说明：  这个例子展示了如何建立一个使用正弦脉宽调制（SPWM）的三相电压源转换器的模型。 该调制方案将参考正弦波与更高频率的重复三角波进行比较，以产生信号脉冲。该模型可用于选择合适的L、C和脉冲调制方案参数。
(This example shows how to model a three-phase voltage-sourced converter that uses Sinusoidal Pulse-Width Modulation (SPWM). This modulation scheme compares a reference sine wave with a higher-frequency repeating triangle wave in order to generate the pulses. The model can be used to support selection of suitable values for L, C and the pulse modulation scheme parameters.)