Compact-sized permanent magnet type stepping motor

Details Compact-sized permanent magnet type stepping motor Compact-sized permanent magnet type stepping motor

1984-07-05

1987-01-13

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 42, 310259, H02K 2726

Patent

active

046366687

ABSTRACT:
A compact-sized stepping motor including a laminated stator assembly provided on an inner periphery thereof with a plurality of stator poles, stator coils magnetically connected to the laminated stator assembly, and a rotor having a plurality of rotor poles opposed to the stator poles. The rotor has assembled therein a permanent magnet and is rotatably supported between housings. The upper and the lower housings are each provided with a disc-shaped locating portion engageable with the inner peripheries of the stator poles of the laminated stator assembly, and the center-alignment between the stators and the rotor is assured by the locating portions, so that an accurate phasic relationship can be obtained between the rotor and the stators. The laminated stator assembly has a non-magnetic member core plate and a plurality of stator plates laminated on opposite sides of the non-magnetic member core plate. The stator plates are laminated on the core plate such that they are substantially an integral stator plate, and thereafter, the stator plate is separated into stator pieces for each pole associated with the stator coils.

REFERENCES:
patent: 3804562 (1974-04-01), Hansson
patent: 4048548 (1977-09-01), Nakajima et al.
patent: 4221985 (1980-09-01), Larson et al.
patent: 4224544 (1980-09-01), McKinnon et al.
patent: 4347457 (1982-08-01), Sakamoto
patent: 4423447 (1983-12-01), Nishida et al.
patent: 4437027 (1984-03-01), Yamamoto et al.
patent: 4455499 (1984-06-01), Sudler

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