单相电机离心开关断开转速测量方法

Single-phase motor centrifugal switch's cut-off speed measurement method

为解决带电容起动的单相异步电动机离心开关断开转速测定方法的问题,在无需购置专门测试设备的情况下,利用较为普遍的反馈控制电机测试系统的数据采集功能,进行了转矩-转速特性曲线和电流-转速特性曲线的分析,建立了转矩与离心开关断开点、电流与离心开关断开点之间的关系,提出了利用特性曲线判断离心开关断开点的方法。以该方法在数台典型曲线的样机上对离心开关断开情况进行了评价,得出了具有针对性和适用性的结果。研究结果表明:该方法对于检测机构测量离心开关断开转速以及生产企业对离心开关的故障判断及型号选用都有一定的指导意义。

In order to solve the problems of the single-phase motor centrifugal switch＇s cut-off speed measurement method,without the specialized test equipment,the widely used feedback control motor test system was applied in data acquisition.After the analysis of torque-speed and current-speed characteristic curve,the relationship between torque and centrifugal switch cut-off point,current and centrifugal switch cut-off point was established.A method was presented to identify the centrifugal switch cut-off point.The situation of centrifugal switch cut-off were evaluated on several sample motors which has typical characteristic curves,the conclusions of compliance and usability were given.The experimental results show that the method has directive to either inspecting departments which use it to measure centrifugal switch cut-off speed,or motor manufacturing enterprises which use it to make failure judgment and model selection to centrifugal switch.