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WK-4型电铲是我国七十年代的产品,已为露天矿山普遍使用。这种电铲采用了磁放大器(C)-发电机(F)-电动机(D)的控制系统(简称C-F-D控制系统),实现了无触点调速控制,操作平稳,工作可靠,与过去三绕组发电机(3FD)系统的老式电铲D-4型相比,大大缩短了电动机起动和制动的时间(据测定,分别由6秒和5秒缩短成4秒和3.5秒),从而缩短了电铲在采矿工作面上一个工作周期的时间,使小时装载量得以提高。
WK-4 shovel is China’s seventies products, has been widely used in open mines. This shovel uses a magnetic amplifier (C) - generator (F) - motor (D) control system (CFD control system for short), to achieve non-contact speed control, smooth operation, reliable, and the past three Shorter motor start-up and braking times (measured from 6 seconds and 5 seconds to 4 seconds and 3.5 seconds, respectively), compared to the conventional shovel D-4 version of the Winding Generator (3FD) system, resulting in shortened The shovel hours of mining work in a mining cycle, the hour load to be increased.