Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1983-08-04
1985-11-12
Shoop, Jr., William M.
Electricity: motive power systems
Switched reluctance motor commutation control
318138, 318439, 310 63, 310 68R, H02K 2902
Patent
active
045530750
ABSTRACT:
A simplified fan and brushless DC motor employs an annular permanent magnet magnetized in segments about its circumference. Each segment is oppositely radially magnetized with respect to its adjacent segments. Fan blades are located within the annular magnet. A coil comprising two electrically independent and bifilar wound windings, connected to be oppositely energized, and an electromagnet structure defining two pole pieces reside outside the permanent magnet annulus. A Hall effect device alternately energizes the separate coil windings in response to passage of the segments of the rotor magnet to alternately produce opposite magnetic fields in the pole pieces. Thus commutated, the double coil arrangement affects rotation of the rotor and the fan blades.
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Air Currents, vol. 2, No. 1, Rotron, Inc., Copyright 1977.
Michael Oppenheimer, "In IC form, Hall-Effect Devices Can Take on Many New Applications", Electronics, Aug. 2, 1971, pp. 46-49.
Jearl Walker, "The Amateur Scientist", Scientific American, Mar., 1982, pp. 142-152.
Brown Fred A.
Grouse Alan F.
Ro Bentsu
Rotron Incorporated
Shoop Jr. William M.
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