**4. Conclusions**

A novel three-phase rectifier with zero-voltage-switching and zero-current-switching features was proposed. The design has been validated with simulation and experimental data captured on a 7 kW three-phase rectifier prototype. Efficiency improvement between hard-switch and soft-switch rectifiers peaks at 2.55% when the input line voltage is 220 V at full load. Mathematical equations to explain circuit operation have been derived and analyzed under a sequence of operating modes. The experimental results have confirmed the proposed design of the soft-switched rectifier in achieving high efficiency, high power factor, and low THD.

**Author Contributions:** C.-W.L. and C.-Y.P. designed, debugged the system, built some part of hardware and performed the experiment. C.-W.L. also mainly responsible for preparing the paper. H.-J.C., supervised the design, analysis, experiment, and editing the paper.

**Funding:** The authors would like to acknowledge the financial support of the Ministry of Science and Technology of Taiwan through gran<sup>t</sup> number NSC 103-2221-E-011 -064 -MY3.

**Conflicts of Interest:** The authors declare no conflict of interest.
