并联谐振直流环节逆变器的新型SVPWM方法  

A Novel SVPWM Method for Parallel Resonant DC Link Inverter

作　　者：褚恩辉[1] 亢云旌 李晶晶 CHU Enhui;KANG Yunjing;LI Jingjing(School of Information Science&Engineering,Northeastern University,Shenyang 110819,Liaoning Province,China)

机构地区：[1]东北大学信息科学与工程学院,辽宁省沈阳市110819

出　　处：《中国电机工程学报》2022年第6期2321-2333,共13页Proceedings of the CSEE

摘　　要：为降低并联谐振直流环节逆变器辅助换相电路的动作频率和损耗,以及辅助开关管的电流应力,该文提出一种新型空间矢量脉宽调制(space vector pulse width modulation,SVPWM)方法。新型SVPWM方法在实现所有开关管的软开关动作的基础上,在1个脉宽调制(pulse width modulation,PWM)周期内辅助换相电路只动作1次,从而降低辅助换相电路的动作频率和损耗;所提新型SVPWM方法通过增加分流死区时间,可避免谐振电流与负载电流相叠加,从而最大化地抑制辅助开关管的电流应力。新型SVPWM方法可适用于任何可调整零电压凹槽时间的并联谐振直流环节逆变器。在新型SVPWM方法下,根据不同工作模式的等效电路图,分析该逆变器的工作原理、软开关实现条件以及参数设计方法。最后使用绝缘栅双极型晶体管作为开关器件制作一台10kW、16kHz样机,通过实验验证所提调制策略的有效性。In order to reduce the operating frequency and loss of the auxiliary commutation circuit and the current stress of auxiliary switches of the parallel resonant DC link inverter,this paper proposed a novel space vector pulse width modulation(SVPWM)method.The novel SVPWM method could reduce the number of operations of the auxiliary commutation circuit to once in every pulse width modulation(PWM)cycle on the premise of realizing soft switching of all switches,thereby reducing the operating frequency and loss of the auxiliary commutation circuit.At the same time,by adding the shunt dead time,the novel SVPWM method could avoid the superposition of the resonant current and load current,thereby minimizing the current stress of auxiliary switches.In addition,the novel SVPWM method could apply to any parallel resonant DC link inverter with the ability of variable zero voltage duration.Under the novel SVPWM method,according to the equivalent circuits of different operation modes,the operation principle,soft switching realization conditions and parameter design methods of the inverter awere analyzed.Finally,a 10kW/16kHz prototype was built using insulated gate bipolar transistors(IGBT)to verify the validity of the novel SVPWM method.

关 键 词：并联谐振直流环节逆变器 调制策略 空间矢量脉宽调制 辅助换相电路 零电流开关 零电压开关 

分 类 号：TM46[电气工程—电器]