multilevel SPWM,多电平载波SPWM的各种调制方案，以单相H桥为例说明。

此功能为实现pwm控制直流电机的正反转、调速，在驱动H桥式电路方面的c语言编程。-This function is to achieve the pwm control the positive DC motor, speed, drive the H-bridge circuit, c programming language.

级联H桥三相七电平matlab仿真模型，分享供大家使用-Cascade H-bridge three-phase seven-level Matlab simulation model to share for everyone to use