Controlled current induction motor drive

Details Controlled current induction motor drive Controlled current induction motor drive

1975-09-26

1977-04-19

Rubinson, Gene Z.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318230, 318231, H02R 540

Patent

active

040191052

ABSTRACT:
Improved stable four-quadrant operation of an induction motor supplied with variable amplitude and frequency stator line current by a motor controller with a constant current source converter is achieved by using several feedback control loops to control the slip frequency as well as the stator line current amplitude and frequency. Speed feedback is employed with optional control of rotor speed. Motor performance is optimized by indirectly regulating air gap flux to its rated value by controlling slip frequency as a function of sensed stator current. Thus, torque is approximately linear with stator current.

REFERENCES:
patent: 3372323 (1968-03-01), Guyeska
patent: 3512067 (1970-05-01), Landau
patent: 3593083 (1971-07-01), Blaschke
patent: 3775649 (1973-11-01), Bayer et al.
patent: 3824437 (1974-07-01), Blaschke

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