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

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。

In this paper, a carrier modulation PWM control method based on effective time was studied for the open-phase running state of the six-phase permanent magnet synehronous motor （PMSM） system driven by the nine-switeh eonverter. The basle prineiple of nine-switeh eonverter and earrier modulation PWM eontrol based on effeetive time was given. The mathematical model of six-phase PMSM under normal eondition was established. Aeeording to the eorresponding eon- straint eonditions of the single phase and two-phases eireuit breaker, the mathematical model of the motor after single phase eircuit breaker and two-phases eireuit breaker was established by using the space deeoupling transformation matrix. A simulation experiment was earried out in Matlab/Simulink to verify the feasibility of the proposed eontrol method.