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会员 A Novel L-S/N Compensation Topology for Inductive Power Transfer Systems with Constant Current Outputs and a Compact Receiver
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  • 2022/01/01
摘要
In many application scenarios of inductive power transfer, a compact receiver is required. Existing compensation topologies with a compact receiver only perform well in tightly coupled conditions but cannot be used in loosely coupled scenarios. A novel compensation topology with only primary shunt inductor and series capacitor(named as L-S/N) is proposed in this paper. There is only a rectifier and a receiving coil with fewer turns and less copper in the secondary side to form a compact receiver. On the primary side, the series capacitor is used to compensate for primary self-inductance, and the shunt inductor is used to compensate for the secondary self-inductance. Implementing this tuning method, L-S/N compensation has constant current output characteristics similar to Series/Series compensation, and the input zero phase angle can be achieved. In addition, the primary shunt inductor can naturally provide turn-off current to realize zero voltage switching. The proposed method is verified with a 1kW prototype. Experimental results show that the constant current output, input zero phase angle, and zero voltage switching are achieved. The peak efficiency reaches 95.5%. This method is suitable for applications where the weight, cost, and volume of the receiver is strictly limited.
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