中文说明：这 simulink 模型实现了三电平逆变器 SPWM 调制。它是非常明确和可以理解为假装了解如何模拟 SPWM 逆变器在 simulink 下任何绿色手用户。基于连续时间模拟此 mdl 文件，输出保存到工作区。
English Description：
This simulink model realizes the SPWM modulation in three level inverters. It is quite clear and understandable for any green-hand users pretending to learn how to simulate SPWM inverter in Simulink. This mdl file based on continuous time simulation, the output is saved to workspace.