基于TMS320F28335实现矢量空间解耦的六相空间矢量脉宽调制

摘要

提出用数字信号处理器芯片TMS320F28335作为功率驱动器主控芯片,实现矢量空间解耦的六相空间矢量脉宽调制控制方法.以双Y相移30°六相永磁同步电机为研究对象,推导出实现矢量空间解耦控制过程中12个扇区内ePWM硬件模块控制规律.试验结果表明,用TMS320F28335作为主控芯片,易于实现复杂的矢量空间解耦的多相电机驱动控制,且输出的多路PWM波形、滤波后的相电压波形和线电压波形符合双Y相移30°的永磁同步电机驱动要求,有效抑制电压谐波空间的5、7次谐波,达到抑制谐波电流的目的.%A chip of DSP TMS32OF28335 was proposed as a power driver control chip to realize the vector space decomposition control of 6-phase space vector pulse width modulation (SVPWM). A control law of ePWM hardware module was derived within 12 sectors considering the features of ePWM hardware, when the research object was a dual three-phase permanent-magnet synchronous motor ( DTPMSM ). The experimental results showed that the TMS320F28335, which was used as the control chip; was suitable to implement the complex process of vector space decoupling control for the multiphase machine drives. The outcome waveforms satisfied the requirements of the DTPMSM drive. The harmonic current would be reduced.