Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1981-07-17
1984-02-07
Isen, F. W.
Electricity: motive power systems
Switched reluctance motor commutation control
318138, 318439, G05B 1940
Patent
active
044306032
ABSTRACT:
A brushless direct current outer rotor motor with a substantially cylindrical air gap (14), particularly for driving magnetic disks. The rotor (16) of the motor (10) supports a permanently-magnetized exciter magnet (13, 13") having at least two pairs of poles and a permanently-magnetized control magnet (18, 18', 18"). At least one detector (20, 34, 26) of rotary position cooperates with its control magnet, and is responsive to the magnetic field to sense the position of the rotor. There is also provided commutating means (32) responsive to the detector of the rotary position, and a stator winding means (12) connected to the commutating means. A control pulse generator stage (21,29; 35,36; 47,55) adapted to generate one pulse only per each revolution of the rotor (16) is coordinated with the control magnet (18, 18', 18").
REFERENCES:
patent: 3848167 (1974-11-01), Ratschmeier
patent: 3903463 (1975-09-01), Kanamori
patent: 3916272 (1975-10-01), Grunleiter et al.
patent: 4070606 (1978-01-01), Morozumi et al.
patent: 4164691 (1979-08-01), Wada
patent: 4238692 (1980-12-01), An et al.
patent: 4266192 (1981-05-01), Ohtani
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