Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1993-03-12
1994-09-27
Shoop, Jr., William M.
Electricity: motive power systems
Switched reluctance motor commutation control
318439, 318139, H02R 2300
Patent
active
053509846
ABSTRACT:
A method for aligning a rotor of a brushless and sensorless DC motor, the motor having a stator with at least two coils, sets of the coils being selectively energizable by a power source connected to the motor, includes steps of energizing a first set of at least one coil of the at least two coils; generating a signal indicating whether the rotor has been rotated at a rotary speed greater than a predetermined rotary speed while the first set was energized; and when the signal indicates that the rotor has not been rotated at a rotary speed greater than the predetermined rotary speed, switching the connection between the power source and the motor and energizing a second set of at least one coil of the at least two coils. A device for controlling an alignment of a rotor of a brushless and sensorless DC motor includes a circuit for energizing a first set of at least one coil; a circuit for generating a signal indicating whether the rotor has been rotated due the first set having been energized; and a circuit for energizing a second set of at least one coil when the signal indicates the rotor has not been rotated.
REFERENCES:
patent: 4879498 (1989-11-01), Shinohara et al.
patent: 4928043 (1990-05-01), Plunkett
patent: 5223771 (1993-06-01), Chari
patent: 5231338 (1993-07-01), Bulgarelli et al.
Carobolante Francesco
Pace Ermanno
Bachand Richard A.
Jorgenson Lisa K.
Masih Karen
Robinson Richard K.
SGS-Thomson Microelectronics Inc.
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