摘要：两电平SVPWM（空间矢量脉宽调制）控制技术在电机调速系统中得到了广泛的应用，这种控制技术下的输出电压在开关频率整数倍处会产生幅值较高的谐波，是电机产生电磁噪声的主要来源。为了使输入电机的电流谐波得到抑制，首先对三电平SVPWM控制技术与两电平SVPWM控制技术进行分析比较，建立了基于Matlab两种拓扑的系统仿真模型，并在模型的基础上对不同电路拓扑的电流谐波进行仿真分析和试验验证，验证了三电平SVPWM技术在减振降噪方面的有效性，并在船舶推进系统中得到了应用。
关键词：谐波抑制；matlab；三电平SVPWM；永磁同步电机

Abstract: Twolevel SVPWM(Space Vector Pulse Width Modulation) control technology has been widely used in motor speed control system. At the same time, twolevel SVPWM leads to output voltages high harmonic in integer times of the switching frequency, which is the main source of motors electromagnetic noise. In order to suppress current harmonic, this paper presented work in the following three aspects. First of all, it compared threelevel SVPWM and twolevel SVPWM control technology. Then, system simulation models were established in Matlab. Finally, simulation analysis and experimental verification were both presented about the above two kinds of SVPWM control technology. All of the above work validates the damping and noise reduction effectiveness of the threelevel SVPWM control technology, which has been successfully applied in ship propulsion system.
Key words: harmonic suppression; Matlab; threelevel SVPWM; PMSM