Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1992-04-29
1994-03-29
Wysocki, Jonathan
Electricity: motive power systems
Induction motor systems
Primary circuit control
318799, H02P 700
Patent
active
052988473
ABSTRACT:
A non-invasive system for accurately determining the counter EMF or speed voltages in an electric motor during motor operation. The system includes a mechanism for determining the phase angle of the stator current within the dq frame of reference and a mechanism for transforming feedback voltages into a new frame of reference defined by this phase angle. The speed voltage values thereby detected are free from stator resistance effects and represent parameters of improved accuracy which can be used in motor control functions.
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Kerkman Russel J.
Rowan Timothy M.
Seibel Brian J.
Allen-Bradley Co., Inc.
Hamann H. Frederick
Horn John J.
Wysocki Jonathan
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