STARTER OF SINGLE-PHASE INDUCTION MOTOR, ENCLOSED MOTOR COMPRESSOR EMPLOYING STARTER AND APPARATUS EMPLOYING IT

摘要

PROBLEM TO BE SOLVED: To reduce power consumption extremely of a positive characteristics thermistor for starting connected in series with the auxiliary winding of a single-phase induction motor. SOLUTION: When a starting current flows through an auxiliary winding S, a main PTC 12 and an auxiliary PTC 14 generate heat by themselves to increase electric resistance. When the temperature of the auxiliary PTC 14 reaches 140°C, a snap action bimetal 18 is turned off to interrupt the current flowing through the main PTC 12 and starting operation of a single-phase induction motor 70 is completed. When the snap action bimetal 18 is turned off, a very small current flows only to the auxiliary PTC 14 side and the snap action bimetal 18 is held in off state by heat thus generated. COPYRIGHT: (C)2005,JPO&NCIPI