Method and apparatus for starting an induction motor

Details Method and apparatus for starting an induction motor Method and apparatus for starting an induction motor

2005-06-07

2005-06-07

Duda, Rina (Department: 2837)

Electricity: motive power systems

Induction motor systems

C318S459000, C318S500000, C318S778000, C318S785000

Reexamination Certificate

active

06903532

ABSTRACT:
A starting circuit for an induction motor is provided whereby a stationary rotor flux is established then a stored charge supplied to a motor winding in order to provide a starting torque. Before applying a mains power supply to the motor after the starting torque has been applied, a back EMF is sensed, directly or indirectly, to provide an indication that the rotor is turning before the mains supply is connected to the motor. This provides a reliable and simple method for ensuring that a mains supply may be safely connected to the motor.

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patent: WO 97/30509 (1997-08-01), None

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