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US 2019/0356168 A1Published application
Wireless power transmission device and power transfer system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorTakahiro MISAWA
Life of this patent
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Abstract
A power supply ECU is configured to carry out extreme value search control for searching for a frequency at which a detected value of power loss is minimized, by oscillating a frequency of output power from an inverter. Then, the power supply ECU determines whether or not extreme value search in extreme value search control is poorly proceeding, and when extreme value search is poorly proceeding, the power supply ECU increases an amplitude of frequency oscillation of output power from the inverter.
Claims9
A wireless power transmission device comprising:
- a power transmitter configured to wirelessly transmit power to a power reception device;
- an inverter configured to generate power at a prescribed frequency and output the generated power to the power transmitter;
- a loss detector configured to detect power loss;
- and
- a controller configured to control output power from the inverter,
- the controller being configured to carry out extreme value search control for searching for an optimal frequency at which power loss detected by the loss detector is minimized, by oscillating a frequency of the output power, and
- the controller being configured to determine whether extreme value search in the extreme value search control is poorly proceeding and to increase an amplitude of frequency oscillation of the output power when the extreme value search is poorly proceeding.
4 more elements
A 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 power at a prescribed frequency and output the generated power to the power transmitter,
- a loss detector configured to detect power loss, and
- a controller configured to control output power from the inverter,
- the controller being configured to carry out extreme value search control for searching for a frequency at which power loss detected by the loss detector is minimized, by oscillating a frequency of the output power, and
- the controller being configured to determine whether extreme value search in the extreme value search control is poorly proceeding and to increase an amplitude of frequency oscillation of the output power when the extreme value search is poorly proceeding.
7 more elements
Dependencies are inferred from the claim text.