Electricity: motive power systems – Limitation of motor load – current – torque or force
Patent
1998-11-23
2000-04-04
Ro, Bentsu
Electricity: motive power systems
Limitation of motor load, current, torque or force
318254, 318701, H02P 612, H02P 705
Patent
active
060465611
ABSTRACT:
An improved commutation control method precisely controls commutation in a switched reluctance machine with a relatively low resolution position encoder and a low cost micro-processor based controller. The control method involves the formation of a motor position signal having logic level transitions, or edges, that define base commutation signals for commutating the motor phase windings in sequence with no phase advance. When no phase advance is desired, the controller turns the phase windings on and off in time with the respective base commutation signals. When phase advance is desired, the controller turns each of the windings on and off relative to the base commutation signal for the preceding phase winding. More specifically, the turn-on and turn-off points for phase advance control are timed to occur a delay time after the edges of the base commutation signal for the preceding phase. The delay time is determined by measuring the time between two successive edges of the motor position signal, and reducing such measure by a constant value corresponding to a selected linear profile of phase advance vs. motor speed. The control method may be utilized in the context of a motor control strategy in which the motor is operated with no phase advance at low speeds, at a fixed maximum phase advance at very high speeds, and at a speed dependent variable phase advance at intermediate motor speeds.
REFERENCES:
patent: 4164969 (1979-08-01), Kastilahn et al.
patent: 4477196 (1984-10-01), Ito
patent: 4480218 (1984-10-01), Hair
patent: 4520302 (1985-05-01), Hill
patent: 4551708 (1985-11-01), Welburn
patent: 4670696 (1987-06-01), Byrne et al.
patent: 4684866 (1987-08-01), Nehmer et al.
patent: 4707650 (1987-11-01), Bose
patent: 4904917 (1990-02-01), Hakluytt
patent: 4922169 (1990-05-01), Freeman
patent: 4933620 (1990-06-01), MacMinn et al.
patent: 4975608 (1990-12-01), Aspden
patent: 5010267 (1991-04-01), Lipo et al.
patent: 5072166 (1991-12-01), Ehsani
patent: 5196775 (1993-03-01), Harris et al.
patent: 5223771 (1993-06-01), Chari
patent: 5227709 (1993-07-01), Gauthier et al.
patent: 5296793 (1994-03-01), Lang
patent: 5321342 (1994-06-01), Kruse
patent: 5378975 (1995-01-01), Schweid et al.
patent: 5661381 (1997-08-01), Blackburn
patent: 5920175 (1999-07-01), Jones et al.
Disser Robert John
Monahan Michael Bernard
Zup Andrew Karl
General Motors Corporation
Ro Bentsu
Sigler Robert M.
LandOfFree
Commutation control method for a switched reluctance machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Commutation control method for a switched reluctance machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Commutation control method for a switched reluctance machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-368694