A Resonant DC-Link Inverter and Its Voltage Compensation Strategy

作     者：Song, Jiaxiang Chu, Enhui Wang, Wenwen Gao, Linyan Li, Jingjing Lin, Xiaoyang 

作者机构：Northeastern Univ Coll Informat Sci & Engn Shenyang Peoples R China 

出 版 物：《IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS》 (IEEE J. Emerg. Sel. Top. Power Electron.)

年 卷 期：2023年第11卷第1期

页      面：775-785页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：National Natural Science Foundation of China 

主　　题：Voltage Capacitors RLC circuits Inductors Resonant inverters Topology Switches Loss of output voltage resonant dc-link (RDCL) Index Terms sinusoidal pulsewidth modulation (SPWM) soft switching voltage compensation 

摘      要：In order to solve the output voltage loss problem caused by the zero-voltage notch of resonant dc-link (RDCL) inverter and improve system efficiency, this article proposes an RDCL inverter and its voltage compensation method. The topology of this auxiliary circuit is simpler, and the resonant current is separated from the load current by parallel auxiliary switch, which reduces the current stress of the main switches. At the same time, the method is based on the conventional sinusoidal pulsewidth modulation (SPWM);this method first calculates the operation time of the auxiliary circuit based on the magnitude of the phase current, second adjusts the position of the triangular carrier according to the calculation results, and finally generates the driving signals for early turn-on and delayed turn-off, which solves the voltage loss problem and improves the voltage utilization, the output voltage is the same as that of the ideal SPWM. The working principle, parameter design conditions, and voltage compensation method are analyzed in detail in the article. Finally, a 5-kW/16 kHz prototype is created with insulated gate bipolar transistor (IGBT) as switching device, which verifies the novel resonant dc-link inverter and its modulation strategy is effective.