1. Two sub-windings of secondary winding, capacitor and centrifugal switch are serially connected and then to external power supply.

2. In this paper, we introduce how to use 8031 singal-chip microcomputer to test the off -state rotational speed of centrifugal switch in a singal phase electrical machinery.

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

4. Once the motor reaches near design operating speed, the centrifugal switch activates, opening the contacts and disconnecting the startup winding from the power source.

5. The die-cast housing found on heavy-duty encoders allows the length of the shaft to be extended between bearings to allow a second encoder device or a mechanical centrifugal switch to be mounted.

6. Dompared to the shaded pole motor, these motors can generally provide much greater starting torque by using a special startup winding in conjunction with a centrifugal switch.

7. There are complete specifications. Powerful Motor can be started by centrifugal switch. It's equipped with automatic knife grinding device and lubrication system.