Overmodulation Strategy for Four-Switch Three-Phase Inverter Based on Virtual Voltage Vector
作者单位：School of Electrical EngineeringDalian University of Technology School of Electrical Engineering & AutomationHarbin Institute of Technology
会议名称：《第36届中国控制会议》
主办单位：Dalian University of Technology;Systems Engineering Society of China (SESC);Technical Committee on Control Theory (TCCT), Chinese Association of Automation (CAA)
会议日期：2017年
学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0802[工学-机械工程] 0811[工学-控制科学与工程] 0701[理学-数学] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：supported by National Nature Science Foundation of China(51407023,51377013) China Postdoctoral Science Foundation(2013M540224) the Fundamental Research Funds for Central Universities(DUT15RC(4)04)
关 键 词：Virtual voltage vector superposition principle four-switch three-phase inverter modulated functions
摘 要：The four-switch three-phase inverter（FSTPI） is the fault-tolerant topology of the six-switch three-phase inverter（SSTPI）,and the maximum output voltage is limited in the linear modulation ***,an overmodulation strategy for FSTPI is presented,based on virtual voltage vector and superposition principle,in order to improve the utilization of the DC voltage,enhance the output capacity of the inverter and extend the operation range of induction *** with the traditional overmodulation strategy,the proposed strategy can make the inverter transit smoothly from the linear operation to the six-step operation with simple online computation,which is convenient for digital realization and can possess balanced output ***,the relationship between SVPWM and carrier-based PWM in the overmodulation region for FSTPI is *** simulation results illustrate the validity and effectiveness of the theoretical analysis.