. Each of them is connected to both ends of the coil.

According to the above construction, the coil is short-circuited via the heat-sensitive wire by the operation of the heat-sensitive element installed in the heat-generating portion of the moving body, so that the power supply to the moving body is cut off and burnout is prevented. The short-circuit current flows through the heat-sensitive wire, the insulator of the heat-sensitive wire is softened, the conductors are short-circuited, and thus the coil is short-circuited. Therefore, even if the heat generating portion of the moving body is cooled by cutting off the power supply and the heat sensitive element is turned off, the power is not supplied again.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 4 is a side view of a main part of contactless power feeding equipment according to Embodiment 1 of the present invention, and FIG. 5 is a partial sectional front view of the contactless power feeding equipment.

The transport vehicle body V as a moving body includes a drive trolley 1A, a driven trolley 1B, and these trolleys 1A and 1B.
And a guide rail B for movably guiding the vehicle body V.

The drive trolley 1A is provided with traveling wheels 2 that engage with the upper portions of the guide rails B, steady rest rollers 3 that contact the lower portions of the guide rails B from both sides, and a pickup unit P. By driving the traveling wheel 2 of 1 A by the electric motor 4 with a speed reducer, the vehicle body V
Runs. Further, the driven trolley 1B includes traveling wheels 5 that engage with the upper portions of the guide rails B, and steady rest rollers 6 that contact the lower portions of the guide rails B from both lateral sides.

The guide rail B is provided with a wheel guide portion 7 at its upper portion and a roller guide portion 8 at its lower portion, and is supported in a suspended state from a ceiling or the like by a support frame 9 connected to one lateral side. The guide line unit X is attached to the other side of the guide rail B to which the support frame 9 is attached.

The guide line unit X includes a pair of upper and lower hangers 11 along one side of the guide rail B along the guide rail B.
A vertically extending bracket, and a pair of upper and lower hangers 11 is provided with a bracket 13 having a ring-shaped locking portion that is integral with the hanger 11 and has an open tip and that is flexible and maintains a predetermined shape. Place at intervals and hanger the guide line 14
It is configured by fitting into 11 locking parts. The bracket 13 is attached to the guide rail B by a metal fitting made of the same material as the guide rail B, for example, a screw made of aluminum.

The induction line 14 is a stranded wire (hereinafter referred to as a litz wire) formed by collecting insulated thin wires as an insulator,
For example, it is formed by coating with a resin material such as vinyl chloride, and a high frequency current is supplied from the power supply device M.

The pickup unit P is shown in FIG.
As shown in FIG. 3, a pickup coil 22 is constructed by winding the above litz wire of 10 to 20 turns around a central convex portion of a ferrite 21 having an E-shaped cross section.
The ferrite 21 is adjusted so that the center of the central convex portion thereof is approximately at the center of the pair of guide lines 14 of the guide line unit X and is positioned perpendicular to the guide rail B, and is fixed to the drive trolley 1A. When the induction line 14 is energized (alternating current), an electromotive force is generated in the pickup coil 22.

The drive trolley 1A is provided with a circuit board 31 having the circuit configuration shown in FIG. On the circuit board 31,
In parallel with the pickup coil 22, the pickup coil 22
At the same time, a capacitor 32 that forms a resonance circuit that resonates at the frequency of the induction line 14 is connected, a rectification / smoothing circuit 33 is connected to the capacitor 32, and an output voltage V
A constant voltage control circuit 34 for controlling out to a reference voltage VE is connected, and an inverter 35 and a control power supply device 36 are connected to the constant voltage control circuit 34. The electric motor 4 with a speed reducer is connected to the inverter 35.

The constant voltage control circuit 34 includes a current limiting coil 41 and a voltage generator 42 for generating the reference voltage VE.
A comparator 43 that compares the output voltage Vout with the reference voltage VE; an output adjustment transistor 44 that is an FET that is turned on by the comparator 43 when the output voltage Vout exceeds the reference voltage VE; and a diode 45 that forms a filter. And a capacitor 46. Control power is supplied from the control power supply 36 to the voltage generator 42 and the comparator 43.

With the configuration of the constant voltage control circuit 34, when the load decreases due to the electric motor 4 being stopped or the like, the output voltage Vout increases and the output voltage Vout changes to the reference voltage VE.
When the output voltage exceeds, the comparator 43 turns on the output adjusting transistor 44, lowers the output voltage Vout, and maintains the output voltage Vout at the reference voltage VE.

Further, in FIG. 1, 51 is a first heat sensitive wire, and 52
Is the second heat sensitive wire. As shown in FIG. 2, the heat-sensitive wires 51, 52 are formed by coating a pair of non-magnetic phosphor bronze round wires 53 with a heat-sensitive insulator 54 made of thermoplastic, respectively. A pair of conductors covering 54
53 is twisted together, and a tape 55 and a sheath 56 are covered on the 53. When the ambient temperature reaches a certain temperature, the heat-sensitive wires 51 and 52 soften the insulator 54, and the pair of twisted conductive wires 53 cause a spring action to short-circuit.

As shown in FIGS. 1 and 3, the tip portion of the first heat-sensitive wire 51 is laid on one side of the pickup coil 22 and integrally fixed with epoxy resin together with the litz wire forming the coil 22. Has been done. The first heat-sensitive wire 51 is laid from the pickup coil 22 along the wiring between the pickup coil 22 and the circuit board 31 and the fourth terminal 65 of the terminal block 61 of the circuit board 31. Heat rays
The pair of conductors 53 of 51 are respectively the second terminals 63 of the terminal block 61.
And the third terminal 64. The first heat sensitive wire 51
Of the pair of conducting wires 53 has a predetermined distance (for example, several meters).
m) Separated and fixed to the coil 22. The first of the terminal block 61
Pickup coil 22 and circuit board at terminal 62 and 4th terminal 65
The wiring between 31 is connected, the 1st terminal 62 and the 2nd terminal 63 are connected, and the 3rd terminal 64 and the 4th terminal 65 are connected.

The second heat sensitive wire 52 is an output adjusting transistor 44 composed of an FET, which is an example of a heat generating portion of a moving body.
Installed near the mounting chassis 66, near the control power supply 36, and along the first terminal 62 of the terminal block 61 of the circuit board 31, and the pair of conductors 53 of the second heat-sensitive wire 52 are respectively connected to the terminal block. It is connected to the second terminal 63 and the third terminal 64 of 61. The terminal block 61 also becomes a heat generating portion of the moving body when a contact failure or the like occurs.

The operation of the above circuit configuration will be described. A high-frequency current is supplied from the power supply device M to the induction line 14, and a magnetic flux generated in the induction line 14 causes a large electromotive force to be generated in the pickup coil 22 of the vehicle body V located on the guide rail B. The generated alternating current is rectified by the rectifying / smoothing circuit 33, the output voltage Vout is maintained at the reference voltage VE in the constant voltage control circuit 34, and is supplied to the electric motor 4 with a speed reducer via the control power supply device 36 and the inverter 35. To be done. The vehicle body V of the moving body is guided and moved by the guide rail B when the traveling wheels 2 are driven by the electric motor 4 supplied with power.

If the litz wire of the pickup coil 22 is damaged, the magnetic flux generated by the induction line 14 causes the litz wire to generate heat, which heats the first heat-sensitive wire 51 to reach a temperature of 90 ° C., for example. Then, the insulator 54 is softened, and the pair of twisted conductor wires 53 causes a spring action to short-circuit.
Both ends of 22 are short-circuited, and a pair of conducting wire 53 and pickup coil 22 form a closed circuit. Therefore, the litz wire of the pickup coil 22 does not generate more heat, and is prevented from being burnt and causing a fire.

When contact failure or the like occurs at the fourth terminal 65 of the terminal block 61 and heat is generated, the first heat sensitive wire 51 is also heated and both ends of the pickup coil 22 are short-circuited. Therefore, the fourth terminal 65 of the terminal block 61 does not generate heat any more, and the circuit board 31 is prevented from being burnt and causing a fire.

When the output adjusting transistor 44, which is an FET, consumes a large amount of power due to a low load, or the output cable of the constant voltage control circuit 34 is disconnected and generates heat, the second heat sensitive wire 52 is heated. For example, temperature 90 ℃
When it reaches, the insulator 54 softens and the twisted pair of conducting wires 53 short-circuit due to a spring action, and both ends of the pickup coil 22 are short-circuited, and the pair of conducting wires 53 and the pickup coil 22 form a closed circuit. It is formed. Therefore, the power supply to the circuit board 31 is cut off, the output adjustment transistor 44 is cooled, and the circuit board 31 is prevented from burning to prevent a fire.

When the control power supply device 36 overheats and abnormally generates heat, the second heat sensitive wire 52 is also heated,
Both ends of the pickup coil 22 are short-circuited. Therefore, the power supply to the control power supply device 36 is cut off, the control power supply device 36 does not generate more heat, and the circuit board 31 is prevented from being burnt out and causing a fire.

When the first terminal 62 of the terminal block 61 generates heat due to contact failure or the like, the second heat sensitive wire 52 is also heated, and both ends of the pickup coil 22 are short-circuited. Therefore, the first terminal 62 of the terminal block 61 does not generate heat any more, and it is possible to prevent the circuit board 31 from being burned and causing a fire.

Thus, the power can be efficiently supplied to the vehicle body V without contact, and the pickup coil should be used.
Even if the terminal 22 is damaged, or if the terminal block 61, the output adjusting transistor 44, or the control power supply device 36 generates heat, the heat generation is detected using the heat sensitive wires 51 and 52, and the pickup coil 22
By forming a closed circuit by short-circuiting both ends of, the fire accident in which the pickup coil 22 and the circuit board 31 are heated and burned can be prevented. Further, since the abnormality of the vehicle body V, which is a moving body, is processed in the vehicle body V, other normal vehicle bodies V can continue to operate without affecting the guide line 14 and can be operated as equipment. You can continue.

Further, since the heat sensitive wires 51, 52 can be bent freely and can be easily connected, the construction is easy, the time for laying work can be shortened, and the pick-up coil 22 can be molded together, resulting in work efficiency. Can be improved. Further, the cost of the heat sensitive wires 51, 52 itself is low, and the cost of the equipment can be suppressed.

In the present embodiment, the output adjusting transistor 44, which is an FET, is used as an example of the heat generating portion of the moving body.
Although the control power supply device 36 and the terminal block 61 are mentioned, if there is another heat generating portion in the circuit board 31 that may generate heat, the second heat sensitive wire 52 should be continuously laid in the heat generating portion. Accordingly, it is possible to prevent a fire accident in which the circuit board 31 is similarly heated and burned. (Embodiment 2) FIG. 6 is a laying diagram of a heat-sensitive wire on a circuit board of a contactless power feeding facility according to Embodiment 2. The same components as those in FIG. 3 of the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 6, 71 and 72 are bimetals, which are an example of a heat sensitive element, the bimetal 71 is installed near the mounting chassis 66 of the output adjusting transistor 44 composed of an FET, and the bimetal 72 of the control power supply device 36. It is installed in the vicinity. The bimetal 71 is connected to the second terminal 63 and the third terminal 64 of the terminal block 61 by the third heat-sensitive wire 73 laid along the first terminal 62 of the terminal block 61, and the bimetal 72 is the fourth terminal.
The heat-sensitive wire 74 is connected to the second terminal 63 and the third terminal 64 of the terminal block 61. The third heat sensitive wire 73 and the fourth heat sensitive wire
74 uses the same heat sensitive wire as the first and second heat sensitive wires 51, 52.

According to this structure, the output adjusting transistor 44 including an FET, which is an example of the heat generating portion of the moving body, is used.
Alternatively, the control power supply 36 heats up abnormally and the bimetal 71
Alternatively, when 72 is activated, both ends of the pickup coil 22 are short-circuited, the power supply to the circuit board 31 is cut off, and the third heat sensitive wire 73 or the fourth heat sensitive wire 74 is heated by the short-circuit current. Insulation when reaching ℃
When 54 is softened, the pair of twisted conductor wires 53 causes a spring action to cause a short circuit. Therefore, the state where the power supply to the circuit board 31 ′ is cut off is maintained, the transistor 44 and the control power supply device 36 are cooled, and the circuit board 3 ′ is cooled.
1'is burned and a fire is prevented.

By using the bimetals 71 and 72 as switches and the heat-sensitive wires 73 and 74 as breakers in this way, if the bimetals 71 and 72 alone are used, if the temperature drops due to the interruption of power supply, the bimetals 71 and 72 are used. Is turned off again, power supply is restarted, and the cause of the heat generation abnormality is restarted without being known, and the abnormal condition may expand, but since the heat-sensitive wires 73 and 74 remain in the short-circuited state, the restart can be prevented, It is possible to prevent the risk of abnormal expansion. Furthermore, by providing the heat-sensitive wires 73 and 74 corresponding to the bimetals 71 and 72, respectively, the heat-generating parts of the moving body that generate heat abnormally by finding the heat-sensitive wires 73 and 74 in which the insulator 54 is softened, that is, The output adjusting transistor 44 or the control power supply device 36 can be specified.

In the present embodiment, the output adjusting transistor 44 including an FET is used as an example of the heat generating portion of the moving body.
However, if there is a heat generating part that may generate heat inside or outside the circuit board 31 ', by installing a bimetal also in the heat generating part and connecting it to the terminal block 61 by a heat-sensitive wire. Similarly, the power supply to the circuit board 31 'can be maintained in the cut-off state, and the circuit board 31' can be prevented from burning and causing a fire.

Further, the heat sensitive wires 73, 74 may be laid along the heat generating portion of another moving body. At this time, when not only the operation of the bimetal but also the temperature of the heat generating part of the other moving body becomes higher than a predetermined temperature, the insulator is softened and the conducting wire is short-circuited, so that the coil is short-circuited and the moving body is not supplied with power. It is cut off and burnout due to heat generation is prevented. (Embodiment 3)
FIG. 7 is a laying diagram of the heat-sensitive wires of the circuit board of the contactless power supply equipment according to the third embodiment. The same components as those of the second embodiment shown in FIG. 6 are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 7, reference numeral 81 is a second terminal block installed on the circuit board 31 ", 82 is a third terminal block installed on the circuit board 31", and the bimetals 71 and 72 are connected in parallel to form a second terminal block.
81 is connected to the first terminal 84 and the second terminal 85, and the first terminal 84 and the second terminal 85 are respectively connected to the first terminal 87 and the second terminal 85 of the third terminal block 82 by the fifth heat-sensitive wire 86. It is connected to terminal 88. The fifth heat-sensitive wire 86 is the above-mentioned first and second heat-sensitive wires.
The same heat sensitive wire as 51, 52 is used. Further, the first terminal 87 and the second terminal 88 of the third terminal block 82 are respectively the first terminal block
It is connected to the second terminal 63 and the third terminal 64 of 61.

The first heat-sensitive wire 51 is connected to the first terminal block 61 at the first
It is laid along the terminal 62 and the fourth terminal 65. According to this configuration, the FET, which is an example of the heat generating portion of the moving body, is
When the output adjusting transistor 44 or the control power supply 36, which is composed of, abnormally heats up and the bimetal 71 or 72 is activated, both ends of the pickup coil 22 are short-circuited, the power supply to the circuit board 31 is cut off, and the fifth The heat-sensitive wire 86 is heated by the short-circuit current, and when the temperature reaches 90 ° C., for example, the insulator 54 softens and the twisted pair of conducting wires 53 causes a spring action to cause a short circuit. 22 forms a closed circuit. Therefore, the state where the power supply to the circuit board 31 ″ is cut off is maintained, the transistor 44 and the control power supply device 36 are cooled, and the circuit board 31 ″ is prevented from burning to cause a fire.

By using the bimetals 71 and 72 as the switches and the fifth heat-sensitive wire 86 as the breaker in this way, if the bimetals 71 and 72 alone are used, the temperature of the bimetals 71 and 72 decreases when the power is cut off. 72 is turned off again, power supply is restarted, and it may restart without knowing the cause of the heat generation abnormality, and the abnormal state may expand, but since the heat-sensitive wire 86 continues the short-circuit state, it is possible to prevent restart and It is possible to prevent the risk of expansion. Further, the fifth heat-sensitive wire 86 between the terminal blocks 81 and 82 can be easily replaced, which facilitates restoration.

In the present embodiment, the output adjusting transistor 44 including an FET is used as an example of the heat generating portion of the moving body.
However, if there is a heat generating portion that may generate heat inside or outside the circuit board 31 ″, a bimetal is also installed in the heat generating portion and connected to the terminal block 81. The power supply to the circuit board 31 ″ can be maintained in a disconnected state, and the circuit board 31 ″ is prevented from burning and causing a fire.

Further, the fifth heat sensitive wire 86 may be laid along the heat generating portion of another moving body. At this time, when not only the operation of the bimetal but also the temperature of the heat generating part of the other moving body becomes higher than a predetermined temperature, the insulator is softened and the conducting wire is short-circuited, so that the coil is short-circuited and the moving body is not supplied with power. It is cut off and burnout due to heat generation is prevented.

[0045]

As described above, according to the present invention, a pair of conductors of a heat-sensitive wire are short-circuited when the heat-generating portion of the moving body exceeds a predetermined temperature, and a closed circuit is formed by the short-circuited wire and coil. As a result, the power supply to the moving body is cut off, and the coil of the moving body, the circuit board, and the like can be prevented from being burned.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of main parts of a contactless power feeding facility according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view and a side view of a heat-sensitive wire of the contactless power supply equipment.

FIG. 3 is a layout diagram of a pickup coil of the contactless power supply equipment and a heat-sensitive wire laid on a circuit board.

FIG. 4 is a side view of a main part of the contactless power feeding facility.

FIG. 5 is a partially sectional front view of the contactless power feeding facility.

[Fig. 6] Fig. 6 is a drawing of a heat-sensitive wire laid on the pickup coil and the circuit board of the contactless power supply equipment according to the second embodiment of the present invention.

[Fig. 7] Fig. 7 is a laying diagram of a heat-sensitive wire laid on the pickup coil and the circuit board of the contactless power feeding facility according to the third embodiment of the present invention.

[Explanation of symbols]

V carrier body (moving body) B Guide rail (moving track) X guidance line unit P pickup unit M power supply 4 electric motor 14 Induction line 22 pickup coil 31, 31 ', 31 "circuit board 32 capacitors 33 Rectification / smoothing circuit 34 Constant voltage control circuit 35 inverter 36 Control power supply 44 Output adjustment transistor 51,52,73,74,86 Heat sensitive wire 53 conductor 54 Insulator 55 tapes 56 sheath 61, 81, 82 terminal block 71,72 Bimetal (heat sensitive element)

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-9-23510 (JP, A) JP-A-11-164498 (JP, A) JP-A-10-201006 (JP, A) JP-A-8- 251704 (JP, A) JP-A-58-94785 (JP, A) Fukukaihei 2-14694 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60L 5/00 H01F 38 / 14 H02H 5/04 H02J 17/00

Claims (3)

(57) [Claims] 1. An induction line for flowing a high-frequency current is laid along a moving line of a moving body, a coil is fed to the moving body without contact from the dielectric line, and power is fed to the moving body without contact. A non-contact power supply facility, in which a pair of non-magnetic conductor wires are covered with an insulator that softens at a predetermined temperature, and a heat-sensitive wire formed by twisting the conductor wires covered with these insulators When installed along the heat generating portion, the heat generating portion of the moving body is heated to the predetermined temperature or higher, the insulator of the heat sensitive wire is softened, and when the conductors are short-circuited, the shorted conductor and the coil form a closed circuit. A contactless power supply facility characterized by being formed. 2. The contactless power supply equipment according to claim 1, wherein the heat generating portion of the moving body is a coil. 3. An induction line for flowing a high-frequency current is laid along a moving line of a moving body, a coil is fed to the moving body in a contactless manner from the dielectric line, and power is fed to the moving body in a contactless manner. A non-contact power supply facility, in which a heat-sensitive element is installed in the heating part of the moving body, a pair of non-magnetic conductors are covered with an insulator that softens at a predetermined temperature, and the conductors covered with these insulators are A heat-sensitive wire formed by twisting, wherein one end of a pair of conductors of the heat-sensitive wire is connected to both ends of the heat-sensitive element, and the other end of the pair of conductors of the heat-sensitive wire is connected to both ends of the coil. A non-contact power supply facility characterized by.