This article introduces a full bridge inverter in contactless power transfer of rotary steerable tool,achieving zero voltage switching of full bridge switch using the resonant element. The system reached 85% efficiency at 300W rated power.%针对旋转导向钻井工具中的非接触式电能传输系统,设计了一种井下高温软开关零电压式全桥逆变电路,通过谐振原理利用谐振元件实现全桥开关管的零电压开关,以降低开关损耗,使得非接触式电能传输系统在300 W额定功率下达到85%的传输效率。
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