基于高斯分布的随机脉冲位置SVPWM谐波抑制策略  

Harmonic Suppression Strategy of SVPWM with Random Pulse Position Based on Gauss Distribution

作　　者：吴文明 李国丽[2,3] 谢芳[3] 梁康康 邱臣铭 WU Wenming;LI Guoli;XIE Fang;LIANG Kangkang;QIU Chenming(School of Electrical Engineering and Automation, Anhui University, Hefei 230601, China;National Engineering Laboratory of Energy-saving Motor & Control Technology, Anhui University, Hefei 230601,China;Anhui Province Laboratory of Industrial Energy-saving and Safety,Anhui University, Hefei 230601,China;Collaborative Innovation Center of Industrial Energy-saving and Power Quality Control, Anhui University, Hefei 230601,China)

机构地区：[1]安徽大学电气工程与自动化学院,合肥230601 [2]国家节能电机与控制工程实验室(安徽大学),合肥230601 [3]安徽大学安徽省工业节能安全实验室,合肥230601 [4]安徽省工业节能与电能质量控制协同创新中心(安徽大学),合肥230601

出　　处：《微电机》2020年第8期50-55,89,共7页Micromotors

基　　金：国家自然科学基金重点项目(51637001);国家自然科学基金项目(51607002);安徽省自然科学基金(1708085ME131);安徽省博士后科研基金(2017B179)。

摘　　要：电动汽车异步电机在运行过程中因谐波含量高而导致电流畸变,产生转矩脉动现象。针对此问题,本文提出了一种基于高斯分布的随机脉冲位置SVPWM谐波抑制方法。首先,建立矢量控制模型,分析控制模型以及谐波电流产生的原因;然后,用数学方法分析SVPWM调制过程,知晓谐波与调制过程中开关频率的关系;其次,选取电流谐波幅值作为特征值。在低速和高速两种工况下,对比GD-RPPSVPWM和固定频率SVPWM两种控制策略得到的电流谐波幅值;最后,搭建实验平台,在不同工况下,得到各次谐波电流幅值,通过与FFSVPWM策略数据对比,验证了方法的正确性和先进性。The high harmonic content in the asynchronous motor of electric vehicle results in current distortion and torque ripple.To solve this problem,a new method of harmonic suppression based on Gauss distribution-random pulse position space vector pulse width modulation(GD-RPPSVPWM)was proposed.Firstly,the vector control model was established to analyze the control model and the cause of harmonic current.Then,the SVPWM modulation process was analyzed by mathematical method to know the relationship between harmonic and switching frequency in the modulation process.Secondly,the vector control model is established,and the current harmonic amplitude is selected as the eigenvalue.At low speed and high speed,the current harmonic amplitudes obtained by GD-RPPSVPWM and fixed frequency SVPWM control strategies are compared.Finally,an experimental platform is built to obtain the harmonic current amplitudes under different conditions.By comparing with FFSVPWM strategy data,the correctness and advancement of this method are verified.

关 键 词：电动汽车 异步电机 时间谐波 随机脉冲位置 谐波抑制 

分 类 号：TM343.2[电气工程—电机]