电工技术学报2017，Vol.32Issue(2)：206-215,227,11.
四开关三相逆变器全调制度范围内两种等效PWM算法
Two Types of Equivalent PWM Algorithms in the Full Modulation Region for Four-Switch Three-Phase Inverter
摘要
Abstract
The four-switch three-phase inverter (FSTPI) is the post-fault reconfigured topology for the two-level inverter with single-leg failure.In order to enhance the DC-link voltage of FSTPI,a space vector pulse-width modulation (SVPWM) algorithm in the over-modulation region is proposed.It divides the over-modulation region of FSTPI into over-modulation mode Ⅰ region,over-modulation mode Ⅱ region and over-modulation mode Ⅲ region depending on the modulation index.In order to reveal the relationship between SVPWM and carrier-based pulse-width modulation (CBPWM)algorithm of FSTPI,the equivalent carrier-based modulating functions of SVPWM in these three over-modulation modes are derived respectively,based on the PWM regular sample method.The change rules of the equivalent carrier-based modulating functions in the full modulation region are summarized with the modulation index changing afterwards.Theoretical analysis shows that the SVPWM of FSTPI is a special type of CBPWM algorithm in the full modulation region.Simulation and experimental results verify the theoretical analysis.关键词
故障重构拓扑/四开关三相逆变器/空间矢量脉宽调制/载波脉宽调制/过调制/调制函数Key words
Post-fault reconfigured topology/four-switch three-phase inverter/space vector PWM/carrier-based PWM/over-modulation/modulating function分类
信息技术与安全科学引用本文复制引用
刘勇超,葛兴来,蒲俊楷,唐启迪..四开关三相逆变器全调制度范围内两种等效PWM算法[J].电工技术学报,2017,32(2):206-215,227,11.基金项目
国家自然科学基金-高铁联合基金重点项目(U1134205)和国家自然科学基金(51207131、51277135)资助. （U1134205）
