基于DSP正弦波调制的三电平变换器

Three-level Converters Based DSP SPWM

首先介绍了三电平 PWM 变换器的特点,比较了空间矢量控制方法、SHEPWM 方法和SPWM 方法的优缺点。详细地介绍了三电平中 SPWM 控制的原理,并讨论了用 DSP LF2407A 来实现 SPWM 的方法。最后通过仿真和实验验证了 SPWM 控制方法的特点,实验证实了用 DSP 实现三电平 SPWM 的方便性。

First of all, the eharacteristics of the three - level PWM inverter are introduced and the merits and demerits of SVPWM, SHEPWM and SPWM are compared. The control principle of SPWM is described accordingly. At last the scheme of SPWM implemented by DSP LF2407A is proposed. The characters of the SPWM for three-level converters and the convenience of the realization by DSP are verified by the experimental result.