描述
数字直流调速器的特点是体积小，输出功率大，技术难点是控制电路复杂且要求的响应速度。举个例子：660v交流变频器要做到1500kw以上的功率，硬件成本不说，光机箱大小就得好几个十个立方了吧，直流调速器输出同样功率的块头，两个立方米足够了。直流调速器在钢铁、橡塑、能源、化工等大功率，低速扭应用的场合，一直有着和变频同样重要的地位。
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