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US 11,962,170 B2Granted
Power transmission device
AssigneeMitsubishi Electric Corporation
InventorTakuya Nakanishi
Life of this patent
Estimating the term…
Abstract
An inverter and power transmission coils are connected such that currents flow in opposite directions to each other when selection switches of respective power transmission coils adjacent to each other, out of a plurality of power transmission coils disposed in the movement direction of a mobile body, are caused to be conductive. The difference in currents flowing in the opposite directions is measured, and compared with a threshold, whereby whether or not a power reception coil mounted to the mobile body is present above the power transmission coil can be determined.
Claims6
A power transmission device comprising:
- an inverter for outputting AC power;
- a plurality of power transmission coils connected to the inverter;
- and
- a selection switch for performing conduction and disconnection between the inverter and each power transmission coil,
- the power transmission device being for performing non-contact power feeding between a power reception coil mounted to a mobile body and the power transmission coil,
- the inverter and the power transmission coils being connected such that currents flow in opposite directions to each other when the selection switches of respective power transmission coils adjacent to each other, out of the plurality of power transmission coils disposed in a movement direction of the mobile body, are caused to be conductive,
- the power transmission device comprising
- a current sensor for measuring a difference in the currents flowing in the opposite directions, and
- a controller to determine whether or not the power reception coil is present in a range that allows power feeding from the power transmission coil, by comparing a measurement value of the current sensor with a threshold.
6 more elements
Dependencies are inferred from the claim text.