日产万吨工作面电动机电压等级的选取

文中论述了矿井工作面电压升至3kv或6kV后涉及的几个问题,着重分析了升压后对电动机各方面的影响。并从刮板输送机电动机等起动与负载情况的需要,就国外电动机转矩、转速特性的要求与井下供电电压降的规定,提出供电电压降应保持的最低限值。并对升压后工作面电动机可靠性,特别是操作过电压与防电晕问题,做了综合分析。

SELECTION 0F VOLTAGE CLASS FOR MOTORS ON DAILY OUTPUT 10000t COAL FACE

The paper discusses the problems caused by escalation of voltage to 3kV or 6kV on coal face, analyses with emphasis the affect on motors derived from voltage escalation. In compliance with the need of starting and loading operation of scraper conveyor and other machines, the characteristic of torque and rotating speed of the motor, and voltage drop in underground mines as stipulated in foreign countries, the paper propounds the lowest limit of voltage drop of power supply to be kept, also analyses comprehensively the reliability of motors on face especially the problems of operational overvoltaKe and protection against corona due to voltage escalation.