Hybrid type stepping motor

Details Hybrid type stepping motor Hybrid type stepping motor

1996-09-26

1999-01-05

LaBalle, Clayton

Electrical generator or motor structure

Dynamoelectric

Rotary

310 67R, 310164, 310112, 310114, H02K 3724

Patent

active

058567143

ABSTRACT:
A hybrid type stepping motor includes coils located on the outer or inner periphery of stator yokes provided on a fixed shaft. This structure allows the coils to be disposed more easily and thus at a lower cost. Furthermore, it is possible to achieve a great increase in the density of winding. Auxiliary magnetic plates and auxiliary magnets are disposed at both ends of a stator yoke assembly so that a magnetic circuit is formed at both ends. According to the invention, a motor having any desired number of phases may be achieved. A magnet is disposed in each space between adjacent teeth of either a rotor or a stator or otherwise of both rotor and stator. The magnetomotive force of the magnet suppresses leakage magnetic flux and concentrates the magnetic flux within the region between the rotor and stator. As a result, in operation, an abrupt change in the magnetic flux can be obtained, which leads to an increase in the torque.

REFERENCES:
patent: 4127802 (1978-11-01), Johnson
patent: 4501980 (1985-02-01), Welburn
patent: 4713570 (1987-12-01), Mastromattei
patent: 4936775 (1990-06-01), Mori
patent: 4952859 (1990-08-01), Torisawa et al.
patent: 5289066 (1994-02-01), Clark
patent: 5506458 (1996-04-01), Pace et al.

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