基于改进梅森旋转算法的永磁同步电机双随机SVPWM高频电磁振动抑制  

Double Random SVPWM High-Frequency Electromagnetic Vibration Suppression of Permanent Magnet Synchronous Machine Based on Improved Mersenne Twister Algorithm

作　　者：陈浈斐 万向民 陈书桐 王磊[1] 王枫[1] Chen Zhenfei;Wan Xiangmin;Chen Shutong;Wang Lei;Wang Feng(School of Electrical and Power Engineering Hohai University,Nanjing 211100 China)

机构地区：[1]河海大学电气与动力工程学院,南京211100

出　　处：《电工技术学报》2025年第8期2504-2517,共14页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51907052)。

摘　　要：在以变频器驱动的永磁同步电机控制系统中,传统的空间矢量脉宽调制(SVPWM)技术会在逆变器开关频率及其倍频处产生高频电流谐波,进而导致永磁同步电机在运行过程中产生较大的高频电磁振动。因此,提出一种随机开关频率与随机零矢量结合的双随机SVPWM控制方法,应用于永磁同步电机高频电流谐波频谱扩展中,该方法可分散集中在开关频率及其倍频处的高频谐波,有效地削弱高频电磁振动。同时,采用改进梅森旋转(MT)算法生成随机数,增强了随机序列的随机性和空间遍历性,保证了双随机SVPWM控制方法的扩频效果。实验结果表明,基于改进MT算法的双随机SVPWM控制方式达到了有效抑制电机高频段电磁振动的目的。In the inverter-driven permanent magnet synchronous machine(PMSM)control system,high-frequency current harmonics near the switching frequency and its multiples are generated using space vector pulse width modulation(SVPWM),which brings high-frequency electromagnetic vibration.Therefore,a double random SVPWM control method combining random switching frequency and random zero vector is applied to the high-frequency current harmonic spectrum expansion.Meanwhile,the random number is generated by the improved Mersenne twister(MT)algorithm,which enhances the random performance of the random sequences and ensures the spreading effect of the double random SVPWM control method.Firstly,random zero vector control can be achieved by changing the action time of the zero vector and reassigning the randomized zero vectors into the space vectors.Secondly,the switching frequency of the traditional SVPWM control method is fixed,and the random switching frequency control can be achieved by changing the fixed switching frequency of the inverter and dispersing the harmonics at the switching frequency and its multiples into the specified frequency domain.Thirdly,the random number is generated by the improved MT algorithm,which is applied to the double random SVPWM control of the permanent magnet synchronous machine to enhance the degree of freedom and spatial traversal of the random sequence.The new control method proposed is named LKMT-DRC.Experimental verifications are conducted on a 4.4 kW fractional-slot permanent magnet synchronous machine.The PMSM phase current harmonics and vibration acceleration under the conventional SVPWM control and LKMT-DRC control are compared,and the vibration suppression effect of the LKMT-DRC control is analyzed using different spreading ranges.Under the inverter power supply mode,the harmonic frequencies introduced by the SVPWM control mode are mainly fk±2f0 and fk±4f0,and the frequency of the introduced high-frequency radial electromagnetic force wave is mainly fk±f0.Compared with the traditional

关 键 词：永磁同步电机 电流谐波 电磁振动 双随机空间矢量脉宽调制(SVPWM) 

分 类 号：TM351[电气工程—电机]