Wireless power transmission for battery charging

摘要

A wireless power transmission system is provided for high power applications. The power transmission system is comprised generally of a charging unit configured to generate an alternating electromagnetic field and a receive unit configured to receive the alternating electromagnetic field from the charging unit. The charging unit includes a power source; an input rectifier; an inverter; and a transmit coil. The transmit coil has a spirangle arrangement segmented into n coil segments with capacitors interconnecting adjacent coil segments. The receive unit includes a receive coil and an output rectifier. The receive coil also has a spirangle arrangement segmented into m coil segments with capacitors interconnecting adjacent coil segments.

主权项

1. A wireless power transmission system, comprising:
a charging unit configured to transfer power using inductive power transfer and includes:
a power source;a rectifier configured to receive an alternating current (AC) input signal from the power source and convert the AC input to a direct current (DC) power;an inverter configured to receive the DC power from the rectifier and convert the DC power to an AC output signal at a desired resonant frequency; anda transmit coil configured to receive the AC output signal from the inverter and generate an alternating electromagnetic field, wherein the transmit coil has a spirangle arrangement segmented into n coil segments and capacitors interconnecting adjacent coil segments; a receive unit configured to receive power via inductive power transfer from the transmitting coil of the charging unit and includes:
a receive coil configured to receive the alternating electromagnetic field from the transmitting coil of the charging unit of the inverter and output an AC charging signal, wherein the receive coil has a spirangle arrangement segmented into m coil segments and capacitors interconnecting adjacent coil segments, where n and m are integers greater than two; andan output rectifier configured to receive the AC charging signal from the receive coil and convert the AC charging signal to a DC charging signal.