Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
1999-10-04
2001-02-13
Nguyen, Tran (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S049030, C310S216006, C310S256000
Reexamination Certificate
active
06188159
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a stator, and more particularly to an improved structure of stator for use in a electro-motor or dynamo.
FIG. 20
shows a stator for use in a electro-motor or dynamo. This structure of stator
80
is comprised of a metal core consisting of a stack of metal plates
81
of thickness about within 0.35 mm~0.5 mm. Each metal plate
81
comprises a plurality of teeth
82
and a plurality of inside notches
83
alternatively arranged on the inside around the circular center opening thereof. This structure of stator
80
wastes lots of metal plate material (the portions at the inside notches
83
and center portion
84
), and requires special machines, such as winding machine, shaping machine, and binding machine, etc. for winding the windings on the metal plates
81
. When increasing the number of poles (N poles and S poles), the wire winding procedure becomes complicated, and the number of turns of the windings is accordingly reduced.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide a stator, which can be alternatively arranged to fit different design requirements. It is another object of the present invention to provide a stator, which is easy and cost less to manufacture. It is still another object of the present invention to provide a stator, which has independent stator units for easy installation of the windings separately, enabling the windings to be wound round each stator unit in a saturated manner, so as to improve the strength of magnetic field. It is still another object of the present invention to provide a stator, which has multiple stator units arranged at different layers, so that the number of poles (N poles and S poles) can easily be increased without reducing the number of turns of the windings by arranging the stator units in such a manner that a difference of elevation exists in the direction of the longitudinal axis between the stators at each two adjacent layers.
According to the present invention, the stator is comprised of a plurality of stator units. Each stator unit is comprised of a column and winding means wound round the column. The column comprises a first end section, a second end section, and a middle section. The first end section and the second end section are formed integral with two distal ends of the middle section, and turned toward an inner side of the column. The stator units are arranged around a central axis on which the rotor is rotated. The stator units are independent members. The windings are respectively wound round the column of each stator unit. According to different alternate forms of the present invention, the longitudinal axis of each stator can be arranged in parallel or perpendicular to the central axis, or at an angle relative to the central axis. The stator units can be arranged on a plane around the central axis. Alternatively, the stator units can be arranged at different layers and spaced along the central axis, such that a difference of elevation exists between the stators at each two adjacent layers.
REFERENCES:
patent: 1255607 (1918-02-01), Hensley
patent: 3983435 (1976-09-01), Sims
patent: 4249099 (1981-02-01), Bhongbhibhat et al.
patent: 4255684 (1981-03-01), Mischler et al.
patent: 5051637 (1991-09-01), Harris et al.
patent: 5365137 (1994-11-01), Richardson et al.
patent: 5962938 (1999-10-01), Bobay et al.
patent: 5994814 (1999-11-01), Kawabata et al.
Bacon & Thomas
Nguyen Tran
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