Power transmission device

Abstract

Provided is a power transmission device capable of performing optimal power transmission control for each of power receiving devices, even for different types of power receiving devices. An in-vehicle device is provided with: a vehicle-side coil; a first power conversion circuit that generates supply power to be supplied to the vehicle-side coil using the power of the secondary battery; and a vehicle-side control unit configured so as to be able to acquire a terminal voltage of the capacitor charged by the power received by the power supply device, to be able to control the first power conversion circuit, and to be able to execute power supply control for controlling the supplied power via the first power conversion circuit so that the terminal voltage becomes a target voltage. The power supply control includes phase compensation, and the vehicle-side control unit acquires type information indicating the type of the power supply device of the power transmission destination, acquires setting information corresponding to the power supply device of the power transmission destination from the storage unit on the basis of the type information, and performs phase compensation on the basis of the acquired setting information. The storage unit stores setting information required for phase compensation in accordance with the type of the power supply device.

Description

Technical Field

[0001] The technology disclosed herein relates to a power transmission device. Background Art

[0002] In recent years, research and development related to charging and powering mobile devices equipped with secondary batteries that contribute to improved energy efficiency has been conducted to ensure that more people have access to affordable, reliable, and sustainable advanced energy.

[0003] For example, as research and development related to charging and power supply, research and development related to contactless power transmission for transmitting power contactlessly between two devices has been conducted.

[0004] Patent Document 1 describes a power receiving device for contactlessly receiving electric power transmitted from a power transmitting device by electromagnetic resonance.

[0005] Patent Document 2 describes a movable object capable of receiving power from an externally installed power transmission device in a contactless manner.

[0006] Patent Document 3 describes a wireless charging receiving end, which 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 comprising: a power supply device including an inverter, a primary coil, and a power supply-side resonant circuit arranged between the inverter and the primary coil; and a power receiving device including a secondary coil that is magnetically coupled to the primary coil and receives energy from the primary coil, and converts the energy received by the secondary coil into voltage to generate output power.

[0008] Prior art literature

[0009] Patent Literature

[0010] Patent Document 1: Japanese Patent Application Laid-Open No. 2013-005615

[0011] Patent Document 2: Japanese Patent Application Laid-Open No. 2023-20323

[0012] Patent Document 3: Japanese Patent Application No. 2023-500133

[0013] Patent Document 4: International Publication No. 2015 / 104779 Summary of the Invention

[0014] Problems to be solved by the invention

[0015] An object of the technology disclosed herein is to enable optimal power transmission control for each power receiving device even when the devices are of different types.

[0016] Means for solving problems

[0017] A power transmitting device according to one aspect of the present disclosure includes: a power transmitting unit that transmits power to a power receiving device via contactless power transmission; a power conversion unit that generates power to be supplied to the power transmitting unit using power from a first power supply unit and supplies the power to the power transmitting unit; and a control unit configured to obtain a terminal voltage of a second power supply unit charged with power received by the power receiving device, control the power conversion unit, and execute power supply control for controlling the supplied power via the power conversion unit so that the terminal voltage reaches a target voltage. The power supply control includes phase compensation for adjusting a phase characteristic of a system charging the second power supply unit. The control unit obtains type information indicating a type of a power receiving device as a power transmission destination, obtains control information corresponding to the power receiving device as the power transmission destination from a storage unit based on the type information, the storage unit stores control information required for phase compensation according to the type of the power receiving device, and the control unit performs phase compensation based on the obtained control information.

[0018] Effects of the Invention

[0019] According to the technology of the present disclosure, even if the power receiving devices are of different types, it is possible to perform optimal power transmission control for each power receiving device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 1 is a schematic diagram illustrating a contactless power transmission system 100 according to an embodiment of the technology disclosed herein.

[0021] Figure 2 1 is a schematic diagram illustrating an operation state of the contactless power transmission system 100 when the vehicle-mounted device 10 performs power supply control.

[0022] Figure 3 1 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.

[0023] Figure 4 Schematic diagram illustrating the operating state of the contactless power transmission system 100 before the start of power supply control.

[0024] Figure 5 Schematic diagram showing the configuration of the contactless power transmission system 100 when the second power transmission is performed.

[0025] Figure 6 1 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.

[0026] Description of Reference Numerals

[0027] 10 Vehicle-mounted devices

[0028] 11 Vehicle side coil

[0029] 12, 32 Resonant Circuit

[0030] 13. First power conversion circuit

[0031] 14 Filter

[0032] 15 Voltage detection circuit

[0033] 17 Secondary batteries

[0034] 18 First Ministry of Communications

[0035] 20 Vehicle side control unit

[0036] 21 Comparator

[0037] 22 Compensator

[0038] 23 Pulse generation unit

[0039] 24 Compensator setting unit

[0040] 30 Power supply unit

[0041] 31 Power supply side coil

[0042] 33 Second power conversion circuit

[0043] 34 capacitors

[0044] 35 Voltage detection circuit

[0045] 36 Third power conversion circuit

[0046] 37 Second Ministry of Communications

[0047] 40 Power supply side control unit

[0048] 50 servers

[0049] 51 Storage

[0050] 60 Network

[0051] 100 Contactless power transmission system. DETAILED DESCRIPTION

[0052] Figure 1This is a schematic diagram of a contactless power transmission system 100, representing one embodiment of the technology disclosed herein. The contactless power transmission system 100 includes an onboard device 10 mounted on a vehicle, for example; a power supply device 30 located in a location (such as a parking lot, commercial facility, or home) where the vehicle containing the onboard device 10 can be parked; and a server 50 connected to a network 60, such as the Internet. The server 50 includes a storage unit 51 including a storage medium such as a semiconductor memory or a hard disk. The onboard device 10 is configured to be connectable to the network 60 and capable of communicating with the server 50 via the network 60.

[0053] The contactless power transmission system 100 is configured to enable first power transmission from the onboard device 10 to the power supply device 30, and second power transmission from the power supply device 30 to the onboard device 10. The onboard device 10 and the power supply device 30 perform contactless power transmission using magnetic coupling between coils, such as a magnetic field resonance method or an electromagnetic induction method. During the first power transmission, the onboard device 10 serves as the power transmitter, and the power supply device 30 serves as the power receiver. During the second power transmission, the onboard device 10 serves as the power receiver, and the power supply device 30 serves as the power transmitter.

[0054] The vehicle equipped with the in-vehicle device 10 includes a secondary battery 17 (denoted as BAT in the figure) such as a lithium-ion battery or a nickel-metal hydride battery, and an electric motor as a driving source driven by the power of the secondary battery 17. The vehicle is, for example, an automobile having wheels (neither of which is shown) including drive wheels driven by the power of the electric motor and steerable wheels.

[0055] 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 arranged between the first power conversion circuit 13 and the secondary battery 17, a voltage detection circuit 15 for detecting the terminal voltage Vb of the secondary battery 17, a first communication unit 18 and a vehicle-side control unit 20.

[0056] Resonant circuit 12 includes, for example, a capacitor connected in series with vehicle coil 11. During the first power transmission, vehicle coil 11 and resonant circuit 12 constitute a power transmission unit that transmits power to power supply device 30 via contactless power transmission.

[0057] During the first power transmission, the first power conversion circuit 13 uses power from the secondary battery 17 to generate power for the vehicle-side coil 11 and the resonant circuit 12, and then supplies this power to the vehicle-side coil 11 and the resonant circuit 12. The first power conversion circuit 13 includes switching elements such as transistors. During the first power transmission, it functions as an inverter, for example, to convert direct current (DC) power supplied from the secondary battery 17 into high-frequency alternating current (AC). The high-frequency AC power converted by the first power conversion circuit 13 is input to the vehicle-side coil 11. The high-frequency AC power is then induced by electromagnetic induction in the power supply coil 31 of the power supply device 30, which is spaced apart and opposed to the vehicle-side coil 11.

[0058] The filter 14 is provided to stabilize power and eliminate noise.

[0059] The first communication unit 18 is an interface for performing short-range wireless communication. For example, Wi-Fi (registered trademark) or Bluetooth (registered trademark) can be used for short-range wireless communication.

[0060] 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.

[0061] 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 for detecting 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.

[0062] The resonant circuit 32 includes, for example, a capacitor connected in series with the power supply coil 31. During the first power transmission, the power supply coil 31 and the resonant circuit 32 constitute a power receiving unit that receives power transmitted from the vehicle-mounted device 10 by contactless power transmission.

[0063] The second power conversion circuit 33 operates as a rectifier during the first power transmission, and converts the high-frequency AC power input from the power supply side coil 31 into DC power.

[0064] The capacitor 34 is charged by the DC power 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 the load connected to the third power conversion circuit 36.

[0065] The third power conversion circuit 36 ​​operates as an inverter during the first power transmission, converting the DC power discharged from the capacitor 34 into AC power of the commercial power frequency. The AC power of the commercial frequency converted by the third power conversion circuit 36 ​​is supplied to a load such as a power distribution network or home appliances.

[0066] The second communication unit 37 is an interface for performing short-range wireless communication. For example, Wi-Fi (registered trademark), Bluetooth (registered trademark), etc. can be used for short-range wireless communication.

[0067] The power supply 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 .

[0068] During the second power transmission from the power supply device 30 to the vehicle-mounted device 10, the third power conversion circuit 36 ​​is replaced by a power factor correction circuit in the power supply device 30. In addition, the second power conversion circuit 33 works as an inverter to convert the AC power input from the power factor correction circuit into a high-frequency AC power suitable for power transmission. The high-frequency AC power converted by the second power conversion circuit 33 is input to the power supply side coil 31. As a result, the high-frequency AC power is induced in the vehicle side coil 11 by electromagnetic induction. The first power conversion circuit 13 of the vehicle-mounted device 10 works as a rectifier during the second power transmission to convert the high-frequency AC power input from the vehicle side coil 11 into DC power. The converted DC power is supplied to the secondary battery 17 and stored.

[0069] During the first power transmission, the vehicle-side control unit 20 obtains the terminal voltage Vc of the capacitor 34 of the power supply device 30 and performs power supply control to control the power supplied to the vehicle-side coil 11 and the resonant circuit 12 via the first power conversion circuit 13 so that the terminal voltage Vc reaches a predetermined target voltage.

[0070] Thus, during the first power transmission, the vehicle-side control unit 20 controls the system that charges the capacitor 34 using the power transmitted from the onboard device 10 (the charging system comprising the resonant circuit 12 disposed between the first power conversion circuit 13 and the capacitor 34, the vehicle-side coil 11, the power supply-side coil 31, the resonant circuit 32, and the second power conversion circuit 33). The vehicle-side control unit 20 performs feedback control (feedback control) of the input power to the control system so that the output voltage (synonymous with the terminal voltage Vc) of the control system reaches the target voltage. Hereinafter, the transfer function of this control system will be referred to as transfer function G(s).

[0071] Figure 2This diagram illustrates the operating state of the contactless power transmission system 100 when the vehicle-mounted device 10 executes power supply control. When power supply control begins, the power supply-side control unit 40 acquires the terminal voltage Vc from the voltage detection circuit 35 and transmits the acquired terminal voltage Vc via the second communication unit 37 to the vehicle-mounted 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.

[0072] like Figure 2 As shown, the vehicle-side control unit 20 includes a comparator 21, a compensator 22, a pulse generator 23, and a compensator setting unit 24. These are implemented by hardware, software, or a combination thereof. The comparator 21 compares the terminal voltage Vc received via the first communication unit 18 with the target voltage and outputs the deviation.

[0073] 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) (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).

[0074] Specifically, compensator 22 performs phase compensation to adjust the phase characteristics of the controlled object, determining the input power of the controlled object so that the phase margin between the input and output of the controlled object is 0 degrees or greater. Pulse generator 23 generates drive pulses and supplies them to first power conversion circuit 13 so that the power output from first power conversion circuit 13 matches the input power determined by compensator 22.

[0075] Compensator setting unit 24 acquires the setting value of compensator 22 that ensures a phase margin of 0 degrees or greater between the input and output of the controlled object, and sets the acquired setting value in compensator 22. Once the values ​​(frequencies) of the poles and zeros in transfer function G(s) are determined, the setting value of compensator 22 that ensures a phase margin of 0 degrees or greater between the input and output of the controlled object can be determined based on these values. The values ​​of the poles and zeros of transfer function G(s) constitute one type of transfer function information related to transfer function G(s).

[0076] The transfer function G(s) can vary depending on the combination of the onboard device 10 and the power supply device 30. For example, assume that a specific type of onboard device 10 exists, and power is transmitted from this onboard device 10 to multiple different types of power supply devices 30. In this case, the compensator 22 of the onboard device 10 must be set differently for each type of power supply device 30.

[0077] In this embodiment, in the storage unit 51 of the server 50, for each combination of the vehicle-mounted device 10 and each type of power supply device 30, information related to the transfer function G(s) of the above-mentioned control object determined by the combination and information on the setting value of the compensator 22 corresponding to the transfer function G(s) (hereinafter also referred to as setting information) are pre-stored.

[0078] Figure 3 This diagram illustrates an example of information stored in the storage unit 51 of the server 50 and used during the first power transmission. Storage unit 51 stores information on the number and frequency of poles and zeros of the transfer function G(s), gain information (DC gain), and other information for each power supply type (three types in the example shown). The example of a power supply 30, model ○○ of company A, illustrates how the transfer function G(s) changes depending on the output current value of the control target. This power supply 30 stores information on the number and frequency of poles and zeros, as well as gain information, for each output current value.

[0079] In the illustrated example, the storage unit 51 stores, for each of the four transfer function information, setting information indicating the optimal setting value of the compensator 22 determined by the transfer function information. In the illustrated example, the setting information includes the setting mode of the compensator 22 and information (P term, I term, and D term) indicating the setting value of the compensator 22 in that setting mode. Figure 3 The transfer function information shown is uploaded to the server 50 from, for example, the supplier of the power supply device 30 . Figure 3 The setting information shown is uploaded to the server 50 by, for example, the supplier of the vehicle-mounted device 10 .

[0080] Figure 4 This diagram illustrates the operating state of contactless power transmission system 100 before power supply control begins. Before power supply control is executed, that is, before comparator 21 and compensator 22 determine the supply of power to vehicle coil 11 and resonant circuit 12, vehicle-side control unit 20 requests power supply device 30 to transmit its type information. Upon receiving this request, power supply control unit 40 transmits its own type information to vehicle-mounted device 10 via second communication unit 37.

[0081] When the vehicle-side control unit 20 obtains 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 the setting information corresponding to the type information. Upon receiving the request, the server 50 reads the setting information corresponding to the type information received from the onboard device 10 from the storage unit 51 and transmits the setting information to the onboard device 10.

[0082] When the vehicle-side control unit 20 obtains 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. Figure 3 In the data example shown, the setting information is the setting value information of the compensator 22 itself, so the compensator setting unit 24 sets the setting information directly to the compensator 22. When the setting value of the compensator 22 is set, the vehicle-side control unit 20 starts the above-mentioned power supply control.

[0083] As described above, according to the contactless power transmission system 100, before power supply control begins, setting information for phase compensation corresponding to the transfer function G(s) determined by the combination of the power supply device 30 and the onboard device 10 is transmitted from the server 50 to the onboard device 10. The onboard device 10 then controls the power supplied during power supply control based on this setting information. Therefore, even when various types of power supply devices 30 are combined with the onboard device 10, optimal power transmission control can be performed according to the combination of power supply devices 30.

[0084] In addition, the storage unit 51 may store only Figure 3 The transfer function information is shown as an example. In this case, the vehicle-side control unit 20 obtains transfer function information corresponding to the type information of the power supply device 30 at the power transmission destination from the server 50. Furthermore, the compensator setting unit 24 generates information on the setting value of the compensator 22 based on the obtained transfer function information and sets the generated setting value in the compensator 22. This reduces the capacity of the storage unit 51 and facilitates the generation of information stored in the storage unit 51, thereby reducing system construction costs.

[0085] Figure 5 : is a schematic diagram showing the configuration of the contactless power transmission system 100 when the second power transmission is performed. Figure 5 In the example of FIG, the power supply device 30 is configured to be connectable to the network 60 and to be communicable with the server 50 .

[0086] When performing the second power transmission, AC power is supplied to second power conversion circuit 33 from a distribution network, commercial power source, or the like via power factor correction circuit 36A, instead of third power conversion circuit 36. Second power conversion circuit 33 converts the AC power input from power factor correction circuit 36A into high-frequency AC power. Power supply control unit 40 includes comparator 41, compensator 42, pulse generator 43, and compensator setting unit 44, which correspond to comparator 21, compensator 22, pulse generator 23, and compensator setting unit 24 in vehicle control unit 20, respectively.

[0087] During the second power transmission, the power supply side control unit 40 obtains the terminal voltage Vb of the secondary battery 17 from the vehicle-mounted device 10, and performs power supply control to control the power supplied to the vehicle side coil 31 and the resonant circuit 32 via the second power conversion circuit 33 so that the terminal voltage Vb becomes a predetermined target voltage.

[0088] In this way, during the second power transmission, the power supply side control unit 40 takes the system that charges the secondary battery 17 by the power transmitted from the distribution network or commercial power supply to the vehicle-mounted device 10 as the control object, and controls the input power of the control object so that the output voltage (synonymous with the terminal voltage Vb) of the control object becomes the target voltage.

[0089] When power supply control by power supply control unit 40 begins, vehicle control unit 20 acquires terminal voltage Vb from voltage detection circuit 15 and transmits the acquired terminal voltage Vb to power supply device 30 via first communication unit 18. Terminal voltage Vb transmitted from first communication unit 18 is received by second communication unit 37 and acquired by power supply control unit 40.

[0090] The comparator 41 compares the terminal voltage Vb acquired via the second communication unit 37 with the target voltage and outputs a deviation therebetween.

[0091] The compensator 42 determines the input power of 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 .

[0092] Specifically, compensator 42 performs phase compensation to adjust the phase characteristics of the controlled object, determining the input power of the controlled object so that the phase margin between the input and output of the controlled object is equal to or greater than 0 degrees. Pulse generator 43 generates drive pulses and supplies them to second power conversion circuit 33 so that the power output from second power conversion circuit 33 matches the input power determined by compensator 42.

[0093] The compensator setting unit 44 acquires a setting value of the compensator 42 that makes the phase margin between the input and output of the control target equal to or greater than 0 degrees, and sets the acquired setting value in the compensator 42 .

[0094] Figure 6 This diagram illustrates an example of information stored in the storage unit 51 of the server 50 and used during the second power transmission. Storage unit 51 stores information on the number and frequency of poles and zeros of the transfer function G(s), gain information (DC gain), and other information for each type of onboard device (three types in the example shown). The example of a model ○○ onboard device 10 from company A shows how the transfer function G(s) changes depending on the output current value of the control target. This onboard device 10 stores information on the number and frequency of poles and zeros, as well as gain information, for each output current value.

[0095] In the illustrated example, the storage unit 51 stores, for each of the four transfer function information, setting information indicating the optimal setting value of the compensator 42 determined by the transfer function information. In the illustrated example, the setting information includes the setting mode of the compensator 42 and information (P term, I term, and D term) indicating the setting value of the compensator 42 in that setting mode. Figure 6 The transfer function information shown is uploaded to the server 50 by, for example, a supplier of the vehicle-mounted device 10 . Figure 6 The setting information shown is uploaded to the server 50 by, for example, the supplier of the power supply device 30 .

[0096] Before executing power supply control, the power supply control unit 40 requests the vehicle-mounted device 10 to transmit the type information of the vehicle-mounted device 10. Upon receiving the 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.

[0097] When the power supply control unit 40 obtains the type information from the in-vehicle device 10 via the second communication unit 37, it transmits the type information to the server 50 via the network 60 and requests the server 50 to transmit the setting information corresponding to the type information. Upon receiving the request, the server 50 reads the setting information corresponding to the type information received from the power supply device 30 from the storage unit 51 and transmits it to the power supply device 30.

[0098] When the power supply side control unit 40 obtains 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. Figure 6 In the example, the setting information is the information of the setting value of the compensator 42 itself, so the compensator setting unit 44 sets the setting information directly to the compensator 42. When the setting value of the compensator 42 is set, the power supply side control unit 40 starts the power supply control described above.

[0099] During the second power transmission, the storage unit 51 may store only Figure 6 In this case, the power supply control unit 40 acquires transfer function information corresponding to the type information of the vehicle-mounted device 10 to which the power is to be transmitted from the server 50. Furthermore, 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.

[0100] At least the following matters are described in this specification: Although corresponding components and the like in the above-mentioned embodiment are shown in brackets, the present invention is not limited thereto. (1)

[0102] A power transmission device (vehicle-mounted device 10 or power supply device 30), wherein:

[0103] The power transmission device includes:

[0104] A power transmission unit (the vehicle-side coil 11 and the resonant circuit 12 , or the power supply-side coil 31 and the resonant circuit 32 ) that transmits power to a power receiving device (the power supply device 30 or the vehicle-mounted device 10 ) through contactless power transmission;

[0105] a power conversion unit (the first power conversion circuit 13 or the second power conversion circuit 33 ) that generates power to be supplied to the power transmission unit using power from the first power supply unit (the secondary battery 17 or the commercial power supply) and supplies the power to the power transmission unit; and

[0106] a control unit (the vehicle-side control unit 20 or the power supply-side control unit 40) configured to obtain a terminal voltage (terminal voltage Vc or terminal voltage Vb) of the second power supply unit (the capacitor 34 or the secondary battery 17) charged by the power received by the power receiving device, and to control the power conversion unit, and to perform power supply control for controlling the supplied power via the power conversion unit so that the terminal voltage reaches a target voltage;

[0107] The control unit acquires type information indicating the type of the power receiving device at the power transmission destination, and based on the type information, acquires control information corresponding to the power receiving device at the power transmission destination from a storage unit (storage unit 51), wherein the storage unit stores control information (either setting information or transfer function information) required for phase compensation according to the type of the power receiving device, and

[0108] The control unit performs the phase compensation based on the acquired control information.

[0109] According to (1), it is possible to perform appropriate phase compensation for each power receiving device of different types. Therefore, it is possible to perform optimal power transmission control between power receiving devices of various circuit configurations. (2)

[0111] The power transmission device according to (1) is configured to be able to communicate with a server (server 50) via a network (network 60), wherein:

[0112] The storage unit is provided in the server.

[0113] According to (2), by using the control information stored in the storage unit of the server, it is no longer necessary to apply a design for optimal phase compensation to the power transmitting device for each type of power receiving device, thereby reducing the cost of the power transmitting device. In addition, since the control information is stored in the server, the optimal phase compensation settings for new types of power receiving devices can be continuously updated without changing the software of the power transmitting device. Furthermore, even in the event of damage to the power transmitting device, the control information stored in the storage unit can be easily confirmed, making it possible to understand the type of power supply control being performed. (3)

[0115] The power transmission device according to (2), wherein

[0116] The control unit includes a compensator (compensator 22 or compensator 42) for performing the phase compensation.

[0117] The control information is information indicating a setting value of the compensator.

[0118] According to (3), it is only necessary to obtain the setting value of the compensator from the server and set it in the compensator, thereby reducing the cost and processing load of the power transmission device. (4)

[0120] The power transmission device according to (2), wherein

[0121] The control unit includes a compensator (compensator 22 or compensator 42) for performing the phase compensation.

[0122] The control information is transfer function information related to the transfer function of the system.

[0123] The control unit generates information indicating a setting value of the compensator based on the acquired transfer function information.

[0124] According to (4), the storage unit can be simplified and the construction cost of the system can be reduced. (5)

[0126] The power transmission device according to (4), wherein

[0127] The transfer function information includes information indicating the poles and zeros of the transfer function.

[0128] According to (5), the storage unit can be simplified and the construction cost of the system can be reduced. (6)

[0130] The power transmission device (vehicle-mounted device 10 ) according to any one of (1) to (5), wherein:

[0131] The power transmission device is provided in a vehicle including an electric motor as a driving source, and the electric motor is driven using the electric power from the first power supply.

[0132] According to (6), electric power can be transmitted from the vehicle to the load connected to the power receiving device, and the surplus electric power of the vehicle and the electric power of the vehicle in the event of a disaster can be effectively utilized. (7)

[0134] The power transmission device (power supply device 30 ) according to any one of (1) to (5), wherein:

[0135] The power transmission device is installed in a place where a vehicle can be parked. The vehicle includes the power receiving device and an electric motor as a driving source driven by the electric power from the second power supply.

[0136] According to (7), the second power supply unit of the vehicle can be charged appropriately.

Claims

1. A power transmission device, wherein: The power transmission device comprises: a power transmitting unit that transmits power to a power receiving device through contactless power transmission; a power conversion unit that generates power to be supplied to the power transmission unit using the power of the first power supply unit and supplies the power to the power transmission unit; as well as a control unit configured to obtain a terminal voltage of a second power supply unit charged by power received by the power receiving device, control the power conversion unit, and perform power supply control for controlling the supplied power via the power conversion unit so that the terminal voltage reaches a target voltage; The power supply control includes adjusting phase compensation of a phase characteristic of a system charging the second power supply unit. The control unit acquires type information indicating the type of the power receiving device at the power transmission destination, and based on the type information, acquires control information corresponding to the power receiving device at the power transmission destination from a storage unit, wherein the storage unit stores the control information required for the phase compensation according to the type of the power receiving device. The control unit performs the phase compensation based on the acquired control information.

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

3. The power transmission device according to claim 2, wherein: The control unit includes a compensator for performing the phase compensation. The control information is information indicating a setting value of the compensator.

4. The power transmission device according to claim 2, wherein: The control unit includes a compensator for performing the phase compensation. The control information is transfer function information related to the transfer function of the system, The control unit generates information indicating a setting value of the compensator based on the acquired transfer function information.

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

6. The power transmission device according to any one of claims 1 to 5, wherein: The power transmission device is provided in a vehicle including an electric motor as a driving source, and the electric motor is driven using electric power from the first power supply unit.

7. The power transmission device according to any one of claims 1 to 5, wherein: The power transmission device is installed in a place where a vehicle can be parked. The vehicle includes the power reception device and an electric motor as a driving source driven by electric power from the second power supply unit.

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