Motor control system for a single phase induction motor

Details Motor control system for a single phase induction motor Motor control system for a single phase induction motor

1981-10-26

1983-08-30

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318786, H02P 142

Patent

active

044019335

ABSTRACT:
A single phase induction motor control system employs power line assisted starting and runs at higher than power line frequency from an electronically generated inverter supply. This inverter supply is employed to provide an out of phase mains frequency signal to the run winding during starting in order to create the rotating magnetic field needed to start the motor. After the motor has started, the power line supply is disconnected from the start winding and the inverter supply frequency is increased gradually to a final value corresponding to the desired operating speed. In this system no phase shifting capacitors are needed to provide the out of phase starting voltage and the run winding is optimized for running conditions.

REFERENCES:
patent: 3882364 (1975-05-01), Wright et al.
patent: 4060754 (1977-11-01), Kirtley, Jr.
"Coaxial Drive for Magnetic Disk File", IBM TDB, vol. 23, No. 3, Aug. 1980, p. 1198.

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