Magnetic cover member for magnetic poles of DC motor

Details Magnetic cover member for magnetic poles of DC motor Magnetic cover member for magnetic poles of DC motor

1986-01-06

1987-11-17

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 42, 310 89, H02K 2304

Patent

active

047076305

ABSTRACT:
In a permanent type DC motor, a stator comprises a yoke and a plurality of magnetic pole pairs composed of permanent magnets and auxiliary poles. The plurality of magnetic pole pairs are held and fixed in intimate contact with the yoke by pressingly deforming a cylindrical thin plate made of magnetic material such as a steel plate. The fixture of the magnetic pole pairs composed of the permanent magnets and auxiliary poles is attained by a projecting part formed by pressingly deforming a part of the thin cylindrical plate made of the magnetic material toward a space between the adjacent pole pairs and by using U-shaped magnetic retaining pieces.

REFERENCES:
patent: 2971107 (1961-02-01), Jin
patent: 3265913 (1966-08-01), Irwin
patent: 4137884 (1979-02-01), Odazima et al.
patent: 4338533 (1982-07-01), Grafenschnell
patent: 4580072 (1986-04-01), Morishita
patent: 4587449 (1986-05-01), West
Journal of NIPPONDENSO Technical Disclosure, No. 30-39, Apr. 20, 1983, p. 39.

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