Stator structure for miniaturized DC brushless motor

Details Stator structure for miniaturized DC brushless motor Stator structure for miniaturized DC brushless motor

1997-06-17

1999-06-29

Enad, Elvin G.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 40MM, 310 49R, 310 67R, 310 68R, 310258, 310259, H02K 700, H02K 112

Patent

active

059172622

ABSTRACT:
A stator structure for miniaturized DC brushless motor is disclosed. It contains: (a) a ring coil having an axially extending hole; (b) a first stator-pole piece having an axially extending hole on which a first protruded tubular piece is formed, the first stator-pole piece being axially coupled to the coil ring by inserting the first protruded tubular piece into the axially extending hole of the ring coil; (c) a second stator-pole piece having an axially extending hole on which a second protruded tubular piece is formed, the second stator-pole piece being axially coupled to the ring coil by inserting the second protruded tubular piece into the axially extending hole of the ring coil opposite to the first protruded tubular piece on the stator-pole piece, wherein the first and second protruded tubular pieces have same diameter and come into tight contact to form one interface therebetween; and (d) a bearing penetrating successively through the axially extending hole of the first stator-pole piece and the axially extending hole of the ring coil to be axially coupled to the second protruded tubular piece on the second stator-pole piece. The one-gap construction simplifies the parts requirement and reduces the manufacturing cost.

REFERENCES:
patent: 4642496 (1987-02-01), Kerviel et al.
patent: 4672247 (1987-06-01), Madsen et al.
patent: 4965476 (1990-10-01), Lin
patent: 5093599 (1992-03-01), Horng
patent: 5679997 (1997-10-01), Matsuzawa et al.

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