Constant-Voltage and Constant-Current Output Using P-CLCL Compensation Circuit for Single-Switch Inductive Power Transfer

The characteristic of constant-current output (CCO) and constant-voltage output (CVO) on full-bridge topology can be realized by using a traditional double-sided LCC compensation network. The switching from CCO mode to CVO mode can be realized by switching the operating frequency in CCO mode (f
_CC
) to the operating frequency in CVO mode (f
_CV
). However, the operating frequency is generally high, the value of L
_P
, L
_S
, and M in the loosely coupled transformer will have a significant influence on the operating frequency of the circuit, which makes it difficult to carry out a long-distance transmission at a lower operating frequency, otherwise, the self-inductance of the coils will be high, even though it is used to transfer low-power. Therefore, in this article, a novel P-CLCL compensation topology based on a single-switching circuit (SSC) is proposed to address these problems. The switching from CCO to CVO can also be realized by changing the operating frequency from f
_CC
to f
_CV
, and a relatively lower operating frequency and a relatively farther transmission distance than full-bridge topology are realized. The calculation method of circuit parameters, implementation of zero-voltage-switching, sensitivity analysis, and load-independent output are discussed. Finally, the simulation and experiment are carried out to verify the correctness of the analysis.