Three‐phase double auxiliary resonant commutated pole inverter topology and analysis of its working principle

This study presents a double auxiliary resonant commutated pole (ARCP) inverter topology and modulation strategy. In the proposed inverter, the zero‐voltage‐switching (ZVS) turn‐off of auxiliary switches influenced by parasitic circuit elements from the wiring process can be avoided. It is assured that the auxiliary switches achieve ZVS turn‐off reliably. Hence, the reliability of the ARCP inverter is improved, especially in high‐power application. According to the equivalent circuits in different operation modes under the proposed modulation strategy, the working principle, soft‐switching implementation condition, and parameter design procedure of the proposed inverter are analysed successively in this study. Finally, a 10 kW, 16 kHz double ARCP inverter prototype is built. Experimental results are given to demonstrate the validity of the proposed inverter.