Hybrid-type stepping motor

Details Hybrid-type stepping motor Hybrid-type stepping motor

1990-06-28

1991-01-08

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310185, 310269, 310179, H02K 3700

Patent

active

049838679

ABSTRACT:
A stepping motor includes a stator having a plurality of magnetic poles wound with windings of three phases or four phases, and a rotor formed by a pair of rotary plates each having a multiplicity of gear-like salient poles and an axially magnetized permanent magnet sandwiched between the rotary plates. Where the number of magnetic poles of the stator is represented by m, the number of gear-like salient poles of the rotary plate is Z, and n is an integer equal to or larger than 1, in order to obtain a minute step angle, m, n and Z are selected to satisfy the following relationship: when m=9, and a 3-phase winding stator, Z=9n.+-.3.

REFERENCES:
patent: 3949253 (1976-04-01), Broadway et al.
patent: 4021015 (1977-05-01), Maeder et al.
patent: 4081703 (1978-03-01), Madsen et al.
patent: 4385247 (1983-05-01), Satomi
patent: 4675564 (1987-06-01), Isozaki
patent: 4733113 (1988-03-01), Smith
patent: 4739201 (1988-04-01), Brigham et al.
patent: 4758752 (1988-07-01), Leenhouts
patent: 4910475 (1990-03-01), Lin
patent: 4947066 (1990-08-01), Ghibu et al.
Proceedings Sixth Annual Symposium: Incremental Motion Control Systems and Devices, May 24-27, 1977, England, pp. 331-342, G. I. Biscoe et al., "The Rationalisation and Standardization of Stepping Motors and Their Test Methods".

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