JPS6173534A - Motor - Google Patents

Abstract

PURPOSE:To reduce energy loss, by laminating magnetic plates and forming magnetic wedges. CONSTITUTION:One piece of laminated plates P is punched out, and at the same time, a magnetic plate 3 and a steel plate 4 are formed. And a stator core 2 is formed by laminating the steel plates 4, and at the same time, the magnetic plates 3 are provided with projections 5 for caulking, and the projections 5 are heaped up and are mutually fitted on and are integrally fixed to be laminated. So far as the combination is concerned, slots 6 for four poles of the stator core 2 wound up with coils via insulating substance, and magnetic wedges 1 are press-fitted on sections for the slot openings outside the coils where the magnetic plates 3 are punched out. The magnetic wedges 1 are orga nized by laminating the magnetic plates 3, and so the dimensional precision can be improved, and eddy current loss can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to motors with magnetic wedges.

Structure of a conventional example and its problems FIG. 5 shows a general example of a conventional electric motor stator. That is, @1l is inserted into the slot 32 of the stator core 3) formed by stacking stator iron plates 30 through an insulator.
lj33 is wound. Subsequently, a rod-shaped magnetic wedge 34 is press-fitted into the slot entrance portion 32 of the stator core 3).

However, it is necessary to install the magnetic wedge 34 so that no air gap is created between the magnetic wedge 34 and the stator core 3).
Since it is necessary to prevent deformation of the stator core 3) due to the pressure applied when inserting the magnetic wedge 34, there is a problem in that dimensional accuracy of the press-fitted part is required.6Furthermore, in order to reduce energy loss in the magnetic wedge 34, magnetic Improvements were also required by using materials with low resistance and surface treatment to reduce eddy current loss. Therefore, there was a problem that magnetic wedges could not be made inexpensively.

OBJECTS OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and provide a motor with an inexpensive and high-quality magnetic wedge.

Structure of the Invention The present invention includes an iron core having a slot, a coil wound around the slot, and a magnetic wedge formed by laminating magnetic plates and press-fitted into the slot opening of the iron core. In other words, the dimensional accuracy of the press-fitting part of the magnetic wedge is the same as the dimensional accuracy during the punching process, and it can be easily improved to a high degree of accuracy without creating a gap between the magnetic wedge and the stator core. Deformation of the stator core can be prevented. Further, by laminating layers, eddy current loss can be reduced and quality can be improved.

DESCRIPTION OF THE EMBODIMENTS In FIG. 0, an embodiment of the present invention will be described with reference to FIGS. 1 to 4, where l is a laminated magnetic wedge and 2 is a stator core of a motor stator. For both the stator core 2 and the magnetic wedge 1, a magnetic plate 3 and an iron plate 4 are simultaneously formed by punching out a single laminated plate P as shown in FIG. At the same time, the magnetic plate 3 is provided with caulking protrusions 5, and the protrusions 5 are overlapped and interlocked, and are connected and fixed together as one layer as shown in FIG. In this embodiment, the a-layer manual punch is used to fit the protrusion 5, but a general f4m, pin clamp, band clamp, etc. may be used.

For assembly, insulators (
A coil (not shown) is wound through a coil (not shown), and the magnetic wedge 1 is press-fitted into a punched portion of the magnetic plate 3, which is a slot opening on the outside of the coil. FIG. 4 shows the magnetic path H when the rotor 8 is inserted into the rotation hole 7 of the stator core 2 and the coil is energized.

In this way, since the magnetic wedge 1 is configured to cover the magnetic plate 3, the magnetic plate 3 can be punched out to improve dimensional accuracy, and furthermore, the eddy current loss can be reduced by lamination. In addition, by punching the stator iron plate 4 and the magnetic plate 3 at the same time using the iron plate P, they can be made of the same material, resulting in material savings.
No resizing is required, making the work easier and cheaper.

Effects of the Invention As described above, according to the present invention, since a magnetic wedge is formed by laminating magnetic plates, it is possible to reduce the loss of energy t0 compared to the conventional method, improve quality, and reduce the cost. It has the effect of being able to.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a stator core of an 11-motor stator and its laminated magnetic unicorns according to an embodiment of the present invention, and FIG. 2 is a perspective view of a stator iron plate of a motor stator and a magnetic plate of a laminated magnetic wedge. Figure 3 is a partial cross-sectional view of the magnetic wedge, Figure 4 is a plan view showing the magnetic path in the case of four poles, and Figure 5 is a diagram showing the stator core, bar-shaped magnetic wedge, and windings of a conventional motor stator. FIG. ! ...II! Magnetic wedge, 2... stator core,
3...Magnetic plate of the laminated magnetic wedge 1, 4...Iron plate of the stator core 2, 5...Protrusion for caulking 1 P1 wedge (Fig. 1, Fig. 2, Fig. 3, Fig. 4)

Claims (3)

[Claims] (1) A motor comprising an iron core having a slot, a coil wound around the slot, and a magnetic wedge formed by laminating magnetic plates and press-fitted into the slot opening of the iron core. (2) The motor according to claim (1), wherein the magnetic wedge is formed by laminating magnetic plates integrally with caulking projections. (3) Each magnetic plate of the magnetic wedge is formed by punching an iron plate constituting the iron core.
The motor described in section 1).