JP6248703B2 - Contactless power supply - Google Patents

Description

  The present invention includes a power supply pad and a filter circuit having an inductor coil and connected to the power supply pad. The power supply pads are opposed to each other, and power is supplied from one power supply pad to the other power supply pad in a contactless manner. The present invention relates to a contact power supply device.

  Conventionally, a power supply pad and a filter circuit having an inductor coil connected to the power supply pad are provided, the power supply pads are opposed to each other, and power is supplied from one power supply pad to the other power supply pad in a contactless manner. As an apparatus, there exists an inductively coupled electric power transmission system currently disclosed by patent document 1 shown below, for example.

  This inductively coupled power transmission system includes a transformer, a loop conductor, and a pickup coil. A filter circuit is configured using the leakage inductance of the transformer. The transformer insulates the alternating current supplied to the loop conductor and converts it into a predetermined voltage. The filter circuit removes a predetermined frequency component contained in the isolated alternating current. When the pickup coil is opposed to the loop conductor, the pickup coil and the loop conductor are magnetically coupled. As a result, electric power can be supplied from the loop conductor to the pickup coil in a non-contact manner. Here, the loop conductor and the pickup coil correspond to the power supply pad. The leakage inductance of the transformer corresponds to the inductance of the inductor coil.

Special table 2009-528812

  By the way, when using a filter circuit in a non-contact power feeding device, an inductor coil having a core is generally used.

  On the other hand, in the inductively coupled power transmission system described above, a filter circuit is configured by using the leakage inductance of the transformer. Therefore, it is not necessary to separately provide an inductor coil having a core for the filter circuit, and the apparatus can be miniaturized.

  However, it can only be applied to devices with a transformer. Moreover, when the inductance required for the filter circuit is large, the leakage inductance of the transformer must be increased, and the efficiency of the transformer is reduced.

  The present invention has been made in view of such circumstances, and can be applied even when a transformer is not provided, as compared with a case where an inductor coil having a core is separately provided while ensuring the characteristics of a filter circuit. An object of the present invention is to provide a non-contact power feeding device that can be miniaturized.

  The present invention made in order to solve the above-described problems includes a power supply pad including a power supply core made of a magnetic material, a power supply coil provided on the power supply core and using the power supply core as a magnetic path, and an inductor coil. And a filter circuit connected to the power supply pad, the power supply pads connected to the filter circuit facing each other, and supplying power from one power supply pad to the other power supply pad in a contactless manner The inductor coil of at least one of the filter circuits is composed of a plurality of coils, and the plurality of coils are wired so that the currents induced by the magnetic flux generated by the power feeding coil cancel each other out. It is provided in a power feeding core of a power feeding pad to which a circuit is connected, and the power feeding core is used as a magnetic path.

  According to this configuration, the power feeding core of the power feeding pad is used as the core constituting the magnetic path of the inductor coil. Therefore, it is applicable even when a transformer is not provided. In addition, the non-contact power feeding device can be downsized as compared with the case where an inductor coil having a core is separately provided. In addition, the inductor coil includes a plurality of coils, and is configured by wiring the plurality of coils so that currents induced by the magnetic flux generated by the power feeding coil cancel each other. Therefore, the coupling coefficient between the inductor coil and the power feeding coil becomes almost zero, and the influence of the magnetic flux generated by the power feeding coil can be suppressed as much as possible. Therefore, the characteristics of the filter circuit can be ensured.

It is a circuit diagram of the non-contact electric power feeder in 1st Embodiment. It is a top view of a power transmission side pad. It is AA arrow sectional drawing of FIG. It is a BB arrow sectional view of Drawing 2. It is CC sectional view taken on the line of FIG. It is explanatory drawing corresponding to FIG. 2 for demonstrating the flow of the electric current of a power transmission side pad. It is explanatory drawing corresponding to FIG. 3 for demonstrating the flow of the magnetic flux of a power transmission side pad. It is explanatory drawing corresponding to FIG. 4 for demonstrating the flow of the magnetic flux of a power transmission side pad. It is explanatory drawing corresponding to FIG. 5 for demonstrating the flow of the magnetic flux of a power transmission side pad. FIG. 2 is a circuit diagram of a power transmission circuit and a power reception circuit shown in FIG. 1. It is a top view of the core for demonstrating arrangement | positioning of an inductor coil. It is a rear view of the core for demonstrating arrangement | positioning of an inductor coil. It is DD sectional view taken on the line of FIG. It is explanatory drawing corresponding to FIG. 11 for demonstrating the flow of the electric current of an inductor coil. It is explanatory drawing corresponding to FIG. 12 for demonstrating the flow of the electric current of an inductor coil. It is explanatory drawing corresponding to FIG. 13 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the electric current of the inductor coil generate | occur | produced with the magnetic flux of a power transmission side pad. It is a top view of the core for demonstrating arrangement | positioning of the inductor coil of the non-contact electric power supply in 2nd Embodiment. It is a rear view of the core for demonstrating arrangement | positioning of an inductor coil. It is EE arrow sectional drawing of FIG. It is explanatory drawing corresponding to FIG. 19 for demonstrating the flow of the electric current of an inductor coil. It is explanatory drawing corresponding to FIG. 20 for demonstrating the flow of the electric current of an inductor coil. It is explanatory drawing corresponding to FIG. 21 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the electric current of the inductor coil generate | occur | produced with the magnetic flux of a power transmission side pad. It is a top view of the core for demonstrating arrangement | positioning of the inductor coil of the non-contact electric power feeder in 3rd Embodiment. It is FF arrow sectional drawing of FIG. It is explanatory drawing corresponding to FIG. 27 for demonstrating the flow of the electric current of an inductor coil. It is explanatory drawing corresponding to FIG. 28 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the electric current of the inductor coil generate | occur | produced with the magnetic flux of a power transmission side pad. It is a top view of the core for demonstrating arrangement | positioning of the inductor coil of the non-contact electric power supply in 4th Embodiment. It is a left view of the core for demonstrating arrangement | positioning of an inductor coil. It is GG arrow sectional drawing of FIG. It is HH arrow sectional drawing of FIG. It is explanatory drawing corresponding to FIG. 33 for demonstrating the flow of the electric current of an inductor coil. It is explanatory drawing corresponding to FIG. 34 for demonstrating the flow of the electric current of an inductor coil. It is explanatory drawing corresponding to FIG. 35 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing corresponding to FIG. 36 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the electric current of the inductor coil generate | occur | produced with the magnetic flux of a power transmission side pad. It is a top view of the core for demonstrating arrangement | positioning of the inductor coil of the non-contact electric power feeder in 5th Embodiment. It is a left view of the core for demonstrating arrangement | positioning of an inductor coil. It is a right view of the core for demonstrating arrangement | positioning of an inductor coil. It is II sectional view taken on the line of FIG. It is explanatory drawing corresponding to FIG. 44 for demonstrating the flow of the electric current of an inductor coil. It is explanatory drawing corresponding to FIG. 45 for demonstrating the flow of the electric current of an inductor coil. It is explanatory drawing corresponding to FIG. 46 for demonstrating the flow of the electric current of an inductor coil. It is explanatory drawing corresponding to FIG. 47 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing corresponding to FIG. 45 for demonstrating the flow of the electric current of the inductor coil generated with the magnetic flux of a power transmission side pad. It is explanatory drawing corresponding to FIG. 46 for demonstrating the flow of the electric current of the inductor coil generate | occur | produced with the magnetic flux of a power transmission side pad. It is a top view of the core for demonstrating arrangement | positioning of the inductor coil of the non-contact electric power supply in 6th Embodiment. It is a rear view of the core for demonstrating arrangement | positioning of an inductor coil. It is JJ arrow sectional drawing of FIG. It is explanatory drawing corresponding to FIG. 56 for demonstrating the electric current flow of an inductor coil. It is explanatory drawing corresponding to FIG. 57 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the electric current of the inductor coil generate | occur | produced with the magnetic flux of a power transmission side pad. It is a top view of the core for demonstrating arrangement | positioning of the inductor coil of the non-contact electric power supply in 7th Embodiment. It is a rear view of the core for demonstrating arrangement | positioning of an inductor coil. FIG. 63 is a cross-sectional view taken along arrow KK in FIG. 62. FIG. 64 is an explanatory diagram corresponding to FIG. 63 for illustrating the current flow of the inductor coil. FIG. 65 is an explanatory diagram corresponding to FIG. 64 for describing the flow of magnetic flux in the inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the electric current of the inductor coil generate | occur | produced with the magnetic flux of a power transmission side pad. It is a top view of the core for demonstrating arrangement | positioning of the inductor coil of the non-contact electric power supply in 8th Embodiment. It is LL arrow sectional drawing of FIG. FIG. 70 is an explanatory diagram corresponding to FIG. 69 for illustrating a current flow of the inductor coil. It is explanatory drawing corresponding to FIG. 70 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the electric current of the inductor coil generate | occur | produced with the magnetic flux of a power transmission side pad. It is a top view of the power transmission side pad of the non-contact electric power feeder in 9th Embodiment. It is a rear view of a power transmission side pad. It is MM arrow sectional drawing of FIG. FIG. 76 is an explanatory diagram corresponding to FIG. 75 for illustrating a current flow of a power transmission side pad. FIG. 77 is an explanatory diagram corresponding to FIG. 76 for describing the current flow of the power transmission side pad. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is a top view of the power transmission side pad of the non-contact electric power supply in 10th Embodiment. It is NN arrow sectional drawing of FIG. It is explanatory drawing corresponding to FIG. 81 for demonstrating the flow of the electric current of a power transmission side pad. It is explanatory drawing corresponding to FIG. 82 for demonstrating the flow of the electric current of a power transmission side pad. It is explanatory drawing corresponding to FIG. 11 for demonstrating the flow of the electric current of an inductor coil. It is explanatory drawing corresponding to FIG. 12 for demonstrating the flow of the electric current of an inductor coil. It is explanatory drawing corresponding to FIG. 13 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the electric current of the inductor coil generate | occur | produced with the magnetic flux of a power transmission side pad. It is explanatory drawing corresponding to FIG. 19 for demonstrating the flow of the electric current of the inductor coil of the non-contact electric power supply in 11th Embodiment. It is explanatory drawing corresponding to FIG. 20 for demonstrating the flow of the electric current of an inductor coil. It is explanatory drawing corresponding to FIG. 21 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the electric current of the inductor coil generate | occur | produced with the magnetic flux of a power transmission side pad. It is explanatory drawing corresponding to FIG. 27 for demonstrating the flow of the electric current of the inductor coil of the non-contact electric power supply in 12th Embodiment. It is explanatory drawing corresponding to FIG. 28 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the electric current of the inductor coil generate | occur | produced with the magnetic flux of a power transmission side pad. It is explanatory drawing corresponding to FIG. 33 for demonstrating the flow of the electric current of the inductor coil of the non-contact electric power supply in 13th Embodiment. It is explanatory drawing corresponding to FIG. 34 for demonstrating the flow of the electric current of an inductor coil. It is explanatory drawing corresponding to FIG. 35 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing corresponding to FIG. 36 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the electric current of the inductor coil generate | occur | produced with the magnetic flux of a power transmission side pad. It is explanatory drawing corresponding to FIG. 69 for demonstrating the flow of the electric current of the inductor coil of the non-contact electric power supply in 14th Embodiment. It is explanatory drawing corresponding to FIG. 70 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the electric current of the inductor coil generate | occur | produced with the magnetic flux of a power transmission side pad. It is a circuit diagram of the power transmission circuit and power receiving circuit of the non-contact electric power feeder in 15th Embodiment. It is a top view of the core for demonstrating arrangement | positioning of an inductor coil. It is OO arrow sectional drawing of FIG. It is explanatory drawing corresponding to FIG. 111 for demonstrating the electric current flow of an inductor coil. It is explanatory drawing corresponding to FIG. 112 for demonstrating the flow of the magnetic flux of an inductor coil. It is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. It is explanatory drawing for demonstrating the flow of the electric current of the inductor coil generate | occur | produced with the magnetic flux of a power transmission side pad. It is a top view of the core for demonstrating the deformation | transformation form of a core and an inductor coil.

  Next, the present invention will be described in more detail with reference to embodiments. In the present embodiment, an example in which the non-contact power feeding device according to the present invention is applied to a non-contact power feeding device that transmits power in a non-contact manner to a main battery mounted on an electric vehicle or a hybrid vehicle is shown.

(First embodiment)
First, the configuration of the non-contact power feeding device according to the first embodiment will be described with reference to FIGS. In addition, the front-back direction, the left-right direction, and the up-down direction in a figure show the direction in a vehicle.

  As shown in FIG. 1, an electric vehicle or a hybrid vehicle includes a motor generator MG, a main battery B1, an inverter circuit INV, an auxiliary machine S, an auxiliary battery B2, a DC / DC converter circuit CNV, and a controller. CNT.

  The motor generator MG is a device that operates as a motor by supplying three-phase alternating current and generates a driving force for traveling of the vehicle. Further, when the vehicle is decelerated, it is a device that operates as a generator by rotating with an external driving force and generates a three-phase alternating current.

  The main battery B1 is a chargeable / dischargeable power source that outputs a DC high voltage.

  The inverter circuit INV is a circuit that converts the direct current output from the main battery B1 into a three-phase alternating current and supplies it to the motor generator MG when the motor generator MG operates as a motor. Further, when the motor generator MG operates as a generator, it is also a circuit that converts the three-phase alternating current output from the motor generator MG into a direct current and supplies it to the main battery B1.

  The auxiliary machine S is a peripheral device such as a wiper device or an electric power steering device that operates by supplying a DC low voltage.

  The auxiliary battery B2 is a chargeable / dischargeable power source that outputs a DC low voltage.

  The DC / DC converter circuit CNV is a circuit that converts the DC high voltage output from the main battery B1 into a DC low voltage and supplies the converted voltage to the auxiliary battery B2 and the auxiliary machine S.

  The controller CNT is a device that controls the inverter circuit INV, the DC / DC converter circuit CNV, and the auxiliary machine S based on information on the main battery B1, the auxiliary battery B2, and the motor generator MG.

  The non-contact power supply device 1 is a device that supplies power to the main battery B1 mounted on the vehicle in a non-contact manner from an external power source PS installed outside the vehicle, and charges the main battery B1. The non-contact power supply device 1 includes a power transmission side pad 10 (power supply pad), a power transmission circuit 11, a power reception side pad 12, and a power reception circuit 13.

The power transmission side pad 10 is installed at a predetermined position on the ground surface in the parking space facing the power receiving side pad 12 installed at the bottom of the vehicle when the vehicle is parked in the parking space. It is a device that generates. As shown in FIGS. 2 to 5, the power transmission side pad 10 includes a core 100 (power feeding core) and coils 101 and 102 (power feeding coils).
Here, FIG. 3 is a cross-sectional view taken along the line AA of FIG. 4 is a cross-sectional view taken along line BB in FIG. 5 is a cross-sectional view taken along the line CC in FIG.

  The core 100 is a rectangular parallelepiped member made of a magnetic material and constituting a magnetic path. Specifically, it is a member made of ferrite or a dust core.

  The coils 101 and 102 are substantially rectangular annular members that are formed by winding conductive wires and generate magnetic flux when current flows. The coils 101 and 102 are arranged on the upper surface of the core 100 so as to be adjacent to each other in the front-rear direction with the axial direction of the core 101 being the vertical direction, and the core 100 is used as a magnetic path. Here, the axial direction of the coils 101 and 102 is a normal direction to the inner plane that passes through the axial centers of the annular coils 101 and 102 and is surrounded by the annular coils 101 and 102. The axial direction passes through the center of gravity of the annular coils 101 and 102. As shown in FIG. 6, when a current flows through the coils 101 and 102, a magnetic flux is generated as shown in FIGS. When a reverse current flows, a reverse magnetic flux is generated. Here, FIGS. 7 to 9 are explanatory views corresponding to the cross-sectional views of FIGS. 3 to 5 for explaining the flow of the magnetic flux of the power transmission side pad.

  The power transmission circuit 11 illustrated in FIG. 1 transmits and receives information to and from the power reception circuit 13 through wireless communication, converts the output of the external power source PS into high-frequency alternating current based on the received information, and supplies the high-frequency alternating current to the power transmission side pad 10. Circuit. As shown in FIG. 10, the power transmission circuit 11 includes a power conversion circuit 110, a filter circuit 111, and a resonance capacitor 112, and is installed outside the vehicle.

  The power conversion circuit 110 is a circuit that converts the output of the external power source PS into a high-frequency alternating current and outputs the alternating current. The input end of the power conversion circuit 110 is connected to the external power source PS, and the output end is connected to the filter circuit 111 and the power transmission side pad 10.

  The filter circuit 111 is a circuit that removes a predetermined frequency component included in the alternating current supplied from the power conversion circuit 110. The filter circuit 111 includes an inductor coil 1110 and a capacitor 1111.

  As shown in FIGS. 11 to 13, the inductor coil 1110 is a substantially rectangular annular element configured by winding a conducting wire. Here, FIG. 13 is a cross-sectional view taken along the arrow D-D in FIG. 11. The inductor coil 1110 is configured by two substantially rectangular annular coils COIL1 and COIL2. And it is provided in the core 100 of the power transmission side pad 10, and uses the core 100 as a magnetic path.

  The coils COIL1 and COIL2 are wired so that currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. The coil COIL1 is disposed on the front surface of the core 100 with its own axial direction being the front-rear direction. The coil COIL2 is disposed on the rear surface of the core 100 in a state where its own axial direction is the front-rear direction. Here, the axial direction is a normal direction with respect to an inner plane passing through the axial centers of the annular coils COIL1 and COIL2 and surrounded by the annular coils COIL1 and COIL2. The axial direction passes through the center of gravity of the annular coils COIL1, COIL2. The coils COIL1 and COIL2 are wired so that when the current flows through the inductor coil 1110, the current as shown in FIGS. 14 and 15 flows. In this case, a magnetic flux as shown in FIG. 16 is generated. Here, FIG. 16 is an explanatory view corresponding to the cross-sectional view of FIG. 13 for explaining the flow of magnetic flux of the inductor coil.

  As shown in FIG. 6, when a current flows through the coils 101 and 102 and a magnetic flux is generated as shown in FIGS. 7 to 9, the magnetic flux flows inside and around the core 100 as shown in FIG. 17. Here, FIG. 17 is an explanatory diagram for explaining the flow of magnetic flux of the power transmission side pad and the inductor coil. As a result, currents as shown in FIG. 18 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 14 flows. Therefore, the currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. Therefore, the influence of the magnetic flux generated by the coils 101 and 102 can be suppressed as much as possible.

  As shown in FIG. 10, the inductor coil 1110 and the capacitor 1111 are connected in series. One end of the inductor coil 1110 is connected to the output end of the power conversion circuit 110, and one end of the capacitor 1111 is connected to the power transmission side pad 10.

  The resonance capacitor 112 is a circuit that forms a resonance circuit together with the coils 101 and 102 of the power transmission side pad 10. The resonance capacitor 112 is connected in parallel to the power transmission side pad 10.

  The power receiving side pad 12 shown in FIG. 1 is installed at the bottom of the vehicle, and when the vehicle is parked in the parking space, the power receiving side pad 12 is disposed to face the power transmitting side pad 10 with an interval in the vertical direction. It is a device that generates alternating current by electromagnetic induction when the generated alternating magnetic flux is interlinked. The power receiving side pad 12 includes a core and a coil. The power reception side pad 12 has the same configuration as the power transmission side pad 10 and is installed upside down.

  The power receiving circuit 13 is a circuit that transmits and receives information to and from the power transmitting circuit 11 by wireless communication, converts the alternating current supplied from the power receiving side pad 12 to direct current based on the received information, and charges the main battery B1. . As shown in FIG. 10, the power receiving circuit 13 includes a resonance capacitor 130, a filter circuit 131, and a power conversion circuit 132.

The resonance capacitor 130 is a circuit that forms a resonance circuit together with the coil of the power receiving side pad 12. The resonance capacitor 130 is connected in parallel to the power receiving side pad 12.

  The filter circuit 131 is a circuit that removes a predetermined frequency component included in the alternating current supplied from the power receiving side pad 12 to which the resonance capacitor 130 is connected. The filter circuit 131 includes a capacitor 1310 and an inductor coil 1311.

  The inductor coil 1311 has the same configuration as the inductor coil 1110, is provided in the core of the power receiving side pad 12, and uses the core as a magnetic path. Therefore, similarly to the inductor coil 1110, the influence of the magnetic flux generated by the coil of the power receiving side pad 12 can be suppressed as much as possible.

  The capacitor 1310 and the inductor coil 1311 are connected in series. One end of the capacitor 1310 is connected to the power receiving side pad 12, and one end of the inductor coil 1311 is connected to the power conversion circuit 132.

  The power conversion circuit 132 is a circuit that converts alternating current supplied via the filter circuit 131 into direct current and supplies the direct current to the main battery B1. The input end of the power conversion circuit 132 is connected to the filter circuit 131 and the power receiving side pad 12, and the output end is connected to the main battery B1.

  Next, the operation of the non-contact power feeding device will be described with reference to FIGS. 1 and 10.

  As shown in FIG. 1, when a vehicle is parked in the parking space, the power transmission side pad 10 and the power reception side pad 12 face each other with a predetermined interval in the vertical direction. In this state, when a charge start button (not shown) is pressed and the start of charging is instructed, the power transmission circuit 11 and the power reception circuit 13 transmit and receive information by wireless communication.

  The power conversion circuit 110 shown in FIG. 10 converts the output of the external power supply PS into a high-frequency alternating current and outputs it. The filter circuit 111 removes a predetermined frequency component included in the alternating current supplied from the power conversion circuit 110. The power transmission side pad 10 to which the resonance capacitor 112 is connected generates alternating magnetic flux when AC is supplied through the filter circuit 111.

  The magnetic flux generated by the power transmission side pad 10 flows in and around the core 100 as shown in FIG. As a result, currents as shown in FIG. 18 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 14 flows. Therefore, the currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. Therefore, the influence of the magnetic flux generated by the coils 101 and 102 can be suppressed as much as possible. Thereby, the characteristics of the filter circuit 111 can be ensured.

  The power receiving side pad 12 connected to the resonance capacitor 130 is linked to the alternating magnetic flux generated by the power transmitting side pad 10 to generate an alternating current by electromagnetic induction. The filter circuit 131 removes a predetermined frequency component included in the alternating current supplied from the power receiving side pad 12 to which the resonance capacitor 130 is connected.

  The magnetic flux generated by the power receiving side pad 12 flows inside and around the core. However, the inductor coil 1311 has the same configuration as the inductor coil 1110. Therefore, the currents induced by the magnetic flux generated by the coil of the power receiving side pad 12 cancel each other. Therefore, the influence of the magnetic flux generated by the coil of the power receiving side pad 12 can be suppressed as much as possible. Thereby, the characteristics of the filter circuit 131 can be ensured.

  The power conversion circuit 132 converts alternating current supplied via the filter circuit 131 into direct current and supplies the direct current to the main battery B1. In this way, power can be supplied from the external power source PS to the main battery B1 in a non-contact manner to charge the main battery B1.

  Next, the effect of the non-contact power feeding device of the first embodiment will be described.

  According to the first embodiment, the inductor coil 1110 of the filter circuit 11 is provided in the core 100 of the power transmission side pad 10 to which the filter circuit 11 is connected, and the core 100 is used as a magnetic path. In other words, the core 100 of the power transmission side pad 10 is used as the core constituting the magnetic path of the inductor coil 1110. Therefore, it is applicable even when a transformer is not provided. Moreover, the non-contact electric power feeder 1 can be reduced in size compared with the case where the inductor coil which has a core is provided separately. In addition, the inductor coil 1110 includes two coils COIL1 and COIL2, and is configured by wiring the coils COIL1 and COIL2 so that the currents induced by the magnetic fluxes generated by the coils 101 and 102 of the power transmission side pad 10 cancel each other. Has been. Therefore, the coupling coefficient between the inductor coil 1110 and the coils 101 and 102 becomes almost zero, and the influence of the magnetic flux generated by the coils 101 and 102 can be suppressed as much as possible. Therefore, the characteristics of the filter circuit 111 can be ensured.

  According to the first embodiment, the inductor coil 1110 is provided on the surface of the core 100. Therefore, an inductor coil having a core can be easily configured.

(Second Embodiment)
Next, the non-contact power feeding device of the second embodiment will be described. The contactless power supply device of the second embodiment is obtained by changing only the shape and arrangement of the inductor coil with respect to the contactless power supply device of the first embodiment. Except for the inductor coil, the contactless power supply device of the first embodiment is the same. Therefore, only the configuration of the inductor coil will be described with reference to FIGS. 19 to 26, and the description of the operation will be omitted. In addition, the same component as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIGS. 19 to 21, the inductor coil 1110 is a substantially rectangular annular element configured by winding a conducting wire. Here, FIG. 21 is a cross-sectional view taken along the line EE of FIG. The inductor coil 1110 is configured by two substantially rectangular annular coils COIL1 and COIL2. And it is provided in the core 100 of the power transmission side pad 10, and uses the core 100 as a magnetic path.

  The coils COIL1 and COIL2 are wired so that currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. The coil COIL1 is disposed on the front side of the core 100 on the left side of the central portion in the left-right direction with its own axial direction set in the front-rear direction. The coil COIL2 is disposed on the rear surface of the core 100 on the left side of the central portion in the left-right direction with its own axial direction set to the front-rear direction. The coils COIL1 and COIL2 are wired so that when the current flows through the inductor coil 1110, the current as shown in FIGS. In this case, a magnetic flux as shown in FIG. 24 is generated. Here, FIG. 24 is an explanatory diagram corresponding to the cross-sectional view of FIG. 21 for explaining the flow of magnetic flux of the inductor coil 1110.

  When a current flows through the coils 101 and 102 and a magnetic flux is generated, the magnetic flux flows in and around the core 100 as shown in FIG. Here, FIG. 25 is an explanatory diagram for explaining the flow of magnetic flux of the power transmission side pad and the inductor coil. As a result, currents as shown in FIG. 26 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 22 flows. Therefore, the currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. Therefore, the influence of the magnetic flux generated by the coils 101 and 102 can be suppressed as much as possible.

  Next, the effect of the non-contact power feeding device of the second embodiment will be described. According to the second embodiment, the same effect as that of the first embodiment can be obtained.

(Third embodiment)
Next, the non-contact electric power feeder of 3rd Embodiment is demonstrated. The contactless power supply device of the third embodiment is obtained by changing only the shape and arrangement of the inductor coil with respect to the contactless power supply device of the first embodiment. Except for the inductor coil, the contactless power supply device of the first embodiment is the same. Therefore, only the configuration of the inductor coil will be described with reference to FIGS. 27 to 32, and the description of the operation will be omitted. In addition, the same component as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIGS. 27 and 28, the inductor coil 1110 is a substantially rectangular annular element configured by winding a conducting wire. Here, FIG. 28 is a cross-sectional view taken along line FF in FIG. The inductor coil 1110 is configured by two substantially rectangular annular coils COIL1 and COIL2. And it is provided in the core 100 of the power transmission side pad 10, and uses the core 100 as a magnetic path.

  The coils COIL1 and COIL2 are wired so that currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. The coil COIL1 is disposed on the upper surface of the core 100 in the front side of the center part in the front-rear direction, with its own axial direction being the vertical direction. The coil COIL2 is disposed on the upper surface of the core 100 on the rear side from the center portion in the front-rear direction, with its own axial direction being the vertical direction. When a current flows through the inductor coil 1110, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 29 flows. In this case, a magnetic flux as shown in FIG. 30 is generated. Here, FIG. 30 is an explanatory view corresponding to the cross-sectional view of FIG. 28 for explaining the flow of magnetic flux in the inductor coil.

  When a current flows through the coils 101 and 102 and a magnetic flux is generated, the magnetic flux flows in and around the core 100 as shown in FIG. Here, FIG. 31 is an explanatory diagram for explaining the flow of magnetic flux of the power transmission side pad and the inductor coil. As a result, currents as shown in FIG. 31 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 29 flows. Therefore, the currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. Therefore, the influence of the magnetic flux generated by the coils 101 and 102 can be suppressed as much as possible.

  Next, the effect of the non-contact power feeding device of the third embodiment will be described. According to the third embodiment, the same effect as that of the first embodiment can be obtained.

(Fourth embodiment)
Next, the non-contact electric power feeder of 4th Embodiment is demonstrated. The contactless power supply device of the fourth embodiment is obtained by changing only the shape and arrangement of the inductor coil with respect to the contactless power supply device of the first embodiment. Except for the inductor coil, the contactless power supply device of the first embodiment is the same. Therefore, only the configuration of the inductor coil will be described with reference to FIGS. 33 to 43, and the description of the operation will be omitted. In addition, the same component as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIGS. 33 to 36, the inductor coil 1110 is a substantially rectangular annular element configured by winding a conducting wire. Here, FIG. 35 is a cross-sectional view taken along the line GG in FIG. 36 is a cross-sectional view taken along line HH in FIG. The inductor coil 1110 is configured by two substantially rectangular annular coils COIL1 and COIL2. And it is provided in the core 100 of the power transmission side pad 10, and uses the core 100 as a magnetic path.

  The coils COIL1 and COIL2 are wired so that currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. The coil COIL1 is disposed on the left side surface of the core 100 in a state where its own axial center direction is the left-right direction and on the front side from the center portion in the front-rear direction. The coil COIL2 is disposed on the left side surface of the core 100 on the left side of the core 100 with the axis direction of the coil CO2 in the left-right direction and on the rear side from the center portion in the front-rear direction. The coils COIL1 and COIL2 are wired so that when the current flows through the inductor coil 1110, the current as shown in FIGS. In this case, a magnetic flux as shown in FIGS. 39 and 40 is generated. Here, FIGS. 39 and 40 are explanatory views corresponding to the cross-sectional views taken along the arrows in FIGS. 35 and 36 for explaining the flow of magnetic flux in the inductor coil.

  When a current flows through the coils 101 and 102 and a magnetic flux is generated, the magnetic flux flows in and around the core 100 as shown in FIGS. 41 and 42. Here, FIG.41 and FIG.42 is explanatory drawing for demonstrating the flow of the magnetic flux of a power transmission side pad and an inductor coil. As a result, currents as shown in FIG. 43 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 38 flows. Therefore, the currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. Therefore, the influence of the magnetic flux generated by the coils 101 and 102 can be suppressed as much as possible.

  Next, the effect of the non-contact power feeding device of the fourth embodiment will be described. According to the fourth embodiment, the same effect as in the first embodiment can be obtained.

(Fifth embodiment)
Next, the non-contact electric power feeder of 5th Embodiment is demonstrated. The contactless power supply device of the fifth embodiment is obtained by changing only the shape and arrangement of the inductor coil with respect to the contactless power supply device of the first embodiment. Except for the inductor coil, the contactless power supply device of the first embodiment is the same. Therefore, only the configuration of the inductor coil will be described with reference to FIGS. 44 to 54, and the description of the operation will be omitted. In addition, the same component as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIGS. 44 to 47, the inductor coil 1110 is a substantially rectangular annular element configured by winding a conducting wire. Here, FIG. 47 is a cross-sectional view taken along the line II of FIG. The inductor coil 1110 is configured by two substantially rectangular annular coils COIL1 and COIL2. And it is provided in the core 100 of the power transmission side pad 10, and uses the core 100 as a magnetic path.

  The coils COIL1 and COIL2 are wired so that currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. The coil COIL1 is disposed on the left side of the core 100 on the left side of the core 100 in a state where the axial direction of the coil COIL1 is in the left-right direction, and on the rear side from the central portion in the front-rear direction. The coil COIL2 is disposed on the right side surface of the core 100 and on the rear side from the center portion in the front-rear direction, with its own axial direction being the left-right direction. The coils COIL1 and COIL2 are wired so that when the current flows through the inductor coil 1110, the current as shown in FIGS. In this case, a magnetic flux as shown in FIG. 51 is generated. Here, FIG. 51 is an explanatory view corresponding to the cross-sectional view of FIG. 47 for explaining the flow of magnetic flux in the inductor coil.

  When a current flows through the coils 101 and 102 and a magnetic flux is generated, the magnetic flux flows in and around the core 100 as shown in FIG. Here, FIG. 52 is an explanatory diagram for explaining the flow of magnetic flux of the power transmission side pad and the inductor coil. As a result, currents as shown in FIGS. 53 and 54 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIGS. 49 and 50 flows. Therefore, the currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. Therefore, the influence of the magnetic flux generated by the coils 101 and 102 can be suppressed as much as possible.

  Next, the effect of the non-contact power feeding device of the fifth embodiment will be described. According to the fifth embodiment, the same effect as that of the first embodiment can be obtained.

(Sixth embodiment)
Next, the non-contact electric power feeder of 6th Embodiment is demonstrated. The contactless power supply device of the sixth embodiment is obtained by changing only the shape and arrangement of the inductor coil with respect to the contactless power supply device of the first embodiment. Except for the inductor coil, the contactless power supply device of the first embodiment is the same. Therefore, only the configuration of the inductor coil will be described with reference to FIGS. 55 to 61, and the description of the operation will be omitted. In addition, the same component as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIGS. 55 to 57, the inductor coil 1110 is a substantially rectangular annular element configured by winding a conducting wire. Here, FIG. 57 is a cross-sectional view taken along line JJ of FIG. The inductor coil 1110 is configured by two substantially rectangular annular coils COIL1 and COIL2. And it is provided in the core 100 of the power transmission side pad 10, and uses the core 100 as a magnetic path.

  The coils COIL1 and COIL2 are wired so that currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. The coil COIL1 is embedded in the vicinity of the center portion of the core 100 in the front-rear direction and above the center portion in the up-down direction, with its axial direction being the front-rear direction. A substantially quadrangular columnar axial center portion 1110a of the coil COIL1 is formed of the magnetic material of the core 100, not the air layer. The coil COIL2 is embedded adjacent to the coil COIL1 in the vicinity of the center portion of the core 100 in the front-rear direction and below the center portion in the up-down direction, with the axial direction of the coil COIL2 being the front-rear direction. The substantially square pillar-shaped axial center portion 1110b of the coil COIL2 is formed of the magnetic material of the core 100, not the air layer. Here, the axial center portions 1110a and 1110b are inner portions surrounded by the annular coils COIL and COIL2, and are columnar portions extending in the axial direction. When a current flows through the inductor coil 1110, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 58 flows. In this case, a magnetic flux as shown in FIG. 59 is generated. Here, FIG. 59 is an explanatory diagram corresponding to the cross-sectional view of FIG. 57 for explaining the flow of magnetic flux in the inductor coil.

  When a current flows through the coils 101 and 102 and a magnetic flux is generated, the magnetic flux flows in and around the core 100 as shown in FIG. Here, FIG. 60 is an explanatory diagram for explaining the flow of magnetic flux of the power transmission side pad and the inductor coil. As a result, currents as shown in FIG. 61 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 58 flows. Therefore, the currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. Therefore, the influence of the magnetic flux generated by the coils 101 and 102 can be suppressed as much as possible.

  Next, effects of the non-contact power feeding device according to the sixth embodiment will be described.

  According to the sixth embodiment, similarly to the first embodiment, the non-contact power feeding device 1 can be reduced in size as compared with the case where an inductor coil having a core is separately provided. In addition, the characteristics of the filter circuit 111 can be ensured.

  According to the sixth embodiment, the inductor coil 1110 is embedded in the core 100. Therefore, the magnetic flux generated by the inductor coil 1110 is difficult to leak out of the core 100. That is, the magnetic flux generated by the inductor coil 1110 hardly links the coils 101 and 102 disposed on the upper surface of the core 100. Therefore, the influence of the magnetic flux generated by the inductor coil 1110 can be suppressed as much as possible.

(Seventh embodiment)
Next, the non-contact electric power feeder of 7th Embodiment is demonstrated. The contactless power supply device of the seventh embodiment is obtained by changing only the shape and arrangement of the inductor coil with respect to the contactless power supply device of the first embodiment. Except for the inductor coil, the contactless power supply device of the first embodiment is the same. Therefore, only the configuration of the inductor coil will be described with reference to FIGS. 62 to 68, and the description of the operation will be omitted. In addition, the same component as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIGS. 62 to 64, the inductor coil 1110 is a substantially rectangular annular element configured by winding a conducting wire. Here, FIG. 64 is a cross-sectional view taken along the line KK of FIG. The inductor coil 1110 is configured by two substantially rectangular annular coils COIL1 and COIL2. And it is provided in the core 100 of the power transmission side pad 10, and uses the core 100 as a magnetic path.

  The coils COIL1 and COIL2 are wired so that currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. The coil COIL 1 is embedded slightly above the center portion in the front-rear direction of the core 100 and above the center portion in the up-down direction, with its own axial direction being the front-rear direction. A substantially quadrangular columnar axial center portion 1110a of the coil COIL1 is formed of the magnetic material of the core 100, not the air layer. The coil COIL2 is embedded in the front and rear direction of the core 100 slightly behind the center portion in the front and rear direction of the core 100 and below the center portion in the up and down direction and adjacent to the coil COIL1 in a state where the coil center direction is the front and rear direction. Yes. The substantially square pillar-shaped axial center portion 1110b of the coil COIL2 is formed of the magnetic material of the core 100, not the air layer. When a current flows through the inductor coil 1110, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 65 flows. In this case, a magnetic flux as shown in FIG. 66 is generated. Here, FIG. 66 is an explanatory view corresponding to the cross-sectional view of FIG. 64 for explaining the flow of magnetic flux of the inductor coil.

  When a current flows through the coils 101 and 102 and a magnetic flux is generated, the magnetic flux flows in and around the core 100 as shown in FIG. Here, FIG. 67 is an explanatory diagram for explaining the flow of magnetic flux of the power transmission side pad and the inductor coil. As a result, currents as shown in FIG. 68 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 65 flows. Therefore, the currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. Therefore, the influence of the magnetic flux generated by the coils 101 and 102 can be suppressed as much as possible. Next, effects of the non-contact power feeding device according to the seventh embodiment will be described. According to the seventh embodiment, the same effect as in the sixth embodiment can be obtained.

(Eighth embodiment)
Next, the non-contact electric power feeder of 8th Embodiment is demonstrated. The contactless power supply device of the eighth embodiment is obtained by changing only the shape and arrangement of the inductor coil with respect to the contactless power supply device of the first embodiment. Except for the inductor coil, the contactless power supply device of the first embodiment is the same. Therefore, only the configuration of the inductor coil will be described with reference to FIGS. 69 to 74, and the description of the operation will be omitted. In addition, the same component as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIGS. 69 and 70, the inductor coil 1110 is a substantially rectangular annular element configured by winding a conducting wire. Here, FIG. 70 is a cross-sectional view taken along line LL in FIG. The inductor coil 1110 is configured by two substantially rectangular annular coils COIL1 and COIL2. And it is provided in the core 100 of the power transmission side pad 10, and uses the core 100 as a magnetic path.

  The coils COIL1 and COIL2 are wired so that currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. The coil COIL1 is embedded in the vicinity of the central portion in the vertical direction of the core 100 and in front of the central portion in the front-rear direction, with its own axial direction being the vertical direction. A substantially quadrangular columnar axial center portion 1110a of the coil COIL1 is formed of the magnetic material of the core 100, not the air layer. The coil COIL2 is embedded adjacent to the coil COIL1 in the vicinity of the central portion in the vertical direction of the core 100 and in the rear side of the central portion in the front-rear direction, with the axial direction of the coil COIL2 being vertical. The substantially square pillar-shaped axial center portion 1110b of the coil COIL2 is formed of the magnetic material of the core 100, not the air layer. When a current flows through the inductor coil 1110, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 71 flows. In this case, a magnetic flux as shown in FIG. 72 is generated. Here, FIG. 72 is an explanatory view corresponding to the cross-sectional view of FIG. 70 for explaining the flow of magnetic flux of the inductor coil.

  When a current flows through the coils 101 and 102 and a magnetic flux is generated, the magnetic flux flows in and around the core 100 as shown in FIG. Here, FIG. 73 is an explanatory diagram for explaining the flow of magnetic flux of the power transmission side pad and the inductor coil. As a result, currents as shown in FIG. 74 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 71 flows. Therefore, the currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. Therefore, the influence of the magnetic flux generated by the coils 101 and 102 can be suppressed as much as possible.

(Ninth embodiment)
Next, the non-contact electric power feeder of 9th Embodiment is demonstrated. The contactless power supply device of the ninth embodiment is obtained by changing only the coil configuration of the power transmission side pad and the power reception side pad with respect to the contactless power supply device of the first embodiment. Except for the coils of the power transmission side pad and the power reception side pad, the contactless power supply apparatus of the first embodiment is the same. Therefore, only the configuration of the coils of the power transmission side pad and the power reception side pad will be described with reference to FIGS. 75 to 80, and the description of the operation will be omitted. In addition, the same component as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIGS. 75 to 77, the power transmission side pad 10 includes a core 100 and a coil 103 (power feeding coil). Here, FIG. 77 is a cross-sectional view taken along line MM in FIG.

  The coil 103 is a substantially rectangular annular member that is formed by winding a conductive wire and generates a magnetic flux when a current flows. The coil 103 is disposed along the upper and lower surfaces and the left and right side surfaces of the core 100 in the vicinity of the central portion of the core 100 in the front-rear direction, with the axial direction of the coil 103 being the front-rear direction, and the core 100 is used as a magnetic path Yes. As shown in FIGS. 78 and 79, when a current flows through the coil 103, a magnetic flux is generated as shown in FIG. When a reverse current flows, a reverse magnetic flux is generated. Here, FIG. 80 is an explanatory diagram for explaining the flow of magnetic flux in the power transmission side pad and the inductor coil.

  The power reception side pad 12 has the same configuration as the power transmission side pad 10 and is installed upside down.

  When a current flows through the coil 103 and a magnetic flux is generated, the magnetic flux flows in and around the core 100 as shown in FIG. As a result, similarly to the first embodiment, currents as shown in FIG. 18 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 14 flows. Therefore, the currents induced by the magnetic flux generated by the coil 103 cancel each other. Therefore, the influence of the magnetic flux generated by the coil 103 can be suppressed as much as possible.

  The inductor coil 1311 has the same configuration as the inductor coil 1110.

  Next, effects of the non-contact power feeding device according to the ninth embodiment will be described. According to the ninth embodiment, the same effect as that of the first embodiment can be obtained.

(10th Embodiment)
Next, the non-contact electric power feeder of 10th Embodiment is demonstrated. The contactless power supply device of the tenth embodiment is different from the contactless power supply device of the first embodiment in that the coil configuration of the power transmission side pad and the power reception side pad is changed and the wiring of the inductor coil is changed accordingly. Is. Except for the coils of the power transmission side pad and the power reception side pad, and the wiring of the inductor coil, it is the same as the contactless power supply device of the first embodiment. Therefore, only the configuration of the coils of the power transmission side pad and the power reception side pad and the wiring of the inductor coil will be described with reference to FIGS. 81 to 89, and the description of the operation will be omitted. In addition, the same component as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIGS. 81 and 82, the power transmission side pad 10 includes a core 100 and a coil 104 (a power feeding coil). Here, FIG. 82 is a cross-sectional view taken along line NN in FIG.

  The coil 104 is a substantially rectangular annular member that is formed by winding a conductive wire and generates a magnetic flux when a current flows. The coil 104 is disposed in the vicinity of the center portion in the front-rear direction and the left-right direction of the upper surface of the core 100 with its own axial direction being the vertical direction, and uses the core 100 as a magnetic path. As shown in FIG. 83, when a current flows through the coil 104, a magnetic flux is generated as shown in FIG. When a reverse current flows, a reverse magnetic flux is generated. Here, FIG. 84 is an explanatory view corresponding to the cross-sectional view taken along the arrow in FIG. 82 for explaining the current flow of the power transmission side pad.

  The power reception side pad 12 has the same configuration as the power transmission side pad 10 and is installed upside down.

  As shown in FIGS. 85 to 87, the inductor coil 1110 is configured and arranged by two substantially rectangular coils COIL1 and COIL2 as in the first embodiment. However, since the flow of magnetic flux generated by the coil 104 is different from the flow of magnetic flux generated by the coils 101 and 102 of the first embodiment, the wiring of the coils COIL1 and COIL2 is different. Here, FIG. 87 is an explanatory view corresponding to the cross-sectional view of FIG. 13 for explaining the flow of magnetic flux of the inductor coil. When a current flows through the inductor coil 1110, the coils COIL1 and COIL2 are wired so that a current as shown in FIGS. 85 and 86 flows. In this case, a magnetic flux as shown in FIG. 87 is generated.

  When a current flows through the coil 104 and a magnetic flux is generated, the magnetic flux flows in and around the core 100 as shown in FIG. Here, FIG. 88 is an explanatory diagram for explaining the flow of magnetic flux of the power transmission side pad and the inductor coil. As a result, currents as shown in FIG. 89 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 85 flows. Therefore, the currents induced by the magnetic flux generated by the coil 104 cancel each other. Therefore, the influence of the magnetic flux generated by the coil 104 can be suppressed as much as possible.

  The inductor coil 1311 has the same configuration as the inductor coil 1110.

  Next, effects of the non-contact power feeding device according to the tenth embodiment will be described. According to the tenth embodiment, the same effect as in the first embodiment can be obtained.

(Eleventh embodiment)
Next, the non-contact power feeding device of the eleventh embodiment will be described. The contactless power supply device of the eleventh embodiment is obtained by changing only the shape and arrangement of the inductor coil with respect to the contactless power supply device of the tenth embodiment. Except for the inductor coil, the contactless power supply apparatus of the tenth embodiment is the same. Therefore, only the configuration of the inductor coil will be described with reference to FIGS. 90 to 94, and the description of the operation will be omitted. In addition, the same component as 10th Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

As shown in FIGS. 90 to 92, the inductor coil 1110 is configured and arranged by two substantially rectangular annular coils COIL1 and COIL2 as in the second embodiment. However, since the flow of magnetic flux generated by the coil 104 is different from the flow of magnetic flux generated by the coils 101 and 102 of the second embodiment, the wiring of the coils COIL1 and COIL2 is different.
Here, FIG. 92 is an explanatory view corresponding to the cross-sectional view of FIG. 21 for explaining the flow of magnetic flux in the inductor coil. The coils COIL1 and COIL2 are wired so that when the current flows through the inductor coil 1110, the current as shown in FIGS. 90 and 91 flows. In this case, a magnetic flux as shown in FIG. 92 is generated.

  When a current flows through the coil 104 and a magnetic flux is generated, the magnetic flux flows in and around the core 100 as shown in FIG. Here, FIG. 93 is an explanatory diagram for explaining the flow of magnetic flux of the power transmission side pad and the inductor coil. As a result, currents as shown in FIG. 94 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 90 flows. Therefore, the currents induced by the magnetic flux generated by the coil 104 cancel each other. Therefore, the influence of the magnetic flux generated by the coil 104 can be suppressed as much as possible.

  The inductor coil 1311 has the same configuration as the inductor coil 1110.

  Next, effects of the non-contact power feeding device according to the eleventh embodiment will be described. According to the eleventh embodiment, the same effect as in the tenth embodiment can be obtained.

(Twelfth embodiment)
Next, the non-contact electric power feeder of 12th Embodiment is demonstrated. The contactless power supply device of the twelfth embodiment is obtained by changing only the shape and arrangement of the inductor coil with respect to the contactless power supply device of the tenth embodiment. Except for the inductor coil, the contactless power supply apparatus of the tenth embodiment is the same. Therefore, only the configuration of the inductor coil will be described with reference to FIGS. 95 to 98, and the description of the operation will be omitted. In addition, the same component as 10th Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIGS. 95 and 96, the inductor coil 1110 is configured and arranged by two substantially rectangular annular coils COIL1 and COIL2 as in the third embodiment. However, since the flow of magnetic flux generated by the coil 104 is different from the flow of magnetic flux generated by the coils 101 and 102 of the third embodiment, the wiring of the coils COIL1 and COIL2 is different. Here, FIG. 96 is an explanatory view corresponding to FIG. 28 for explaining the flow of magnetic flux of the inductor coil. When a current flows through the inductor coil 1110, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 95 flows. In this case, a magnetic flux as shown in FIG. 96 is generated.

  When a current flows through the coil 104 and a magnetic flux is generated, the magnetic flux flows in and around the core 100 as shown in FIG. Here, FIG. 97 is an explanatory diagram for explaining the flow of magnetic flux in the power transmission side pad and the inductor coil. As a result, currents as shown in FIG. 98 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 95 flows. Therefore, the currents induced by the magnetic flux generated by the coil 104 cancel each other. Therefore, the influence of the magnetic flux generated by the coil 104 can be suppressed as much as possible.

  The inductor coil 1311 has the same configuration as the inductor coil 1110.

  Next, effects of the contactless power feeding device of the twelfth embodiment will be described. According to the twelfth embodiment, the same effects as in the tenth embodiment can be obtained.

(13th Embodiment)
Next, the non-contact electric power feeder of 13th Embodiment is demonstrated. The contactless power supply device of the thirteenth embodiment is obtained by changing only the shape and arrangement of the inductor coil with respect to the contactless power supply device of the tenth embodiment. Except for the inductor coil, the contactless power supply apparatus of the tenth embodiment is the same. Therefore, only the configuration of the inductor coil will be described with reference to FIGS. 99 to 105, and the description of the operation will be omitted. In addition, the same component as 10th Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIGS. 99 to 102, the inductor coil 1110 is configured and arranged by two substantially rectangular annular coils COIL1 and COIL2 as in the fourth embodiment. However, since the flow of magnetic flux generated by the coil 104 is different from the flow of magnetic flux generated by the coils 101 and 102 of the fourth embodiment, the wiring of the coils COIL1 and COIL2 is different. The coils COIL1 and COIL2 are wired so that when the current flows through the inductor coil 1110, the current as shown in FIGS. 99 and 100 flows. In this case, a magnetic flux as shown in FIGS. 101 and 102 is generated. Here, FIGS. 101 and 102 are explanatory views corresponding to the cross-sectional views taken along the arrows in FIGS. 35 and 36 for describing the flow of magnetic flux in the inductor coil.

  When a current flows through the coil 104 and a magnetic flux is generated, the magnetic flux flows in and around the core 100 as shown in FIGS. Here, FIG. 103 and FIG. 104 are explanatory diagrams for explaining the flow of magnetic flux of the power transmission side pad and the inductor coil. As a result, currents as shown in FIG. 105 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 100 flows. Therefore, the currents induced by the magnetic flux generated by the coil 104 cancel each other. Therefore, the influence of the magnetic flux generated by the coil 104 can be suppressed as much as possible.

  The inductor coil 1311 has the same configuration as the inductor coil 1110.

  Next, effects of the non-contact power feeding device according to the thirteenth embodiment will be described. According to the thirteenth embodiment, the same effect as in the tenth embodiment can be obtained.

(14th Embodiment)
Next, the non-contact electric power feeder of 14th Embodiment is demonstrated. The contactless power supply device of the fourteenth embodiment is a modification of the contactless power supply device of the tenth embodiment only in the shape and arrangement of the inductor coil. Except for the inductor coil, the contactless power supply apparatus of the tenth embodiment is the same. Therefore, only the configuration of the inductor coil will be described with reference to FIGS. 106 to 109, and the description of the operation will be omitted. In addition, the same component as 10th Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIGS. 106 and 107, the inductor coil 1110 is configured and arranged by two substantially rectangular annular coils COIL1 and COIL2 as in the eighth embodiment. However, since the flow of magnetic flux generated by the coil 104 is different from the flow of magnetic flux generated by the coils 101 and 102 of the eighth embodiment, the wiring of the coils COIL1 and COIL2 is different. Here, FIG. 107 is an explanatory view corresponding to the cross-sectional view of FIG. 70 for explaining the flow of magnetic flux of the inductor coil. When the current flows through the inductor coil 1110, the coils COIL1 and COIL2 are wired so that the current as shown in FIG. 106 flows. In this case, a magnetic flux as shown in FIG. 107 is generated.

  When a current flows through the coil 104 and a magnetic flux is generated, the magnetic flux flows in and around the core 100 as shown in FIG. Here, FIG. 108 is an explanatory diagram for explaining the flow of magnetic flux in the power transmission side pad and the inductor coil. As a result, currents as shown in FIG. 109 are induced in the coils COIL1 and COIL2. However, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 106 flows. Therefore, the currents induced by the magnetic flux generated by the coil 104 cancel each other. Therefore, the influence of the magnetic flux generated by the coil 104 can be suppressed as much as possible.

  The inductor coil 1311 has the same configuration as the inductor coil 1110.

  Next, effects of the non-contact power feeding device according to the fourteenth embodiment will be described. According to the fourteenth embodiment, the same effects as those of the first embodiment can be obtained.

(Fifteenth embodiment)
Next, the non-contact electric power feeder of 15th Embodiment is demonstrated. The contactless power supply device of the fifteenth embodiment is obtained by changing the configuration of the filter circuit and the configuration of the inductor coil in accordance with the contactless power supply device of the first embodiment. Except for the filter circuit and the inductor coil, the contactless power supply device of the first embodiment is the same. Therefore, only the configuration of the filter circuit and the configuration of the inductor coil will be described with reference to FIGS. 110 to 116, and the description of the operation will be omitted. In addition, the same component as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  As illustrated in FIG. 110, the filter circuit 111 includes inductor coils 1110 and 1112 and capacitors 1111 and 1113.

  As shown in FIGS. 111 and 112, the inductor coils 1110 and 1112 are substantially rectangular annular elements configured by winding conductive wires. Here, FIG. 112 is a cross-sectional view taken along the line OO in FIG. And it is provided in the core 100 of the power transmission side pad 10, and uses the core 100 as a magnetic path. The inductor coil 1110 is configured by substantially rectangular annular coils COIL1 and COIL2. The inductor coil 1112 is configured by substantially rectangular annular coils COIL3 and COIL4. The inductor coils 1110 and 1112 are wired so that magnetic fluxes generated when a current flows through the filter circuit 111 do not cancel each other. The coils COIL1 and COIL2 are wired so that currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. The coils COIL3 and COIL4 are also wired so that the currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. The coil COIL1 is disposed on the front surface of the core 100 with its own axial direction being the front-rear direction. The coil COIL2 is disposed on the rear surface of the core 100 in a state where its own axial direction is the front-rear direction. The coil COIL3 is disposed adjacent to the coil COIL1 on the front side of the coil COIL1 in a state where its axial direction is the front-rear direction. The coil COIL4 is disposed adjacent to the coil COIL2 on the rear side of the coil COIL2 in a state where the axial center direction thereof is the front-rear direction. When a current flows through the filter circuit 111, the coils COIL1 and COIL2 are wired so that a current as shown in FIG. 113 flows, and the coils COIL3 and COIL4 are wired. In this case, a magnetic flux as shown in FIG. 114 is generated. Here, FIG. 114 is an explanatory diagram corresponding to the cross-sectional view of FIG. 112 for explaining the flow of magnetic flux in the inductor coil. Therefore, the magnetic flux in the axial center portion 1110a of the coil COIL1 and the magnetic flux in the axial center portion 1112a of the coil COIL3 are in the same direction, and the magnetic flux in the axial center portion 1110b of the coil COIL2 and the magnetic flux in the axial center portion 1112b of the coil COIL4 In the same direction. Therefore, the magnetic flux generated by the inductor coil 1110 and the magnetic flux generated by the inductor coil 1112 do not cancel each other.

  When a current flows through the coils 101 and 102 and a magnetic flux is generated, the magnetic flux flows in and around the core 100 as shown in FIG. Here, FIG. 115 is an explanatory diagram for explaining the flow of magnetic flux of the power transmission side pad and the inductor coil. As a result, currents as shown in FIG. 116 are induced in the coils COIL1, COIL2, and the coils COIL3, COIL4. However, the coils COIL1, COIL2, and the coils COIL3, COIL4 are wired so that a current as shown in FIG. 113 flows. Therefore, the currents induced by the magnetic flux generated by the coils 101 and 102 cancel each other. Therefore, the influence of the magnetic flux generated by the coils 101 and 102 can be suppressed as much as possible.

  Next, effects of the non-contact power feeding device according to the fifteenth embodiment will be described.

  According to the fifteenth embodiment, the same effects as in the first embodiment can be obtained.

  According to the fifteenth embodiment, two inductor coils 1110 and 1112 are provided in one core 100. Therefore, the non-contact power feeding device 1 can be further downsized as compared with the case where two inductor coils having a core are separately provided.

  According to the fifteenth embodiment, the inductor coils 1110 and 1112 are arranged adjacent to each other. Therefore, the situation where the physique of the core 100 becomes large can be suppressed.

  According to the fifteenth embodiment, the inductor coils 1110 and 1112 are wired so that magnetic fluxes generated when a current flows through the filter circuit 111 do not cancel each other. Therefore, the characteristics of the filter circuit 111 can be ensured.

  In the first to fifteenth embodiments, the inductor coil of the filter circuit on the power transmission circuit side uses the core of the power transmission side pad as a magnetic path, and the inductor coil of the filter circuit on the power reception circuit side magnetizes the core of the power reception side pad. Although the example used as a road is given, it is not limited to this. The inductor coil of at least one of the filter circuits may use the core of the pad to which the filter circuit is connected as the magnetic path.

  In the first to fifteenth embodiments, an example in which the inductor coil is configured by two coils is given, but the present invention is not limited to this. The inductor coil may be composed of three or more coils. It suffices that the wirings are arranged so that the currents induced by the magnetic flux generated by the coil of the power transmission side pad cancel each other.

  In the first to fifteenth embodiments, the example is described in which the resonance capacitor is connected in parallel to the power transmission side pad and the power reception side pad, but the present invention is not limited to this. The resonance capacitor may be connected in series to the power transmission side pad and the power reception side pad, respectively.

  In the first to fifteenth embodiments, the filter circuit is configured by an inductor coil and a capacitor connected in series. However, the present invention is not limited to this. The filter circuit may have other configurations. What is necessary is just to have an inductor coil.

  In the first to fifteenth embodiments, the coils of the power transmission side pad, the power reception side pad, and the inductor coil have a substantially rectangular ring shape, but the present invention is not limited to this. The coil of the power transmission side pad, the power reception side pad, and the inductor coil may be annular or semi-annular. Any ring shape may be used.

  In the first to fifteenth embodiments, an example in which the core has a rectangular parallelepiped shape is given, but the present invention is not limited to this. The core may be cylindrical. Any shape that can form a magnetic path may be used. You may make it the axial center part of a coil be comprised with the magnetic material of a core.

  In the first to fifteenth embodiments, an example is described in which the core is formed of a ferrite or a dust core, but the present invention is not limited to this. You may be comprised by laminating a silicon steel plate or plate-shaped amorphous in the thickness direction. In that case, the core may be embedded so that the magnetic flux generated by the inductor coil is orthogonal to the stacking direction. As shown in FIG. 117, a core 100 is formed by laminating plate-like magnetic materials 100a in the thickness direction, and only a portion that generates a magnetic flux perpendicular to the laminating direction when current flows through the inductor coil 1110 is the core. A portion that is embedded in 100 and generates a magnetic flux in the stacking direction may be disposed outside the core 100.

  In 3rd Embodiment, although the coils COIL1 and COIL2 which comprise the inductor coil 1110 are the same shapes as the coils 101 and 102 of the power transmission side pad 10, the example arrange | positioned just under the coils 101 and 102 is given. It is not limited to this. The coils COIL1, COIL2 constituting the inductor coil 1110 may have a shape different from that of the coils 101, 102 of the power transmission side pad 10. Further, it may be arranged immediately above the coils 101 and 102 of the power transmission side pad 10 or may be arranged on the lower surface of the core 100.

  In the seventh embodiment, the coils COIL1 and COIL2 constituting the inductor coil 1110 have their axial directions in the front-rear direction, and in the eighth embodiment, the coils COIL1 and COIL2 constituting the inductor coil 1110 are their own axes. Although the example which is embed | buried under the core 100 in the state which made the heart direction the up-down direction is given, it is not restricted to this. It may be embedded in the core 100 with its own axial direction being the left-right direction.

  In the ninth embodiment, an example in which the configuration of the inductor coil is the same as that of the first embodiment is given, but the present invention is not limited to this. The configuration of the inductor coil may be the same as in the second to eighth embodiments. The same effects as those of the second to fourth embodiments can be obtained by combining with any configuration.

  In 10th-14th embodiment, although the example which combined the inductor coil of various structures was given to the power transmission side pad 10 provided with the coil 104, it is not restricted to this. The configuration of the inductor coil may be the same as in the fifth and seventh embodiments. The same effects as those of the fifth and seventh embodiments can be obtained by combining with any configuration.

  In the fifteenth embodiment, an example in which the two inductor coils 1110 and 1112 are provided in the core 100 is described, but the present invention is not limited to this. Three or more inductor coils may be provided in the core.

  In the fifteenth embodiment, an example in which inductor coils 1110 and 1112 are adjacently embedded in the core 100 and wired so that magnetic fluxes generated when a current flows through the filter circuit 111 does not cancel each other is given. However, it is not limited to this. Depending on the configuration of the filter circuit, when current flows through the filter circuit, wiring may be possible only so that magnetic fluxes generated by a plurality of inductor coils constituting the filter circuit cancel each other. In that case, a plurality of inductor coils may be arranged apart from each other. The situation where magnetic fluxes cancel each other can be suppressed as much as possible.

DESCRIPTION OF SYMBOLS 1 ... Non-contact electric power feeder, 10 ... Power transmission side pad (power feeding pad), 100 ... Core (core for electric power feeding), 101, 102 ... Coil (coil for electric power feeding), 11 ... Power transmission Circuit 110 110 Power conversion circuit 111 Filter circuit 1110 Inductor coil COIL1, COIL2 Coil 1111 Capacitor 112 Resonance capacitor

Claims (6)

A power supply pad (10) having a power supply core (100) made of a magnetic material and a power supply coil (101, 102, 103, 104) provided on the power supply core and using the power supply core as a magnetic path; ,
A filter circuit (111) having an inductor coil and connected to the power supply pad;
In the non-contact power supply device that supplies the power supply pads from one power supply pad to the other power supply pad in a non-contact manner, the power supply pads connected to the filter circuit are opposed to each other,
The inductor coil (1110, 1112) of at least one of the filter circuits includes a plurality of coils (COIL1, COIL2, COIL3, COIL4), and currents induced by the magnetic flux generated by the power feeding coil cancel each other. The non-contact power feeding, wherein the plurality of coils are wired so as to fit, provided in the power feeding core of the power feeding pad to which the filter circuit is connected, and the power feeding core is used as a magnetic path apparatus.   The contactless power supply device according to claim 1, wherein the inductor coil provided in the power supply core is embedded in the power supply core.   The contactless power supply device according to claim 1, wherein the inductor coil provided in the power supply core is provided on a surface of the power supply core.   The contactless power feeding device according to claim 1, wherein a plurality of the inductor coils are provided in one power feeding core.   The non-contact power feeding device according to claim 4, wherein the plurality of inductor coils provided in one power feeding core are arranged adjacent to each other.   The plurality of inductor coils provided in one power feeding core are wired so that magnetic fluxes generated when a current flows through the filter circuit do not cancel each other. 5. A non-contact power feeding device according to 5.