TRIAC_STARTING_SWITCH_FOR_1_2_hp_MOTOR

Published:2009/7/7 3:04:00 Author:May | From:SeekIC

Triac replaces centrifugal switch normally used to control current through starting winding of single-phase induction motor. Value of R1 is chosen so triac turns on only when starting cur-rent exceeds 12A. When motor approaches nor-mal speed, running current drops to 8 A and triac blocks current through starting winding.- Circuit Applications for the Triac, Motorola, Phoenix, AZ, 1971,AN-466, p 8.



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