Contactless power transmission device and power transfer system
First Claim
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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 in accordance with a drive frequency to the power transmission unit; and
a control unit configured to control the inverter,the control unit executinga first control for controlling the transmission power to target power by adjusting a duty of an output voltage of the inverter, anda second control for controlling a turn-on current by adjusting the drive frequency, the turn-on current indicating an output current of the inverter at a rising of the output voltage,when a current supplied from the inverter to the power transmission unit exceeds a predetermined limit value during adjustment of the drive frequency by the second control, the control unit decreasing the target power in the first control.
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Abstract
A power supply ECU executes transmission power control for controlling transmission power to target power by adjusting the duty of an output voltage of an inverter and turn-on current control for controlling a turn-on current to a target value by adjusting the drive frequency of the inverter. When a current supplied from the inverter to a power transmission unit exceeds a predetermined limit value during adjustment of the drive frequency of the inverter by the turn-on current control, the power supply ECU decreases target power in the transmission power control.
47 Citations
6 Claims
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1. A contactless power transmission device, comprising:
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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 in accordance with a drive frequency to the power transmission unit; and a control unit configured to control the inverter, the control unit executing 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 the drive frequency, the turn-on current indicating an output current of the inverter at a rising of the output voltage, when a current supplied from the inverter to the power transmission unit exceeds a predetermined limit value during adjustment of the drive frequency by the second control, the control unit decreasing the target power in the first control. - View Dependent Claims (2, 3)
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4. A power transfer system, comprising:
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a power transmission device; and a power reception device, the power transmission device including a power transmission unit configured to transmit electric power to the power reception device in a contactless manner, a voltage-source inverter configured to supply transmission power in accordance with a drive frequency to the power transmission unit, and a control unit configured to control the inverter, the control unit executing 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 the drive frequency, the turn-on current indicating an output current of the inverter at a rising of the output voltage, when a current supplied from the inverter to the power transmission unit exceeds a predetermined limit value during adjustment of the drive frequency by the second control, the control unit decreasing the target power in the first control. - View Dependent Claims (5, 6)
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Specification