INSTANTANEOUS STARTER OF SINGLE-PHASE INDUCTION MOTOR

摘要

PURPOSE: An instantaneous starter of a single-phase induction motor is provided to improve the life of a switch. CONSTITUTION: A starting switch and a starting condenser of a single induction motor are removed. The input current of the motor is detected by a small size detector(11), and on-off time of an auxiliary winding is determined. The small size detector(11) comprises a primary winding and a secondary winding of a ferrite core, and the winding ratio of the primary and secondary windings is determined by the capacitance of the motor. The magnitude of the input current of a single-phase induction motor is determined by Zener diodes(12,13). The trigger is determined through an instantaneous starter.