Motor

Details Motor Motor

1994-12-20

1997-10-21

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, 324174, H02K 122

Patent

active

056799900

ABSTRACT:
A motor includes a rotor magnet, driving coils and the detecting wire elements. The rotor magnet is mounted on a rotor yoke and has a plurality of magnetic pole pairs arranged at equal angular spacings, each having north and south poles. At least one pair of is unequally magnetized so that the north and south poles thereof are of unequal strength. The other magnetic pole pairs are equally magnetized so that the north and south poles thereof are of equal strength. The driving coils are provided on a stator yoke opposite from the rotor magnet. The detecting wire elements are provided on the stator yoke. The detecting wire elements are arranged at an angular spacing substantially equal to that of the magnetic pole pairs of the rotor magnet. The detecting wire elements generate output signals when the rotor yoke comprising the rotor magnet rotates to cause the unequally magnetized magnetic pole pair to move across from the detecting wire elements.

REFERENCES:
patent: 4109170 (1978-08-01), Fujita et al.
patent: 4501997 (1985-02-01), Muller
patent: 4551676 (1985-11-01), Amemiya et al.
patent: 4746862 (1988-05-01), Ueki
patent: 4801830 (1989-01-01), Ogino et al.
patent: 4902924 (1990-02-01), Ushiro et al.
patent: 5101131 (1992-03-01), Ushiro et al.
patent: 5408153 (1995-04-01), Imai et al.

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