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PWM变换器

2009-10-15 16:47:36| 分类： a little | 标签： |举报 |字号大中小订阅

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脉宽调制变换器—直流电动机调速系统，简称直流脉宽调速系统，或直流PWM调速系统，在中、小容量的高动态性能系统中广泛应用。

脉宽调制变换器的作用：用脉冲宽度调制的方法，把恒定的直流电源电压调制成频率一定、宽度可变的脉冲电压序列，从而可以改变平均输出电压的大小，以调节电机转速。

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