JP5389735B2 - Power transmission instruction transmission device - Google Patents

Description

  The present invention relates to a power supply instruction transmission apparatus. That is, the present invention relates to a power supply instruction transmission device used with a non-contact power supply device.

《Technical background》
A non-contact power supply device that supplies electric power from the outside to a battery of an electric vehicle such as an electric vehicle without mechanical contact such as a cable has been developed and put into practical use based on demand.
In this non-contact power feeding device, based on the mutual induction action of electromagnetic induction, an air gap of about several centimeters is formed from a power feeding side coil fixed on a ground power feeding stand or the like to a power receiving side coil mounted on the vehicle side or the like. The power is supplied while being in close proximity.

<Conventional technology>
In such a non-contact power supply device, when power is supplied, it is necessary to transmit power supply information such as a power supply instruction and a required power amount from the power reception side (vehicle side or the like) to the power supply side (ground side). Therefore, the inventor and applicant of this patent application have applied for a patent for the coil communication device of Patent Document 1 below and the coil communication device of Japanese Patent Application No. 2009-142945.
In view of the fact that this coil communication device is used together with a non-contact power feeding device, it is premised that there is no connection cable, etc. It is built into the power supply device.
That is, the primary side coil of the coil communication device is incorporated in the vicinity of the power receiving side coil of the non-contact power feeding device, and the secondary side coil is incorporated in the vicinity of the power feeding side coil of the non-contact power feeding device. An electromagnetic wave carrying a modulation signal of power supply information is emitted between the primary side coil and the secondary side coil, and the power supply information is transmitted.
In addition, the coil communication device has a power supply information communication function as well as a position detection function. A position detection function for detecting whether or not the power receiving side coil of the non-contact power feeding device is directly facing the power feeding side coil, that is, whether or not the power receiving side coil is in a proximity corresponding position in a positional relationship where power can be fed. In other words, if a sensitivity failure or communication failure occurs in the coil communication device incorporated in the non-contact power supply device, it means that the non-contact power supply device is in a positional relationship where power cannot be supplied.

JP 2008-288889 A

By the way, the following subject has been pointed out about this coil communication apparatus and other prior art.
<First problem>
First, as described above, the coil communication device has a one-way (one-way) communication function from the power receiving side (vehicle side or the like) to the power feeding side (ground side). Recently, however, there has been an increasing need for bidirectional communication between the power receiving side and the power feeding side, and a need for further speeding up the communication speed. Corresponding to this has been considered extremely difficult with conventional coil communication devices.
That is, in the coil communication device, a low frequency of about 1.6 MHz carrier frequency is used. However, for two-way communication, a frequency of two waves is required, and it is not easy to cope with it. It is not easy to separate the frequencies sufficiently to prevent each other. Further, in order to increase the communication speed and the baud rate, an improvement in the signal-to-noise ratio (S / N ratio) is required, but there is a problem in that the power consumption increases.
Such problems related to the communication function of the coil communication device can be easily solved by adopting a wireless communication device using a carrier frequency in the 2.4 GHz band used in, for example, Bluetooth.
However, there is a fatal defect that such a wireless communication device does not have a position detection function. The position detection function is extremely important for the operation of the non-contact power feeding device, and is a premise for power feeding.

<< Second problem >>
Secondly, for such a position detection function, a method using an optical sensor was first examined.
However, the optical sensor can be used without problems in an indoor environment such as a factory, but the operation reliability is poor in an outdoor environment where disturbances such as sunlight, wind and rain, and dirt are considered. Since the non-contact power feeding device is mainly used outdoors, a method using an electromagnetic field is superior to the coil communication device described above.
Also, a method using an RFID (Radio Frequency Identification) tag has been studied for the position detection function.
However, there is a problem that radio waves for tag detection on the power receiving side (vehicle side or the like) must always be emitted from the power feeding side (ground side). In order to avoid such constant emission of radio waves, another sensor such as a TV camera is additionally provided on the power supply side, and each time an approach on the power reception side is detected by the sensor, radio waves are emitted from the power supply side. For example, a complicated system is required.

《Third problem》
Third, when power is supplied, if iron or other metallic foreign matter is present between the power supply side (ground side) coil and the power reception side (vehicle side, etc.) coil of the non-contact power supply device, for example, a crushed coffee can When the metal is present, the metal foreign object is induction-heated and heated to a high temperature, which is dangerous.
In such a case, the power supply should be stopped immediately, but the necessity of such a metal foreign object detection function has been pointed out.

<< About the present invention >>
In view of such a situation, the power transmission instruction transmission device of the present invention has been made to solve the above-described problems of the prior art.
The present invention has firstly a position detection function, secondly a metal foreign object detection function, and thirdly, a simple, easy, reliable and stable system, and fourthly in a charged state. It is an object of the present invention to propose a power supply instruction transmission device that can be used to control power supply accordingly.

<About each claim>
The technical means of the present invention for solving such a problem is as follows, as described in the claims.
About Claim 1, it is as follows.
The transmission apparatus of the power supply instruction according to claim 1 is used together with the non-contact power supply apparatus. The non-contact power feeding device can supply power from the power feeding side coil of the power feeding side circuit to the power receiving side coil of the power receiving side circuit in the proximity corresponding position with an air gap based on the mutual induction action of electromagnetic induction. It is.
Based on the mutual induction action of electromagnetic induction, the transmission device has a secondary side circuit disposed near the power feeding side coil from a primary side coil of the primary side circuit disposed near the power receiving side coil. A minute electric power can be transmitted to the secondary coil while being located close to the air gap.
Therefore, the transmission device has a position detection function as to whether or not the power receiving coil is in a positional relationship where power can be supplied. In other words, power is supplied from the power supply side coil of the non-contact power supply device to the power reception side coil on condition that a predetermined minute power is transmitted from the primary side coil to the secondary side coil.

About Claim 2, it is as follows.
According to a second aspect of the present invention, in the transmission device according to the first aspect, the primary coil is embedded in a central space of the power receiving side coil, and the secondary side coil is connected to the power feeding side. It is characterized by being embedded in the central space of the side coil.
About Claim 3, it is as follows.
According to a third aspect of the present invention, there is provided a power transmission instruction transmission device according to claim 1 or 2, wherein the primary side coil and the secondary side coil of the transmission device have a coil surface and a magnetic field generated by the power reception side coil of the non-contact power supply device. Further, it is composed of orthogonal winding coils having a positional relationship orthogonal to the coil surface of the power feeding side coil and the generated magnetic field. Therefore, it is wound around a magnetic core such as a flat ferrite core over the entire surface.
About Claim 4, it is as follows.
According to a fourth aspect of the present invention, there is provided a power supply instruction transmission device according to the first aspect, wherein the transmission device includes a resonance circuit. When a metal foreign object is interposed between the primary side coil and the secondary coil that are positioned in proximity, the metal foreign object detection function is exerted, and the resonance point shifts to output the secondary side coil. It is characterized in that the voltage is lowered and transmission of minute electric power is disabled.

About Claim 5, it is as follows.
According to a fifth aspect of the present invention, there is provided a power supply instruction transmission device according to the fourth aspect, wherein the primary coil is a two-phase winding coil whose axis is shifted by 90 degrees and a two-phase alternating current whose phase is shifted by 90 degrees is energized. . Thus, a rotating magnetic field in which the generated magnetic field rotates is generated.
About Claim 6, it is as follows.
According to a sixth aspect of the present invention, there is provided a power supply instruction transmission device according to the fourth aspect, wherein the primary coil is a three-phase coil whose axis is shifted by 120 degrees and a three-phase alternating current is energized. Thus, a rotating magnetic field in which the generated magnetic field rotates is generated.
About Claim 7, it is as follows.
According to a seventh aspect of the present invention, there is provided a power supply instruction transmission device according to the first aspect, wherein a power supply request switch for energization on is attached to the primary circuit. The secondary circuit is provided with a relay coil, which can be excited based on transmission of minute electric power. And based on the excitation of the relay coil, the relay contact provided in the power supply side circuit of the non-contact power supply device is switched from normally open to closed, so that power supply is performed while the relay contact is closed, It is characterized by.

About Claim 8, it is as follows.
The power supply instruction transmission device according to claim 8 is the power supply apparatus according to claim 1, wherein the non-contact power supply device supplies power by a stop power supply method in which the power receiving side coil is stopped at a position corresponding to the power supply side coil when power is supplied. It is characterized by being possible.
About Claim 9, it is as follows.
According to a ninth aspect of the present invention, there is provided a power supply instruction transmission device according to the eighth aspect, wherein the contactless power supply device has a battery connected to the power receiving side circuit. The transmission device is characterized in that a minute power output voltage of a power source of the primary circuit is proportional to a charging voltage of the battery, and a voltage detector is provided in the secondary circuit. .
About Claim 10, it is as follows.
According to a tenth aspect of the present invention, there is provided a power transmission instruction transmission device according to the ninth aspect, wherein in the transmission device, the minute power secondary side voltage of the secondary side circuit detected by the voltage detector is applied to the power source of the primary side circuit. It is proportional to the minute power output voltage and the charging voltage of the battery by the non-contact power feeding device.
Thus, during power feeding, the state of charge of the battery can be recognized by the small power secondary voltage detected by the voltage detector, and power feeding by the non-contact power feeding device is performed based on the recognized state of charge of the battery. Can be controlled. That is, the power supply power of the power supply side circuit of the non-contact power supply device can be controlled, and it can be determined whether the power supply is continued or stopped.
About Claim 11, it is as follows.
The transmission device for feeding instruction according to claim 11 is the power feeding side circuit of the non-contact power feeding device and the secondary side of the transmission device according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10. The circuit is fixedly disposed on the ground side, and the power receiving side circuit of the non-contact power feeding device and the primary side circuit of the transmission device are mounted on a moving body such as a vehicle.

<About the action>
Since the present invention comprises such means, the following is achieved.
(1) In the power transmission instruction transmission device, the primary side coil and the secondary side coil are arranged near the power reception side coil and the power supply side coil of the non-contact power supply device.
(2) When power is supplied by the non-contact power supply device, first, the power supply request switch of the transmission device is turned on by a driver or the like.
(3) In the transmission device, when the power receiving side coil is in a positional relationship where power can be supplied, minute power is transmitted between the primary side coil and the secondary side coil. Thereby, it has a position detection function as to whether or not the power receiving side coil is in a proximity-corresponding position in a positional relationship where power can be supplied to the power feeding side coil. Further, since this position detection function generates a rotating magnetic field on the primary side of the transmission device, it is not affected by a positional deviation in the rotational direction on the horizontal plane.
(4) Then, by such transmission of minute electric power, for example, a relay coil of the transmission device is excited, a relay contact of the non-contact power supply device is closed, and power supply is performed.
(5) On the other hand, if the power receiving coil of the non-contact power feeding device is not in a positional relationship where power can be fed, the minute power is not transmitted and the relay coil is not excited, so the relay contact is open and power feeding is performed. Absent.
(6) By the way, the transmission device has a simple configuration for transmitting minute electric power, is not affected by disturbance, and is not affected by electromagnetic waves of the non-contact power feeding device by adopting the orthogonal winding coil.
(7) Furthermore, the transmission device has a metal foreign object detection function. That is, when a metal foreign object is interposed between the non-contact power feeding devices and between the transmission devices, the resonance point of the resonance circuit is shifted, the relay coil is not excited, the relay contact is opened, and power feeding is not performed.
(8) The metallic foreign object detection function can be surely performed regardless of the direction of the metallic foreign object by using the primary coil of the transmission device as a rotating magnetic field generating coil.
(9) In the case of the stop power supply method, in the transmission device, the minute power secondary voltage is proportional to the minute power output voltage of the primary power supply. And it is proportional to the charging voltage of the battery of the power receiving side of the non-contact power feeding device.
Accordingly, by detecting the minute power secondary side voltage on the ground side during power feeding, it is possible to recognize the charge state of the power receiving side battery of the non-contact power feeding device such as the vehicle side and to control power feeding based on this. .
(10) The power supply instruction transmission apparatus of the present invention exhibits the following effects.

<< First effect >>
First, the power transmission instruction transmission device has a position detection function that is important for power feeding by the non-contact power feeding device.
In the transmission device of the present invention, whether or not the power receiving side (vehicle side, etc.) coil of the non-contact power feeding device is directly facing the power feeding side (ground side) coil, that is, is in a proximity-corresponding position in a positional relationship where power can be fed. It has a position detection function to detect whether or not. As long as it is in a corresponding position, minute power is transmitted between the transmission devices and power feeding is performed. On the other hand, if it is not in a corresponding position, minute power is not transmitted and power feeding is not performed.
As described above, the transmission device of the present invention is extremely important for the operation of the non-contact power feeding device, and has a position detection function that is a premise for power feeding.

<< Second effect >>
Secondly, the power transmission instruction transmission device has a metal foreign object detection function and is excellent in safety.
That is, in the transmission device of the present invention, when a metal foreign object is interposed between the coil on the power supply side (ground side) of the non-contact power supply device and the coil on the power reception side (vehicle side, etc.), Demonstrate the detection function. When power is being supplied, power supply is immediately stopped. Therefore, induction heating of the intervening metal foreign object is avoided, and the occurrence of a dangerous situation due to high temperature heating of the metal foreign object is prevented, and safety is improved.

《Third effect》
Thirdly, the power transmission instruction transmission device is a simple, easy, reliable and stable system, and is excellent in cost.
That is, the transmission device of the present invention has the above-described position detection function and metal foreign object detection function with a simple configuration that transmits minute power from the power receiving side (vehicle side or the like) that desires power feeding to the power feeding side (ground side). Demonstrate.
And since it is not adversely affected by disturbances such as sunlight, wind and rain, dirt, etc., as in the prior art of the method using the optical sensor described above, it is most suitable for a non-contact power supply device used mainly outdoors, Reliable and stable power supply control is realized.
Further, unlike the prior art using the RFID tag described above, it is not necessary to constantly emit the tag detection radio wave or to attach a sensor such as a TV camera, and a complicated system is not required. Only when it is necessary for power supply, it is used by the driver of the vehicle or the like with his / her own intention.
Furthermore, when orthogonal winding coils are used for the primary side coil and the secondary side coil, reliable and stable power feeding control is realized without being affected by the strong electromagnetic waves of the non-contact power feeding device.
In addition, by generating a rotating magnetic field on the primary side of the transmission device, the position detection function can be reliably detected without being affected by the rotational displacement on the horizontal plane. Regardless of whether it is possible to detect reliably.
As described above, the transmission apparatus of the present invention has a simple and simple configuration, exhibits a position detection function and a metallic foreign object detection function while being excellent in cost, and can construct a reliable and stable power supply control system.

<< 4th effect >>
Fourth, it is possible to control the power supply according to the state of battery charge on the vehicle side or the like using such a power supply instruction transmission device.
That is, in the case of the stop power supply method, it is possible to recognize on the ground side the battery charging state on the moving body side and the power receiving side of the vehicle such as the vehicle of the non-contact power supply device using the transmission device during power supply. Then, power feeding is controlled based on the recognized charging voltage of the battery. That is, power supply control is performed on the ground side based on information fed back from the vehicle side or the like to the ground side.
On the ground side during power supply, the power supply voltage (voltage and frequency) of the power supply can be controlled and controlled to an appropriate value according to the state of charge of the battery, and whether or not the battery has been charged, that is, power supply should be continued. Whether to stop or not can be determined.
As described above, the effects exerted by the present invention are remarkably large, such as all the problems existing in this type of conventional example are solved.

It is a circuit diagram of a transmission apparatus for explanation of the form for carrying out the invention about a transmission apparatus of a power supply instruction concerning the present invention. It uses for description of the form for implementing this invention, and is front explanatory drawing, such as a magnetic field and a magnetic flux, about the coil of a non-contact non-contact electric power feeder and a transmission apparatus. It uses for description of the form for implementing this invention, (1) A figure is explanatory drawings, such as a primary side coil of a transmission apparatus, (2) A figure is explanatory drawings, such as a secondary side coil. In the description of the embodiment for carrying out the invention, a case where a metallic foreign object is present is shown. (1) FIG. 2 is a front explanatory view, (2) FIG. FIG. 4 is a plan explanatory view of another example, and FIG. 4 (4) is a graph showing a resonance point shift and the like. It uses for description of the form for implementing the invention, and is a circuit diagram of a non-contact electric power feeder. It uses for description of the form for implementing this invention, shows the coil of a non-contact electric power feeder, the coil of a transmission apparatus, etc., and is plane explanatory drawing. It uses for description of the form for implementing this invention, and shows a non-contact electric power feeder and a transmission apparatus, (1) A figure is a whole explanatory drawing, (2) A figure is a block diagram.

Hereinafter, embodiments for carrying out the present invention will be described in detail.
<< About the non-contact power feeding device 2 >>
The power transmission instruction transmitting device 1 according to the present invention is used together with the non-contact power feeding device 2. First, the non-contact power feeding device 2 will be described with reference to FIGS. 5, 6, and 7.
The non-contact power supply device 2 is in close contact with the non-contact air gap G from the power supply side coil 4 of the power supply side circuit 3 to the power reception side coil 6 of the power reception side circuit 5 based on the mutual induction action of electromagnetic induction. Power is supplied while being located. The power feeding side circuit 3 is fixed on the ground A side, and the power receiving side circuit 5 is mounted on a moving body such as the vehicle B side.

Such a non-contact power feeding device 2 will be described in further detail. First, as shown in FIG. 7, the power supply side circuit 3 on the track side is fixedly arranged on the ground, road surface, floor surface, and other ground A side in the power supply stand C and other power supply areas. On the other hand, the power receiving side circuit 5 on the pickup side is mounted on an electric vehicle (EV vehicle), a vehicle B such as a train, and other moving bodies. The power receiving side circuit 5 can be used not only for driving but also for non-driving, and is typically connected to the in-vehicle battery 7 as shown in FIG. 7, but as shown in FIG. In some cases, they are directly connected to various loads L.
Then, the power feeding side coil 4 of the power feeding side circuit 3 and the power receiving side coil 6 of the power receiving side circuit 5 are not contacted while supplying an air gap G, which is a slight gap space of about 50 mm to 150 mm, for example. Proximity to each other and corresponding positioning. As shown in the drawing, a stop power feeding method in which the power receiving side coil 6 is stopped on the power feeding side coil 4 is representative, and in the case of the stop power feeding method, the power feeding side coil 4 and the power receiving side coil 6 are It consists of a symmetric structure that can be paired with each other. Note that a mobile power feeding method in which the power receiving side coil 6 travels on the power feeding side coil 4 at a low speed is possible regardless of the illustrated example.
The power supply side coil 4 of the power supply side circuit 3 is connected to a power supply 8 in which a high frequency inverter is used. The power receiving side coil 6 of the power receiving side circuit 5 is connected to the battery 7 in the example of FIG. 7, and the traveling motor 9 is driven by the battery 7 charged by power feeding. In FIG. 7, 10 is a converter that converts alternating current into direct current, and 11 is an inverter that converts direct current into alternating current.

The mutual induction action of electromagnetic induction is as follows (see also FIG. 2). When power is supplied, between the power supply side coil 4 and the power reception side coil 6 corresponding to each other, an induction electromotive force is generated in the power reception side coil 6 due to the formation of the magnetic flux F in the power supply side coil 4. Supplying electric power to the side coil 6 is publicly known.
That is, when a high frequency alternating current of about 20 kHz to 100 kHz, for example, is applied to the power supply side coil 3 of the power supply side circuit 3 as an excitation current, a magnetic field is generated around the coil conductor of the power supply side coil 4 and the magnetic flux F is generated. It is formed in a direction perpendicular to the coil surface. Then, the magnetic flux F passes through the power receiving side coil 6 of the power receiving side circuit 5 and is linked to generate an induced electromotive force, thereby forming a magnetic field, and power is transmitted and received using the magnetic field. In the non-contact power feeding device 2, power supply of about several tens kW to several hundred kW is performed based on such mutual induction action of electromagnetic induction.

In the power supply side circuit 3 shown in FIG. 5, reference numerals 12 and 13 denote a series resonance coil and capacitor, and reference numeral 14 denotes a parallel resonance capacitor with the power supply side coil 4. Reference numeral 15 denotes a capacitor for parallel resonance with the power receiving side coil 6 of the power receiving side circuit 5.
Further, as shown in FIG. 6, the power supply side coil 4 is substantially flat and has a flat structure of a multiple turn type. In other words, the insulated coil conductors are turned into a circular or square spiral shape while maintaining a parallel positional relationship in parallel on the same plane, so that they are entirely flat and thick with no irregularities. A thin flat structure is formed, and an annular shape and a substantially flange shape are formed. A central space 16 is formed in the central portion.
As the magnetic core 17 of the power supply side coil 4, a ferromagnetic material such as a ferrite core is used. The magnetic core 17 has a flat plate shape, an annular shape, and a substantially flange shape, and is arranged concentrically with the power supply side coil 4. In FIG. 6, 18 is a mold resin, 19 is a foam material, and 20 is a base plate.
In addition, about the power receiving side coil 6 grade | etc., Considering that the example of illustration is a stop electric power feeding system, it is based on the electric power feeding side coil 4 grade | etc., Mentioned above.
In such a non-contact power supply device 2, communication between the vehicle B side on the power receiving side and the ground A side on the power supply side, for example, power supply information such as a power supply instruction and a required power amount is, for example, wireless such as Bluetooth. This is done using a communication device.
The non-contact power feeding device 2 is as described above.

<< Outline of the Invention >>
Hereinafter, a power transmission instruction transmission apparatus 1 according to the present invention will be described with reference to FIGS. First, the outline of the present invention will be described.
The transmission device 1 is used together with the above-described contactless power supply device 2. Then, based on the mutual induction action of electromagnetic induction, the power supply side coil 4 of the noncontact power supply device 2 from the primary side coil 22 of the primary side circuit 21 disposed in the vicinity of the power reception side coil 6 of the noncontact power supply device 2. A minute electric power can be transmitted to the secondary coil 24 of the secondary circuit 23 arranged in the vicinity while the air gap G exists and is positioned in close proximity without contact.
Therefore, the transmission device 1 exhibits a position detection function as to whether or not the power receiving side coil 6 of the non-contact power feeding device 2 is in a positional relationship where power can be fed to the power feeding side coil 4. Power supply from the power supply side coil 4 to the power reception side coil 6 is performed on condition that the minute power is transmitted to the side coil 24.
The power feeding side circuit 3 of the non-contact power feeding device 2 and the secondary side circuit 23 of the transmission device 1 are placed on the ground A side, and the power receiving side circuit 5 of the non-contact power feeding device 2 and the primary side circuit of the transmission device 1 are arranged. 21 is mounted on a moving body such as a vehicle B.
Hereinafter, the transmission apparatus 1 of the present invention will be described in more detail.

<< About the primary side circuit 21 and the secondary side circuit 23 >>
First, the primary side circuit 21 and the secondary side circuit 23 of the transmission apparatus 1 will be described with reference to FIGS.
The primary side circuit 21 is composed of a two-phase alternating current system in the illustrated example, and includes a power source 25, a power supply request switch 26, a series resonance coil 27 and a capacitor 28, and a primary side coil 22 in parallel for each phase. A resonance capacitor 29 and a primary coil 22 are provided.
As the power source 25, an inverter connected to a DC power source, a two-phase inverter having a phase difference of 90 degrees in the illustrated example, is used. An exciting current as a feeding AC, for example, a minute power of about 30 W of transmission power is about 25 kHz. Apply at the operating frequency of. The transmitted power is set so that the final received power (the received power of the relay coil 32 of the secondary circuit 23 described later) is less than 50 W.
The power supply request switch 26 is attached in the vicinity of the power supply 25. For example, the driver of the vehicle B performs energization on / off operation, and is turned on during power supply. A resonance circuit composed of the coil 27 and the capacitor 28 and a resonance circuit composed of the primary side coil 22 and the capacitor 29 resonate at a resonance point frequency corresponding to the operating frequency of the power supply 25.

The secondary side circuit 23 is composed of a two-phase alternating current system corresponding to the primary side circuit 21 in the illustrated example, and each phase of the secondary side coil 24 and the capacitor 30 for parallel resonance of the secondary side coil 24, A rectifying / smoothing circuit 31 and a relay coil 32 are provided.
A resonance circuit composed of the secondary coil 24 and the capacitor 30 resonates at a resonance point frequency corresponding to a predetermined operating frequency of the power source 25. The rectifying / smoothing circuit 31 of the rectifier smoothes the minute electric power from the secondary coil 24. The relay coil 32 can be excited based on transmission of minute electric power. That is, when the smoothed output voltage from the secondary coil 24 and the rectifying / smoothing circuit 31 exceeds a predetermined threshold value, the relay coil 32 is excited. For example, when the transmission power of the power source 25 is about 30 W, the relay coil 32 is Excited with received power of 25W.
When the relay coil 32 is energized, as shown in FIG. 5, the relay contact 33 arranged corresponding to the power supply side circuit 3 of the non-contact power supply device 2 is always opened (disconnected, off). , Switch to closed (continuous, on).
The primary side circuit 21 and the secondary side circuit 23 are as described above.

<About the position detection function>
Now, the transmission device 1 exhibits the position detection function of the non-contact power feeding device 2. The position detection function will be described with reference to FIG. 1, FIG. 2, FIG. 5 to FIG.
First, the primary side coil 22 of the transmission device 1 is disposed in the vicinity of the power receiving side coil 6 such as the vehicle B side of the non-contact power feeding device 2. Typically, as shown in FIGS. 6 and 7, the power receiving side coil 6 is embedded in the central space 16.
On the other hand, the secondary coil 24 of the transmission device 1 is disposed in the vicinity of the power supply side coil 4 on the ground A side of the non-contact power supply device 2. Typically, as shown in FIGS. 6 and 7, it is embedded in the central space 16 of the power feeding side coil 4.

Therefore, when the minute electric power can be transmitted, the primary coil 22 such as the vehicle B side of the transmission device 21 is positioned in proximity to the secondary coil 24 on the ground A side via the air gap G. Inevitably, the power receiving side coil 6 such as the vehicle B side of the non-contact power feeding device 2 is positioned adjacent to the ground side A side power feeding side coil 4 via the air gap G, and is in a positional relationship where power can be fed. .
That is, a minute electric power can be transmitted from the primary side coil 22 to the secondary side coil 24 of the transmission device 1 based on the mutual induction effect of electromagnetic induction by the formation of the magnetic flux f (for the mutual induction effect of electromagnetic induction, (See the above-mentioned for the non-contact power feeding device 2).
On the other hand, the power receiving side coil 6 and the power feeding side coil 4 of the non-contact power feeding device 2 are positioned apart from each other in the vertical direction beyond a predetermined air gap G (vertical distance dimension), or X, When the position is shifted in the Y direction (length / width distance difference) or the parallelism of the coil surface is poor (Z-axis inclination), a minute electric power is generated between the primary side coil 22 and the secondary side coil 24 of the transmission device 1. Transmission is reduced. The minute electric power that reaches the secondary coil 24 from the primary coil 22 becomes weak, and the relay coil 32 is not excited.
In addition, regarding the rotational position deviation in the X, Y plane (horizontal plane), transmission of minute electric power is performed without being affected by the generation of the rotating magnetic field in the primary side coil 22 of the primary side circuit 21 of the transmission device 1. Is called.

Thus, the power transmission instruction transmission device 1 exhibits the position detection function of the non-contact power feeding device 2. Power supply by the non-contact power supply device 2 is performed on condition that minute power is transmitted in the transmission device 1.
That is, in the transmission device 1, in the illustrated example, the secondary power is transmitted between the primary side coil 22 of the primary side circuit 21 and the secondary side coil 24 of the secondary side circuit 23 on the condition that a predetermined minute power is transmitted. The relay coil 32 of the side circuit 23 is excited.
In the illustrated example, when the relay coil 32 is excited, the relay contact 33 of the power supply side circuit 3 of the corresponding non-contact power supply device 2 is switched to close. When the relay contact 33 is switched to the closed state, power is supplied from the power supply side circuit 3 to the power reception side circuit 5.
Thus, the transmission device 1 has a position detection function.

<About orthogonal winding coil>
Next, the orthogonal winding coil will be described with reference to FIG. Both the primary side coil 22 and the secondary side coil 24 are formed by orthogonal winding coils.
That is, the primary side coil 22 and the secondary side coil 24 of the transmission device 1 have a coil surface and a generated magnetic field, and the coil surfaces of the power receiving side coil 6 and the power feeding side coil 4 of the adjacent non-contact power feeding device 2 are generated. It is composed of orthogonally wound coils having a positional relationship in which the directions of operation are orthogonal to each other, and wound around a magnetic core 34 such as a flat ferrite core over the entire surface.

The orthogonal winding coil will be further described in detail. The primary side coil 22 and the secondary side coil 24 wound around the magnetic core 34 are such that the coil surface to be formed and the direction h of the generated magnetic field have the power receiving side coil 6 and the power feeding side coil 4 of the non-contact power feeding device 2. Are perpendicular to the coil surface formed and the direction H of the generated main magnetic field.
That is, the primary coil 22 has a positional relationship and a shape relationship in which the secondary coil 24 is orthogonally wound with respect to the power receiving coil 6 and the power supply coil 4 is wound. In this way, since the action directions of the two, that is, the magnetic fields h and H, are orthogonal, the degree of coupling is minimized, and there is almost no mutual influence and mutual interference.

The power supplied by the non-contact power supply device 2 flows from the power supply side coil 4 on the ground A side to the power reception side coil 6 on the vehicle B side or the like. On the contrary, the minute electric power from the transmission device 1 flows from the primary coil 22 on the vehicle B side to the secondary coil 24 on the ground A side. Both electric powers flow in opposite directions but flow in parallel at the same time.
However, by adopting the orthogonal winding coil on the transmission device 1 side, it is stable without generating an induced voltage due to the power supply magnetic field of the non-contact power supply device 2, that is, without responding to electromagnetic waves of a strong power supply magnetic field. Transmission of minute power is possible.
The primary side coil 22 and the secondary side coil 24 are composed of such orthogonal winding coils.

<< Metallic foreign matter detection function: Part 1 >>
Next, the metal foreign object detection function of the transmission apparatus 1 will be described with reference to FIGS.
That is, the transmission device 1 includes a resonance circuit, and if a metal foreign object D is interposed between the primary side coil 22 and the secondary side coil 24 that are positioned in close proximity, the metal foreign object detection function is exhibited. . That is, the resonance point is shifted and the output voltage of the secondary coil 24 is lowered, so that the minute power transmission is reduced.
Therefore, regardless of the result of the position detection function described above, there may be a case where minute power is not transmitted and power is not supplied by the metal foreign object detection function. There may be a case where the power supply is stopped based on the metal foreign object detection function after the power supply is started based on the position detection function.

The metal foreign object detection function will be further described in detail. First, as a premise, the transmission apparatus 1 shown in FIG. 1 includes three sets of resonance circuits. The primary side circuit 21 includes a series resonance circuit including a coil 27 and a capacitor 27, and a parallel resonance circuit including a primary side coil 22 and a capacitor 29. The secondary side circuit 23 includes a secondary side coil 24 and A parallel resonant circuit including a capacitor 30 is provided.
The presupposed resonance circuit is not limited to the illustrated example, and various other types are possible. For example, among the three resonant circuits described above, only one type of resonant circuit exists, any two types of resonant circuits exist, and the secondary circuit 23 in addition to the illustrated example. A type including a total of four resonance circuits each including a series resonance circuit is conceivable. In short, as a premise, it is sufficient that at least one set of resonance circuits exist in the primary side circuit 21 and the secondary side circuit 23.
The operating frequency of the power source 25 is matched to the resonance point frequency of such a resonance circuit.

Therefore, if there is high permeability or high conductivity between the power feeding side coil 4 and the power receiving side coil 6 of the non-contact power feeding device 1 and between the primary side coil 22 and the secondary side coil 24 of the transmission device 1 incorporated therein. If the metallic foreign matter D with a certain rate is present, the inductance of the primary side coil 22 and the secondary side coil 24 changes, the resonance point frequency is shifted, and the output power of the secondary side coil 24 is reduced.
These points will be described with reference to the graph of FIG. In the figure, the horizontal axis represents the frequency of the power supply 25 and the vertical axis represents the output voltage of the secondary coil 24. The operating frequency of the power supply 25 is adjusted to the resonance point frequency of the resonance circuit.
Now, when the metal foreign matter D exists, the inductances of the primary side coil 22 and the secondary side coil 24 change, and the resonance point frequency shifts to the left or right.
On the other hand, since the power source 25 uses the original resonance point frequency as the operation frequency, the resonance condition is lost, and the output voltage of the secondary side coil 24 falls below the threshold value. In the illustrated example, the relay coil of the secondary side circuit 23 is reduced. 32 is not excited. Therefore, in the illustrated example, in the non-contact power feeding device 2, the relay contact 33 of the power feeding side circuit 3 is opened (disconnected, off), and power feeding is not performed between the power receiving side circuit 5. If power is being supplied, the power supply is stopped.
The metal foreign object detection function is as described above.

<< Metallic foreign matter detection function: Part 2 >>
Furthermore, the transmission device 1 fulfills the metallic foreign object detection function by the rotating magnetic field. The rotating magnetic field will be described with reference to FIGS. 3 and 4 (2) and (3).
The primary coil 22 of the transmission device 1 is composed of a two-phase coil and a two-phase alternating current is energized to generate a rotating magnetic field in which the generated magnetic field rotates in the same plane, regardless of the direction of the metallic foreign matter D. Therefore, the metal foreign object detection function is completed.
Regardless of this, the primary coil 22 may be a three-phase coil and a three-phase alternating current may be energized, so that the generated magnetic field generates a rotating magnetic field.

Such a rotating magnetic field will be further described in detail. The primary coil 22 of the transmission device 1 is composed of orthogonal winding coils as described above, and is also a rotating magnetic field generating coil.
That is, the primary coil 22 is a two-phase winding coil whose axis is shifted by 90 degrees, and a two-phase alternating current whose phase is shifted by 90 degrees is energized to generate a rotating magnetic field. The secondary coil 24 is a single-phase coil or a two-phase coil.
That is, in the primary side coil 22, two sets of a coil and b coil having the same number of windings are wound by 90 degrees on the same plane and wound around the magnetic core 34 as a two-phase winding coil. And the two-phase alternating current which shifted the phase 90 degree | times about single phase alternating current with respect to this a coil and b coil is each supplied.
Thus, in the primary coil 22, a magnetic field is generated in each of the two coils, the a coil and the b coil, according to the law of the ampere circuit, and the magnetic fields of the two coils become rotating magnetic fields that rotate sequentially. To form a combined magnetic field.

Incidentally, the generation of the rotating magnetic field can be configured as follows regardless of the illustrated example. Unlike the illustrated example, the primary coil 22 is composed of a three-phase winding coil whose axis is shifted by 120 degrees, and a three-phase alternating current is energized to generate a rotating magnetic field. The secondary coil 24 is composed of a single-phase coil, a two-phase coil, or a three-phase coil.
That is, in the primary side coil 22, three sets of coils having the same number of turns are respectively wound as a three-phase coil around the magnetic core 34 by shifting each other by 120 degrees on the same plane. Each phase of the three-phase alternating current 120 degrees out of phase is energized with respect to the coil.
Thereby, in this primary side coil 22, a magnetic field arises in each of three sets of coils, but the magnetic field of these three sets of coils turns into a rotating magnetic field which rotates sequentially, and forms a synthetic magnetic field.

In this transmission device 1, an electromagnetic wave of a rotating magnetic field is emitted from the primary side coil 22 toward the air gap G and is incident on the secondary side coil 24 based on the mutual induction action of electromagnetic induction. Is transmitted.
Therefore, in this transmission device 1, the metal foreign matter D exists between the primary side coil 22 and the secondary side coil 24, and the orientation of the metal foreign matter D is, for example, FIG. 4 (1), (2), (3) As shown in the figure, the metallic foreign object detection function can be exhibited even if it is interposed in various different patterns.
The transmission device 1 performs the metal foreign object detection function in this way by generating the rotating magnetic field, and at the same time, the transmission device 1 performs the position detecting function without being affected by the rotational position shift on the horizontal plane. (See above and below).
The metal foreign object detection function is as described above.

<Feedback status feedback>
Next, feedback of the state of charge of the battery 7 will be described with reference to FIGS.
As shown in FIG. 7, in the non-contact power feeding device 2, a battery 7 is connected to the power receiving side circuit 5. As shown in FIG. 1, in the transmission apparatus 1, the power source 25 of the primary circuit 21 is connected to the battery 7, and the minute power output voltage Va of the power source 25 is changed to the charging voltage Vb of the battery 7. Proportional. The secondary circuit 23 of the transmission device 1 is provided with a voltage detector 35.
As shown in FIG. 7, the non-contact power feeding device 2 uses a stop power feeding method in which the power receiving side coil 6 on the vehicle B side is stopped on the power feeding side coil 4 on the ground A side during power feeding. Available.
Therefore, in the transmission device 1, the minute power secondary voltage Vc of the secondary circuit 23 detected by the voltage detector 35 is proportional to the minute power output voltage Va of the power supply 25 of the primary circuit 21. Then, it is proportional to the charging voltage Vb of the battery 7 by the non-contact power feeding device 2.
Accordingly, during power feeding, the charging voltage Vb of the battery 7, that is, the charging state can be recognized by the minute power secondary voltage Vc detected by the voltage detector 35.

These will be described in more detail with the following (a), (b), (c), (d). (A) First, since it is not a mobile power feeding method but a stop power feeding method, the transmission device 1 has an air gap G between the primary side coil 22 and the secondary side coil 24 or a positional deviation in the X and Y directions (so-called front / rear left / right). The vertical and horizontal shifts) are constant and do not change, and the coupling coefficient between them is constant. Therefore, in this transmission device 1, the voltage (secondary power secondary side voltage) Vc of the secondary side circuit 23 of the minute power used is the output voltage (minute power output voltage) of the inverter power supply 25 of the primary side circuit 21. It is proportional to Va.
(B) At the same time, the inverter power supply 25 of the transmission device 1 is connected to the battery 7 of the power receiving side circuit 5 charged by the non-contact power feeding device 2. Therefore, the AC output voltage Va of the inverter power supply 25 of the primary side circuit 21 is proportional to the DC charging voltage Vb of the battery 7.
(C) Now, the minute power secondary voltage Vc of the secondary side circuit 23 of the transmission device 1 is fed and charged by the non-contact power feeding device 2 via the output voltage Va of the inverter power supply 25 of the primary side circuit 21. It is proportional to the charging voltage Va of the battery 7 to be performed.
(D) Based on these, the charging voltage Vb of the battery 7 by the non-contact power feeding device 2 is obtained by the voltage detector 35 provided in the secondary circuit 23 of the transmission device 1 on the ground A side and the power feeding side during power feeding. This can be known by feedback from the vehicle B side and the power receiving side. The charged state of the battery 7 can be recognized by the minute power secondary voltage Vc detected by the voltage detector 35.
The feedback on the state of charge is as described above.

《Action etc.》
The power transmission instruction transmission device 1 of the present invention is configured as described above. Therefore, it becomes as follows.
(1) The power supply instruction transmission device 1 is used together with the non-contact power supply device 2. Typically, the primary side coil 22 is embedded in the central space 16 of the power receiving side coil 6 of the non-contact power feeding device 2 on the vehicle B side, and the secondary side coil 24 is arranged on the power feeding side on the ground A side. It is embedded in the central space 16 of the coil 4 (see FIGS. 2, 6, and 7).

  (2) When supplying power, if the driver on the side of the vehicle B wishing to supply power determines that the in-vehicle power receiving side coil 6 has stopped at a position corresponding to the power supplying side coil 4 (objectively and accurately) The power supply request switch 26 of the primary side circuit 21 of the transmission apparatus 1 is turned on (aside from whether or not it is positioned) (see FIG. 1).

  (3) The transmission device 1 has a position detection function of the non-contact power feeding device 2. Therefore, as predicted by the driver or the like, the power receiving side coil 6 on the vehicle B side of the non-contact power feeding device 2 is positioned close to the power feeding side coil 4 on the ground A side in a positional relationship where power can be accurately fed. In this case (see FIG. 2 and FIG. 7), it becomes as follows.

(4) Transmission and reception of predetermined minute electric power starts from the primary coil 22 on the vehicle B side of the transmission device 1 to the secondary coil 24 on the ground A side, and continues to be transmitted and received after the fact (FIG. 1). , See FIG. When the minute electric power is transmitted, in the illustrated example, the relay coil 32 of the secondary side circuit 23 of the transmission device 1 is excited (see FIG. 1).
In the meantime, in the illustrated example, the relay contact 33 of the power feeding side circuit 3 of the non-contact power feeding device 2 is closed, and power feeding from the power feeding side circuit 3 and the power feeding side coil 4 to the power receiving side circuit 5 and the power receiving side coil 6 is performed. (See FIG. 5).

(5) On the other hand, when the power receiving side coil 6 of the non-contact power feeding device 2 is not in a positional relationship where power can be fed to the power feeding side coil 4 and is not accurately positioned in close proximity, the following occurs. .
In this case, even if the power supply request switch 26 is turned on, the minute power is not sufficiently transmitted between the primary side coil 22 and the secondary side coil 24 of the transmission device 1. Therefore, in the illustrated example, the relay coil 32 of the transmission device 1 is not excited, the relay contact 33 of the non-contact power feeding device 2 remains open, and power feeding is not performed. The driver moves the vehicle B.

(6) By the way, the transmission device 1 transmits minute electric power of less than 50 W from the primary side circuit 21 to the secondary side circuit 23 based on the mutual induction action of electromagnetic induction. That is, the position detection function described above is exhibited with a simple configuration.
Further, since the mutual induction action of electromagnetic induction is used, it is not affected by disturbances such as sunlight, wind and rain, and dirt.
Furthermore, when orthogonal winding coils are employed as the primary side coil 22 and the secondary side coil 24, the action direction, coil surface, and magnetic field are orthogonal to the power receiving side coil 6 and the power feeding side coil 4 of the adjacent non-contact power feeding device 2. (See FIG. 2). Therefore, it does not receive the influence of the strong electromagnetic waves of the non-contact electric power feeder 2, and noise does not arise.
In addition, such a position detection function of the transmission device 1 is not affected by the rotational position deviation between the power supply side coil 4 and the power reception side coil 6 by using the primary side coil 22 as a rotating magnetic field generating coil. Will be completed.
That is, even if the rotational position of the power feeding side coil 4 and the power receiving side coil 6 of the non-contact power feeding device 2 is shifted in the horizontal plane, the primary side coil 22 of the transmission device 1 disposed in the central space 16. Since the primary side coil 22 generates a rotating magnetic field between the secondary side coil 24 and the secondary side coil 24, the position detection function is completed without being affected by such rotational positional deviation.

(7) Furthermore, the transmission device 1 exhibits a metal foreign object detection function. That is, when feeding, between the power feeding side coil 4 and the power receiving side coil 6 of the non-contact power feeding device 2 and between the primary side coil 22 and the secondary side coil 24 of the transmission device 1 incorporated therein, a crushed coffee can, If there is a metal permeability D having high permeability and high conductivity such as other iron, the resonance point frequency of the resonance circuit of the transmission device 1 is shifted and the output voltage of the secondary coil 24 is lowered. (See FIGS. 1 and 4).
Accordingly, the relay coil 32 of the secondary side circuit 23 of the transmission device 1 is not excited, the relay contact 33 of the non-contact power feeding device 2 is open, and power feeding from the power feeding side circuit 3 to the power receiving side circuit 5 is not performed. (See FIG. 5). When power is being supplied, power supply is stopped.

(8) Moreover, the metallic foreign object detection function of such a transmission apparatus 1 functions more reliably by using the primary side coil 22 as a rotating magnetic field generating coil (see FIG. 3).
That is, regarding the intervening metal foreign matter D, various various directions are conceivable (see, for example, FIG. 4 (1), (2), and (3)). On the other hand, when a rotating magnetic field is formed by the primary side coil 22, it is possible to reliably follow whether the direction of the metal foreign object D is vertical, horizontal, or oblique, and a sensitivity decrease due to the direction of the metal foreign object D is avoided.
That is, when the metal foreign matter D is interposed, the inductances of the primary side coil 22 and the secondary side coil 24 are surely changed, and the metal foreign matter detection function of the transmission device 1 is fulfilled. The foreign matter is not limited to the metallic foreign matter D, and carbon or the like having a high conductivity can be detected.

(9) In the illustrated example, as described above, the relay coil 32 and the relay contact 33 are used. However, the present invention is not limited to such illustrated example.
For example, the secondary circuit 23 of the transmission device 1 is provided with a voltage detection sensor or the like instead of the relay coil 32 so that minute power transmission can be detected, and the power supply of the non-contact power supply device 2 is based on the detection. The on / off contact provided in the side circuit 3 may be switched from off (open) to on (closed) so that power feeding is performed.

(10) By the way, in the case of the stop power feeding method (see FIG. 7), in the transmission apparatus 1, the minute power secondary side voltage Vc of the secondary side circuit 23 on the ground A side is changed to the primary side circuit 21 on the vehicle B side. Is proportional to the minute power output voltage Va of the power source 25 (see FIG. 1). The minute electric power secondary side voltage Vc is proportional to the charging voltage Vb of the battery 7 of the power receiving side circuit 5 on the vehicle B side charged by the non-contact power feeding device 2 through the minute electric power output voltage Va.
Therefore, on the ground A side during power feeding, the charging voltage Vb of the battery 7 on the vehicle B side can be recognized by the voltage detector 35 provided in the secondary side circuit 23 of the transmission device 1. . During power feeding, the state of charge on the vehicle B side, which is normally difficult to recognize on the ground A side, is transmitted from the vehicle B side to the ground A side as detailed information.
Therefore, on the ground A side, during the power feeding, the power feeding by the non-contact power feeding device 2 can be controlled based on the charging information and the charging state of the battery 7 transmitted and recognized in this way. The power supply power of the power supply 8 of the power supply side circuit 3 can be controlled and controlled according to the state of charge of the battery 7, and it can be determined whether the power supply is continued or stopped (see FIGS. 5 and 7).
Note that such power supply control is performed by manually controlling the power supply 8 by looking at the display of the detection result of the voltage detector 35 or by inputting the detection result to a microcomputer and performing program control of the power supply 8. Further, the detection result is input to the control means, and the power supply 8 is controlled in sequence.
The operation of the present invention is as described above.

《Merit of power supply control》
Here, the merit of such power supply control will be described in further detail.
First, as a premise, in the non-contact power feeding device 2, a dedicated charge management circuit (charger) corresponding to the type of the battery 7 to be charged is provided for the power receiving side circuit 5 mounted on the vehicle B side such as an electric vehicle. It is often not adopted due to cost reasons (see FIG. 7). In particular, the number of vehicles B to be charged is expected to increase numerically in the future. However, adding a charge management circuit to each of the increasing vehicles B and the like is excessively costly.
As described above, in the power receiving side circuit 5, the power receiving side coil 6 and the battery 7 are often directly connected without going through the charge management circuit. Accordingly, the voltage of the power receiving side coil 6 may rise and change depending on the state of charge of the battery 7, and the voltage of the power feeding side coil 4 of the power feeding side circuit 3 may also rise and change (a charge management circuit is provided). Such voltage change is prevented).
Particularly recently, due to an increase in the required amount of charging power of the battery 7, the voltage of the power supply side coil 4 is approaching 600V, and it is pointed out that the above change may exceed 600V during charging. If it exceeds 600V, a high voltage compatible specification is required for the power supply side circuit 3, and the equipment cost burden becomes excessive. Further, the occurrence of high voltage and overvoltage may cause a failure of the power receiving side circuit 5 and the power feeding side circuit 3.

In view of such a situation, as described above, it is significant that the power supply power of the power supply side circuit 3 of the non-contact power supply device 2 can be appropriately controlled according to the state of charge of the battery 7.
That is, as described above, the voltage of the power source 8 and the power supply side coil 4 of the power supply side circuit 3 can be appropriately controlled according to the charging voltage state of the battery 7. The battery 7 has a low voltage in a high discharge state at the beginning of charging, and the voltage increases as the charging progresses. However, it is possible to control the power supply power of the power supply 8 to gradually increase in accordance with this. Become.
Thus, the voltage change of the battery 7 on the vehicle B side and the power receiving side circuit 5 side is linearly fed back to the power source 8 on the ground A side and the power feeding side circuit 3 side, and the power feeding power (voltage and frequency) of the power source 8 is ) Can be controlled corresponding to the optimum value. Therefore, for example, it is possible not to exceed the high voltage of 600 V in any part of the power feeding side circuit 3 and the power receiving side circuit 5 including the power feeding side coil 4 and the power receiving side coil 6.

  In the present invention, since the transmission apparatus 1 attached to the non-contact power supply apparatus 2 is used, the above-described power supply control can be easily realized with an extremely simple configuration. Therefore, for example, there is an advantage that the possibility of occurrence of high voltage and overvoltage is eliminated at a much lower cost than the case where the above-described charge management circuit is provided on the secondary side. Of course, the determination of power supply continuation or stop is also facilitated.

DESCRIPTION OF SYMBOLS 1 Transmission apparatus 2 Non-contact electric power feeder 3 Power feeding side circuit 4 Power feeding side coil 5 Power receiving side circuit 6 Power receiving side coil 7 Battery 8 Power supply 9 Motor 10 Converter 11 Inverter 12 Coil 13 Capacitor 14 Capacitor 15 Capacitor 16 Central space 17 Magnetic core 18 Mold Resin 19 Foam material 20 Base plate 21 Primary side circuit 22 Primary side coil 23 Secondary side circuit 24 Secondary side coil 25 Power supply 26 Power supply request switch 27 Coil 28 Capacitor 29 Capacitor 30 Capacitor 31 Rectification smoothing circuit 32 Relay coil 33 Relay contact 34 Magnetic core 35 Voltage detector A Ground B Vehicle C Power supply stand D Metal foreign object F Magnetic flux (component)
f Magnetic flux (component)
G Air gap H Magnetic field direction h Magnetic field direction L Load

Claims (11)

A transmission device used together with a non-contact power feeding device, wherein the non-contact power feeding device has an air gap from a power feeding side coil of a power feeding side circuit to a power receiving side coil of a power receiving side circuit based on a mutual induction action of electromagnetic induction. And can supply power while being in close proximity,
Based on the mutual induction action of electromagnetic induction, the transmission device has a secondary side circuit disposed near the power feeding side coil from a primary side coil of the primary side circuit disposed near the power receiving side coil. The secondary coil is capable of transmitting minute electric power while having an air gap and a position corresponding to proximity.
The transmission device has a position detection function as to whether or not the power receiving side coil is in a positional relationship where power can be supplied, and the non-contact is performed on condition that a predetermined minute power is transmitted from the primary side coil to the secondary side coil. A power feeding instruction transmission device, wherein power feeding from a power feeding side coil of a power feeding device to a power receiving side coil is performed.   The power transmission instruction transmission device according to claim 1, wherein the primary coil is embedded in a central space of the power receiving coil, and the secondary coil is connected to the power feeding coil. A power supply instruction transmission device characterized by being embedded in a central space. The power transmission instruction transmission device according to claim 1 or 2, wherein the primary coil and the secondary coil of the transmission device are:
The coil surface and the generated magnetic field are composed of orthogonal winding coils that are orthogonal to the power receiving side coil and the coil surface of the power feeding side coil and the generated magnetic field of the non-contact power feeding device, such as a flat ferrite core. A power supply instruction transmission device, characterized in that it is wound around a magnetic core over both sides. The transmission apparatus for feeding instructions according to claim 1, wherein the transmission apparatus includes a resonance circuit,
When a metal foreign object is interposed between the primary side coil and the secondary side coil that are positioned close to each other, the metal foreign object detection function is exerted, the resonance point is shifted, and the output voltage of the secondary side coil is A power supply instruction transmission device, characterized in that the transmission of minute electric power is reduced, thereby disabling transmission of minute electric power.   5. The power transmission instruction transmission device according to claim 4, wherein the primary side coil is formed of a two-phase winding coil whose axis is shifted by 90 degrees, and a two-phase alternating current whose phase is shifted by 90 degrees is energized and generated. A transmission device for feeding instructions, characterized in that a rotating magnetic field that rotates the magnetic field is generated.   5. The transmission apparatus for feeding instructions according to claim 4, wherein the primary side coil is a three-phase winding coil whose axis is shifted by 120 degrees, and a three-phase alternating current is energized to rotate the generated magnetic field. Is generated, a power transmission instruction transmission device. In the power transmission instruction transmission device according to claim 1, a power supply request switch for energization on is attached to the primary circuit.
The secondary circuit is provided with a relay coil, which can be excited based on transmission of minute power, and based on the excitation of the relay coil, a relay contact provided in the power supply side circuit of the non-contact power feeding device The power supply instruction transmission device is characterized in that the power supply is performed while the relay contact is closed when the relay contact is closed.   The contactless power supply device according to claim 1, wherein power can be supplied by a stop power supply method in which the power receiving side coil is stopped at a position corresponding to the power supply side coil when power is supplied. A power transmission instruction transmission device.   9. The contactless power feeding device according to claim 8, wherein a battery is connected to the power receiving side circuit, and the transmission device is configured such that the minute power output voltage of the power source of the primary side circuit is proportional to the charging voltage of the battery. In addition, a transmission device for feeding instructions, characterized in that a voltage detector is provided in the secondary circuit. 10. The transmission device according to claim 9, wherein the minute power secondary voltage of the secondary circuit detected by the voltage detector is a minute power output voltage of the power supply of the primary circuit and the contactless power feeding device. Proportional to the charging voltage of the battery,
Thus, during power feeding, the state of charge of the battery can be recognized by the small power secondary voltage detected by the voltage detector, and power feeding by the non-contact power feeding device is performed based on the recognized state of charge of the battery. Is controllable,
A power supply instruction transmission device, characterized in that power supply power of a power supply side circuit of the non-contact power supply device can be controlled and whether power supply is continued or stopped.   The power feeding side circuit of the non-contact power feeding device and the secondary side circuit of the transmission device are fixedly disposed on the ground side according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10. In addition, a power feeding instruction transmission device, wherein a power receiving side circuit of the non-contact power feeding device and a primary side circuit of the transmission device are mounted on a moving body such as a vehicle.

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