Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1980-05-27
1981-09-15
Smith, Jr., David
Electricity: motive power systems
Switched reluctance motor commutation control
318138, H02K 2300
Patent
active
042899982
ABSTRACT:
The single phase DC brushless motor is particularly useful as a gyro motor in a turn coordinator for aircraft. Essentially, the motor comprises a permanent ceramic rotor magnet with diametrically oppositely disposed stationary stator windings and a "Hall effect" sensor or Hall cell positioned adjacent to the rotor and responsive to the permanent magnet poles of the rotor to generate a commutating switching signal. The Hall cell is very economical to use and is capable of driving transistor switches directly for the stator windings without problems of extensive amplification and drift previously experienced. The immediate advantage of such a sensor is the complete elimination of brushes and conventional commutating bars and all of the attendant problems associated therewith. Cost savings are further realized by the use of bobbin wound coils for the stator windings rather than laying the windings into slots. Laminations are thus avoided and by the use of a ceramic rotor still further savings are achieved.
REFERENCES:
patent: 3230434 (1966-01-01), Bauerlein
patent: 3299335 (1967-01-01), Wessels
patent: 3331005 (1967-07-01), Lear et al.
patent: 3548223 (1970-12-01), Dittrich et al.
patent: 3559014 (1971-01-01), Rakes
patent: 3603161 (1971-09-01), Scharz
patent: 3707638 (1972-12-01), Nailen
patent: 3716769 (1973-02-01), Brunner
patent: 3961211 (1976-06-01), Vergues
Astronautics Corporation of America
Pastoriza Ralph B.
Smith Jr. David
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