摘要
在永磁同步电机控制系统中,传统的空间矢量脉宽调制(SVPWM)会在开关频率及其倍频处产生大量的电压谐波,针对该问题,提出了一种改进的随机开关频率SVPWM控制策略,通过在随机开关频率SVPWM中引入幅值随机变化的正弦函数,并选择合理的参数,应用于永磁同步电机电压谐波频谱扩展,该方法使谐波频谱分布更加均匀,并且进一步降低了谐波幅值,有效削弱了电磁噪声。通过仿真对比分析和谐波扩展性能评估,验证了新型随机SVPWM控制策略的优越性。
In the permanent magnet synchronous motor control system,the traditional Space Vector Pulse Width Modulation(SVPWM)generates a large number of voltage harmonics at the switching frequency and its multiples.To solve this problem,an improved random switching frequency SVPWM control is proposed.The strategy is to introduce a sine function with a random change in amplitude in the random switching frequency SVPWM and select reasonable parameters to apply to the voltage harmonic spectrum extension of the permanent magnet synchronous motor.This method makes the harmonic spectrum distribution more uniform and further reduces the harmonic amplitude,effectively weakens the electromagnetic noise.The superiority of the new stochastic SVPWM control strategy is verified through simulation comparison analysis and harmonic expansion performance evaluation.
作者
吴元凯
范菁
周颖
WU Yuankai;FAN Jing;ZHOU Ying(University Key Laboratory of Information and Communication on Security Backup and Recovery in Yunnan Province,Yunnan Nationalities University,Kunming 650500,China)
出处
《电子设计工程》
2021年第19期13-18,共6页
Electronic Design Engineering
基金
国家自然科学基金项目(61540063)
教育部人文社会科学研究青年基金项目(20YJCZH129)
云南省应用基础研究计划项目(2018FD055)。
关键词
永磁同步电机
随机开关频率
空间矢量脉宽调制
频谱分析
电磁噪音
permanent magnet synchronous motor
random switching frequency
space vector pulse width modulation
spectrum analysis
electromagnetic noise
