离心开关

由于电动机的起动过程很短，一般中小型电动机的起动时间都在1～3s内，所以在离心开关断开前后，电机转速变化很快。

Because a motor start quickly , such as the start time of ordinary middle and small motors is between 1 and 3 seconds , the change of its rotate speed is very fast while the centrifugal switch is breaking away .

该系统根据离心开关断开瞬间电机电流的变化规律来判断并测出离心开关的断开转速。

The fundamental principal is to detect the sudden change of stator current while the centrifugal switch breaking off .

单相电动机离心开关断开转速的微机测试

Microcomputer Measurement on Centrifugal Switch Breaking Speed of Single Phase Motor

电机离心开关断开瞬时转速测量仪

Transient Rotate Speed Meter of Motor for the Centrifugal Switch 's Breaking Away

一种新型的电动机离心开关断开转速测量仪

A New Type of Meter for Measuring Switching-off Speed of Motor 's Centrifugal Switch

介绍了单相电动机离心开关断开转速的微机测试系统，该系统利用单板机控制，以电动机起动电流作为开关断开信号。

The paper introduced a microcomputer measuring system that takes measurement of the cen-triffugal switch breaking speed of single phase induction motor .

测量的难点是：（1）获得离心开关断开瞬时，既无时延又无稳定的信号；

There are two difficulty problems : ( 1 ) how to capture a no-delay and steady signal at that instant time ;

以电机整机测试来代替离心开关单独元件测试的传统办法，从而能准确测出整机装配后离心开关的断开转速。

Microcomputer Measurement on Centrifugal Switch Breaking Speed of Single Phase Motor It can test off-state rotational speed exactly after the motor assembled .

经离心测试，开关闭合阈值加速度为15gn，闭合电阻为2Ω；

Centrifugal test shows that switch-on threshold acceleration is 15 g_n while the contact resistance is 2 Ω .