JP2000184648A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain low noise without reducing output characteristics by fixing the spaces between neighboring salient poles by means of a non-magnetic adhesive or the like. SOLUTION: A bobbin 14 is attached to a stator 13. A winding material 15 is wound around the bobbin 14 for fabricating a stator assembly 12. A fixing material 17 is charged into clearance 13b between the neighboring salient poles 13a of the stator assembly 12, thereby fixing a plurality of salient poles of the stator 13 to each other. With a non-magnetic adhesive or a resin used as the fixing material 17, non-magnetic solid matter is fixed by means of adhesion or press-inserting. The fixing material 17 may adhere to not only the stator 13 but also the bobbin 14 and the winding material 15, or fill the whole of clearance between the salient poles 13a and between coils 16. It is thus possible to attain a low noise motor without affected by the magnetic characteristics of the layered stator 13, by restricting vibration between the neighboring salient poles 13a of the stator 13, and improve fixing force in a layering direction without deteriorating the characteristics.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating electric machine having a stator having a plurality of inwardly-facing salient poles wound with a coil (for excitation), that is, a motor stator structure.

[0002]

2. Description of the Related Art Conventionally, as a motor of this type, an example of a configuration shown in FIG. 2 has been disclosed. Motor stators are often laminated with thin plates for the purpose of reducing iron loss.
When vibration in an alternating magnetic field caused by an exciting current becomes a problem, the vibration was fixed in a laminating direction by caulking, varnish impregnation, welding, or the like at a large number of locations shown in the configuration example of FIG.

[0003]

However, as is apparent from the configuration example shown in FIG. 2, the salient poles 3a of the stator assembly 2 in which the bobbin 4 is mounted on the stator 3 and the winding material 5 is wound. Peripheral pole 1 of rotor 1 rotating with a small gap
Also in the air gap 3b between the salient poles 3a adjacent to each other via a, the magnetic flux generated by the coil 6 alternates and oscillates.
Also, in fixing in the laminating direction, caulking 3c of the stator 3 is performed.
When the number of locations is increased or when the thin plates are bonded, there is a problem that the output characteristics of the motor deteriorate.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has a low noise level without deteriorating output characteristics by adhering adjacent salient poles with a non-magnetic adhesive or the like. A motor is provided.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a main part showing a hybrid stepping motor according to one embodiment of the present invention. In the figure, 11 is a rotor, 12 is a stator assembly, 13 is a stator, 13a is a plurality of salient poles of the stator, and a coil 16 in which a winding material 15 is wound around a bobbin 14.
Is attached, and 17 is a fixed object that fixes the adjacent 13a.

[0006] The embodiment of the above configuration is assembled as follows. First, the bobbin 14 is mounted on the stator 13, and the winding material 15 is wound around the bobbin 14 to manufacture the stator assembly 12. Next, a gap 13 between adjacent salient poles of the stator assembly 12 is formed.
b is filled with the fixed substance 17.

Here, reference numeral 17 denotes a non-magnetic adhesive or resin, and a non-magnetic solid may be fixed by bonding or press-fitting. Further, it goes without saying that there is no problem even if the member 17 adheres not only to the stator 13 but also to the coil 16, that is, the bobbin 14 or the winding material 15, or fills all the gaps between the salient poles and between the coils.

Although the above configuration example has been described with reference to a hybrid stepping motor, it is apparent that the invention can be applied not only to a motor, that is, an electric motor but also to a generator.

[0009]

As described above, according to the present invention,
The following effects are obtained. That is, the vibration between the salient poles of the adjacent stators is suppressed without affecting the magnetic characteristics of the stacked stators, and a low-noise motor is obtained. At the same time, the fixing force in the laminating direction is improved, so that it is possible to contribute to reducing noise without deteriorating characteristics.

[Brief description of the drawings]

FIG. 1 is a cross-sectional top view of a main part showing an embodiment of the present invention.

FIG. 2 is a cross-sectional top view of a main part showing an example of a conventional configuration.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Rotor 12 Stator assembly 13 Stator 13a Salient pole 13b Space between salient poles 14 Bobbin 15 Winding material 16 Coil 17 Fixed object

Claims (1)

[Claims] 1. A motor comprising a rotor and a stator having a plurality of salient poles, each of which is disposed so as to face an outer peripheral surface of the rotor with a gap therebetween, and each of which is wound with a coil. A motor in which adjacent salient poles are fixed with a non-magnetic material.