Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1986-12-19
1988-08-16
Smith, Jr., David
Electricity: motive power systems
Induction motor systems
Primary circuit control
318798, H02K 130
Patent
active
047647132
ABSTRACT:
A method for providing a smooth transition to powered operation in a motor control system in which a variable voltage inverter regulates power to the motor on a volts per Hertz basis. The method is particularly applicable to systems for energizing and rapidly gaining control of a motor driving a load in which the motor armature is turning at the time that power is supplied from the variable voltage converter. The method is implemented by sweeping the frequency of the excitation applied to an alternating current motor while holding the magnitude of the excitation at a level sufficient to prevent over current excitation of the motor.
REFERENCES:
patent: 4409533 (1983-10-01), Kawabata
patent: 4417193 (1983-11-01), Hirata
patent: 4451112 (1984-05-01), Hattori et al.
patent: 4607205 (1986-08-01), Kito et al.
patent: 4642546 (1987-02-01), Schonherr
D'Atre John D.
Giewont William P.
Beusse James H.
General Electric Company
Smith Jr. David
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