Thin type DC brushless motor

Details Thin type DC brushless motor Thin type DC brushless motor

1986-08-29

1988-07-19

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 42, 310156, 310162, 310257, H02K 710

Patent

active

047587512

ABSTRACT:
A thin type DC brushless motor comprises a permanent magnet rotor, a stator core which is arranged concentrically with the rotor, and stator coils which are wound on the stator core. The stator core is so configured as to include a ring-shaped core portion which surrounds the permanent magnet of the rotor and which has a thickness substantially equal to the axial thickness of the permanent magnet, and a plurality of coil winding core portions which extend radially outwardly from the outer periphery of the ring-shaped core portion, which have a thickness less than the thickness of the ring-shaped core portion and which serve to dispose the stator coils thereon. The ring-shaped core portion is formed with notches so as to leave salient interpole portions disposd upon sides of the respective coil winding core portions as viewed in the rotating direction of the rotor, on front and rear surfaces of the coil winding core portions as viewed in the direction of the permanent magnet.

REFERENCES:
patent: 2323114 (1943-06-01), Bradford et al.
patent: 2553760 (1951-05-01), Gille
patent: 2804680 (1957-09-01), Flagg, Jr.
patent: 2814746 (1957-11-01), Boerdijk
patent: 4004168 (1977-01-01), Haydon
patent: 4355248 (1982-10-01), Manson
patent: 4514655 (1985-04-01), Hosoya

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