Wireless power transmission in electric vehicles

摘要

Exemplary embodiments are directed to bidirectional wireless power transfer using magnetic resonance in a coupling mode region between a charging base (CB) and a battery electric vehicle (BEV). For different configurations, the wireless power transfer can occur from the CB to the BEV and from the BEV to the CB.

主权项

1. An apparatus, comprising:
a conductive charging interface (CCI) configured to receive a first AC power signal from an AC power distribution network; an antenna circuit configured to wirelessly receive, via an electromagnetic field from a transmitting device, charging power at a level sufficient to power or charge an electronic device or vehicle, and to provide a second AC power signal based upon the received charging power; a power factor correction (PFC) circuit shared by the CCI and the antenna circuit via a switching circuit configured to selectively couple the PFC circuit to the CCI or the antenna circuit; a power converter circuit operably coupled between the PFC circuit and the switching circuit; and a rectifier circuit operably coupled between the antenna circuit and the switching circuit, and configured to convert the second AC power signal to a DC output signal and pass the DC output signal through the power converter circuit when the PFC circuit is operably coupled to the antenna circuit, wherein the PFC circuit is configured to:
when operably coupled to the antenna circuit, receive the DC output signal from the rectifier circuit and reduce harmonics in the second AC power signal provided by the antenna circuit, via presenting a variable impedance to the rectifier circuit.