用交流励磁电压测定直流电动机电刷中性线的方法

Way to Determine the Neutral Position of DC Motor Brushes by Means of AC Excitation Power Voltage

针对某电厂汽轮机直流油泵电动机因电刷位置不当造成换向不善最终导致电刷烧损的实例,对确定直流电动机电刷中性线位置的方法进行了讨论。提出采用交流电源对电动机励磁绕组进行励磁从而确定中性线位置的方法。

Against the fact that the DC motor carbon brush in the oil pump of the turbine generator was burnt because of the poor commutating caused by the improper installed position of the carbon brush, ways to determine whether of carbon brushes located on the neutral position or not was discussed. Thus, the way to apply AC power supply to excite the motor＇s excitation windings, and then, to de- termine the neutral position was introduced.