Single phase DC brushless motor

Details Single phase DC brushless motor Single phase DC brushless motor

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

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