the substitute circuit of electric motor centrifugal switch part 2

Published:2011/6/9 0:14:00 Author:Ariel Wang | Keyword: substitute, electric, motor, centrifugal, switch | From:SeekIC

When power supply gets through,the voltage can't change suddenly as the capacity of CZ is larger.And the relay K can't pull in.After a few minutes,the voltage of C2 is charged to a certain value(when the input AC voltage is in the positive half cycle ,it charges C1 by VD1.When the input voltage is in the negative half cycle,the voltage charged by C1 and input voltage are added together.Then it charges C2 by VD2. )K is conducted to pull in.The normally-closed contacts are disconnected.It breaks the starting circuit of M.The main winding of M works alone.It completes the starting process of electric motor.



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