Power transmission device

Abstract

To perform a control of a power transmission optimal for each power reception device even for the power reception device of different types.SOLUTION: An in-vehicle device 10 includes: a vehicle-side coil 11; a first power conversion circuit 13 that generates a supply power to be supplied to the vehicle-side coil 11 using a power of a secondary battery 17; and a vehicle-side control part 20 that is configured to be capable of acquiring a terminal voltage Vc of a capacitor 34 charged by the power received by a power supply device 30 and capable of controlling the first power conversion circuit 13, and is capable of executing a power supply control that controls the supply power via the first power conversion circuit 13 so that the terminal voltage Vc becomes a target voltage. The power supply control includes a phase compensation, and the vehicle-side control part 20 acquires type information indicating the type of the power supply device 30 of a power transmission destination, acquires setting information corresponding to the power supply device 30 of the power transmission destination based on the type information from a storage part 51 that stores the setting information necessary for the phase compensation for each type of the power supply device 30, and performs the phase compensation based on the setting information.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The technology of the present disclosure relates to a power transmitting device. [Background technology]

[0002] In recent years, research and development has been conducted into charging mobility vehicles equipped with secondary batteries that contribute to energy efficiency, in order to ensure that more people have access to affordable, reliable, sustainable, and advanced energy.

[0003] For example, research and development into charging and power supply is being conducted on contactless power transmission, which transmits power between two devices without contact.

[0004] Patent Document 1 describes a power receiving device that receives power transferred from a power transmitting device in a non-contact manner by electromagnetic resonance.

[0005] Patent Document 2 describes a mobile object that can receive power from an externally provided power transmission device in a non-contact manner.

[0006] Patent Document 3 describes a wireless charging receiving end that includes a receiver coil, a compensation network, a power converter, and a receiving end controller.

[0007] Patent Document 4 describes a contactless power supply device including a power supply device that includes an inverter, a primary coil, and a power supply side resonant circuit provided between the inverter and the primary coil, and a power receiving device that includes a secondary coil that is magnetically coupled to the primary coil and acquires energy from the primary coil, and converts the energy acquired by the secondary coil into voltage to generate output power. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-005615 [Patent Document 2] Japanese Patent Publication No. 2023-20323 [Patent Document 3] Special Publication No. 2023-500133 [Patent Document 4] International Publication No. 2015 / 104779 Summary of the Invention [Problem to be solved by the invention]

[0009] The technology disclosed herein aims to perform optimal power transmission control for each power receiving device, even if the power receiving devices are of different types. [Means for solving the problem]

[0010] A power transmission device according to one embodiment of the present disclosure comprises a power transmission unit that transmits power to a power receiving device via contactless power transmission; a power conversion unit that generates supply power to be supplied to the power transmission unit using power from a first power supply unit and supplies the supply power to the power transmission unit; and a control unit that is configured to acquire the terminal voltage of a second power supply unit that is charged by the power received by the power receiving device and to be able to control the power conversion unit, and that is capable of performing power supply control that controls the supply power via the power conversion unit so that the terminal voltage becomes a target voltage, wherein the power supply control includes phase compensation that adjusts the phase characteristics of a system that charges the second power supply unit, and the control unit acquires type information indicating the type of the power receiving device to which power is to be transmitted, and acquires control information corresponding to the power receiving device to which power is to be transmitted based on the type information from a memory unit that stores control information necessary for the phase compensation for each type of power receiving device, and performs the phase compensation based on the acquired control information. [Effects of the Invention]

[0011] According to the technology of the present disclosure, even if the types of power receiving devices are different, it is possible to perform optimal power transmission control for each power receiving device. [Brief explanation of the drawings]

[0012] [Figure 1]FIG. 1 is a schematic diagram showing a contactless power transmission system 100 according to an embodiment of the disclosed technique. [Figure 2] FIG. 2 is a schematic diagram illustrating the operating state of the contactless power transfer system 100 while the in-vehicle device 10 is executing power supply control. [Figure 3] FIG. 3 is a schematic diagram showing an example of information stored in the storage unit 51 of the server 50 and used during the first power transmission. [Figure 4] FIG. 4 is a schematic diagram illustrating the operating state of the contactless power transfer system 100 before the start of power supply control. [Figure 5] FIG. 5 is a schematic diagram showing the configuration of the contactless power transfer system 100 when the second power transfer is performed. [Figure 6] FIG. 6 is a schematic diagram showing an example of information stored in the storage unit 51 of the server 50 and used during the second power transmission. DETAILED DESCRIPTION OF THE INVENTION

[0013] 1 is a schematic diagram showing a contactless power transfer system 100 according to an embodiment of the technology of the present disclosure. The contactless power transfer system 100 includes an on-board device 10 mounted on a vehicle or the like, a power supply device 30 provided in a location where a vehicle including the on-board device 10 can be parked (a parking lot, a commercial facility, a home, or the like), and a server 50 connected to a network 60 such as the Internet. The server 50 is provided with a storage unit 51 including a storage medium such as a semiconductor memory or a hard disk. The on-board device 10 is connectable to the network 60 and is configured to be able to communicate with the server 50 via the network 60.

[0014] The contactless power transfer system 100 is configured to enable a first power transfer from the in-vehicle device 10 to the power supply device 30 and a second power transfer from the power supply device 30 to the in-vehicle device 10. The in-vehicle device 10 and the power supply device 30 transfer power contactlessly using magnetic coupling between coils, for example, using a magnetic field resonance method or an electromagnetic induction method. During the first power transfer, the in-vehicle device 10 constitutes the power transmitting device, and the power supply device 30 constitutes the power receiving device. During the second power transfer, the in-vehicle device 10 constitutes the power receiving device, and the power supply device 30 constitutes the power transmitting device.

[0015] The vehicle on which the in-vehicle device 10 is mounted includes a secondary battery 17 (denoted as BAT in the drawing) such as a lithium ion battery or a nickel-metal hydride battery, and an electric motor as a drive source that is driven using the power of the secondary battery 17. This vehicle is, for example, an automobile having drive wheels driven by the power of the electric motor and wheels including steerable wheels (neither of which is shown).

[0016] The vehicle-mounted device 10 includes a vehicle-side coil 11, a resonant circuit 12 connected to the vehicle-side coil 11, a first power conversion circuit 13 connected to the resonant circuit 12, a filter 14 provided between the first power conversion circuit 13 and a secondary battery 17, a voltage detection circuit 15 that detects the terminal voltage Vb of the secondary battery 17, a first communication unit 18, and a vehicle-side control unit 20.

[0017] The resonant circuit 12 includes, for example, a capacitor connected in series to the vehicle-side coil 11. During the first power transmission, the vehicle-side coil 11 and the resonant circuit 12 form a power transmission unit that transmits power to the power supply device 30 by contactless power transmission.

[0018] During the first power transmission, the first power conversion circuit 13 uses power from the secondary battery 17 to generate supply power to be supplied to the vehicle-side coil 11 and the resonant circuit 12, and supplies this supply power to the vehicle-side coil 11 and the resonant circuit 12. The first power conversion circuit 13 includes switching elements such as transistors, and during the first power transmission, it operates, for example, as an inverter that converts direct current supplied from the secondary battery 17 into high-frequency alternating current. The high-frequency alternating current converted by the first power conversion circuit 13 is input to the vehicle-side coil 11, and high-frequency alternating current is induced by electromagnetic induction in the power supply-side coil 31 of the power supply device 30 that faces the vehicle-side coil 11 with a gap therebetween.

[0019] A filter 14 is provided to stabilize the power and remove noise.

[0020] The first communication unit 18 is an interface for performing short-distance wireless communication, which can be achieved using, for example, Wi-Fi (registered trademark) or Bluetooth (registered trademark).

[0021] The vehicle-side control unit 20 includes a processor such as a CPU (Central Processing Unit) and a memory, and performs various controls related to power transmission.

[0022] The power supply device 30 includes a power supply side coil 31, a resonant circuit 32 connected to the power supply side coil 31, a second power conversion circuit 33 connected to the resonant circuit 32, a capacitor 34 connected to the second power conversion circuit 33, a voltage detection circuit 35 that detects the terminal voltage Vc of the capacitor 34, a third power conversion circuit 36 ​​connected to the capacitor 34, a second communication unit 37, and a power supply side control unit 40.

[0023] The resonant circuit 32 includes, for example, a capacitor connected in series to the power supply side coil 31. During the first power transmission, the power supply side coil 31 and the resonant circuit 32 form a power receiving unit that receives power transmitted from the in-vehicle device 10 by contactless power transmission.

[0024] The second power conversion circuit 33 operates as a rectifier during the first power transmission, and converts the high-frequency AC input from the power supply side coil 31 into DC.

[0025] The capacitor 34 is charged by the direct current converted by the second power conversion circuit 33. During the first power transmission, the capacitor 34 is configured to be able to supply the stored power to a load connected to the third power conversion circuit 36.

[0026] The third power conversion circuit 36 ​​operates as an inverter during the first power transmission, converting the DC discharged from the capacitor 34 into AC at the frequency of the commercial power supply. The AC at the commercial frequency converted by the third power conversion circuit 36 ​​is supplied to a power distribution network or a load such as a home appliance.

[0027] The second communication unit 37 is an interface for performing short-distance wireless communication, which can be achieved using, for example, Wi-Fi (registered trademark) or Bluetooth (registered trademark).

[0028] The power supply side control unit 40 includes a processor such as a CPU (Central Processing Unit) and a memory, and performs overall control of the power supply device 30.

[0029] During the second power transmission from the power supply device 30 to the in-vehicle device 10, the third power conversion circuit 36 ​​in the power supply device 30 is replaced with a power factor correction circuit. The second power conversion circuit 33 operates as an inverter and converts the AC input from the power factor correction circuit into high-frequency AC suitable for power transmission. The high-frequency AC converted by the second power conversion circuit 33 is input to the power supply side coil 31. This induces high-frequency AC in the vehicle side coil 11 by electromagnetic induction. The first power conversion circuit 13 of the in-vehicle device 10 operates as a rectifier during the second power transmission and converts the high-frequency AC input from the vehicle side coil 11 into DC. The converted DC is supplied to the secondary battery 17 and stored.

[0030] During the first power transmission, the vehicle-side control unit 20 acquires the terminal voltage Vc of the capacitor 34 of the power supply device 30, and performs power supply control to control the supply power supplied to the vehicle-side coil 11 and the resonant circuit 12 via the first power conversion circuit 13 so that this terminal voltage Vc becomes a predetermined target voltage.

[0031] In this way, during the first power transmission, the vehicle-side control unit 20 controls (feedback control) the input power of the control object, which is a system that charges the capacitor 34 with power transmitted from the in-vehicle device 10 (a charging system including the resonant circuit 12, the vehicle-side coil 11, the power supply-side coil 31, the resonant circuit 32, and the second power conversion circuit 33, which are provided between the first power conversion circuit 13 and the capacitor 34). The output voltage (synonymous with the terminal voltage Vc) of the control object is set to a target voltage. Hereinafter, the transfer function of the control object will be referred to as transfer function G(s).

[0032] 2 is a schematic diagram illustrating the operating state of the contactless power transfer system 100 while the in-vehicle device 10 is performing power supply control. When the power supply control is started, the power supply-side control unit 40 acquires the terminal voltage Vc from the voltage detection circuit 35 and performs control to transmit the acquired terminal voltage Vc from the second communication unit 37 to the in-vehicle device 10. The terminal voltage Vc transmitted from the second communication unit 37 is received by the first communication unit 18 and acquired by the vehicle-side control unit 20.

[0033] 2, the vehicle-side control unit 20 includes a comparator 21, a compensator 22, a pulse generating unit 23, and a compensator setting unit 24. These are configured by hardware, software, or a combination thereof. The comparator 21 compares the terminal voltage Vc acquired via the first communication unit 18 with a target voltage, and outputs the deviation.

[0034] The compensator 22 determines the input power to the controlled object required to optimize the output of the controlled object represented by the transfer function G(s) (to achieve a state with good responsiveness and no oscillation) based on the deviation input from the comparator 21 and various setting values ​​for phase compensation set by the compensator setting unit 24 (for example, information on the P term, I term, and D term in the case of a PID compensator).

[0035] Specifically, compensator 22 performs phase compensation to adjust the phase characteristics of the controlled object, and determines the input power to the controlled object so that the phase margin between the input and output of the controlled object is 0 degrees or more. Pulse generator 23 generates a drive pulse and supplies it to first power converter circuit 13 so that the power output from first power converter circuit 13 becomes the input power determined by compensator 22.

[0036] The compensator setting unit 24 acquires the setting value of the compensator 22 such that the phase margin between the input and output of the controlled object is 0 degrees or more, and sets the acquired setting value in the compensator 22. If the values ​​(frequencies) of the poles and zeros in the transfer function G(s) are determined, the setting value of the compensator 22 such that the phase margin between the input and output of the controlled object is 0 degrees or more can be determined based on those values. The values ​​of the poles and zeros of the transfer function G(s) constitute one piece of transfer function information related to the transfer function G(s).

[0037] The transfer function G(s) can vary depending on the combination of the in-vehicle device 10 and the power supply device 30. For example, consider a case where there is a specific type of in-vehicle device 10, and this in-vehicle device 10 transmits power to each of a plurality of different types of power supply devices 30. In this case, it is necessary to set the compensator 22 of the in-vehicle device 10 differently for each type of power supply device 30.

[0038] In this embodiment, for each combination of the in-vehicle device 10 and each type of power supply device 30, information on the transfer function G(s) of the control object determined by that combination and information on the setting value of the compensator 22 corresponding to that transfer function G(s) (hereinafter also referred to as setting information) are stored in advance in the storage unit 51 of the server 50.

[0039] 3 is a schematic diagram showing an example of information stored in the storage unit 51 of the server 50 and used during the first power transmission. The storage unit 51 stores, for each type of power supply device (three types in the example shown), information on the number of poles and zeros and frequency of the transfer function G(s), information on the gain of the transfer function G(s) (DC gain), and other information (other) as transfer function information. A company A's XX type power supply device 30 shows an example in which the transfer function G(s) changes depending on the output current value of the controlled object. In this power supply device 30, information on the number of poles and zeros and frequency, and gain information are stored for each output current value.

[0040] In the example shown in the figure, the storage unit 51 stores setting information indicating the optimal setting value of the compensator 22 determined by each of four pieces of transfer function information. In the example shown in the figure, the setting information indicates the setting mode of the compensator 22 and information on the setting values ​​of the compensator 22 in that setting mode (P term, I term, D term). The transfer function information shown in FIG. 3 is uploaded to the server 50 by, for example, the supplier of the power supply device 30. The setting information shown in FIG. 3 is uploaded to the server 50 by, for example, the supplier of the in-vehicle device 10.

[0041] 4 is a schematic diagram illustrating the operating state of the contactless power transfer system 100 before the start of power supply control. Before the above-described power supply control is executed, i.e., before the comparator 21 and the compensator 22 determine the power to be supplied to the vehicle-side coil 11 and the resonant circuit 12, the vehicle-side control unit 20 requests the power supply unit 30 to transmit type information of the power supply unit 30. Upon receiving this request, the power supply control unit 40 transmits the type information of its own device to the in-vehicle device 10 via the second communication unit 37.

[0042] When the vehicle-side control unit 20 acquires the type information from the power supply device 30 via the first communication unit 18, it transmits the type information to the server 50 via the network 60 and requests the server 50 to transmit setting information corresponding to the type information. Upon receiving this request, the server 50 reads out the setting information corresponding to the type information received from the in-vehicle device 10 from the storage unit 51 and transmits it to the in-vehicle device 10.

[0043] When the vehicle-side control unit 20 acquires the setting information from the server 50, it inputs the setting information to the compensator setting unit 24. The compensator setting unit 24 sets the compensator 22 based on the input setting information. In the data example shown in FIG. 3, the setting information is the information itself about the setting value of the compensator 22, so the compensator setting unit 24 sets the setting information directly in the compensator 22. When the vehicle-side control unit 20 finishes setting the setting value of the compensator 22, it starts the above-mentioned power supply control.

[0044] As described above, according to the contactless power transmission system 100, before starting power supply control, the server 50 transmits to the in-vehicle device 10 setting information for performing phase compensation according to the transfer function G(s) determined by the combination of the power supply device 30 and the in-vehicle device 10. The in-vehicle device 10 then controls the supply power during power supply control based on this setting information. Therefore, even when various types of power supply devices 30 are combined with the in-vehicle device 10, optimal power transmission control according to the combination with the power supply device 30 becomes possible.

[0045] 3 may be stored in the storage unit 51. In this case, the vehicle-side control unit 20 acquires transfer function information corresponding to the type information of the power supply device 30 to which power is to be transmitted from the server 50. The compensator setting unit 24 then generates information on the setting value of the compensator 22 based on the acquired transfer function information, and sets the generated setting value in the compensator 22. This reduces the capacity of the storage unit 51 and makes it easier to generate information to be stored in the storage unit 51, thereby reducing the cost of building the system.

[0046] 5 is a schematic diagram showing the configuration of the contactless power transmission system 100 when the second power transmission is performed. In the example of FIG. 5, the power supply device 30 is configured to be connectable to a network 60 and to be able to communicate with a server 50.

[0047] When the second power transmission is performed, AC is supplied to the second power conversion circuit 33 from a power distribution network, a commercial power source, or the like via a power factor correction circuit 36A instead of the third power conversion circuit 36. The second power conversion circuit 33 converts the AC input from the power factor correction circuit 36A into high-frequency AC. The power supply-side control unit 40 includes a comparator 41, a compensator 42, a pulse generation unit 43, and a compensator setting unit 44, which correspond to the comparator 21, the compensator 22, the pulse generation unit 23, and the compensator setting unit 24 in the vehicle-side control unit 20, respectively.

[0048] During the second power transmission, the power supply side control unit 40 acquires the terminal voltage Vb of the secondary battery 17 from the in-vehicle device 10, and performs power supply control to control the supply power supplied to the power supply side coil 31 and the resonant circuit 32 via the second power conversion circuit 33 so that this terminal voltage Vb becomes a predetermined target voltage.

[0049] In this way, during the second power transmission, the power supply side control unit 40 controls the system that charges the secondary battery 17 with power transmitted to the in-vehicle device 10 from a power distribution network or a commercial power source, etc., as the control object, and controls the input power of this control object so that the output voltage (synonymous with the terminal voltage Vb) of this control object becomes the target voltage.

[0050] When power supply control by the power supply-side control unit 40 is started, the vehicle-side control unit 20 acquires the terminal voltage Vb from the voltage detection circuit 15 and performs control to transmit the acquired terminal voltage Vb from the first communication unit 18 to the power supply device 30. The terminal voltage Vb transmitted from the first communication unit 18 is received by the second communication unit 37 and acquired by the power supply-side control unit 40.

[0051] The comparator 41 compares the terminal voltage Vb acquired via the second communication unit 37 with the target voltage, and outputs the deviation.

[0052] The compensator 42 determines the input power to the controlled object required to optimize the output of the controlled object based on the deviation input from the comparator 41 and various setting values ​​for phase compensation set by the compensator setting unit 44.

[0053] Specifically, the compensator 42 performs phase compensation to adjust the phase characteristics of the controlled object, and determines the input power to the controlled object so that the phase margin between the input and output of the controlled object is 0 degrees or more. The pulse generator 43 generates a drive pulse and supplies it to the second power conversion circuit 33 so that the power output from the second power conversion circuit 33 becomes the input power determined by the compensator 42.

[0054] The compensator setting unit 44 acquires a setting value for the compensator 42 that makes the phase margin between the input and output of the controlled object equal to or greater than 0 degrees, and sets the acquired setting value in the compensator 42 .

[0055] 6 is a schematic diagram showing an example of information stored in the storage unit 51 of the server 50 and used during the second power transmission. The storage unit 51 stores, for each type of in-vehicle device (three types in the example shown), information on the number of poles and zeros and frequency of the transfer function G(s), information on the gain of the transfer function G(s) (DC gain), and other information (other) as transfer function information. The in-vehicle device 10 of Company A's XX model shows an example in which the transfer function G(s) changes depending on the output current value of the controlled object. In this in-vehicle device 10, information on the number of poles and zeros and frequency, and gain information are stored for each output current value.

[0056] In the example shown in the figure, the storage unit 51 stores setting information indicating the optimal setting value of the compensator 42 determined by each of four pieces of transfer function information. In the example shown in the figure, the setting information indicates the setting mode of the compensator 42 and information on the setting values ​​of the compensator 42 in that setting mode (P term, I term, D term). The transfer function information shown in FIG. 6 is uploaded to the server 50 by, for example, the supplier of the in-vehicle device 10. The setting information shown in FIG. 6 is uploaded to the server 50 by, for example, the supplier of the power supply device 30.

[0057] Before executing power supply control, the power supply-side control unit 40 requests the in-vehicle device 10 to transmit type information of the in-vehicle device 10. Upon receiving this request, the vehicle-side control unit 20 transmits the type information of its own device to the power supply device 30 via the first communication unit 18.

[0058] When the power supply side control unit 40 acquires the type information from the in-vehicle device 10 via the second communication unit 37, it transmits this type information to the server 50 via the network 60 and requests the server 50 to transmit setting information corresponding to this type information. Upon receiving this request, the server 50 reads out from the storage unit 51 the setting information corresponding to the type information received from the power supply device 30 and transmits it to the power supply device 30.

[0059] When the power supply side control unit 40 acquires the setting information from the server 50, it inputs the setting information to the compensator setting unit 44. The compensator setting unit 44 sets the compensator 42 based on the input setting information. In the example of FIG. 6, the setting information is information on the setting value of the compensator 42 itself, so the compensator setting unit 44 sets the setting information directly in the compensator 42. When the power supply side control unit 40 has finished setting the setting value of the compensator 42, it starts the above-mentioned power supply control.

[0060] 6 may be stored in the storage unit 51 during the second power transmission. In this case, the power supply side control unit 40 acquires transfer function information corresponding to the type information of the in-vehicle device 10 to which power is to be transmitted from the server 50. Then, the compensator setting unit 44 generates information on the setting value of the compensator 42 based on the acquired transfer function information, and sets the generated setting value in the compensator 42.

[0061] This specification describes at least the following items. Note that the components in parentheses correspond to those in the above-described embodiment, but are not limited to these.

[0062] (1) a power transmission unit (a vehicle-side coil 11 and a resonant circuit 12, or a power supply-side coil 31 and a resonant circuit 32) that transmits power to a power receiving device (a power supply device 30 or an in-vehicle device 10) by contactless power transmission; a power conversion unit (first power conversion circuit 13 or second power conversion circuit 33) that generates supply power to be supplied to the power transmission unit using power from a first power supply unit (secondary battery 17 or commercial power supply) and supplies the supply power to the power transmission unit; a control unit (vehicle-side control unit 20 or power-source-side control unit 40) configured to acquire a terminal voltage (terminal voltage Vc or terminal voltage Vb) of a second power supply unit (capacitor 34 or secondary battery 17) that is charged by the power received by the power receiving device and to control the power conversion unit, and to execute power supply control to control the supplied power via the power conversion unit so that the terminal voltage becomes a target voltage; Equipped with The control unit acquire type information indicating the type of the power receiving device to which the power is to be transmitted; obtains control information corresponding to the power receiving device of the power transmission destination based on the type information from a storage unit (storage unit 51) that stores control information (either setting information or transfer function information) necessary for the phase compensation for each type of power receiving device; performing the phase compensation based on the acquired control information; Power transmission device (vehicle-mounted device 10 or power supply device 30).

[0063] According to (1), appropriate phase compensation can be performed for each type of power receiving device, which enables optimal power transmission control between power receiving devices with various circuit configurations.

[0064] (2) The power transmission device according to (1), configured to be able to communicate with a server (server 50) via a network (network 60); The storage unit is provided in the server. Power transmission equipment.

[0065] According to (2), by using the control information stored in the memory unit of the server, it is not necessary to apply a design for optimal phase compensation for each different type of power receiving device to the power transmitting device, thereby reducing the cost of the power transmitting device. Also, since the control information is stored in the server, it is possible to continue updating the optimal phase compensation setting for new types of power receiving devices without changing the software of the power transmitting device. Furthermore, even if the power transmitting device is damaged, the control information stored in the memory unit can be easily checked, making it possible to understand what kind of power supply control was performed.

[0066] (3) The power transmitting device according to (2), The control unit includes a compensator (compensator 22 or compensator 42) that performs the phase compensation, The control information is information indicating a setting value of the compensator. Power transmission equipment.

[0067] According to (3), it is only necessary to obtain the setting value of the compensator from the server and set it in the compensator, which reduces the cost and processing load of the power transmitting device.

[0068] (4) The power transmitting device according to (2), The control unit includes a compensator (compensator 22 or compensator 42) that performs the phase compensation, the control information is transfer function information relating to a transfer function of the system; the control unit generates information indicating a setting value of the compensator based on the acquired transfer function information. Power transmission equipment.

[0069] According to (4), the storage unit can be simplified, and the system construction costs can be reduced.

[0070] (5) (4) The power transmitting device according to the present invention, the transfer function information includes information indicating poles and zeros of the transfer function; Power transmission equipment.

[0071] According to (5), the storage unit can be simplified, and the system construction cost can be reduced.

[0072] (6) The power transmitting device according to any one of (1) to (5), The vehicle is provided with an electric motor as a drive source driven by the electric power of the first power supply unit. Power transmission device (vehicle-mounted device 10).

[0073] According to (6), power can be sent from the vehicle to a load connected to the power receiving device, making it possible to effectively utilize the vehicle's surplus power and to utilize vehicle power in the event of a disaster.

[0074] (7) The power transmitting device according to any one of (1) to (5), The vehicle is provided in a location where it can be parked, the vehicle including the power receiving device and an electric motor as a drive source driven by the electric power of the second power supply unit. Power transmission device (power supply device 30).

[0075] According to (7), the second power supply unit of the vehicle can be appropriately charged. [Explanation of symbols]

[0076] 10 Onboard equipment 11 Vehicle side coil 12,32 resonant circuit 13 First power conversion circuit 14 Filters 15 Voltage detection circuit 17 Secondary battery 18 First Communications Department 20 Vehicle side control unit 21 Comparator 22 Compensator 23 Pulse generation unit 24 Compensator setting section 30 Power supply 31 Power supply coil 33 Second power conversion circuit 34 Capacitor 35 Voltage detection circuit 36 Third power conversion circuit 37 Second Communications Department 40 Power supply side control unit 50 servers 51 Storage section 60 Network 100 Contactless power transmission system

Claims

1. a power transmission unit that transmits power to the power receiving device by contactless power transmission; a power conversion unit that generates supply power to be supplied to the power transmission unit using power from a first power supply unit and supplies the supply power to the power transmission unit; a control unit configured to acquire a terminal voltage of a second power supply unit that is charged by the power received by the power receiving device and to control the power conversion unit, and to execute power supply control that controls the supplied power via the power conversion unit so that the terminal voltage becomes a target voltage; Equipped with the power supply control includes phase compensation for adjusting a phase characteristic of a system that charges the second power supply unit, The control unit acquire type information indicating the type of the power receiving device to which the power is to be transmitted; acquiring control information corresponding to the power receiving device of the power transmission destination based on the type information from a storage unit that stores control information necessary for the phase compensation for each type of power receiving device; performing the phase compensation based on the acquired control information; Power transmission equipment.

2. The power transmitting device according to claim 1 , configured to be able to communicate with a server via a network, The storage unit is provided in the server. Power transmission equipment.

3. The power transmitting device according to claim 2, the control unit includes a compensator that performs the phase compensation, the control information is information indicating a setting value of the compensator. Power transmission equipment.

4. The power transmitting device according to claim 2, the control unit includes a compensator that performs the phase compensation, the control information is transfer function information relating to a transfer function of the system; the control unit generates information indicating a setting value of the compensator based on the acquired transfer function information. Power transmission equipment.

5. The power transmitting device according to claim 4, The transfer function information includes information indicating poles and zeros of the transfer function. Power transmission equipment.

6. The power transmitting device according to any one of claims 1 to 5, The vehicle is provided with an electric motor as a drive source driven by the electric power of the first power supply unit. Power transmission equipment.

7. The power transmitting device according to any one of claims 1 to 5, The vehicle is provided in a location where it can be parked. The vehicle includes the power receiving device and an electric motor as a drive source driven by the electric power of the second power supply unit. Power transmission equipment.

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