Motor starting circuit

Details Motor starting circuit Motor starting circuit

1990-07-05

1991-08-20

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318779, H02P 128

Patent

active

050417711

ABSTRACT:
A solid state starting and control circuit for AC motors employing a single phase power source is disclosed in which the normal motor starting capacitor and speed responsive switch or similar means for energizing and deenergizing the start winding are eliminated by use of an all electronic, sparkless circuit which provides phase displaced current to excite the motor starting winding and in which there is time regulated gradual decreasing of the starting current pulse width to deenergize the start winding.

REFERENCES:
patent: 3389315 (1968-06-01), Andreas et al.
patent: 3859591 (1975-01-01), Saunders
patent: 4801858 (1989-01-01), Min

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