九开关变换器驱动六相电机的载波调制 PWM控制

A Carrier Modulation Pwm Control of Six-Phase Motor Based on Nine-Switch Converter

摘要:

针对九开关变换器驱动六相永磁同步电机系统的断相运行状态,研究了一种基于有效作用时间的载波调制 PWM控制方法。给出了九开关变换器及基于有效作用时间的载波调制 PWM控制的基本原理,建立了正常情况下六相 PMSM的数学模型,根据单相和两相断路后电机相应的约束条件,采用空间解耦变换矩阵,分别建立了单相断路和两相断路后的电机数学模型,在 Matlab/Simulink中进行了仿真实验,验证了所提控制方法的可行性。

Abstract:

In this paper, a carrier modulation PWM control method based on effective time was studied for the open-phaserunning state of the six-phase permanent magnet synchronous motor (PMSM) system driven by the nine-switch converter.The basic principle of nine-switch converter and carrier modulation PWM control based on effective time was given. Themathematical model of six-phase PMSM under normal condition was established. According to the corresponding con.straint conditions of the single phase and two-phases circuit breaker, the mathematical model of the motor after singlephase circuit breaker and two-phases circuit breaker was established by using the space decoupling transformation matrix.A simulation experiment was carried out in Matlab/Simulink to verify the feasibility of the proposed control method.