CONTACTLESS POWER TRANSMISSION DEVICE AND POWER TRANSFER SYSTEM

摘要

A power transmission device includes a power transmission unit and a voltage-source inverter. A power supply ECU executes turn-on current control for controlling a turn-on current It to a target current Itr by adjusting a drive frequency f of the inverter, turn-on current It indicating an output current of the inverter at a rising of an output voltage of the inverter. A first case is a case where transmission power Ps has a first value which is lower than target power Psr and a second case is a case where the transmission power has a second value which is closer to target power Psr than the first value. The power supply ECU makes a change rate of the drive frequency in the second case lower than in the first case.

主权项

1. A contactless power transmission device comprising:
a power transmission unit configured to transmit electric power to a power reception device in a contactless manner; a voltage-source inverter configured to supply transmission power to the power transmission unit; and a control unit configured to control the inverter, the control unit configured to execute: a first control for controlling the transmission power to target power by adjusting a duty of an output voltage of the inverter; and a second control for controlling a turn-on current by adjusting a drive frequency of the inverter, the turn-on current indicating an output current of the inverter at a rising of the output voltage of the inverter, a first case being a case where the transmission power has a first value which is lower than the target power in the second control and a second case being a case where the transmission power has a second value which is closer to the target power than the first value in the second control, the control unit being configured to make a change rate of the drive frequency in the second case lower than in the first case.