Wireless power transmission device and wireless power transfer system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorTakahiro Misawa
Life of this patent
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Abstract
An inverter generates transmission power at a prescribed frequency and supplies transmission power to a power transmitter. A power supply ECU is configured to carry out turn-on current control for controlling a turn-on current to a restriction value or less by manipulating a frequency of transmission power by means of the inverter. Turn-on current control includes first processing for determining a direction of manipulation of the frequency for lowering the turn-on current based on a direction of variation in turn-on current at the time when the frequency is varied.
Claims6
A wireless power transmission device comprising:
- a power transmitter configured to wirelessly transmit power to a power reception device;
- an inverter configured to generate transmission power at a prescribed frequency and supply transmission power to the power transmitter;
- and
- a controller configured to carry out turn-on current control for controlling a turn-on current to a restriction value or less by manipulating the frequency by means of the inverter,
- the turn-on current control including first processing for determining, based on a direction of variation in the turn-on current when the frequency is varied, a direction of manipulation of the frequency for lowering the turn-on current.
A wireless power transfer system comprising:
- a power transmission device;
- and
- a power reception device configured to wirelessly receive power from the power transmission device,
- the power transmission device including
- a power transmitter configured to wirelessly transmit power to the power reception device,
- an inverter configured to generate transmission power at a prescribed frequency and supply transmission power to the power transmitter, and
- a controller configured to carry out turn-on current control for controlling a turn-on current to a restriction value or less by manipulating the frequency by means of the inverter,
- the turn-on current control including processing for determining, based on a direction of variation in the turn-on current when the frequency is varied, a direction of manipulation of the frequency for lowering the turn-on current.
Dependencies are inferred from the claim text.