Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1998-09-29
2000-01-11
Masih, Karen
Electricity: motive power systems
Induction motor systems
Primary circuit control
318804, 318808, 318809, 318807, 318798, 318810, 318801, 318812, H02P 528
Patent
active
060140070
ABSTRACT:
A method and apparatus for starting a motor drive into a rotating motor, the method including determining an initial search frequency and search current wherein the current is less than a rated drive current, providing a d-axis flux generating current to the motor at the search frequency and at a magnitude equal to the search current, monitoring a q-axis flux error, decreasing the search frequency until the d-axis flux error is less than a threshold value, thereafter increasing the search current to the rated drive current and, after a flux-up period, providing both q-axis torque producing current and d-axis flux producing current to the motor.
REFERENCES:
patent: 5448150 (1995-09-01), Yamamoto et al.
patent: 5510689 (1996-04-01), Lipo et al.
patent: 5668459 (1997-09-01), Kim
patent: 5798628 (1998-08-01), Fujita et al.
patent: 5811956 (1998-09-01), Yamamoto
Kerkman Russel J.
Rowan Timothy M.
Seibel Brian J.
Allen-Bradley Company LLC
Horn John J.
Jaskolski Michael A.
Masih Karen
Miller John M.
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