Synchronous motor control

Details Synchronous motor control Synchronous motor control

1983-09-01

1985-10-29

Smith, Jr., David

Electricity: motive power systems

Synchronous motor systems

Armature winding circuits

318721, H02P 540

Patent

active

045502811

ABSTRACT:
Apparatus and method for controlling a synchronous motor driving a square-law torque load at variable speeds by employing a frequency changer. The armature voltage Va may be controlled so that the ratio Va/N at motor speeds above a predetermined value is greater than Va(100)/N(100), where N(100) is the rated speed of the motor and Va(100) is the armature voltage at that speed. Below a predetermined speed, the armature voltage may be controlled so that the ratio Va/N is less than Va(100)/N(100).

REFERENCES:
patent: 3427526 (1969-02-01), Kernick
patent: 3967173 (1976-06-01), Stich
patent: 4047083 (1977-09-01), Plunkett
patent: 4085355 (1978-04-01), Fradella
patent: 4088932 (1978-05-01), Okuyama et al.
patent: 4296367 (1981-10-01), Hirata

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