Description
变频器和直流调速器，其实直流调速器的发展更早，但发展速度方面，应用之广，变频器已经遥遥领先于直流调速器，这就是为什么国家发展工业都二三十年了，国内竟然没有一家出色的直流调速器生产商。根据从业经验来看，高精度，大功率的直流调速器，清一色的进口货，在直流调速器技术方面，可以说连日本都不如欧美企业，但日本在运动控制领域却十分厉害。市场上常见的调速器品牌如：德国西门子；瑞典abb；英国欧陆（Parker）590；美国ct艾默生;美国a.b罗克韦尔；意大利安萨尔多等等。当然还有一些冷门牌子，唯一没有一家国产品牌，包括台湾。
微信里有同行问，直流调速器输出到底接几根线？可见在工业设备维修的普及有多远。直流调速器原理都是控制马达做功，顾名思义，直流调速器能控制的，当然就是直流马达了。大功率直流马达制造复杂，价格昂贵，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极高的响应速度。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，低速高扭应用的场合，一直有着和变频同样重要的地位。
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