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对合康变频高压提升变频调速系统原理及调速系统进行了阐述,并介绍了四象限高压变频调速系统对煤矿提升进行技术改造的概况。目前矿用交流提升机普遍使用绕线转子式电动机转子串电阻调速控制系统。在减速和重物下放时能量通过转子电阻释放,能量不能回馈回电网,调速精度低,爬行速度不易控制,尤其是重物下放时,需要动力制动与转子串电阻及制动闸配合操作
The principle and speed regulation system of frequency conversion high-voltage frequency conversion speed control system of He Kang inverter are described, and the general situation of technological transformation of four-quadrant high voltage frequency conversion speed regulation system for coal mine lift is introduced. At present, mining exchange hoist commonly used rotor winding motor rotor winding resistor speed control system. The energy is released through the rotor resistance when the gear is decelerated and the weight is released. The energy can not be fed back to the power grid. The precision of the speed regulation is low and the crawling speed is not easy to control. In particular, when the weight is released, dynamic braking is needed in cooperation with the rotor string resistance and the brake