说明：  此示例演示如何使用PWM发生器（三相，两电平）来控制转换器。PWM发生器的输入为参考交流波形和400 V直流链路电压。有两个时间范围：一个用于控制器波形，另一个用于负载电压和电流。执行模型时，频谱分析仪打开并显示a相负载电流的频率数据。
(This example demonstrates how to use a PWM generator (three-phase, two-level) to control the converter. The input of PWM generator is reference AC waveform and 400 V DC link voltage. There are two time ranges: one for the controller waveform and the other for the load voltage and current. When the model is executed, the spectrum analyzer turns on and displays the frequency data of phase a load current.)