摘要
三电平逆变器虚拟空间矢量脉宽调制(VSVPWM)应用广泛,但由于是三电平控制,在某些区域会产生窄脉冲,从而带来不必要的开关损耗和热量积累。分析了VSVPWM的窄脉冲分布,利用差模电压和共模电压对窄脉冲进行了抑制,同时将中性点电位控制在小范围内波动。仿真和试验证明了该方法能够抑制绝大部分窄脉冲,并且不会造成输出波形畸变和谐波增加。
Virtual space vector pulse width modulation(VSVPWM)of three-level inverter is widely used.But due to the three-level inverter control,narrow pulses are generated in certain region,which results in unnecessary switching loss and heat accumulation.The narrow pulse distribution of VSVPWM is analyzed,and the narrow pulses are suppressed by the injection of the differential mode voltage and the common mode voltage with the neutral-point voltage controlled within a small range.Simulation and experiment prove that the proposed method can suppress most of the narrow pulses without causing distortion of the output waveform and increase of harmonics.
作者
邱绵浩
王明玉
马岳
QIU Mianhao;WANG Mingyu;MA Yue(Vehicle Engineering Department,Army Academy of Armored Forces,Beijing 100072,China;School of Automobile Engineering,Harbin Institute of Technology at Weihai,Weihai 264209,China)
出处
《电机与控制应用》
2020年第11期98-103,共6页
Electric machines & control application
基金
山东省自然科学基金项目(ZR2017MEE011)。
关键词
三电平逆变器
虚拟空间矢量脉宽调制
窄脉冲
中性点电位
three-level inverter
virtual space vector pulse width modulation(VSVPWM)
narrow pulse
neutral-point voltage
