Affiliation:
1. School of Information and Control Engineering Liaoning Petrochemical University Fushun China
2. School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China
Abstract
SummaryThe paper designs an efficient three‐phase soft‐switching inverter with asymmetric auxiliary circuits, which is beneficial for further miniaturization and efficiency optimization. Only two auxiliary switches, one resonant inductor, and three resonant capacitors make up simple asymmetric auxiliary circuits of each phase, contributing to the reduction of power loss and hardware cost. As soon as the simple auxiliary circuits get involved in the operation of the designed inverter, main switches can realize zero‐voltage switching within the entire load range. The reduction of power loss of auxiliary circuits and main switches is conducive to further efficiency optimization. The paper expounds every operating status during one switching period. The relevant experimental waveforms make known that switching devices can realize soft‐switching. The efficiency reaches 99% at rated operation status of the designed inverter, confirming that the designed inverter has superiority over comparison objects in the experiment with regard to the efficiency. Thus, the structural simplification of auxiliary circuits is an effective method for further miniaturization and efficiency optimization.
Reference14 articles.
1. Novel SVPWM Method Based on Zero-Voltage Notch of Resonant DC-Link Inverter
2. An SVPWM method for parallel resonant DC‐link inverter with the smallest loss in the auxiliary commutation circuit;Chu E;IEEE Trans Power Electron,2022
3. Hybrid SVPWM Modulation Strategy for Auxiliary Resonant Commutated Pole Inverter
4. Modified Double Auxiliary Resonant Commutated Pole Inverter and its Modulation Strategy
5. Research on a novel modulation strategy for double auxiliary resonant commutated pole soft‐switching inverter with the shunt dead time;Chu E;IEEE Trans Power Electron,2016