JP2001057750A - Permanent magnet type electric rotating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate fitting miss of a 100% permanent magnet perfectly by fitting permanent magnets having an identical shape corresponding to that of holes made in a rotor core at such positions as the axial side and the outer side having different shapes are arranged alternately. SOLUTION: Holes 6A, 6B and 6C having different shape on the axial side 6A1 and the outer side 6A2 of a permanent magnet 1 are made in a core plate 6 in correspondence with the N or S pole of the permanent magnets 1 arranged on the outer circumference of a rotor while alternating the direction of polarity. The permanent magnets 1 have an identical shape corresponding to that of the holes 6A, 6B and 6C made in the rotor core 2 and the permanent magnets 1 are fitted at such positions as the axial side 6A1 and the outer side 6A2 having different shapes are arranged alternately. According to the arrangement, the 100% permanent magnet 1 can be fitted in the rotor core 2 while eliminating fitting miss perfectly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor for a rotating electric machine having a permanent magnet, and more particularly to a permanent magnet for preventing a wrong polarity from being fitted when a permanent magnet is fitted to a rotor core. The present invention relates to a rotary electric machine.

[0002]

2. Description of the Related Art FIG. 4 is an explanatory view showing an example of a conventional rotor, wherein 21 is a permanent magnet, 22 is a rotor core having a laminated core plate, 23 is a shaft, 24 is a vent, and a cross section is shown. The trapezoidal permanent magnets 21 are alternately arranged on the outer periphery of the rotor core 22 with different polarities. FIG. 5 is an explanatory view showing two examples of a conventional rotor. Reference numeral 31 denotes a permanent magnet having a rectangular cross section, 32 denotes a rotor core, and 33 denotes a shaft.
Are fitted to the rotor core 32.

[0003]

However, such a configuration has the following problems. Adjacent permanent magnets must all have the same shape. Therefore, as shown in FIG. 4, the lower bottom side of the permanent magnet 21A and the N pole of the upper bottom side are compared with those of the lower bottom N pole and the upper bottom side of the permanent magnet 21B. If so, the shapes are exactly the same.

For this reason, it is necessary to fit a permanent magnet 21C having the same polarity as that of the permanent magnet 21A.
1B may be fitted with the same polarity. Pulling out the once fitted thing is a difficult task because the attractive force between the permanent magnet and the rotor core is too strong. This is not preferable in practical use, such as damaging holes in the iron core and causing magnetic flux leakage. Further, such a phenomenon is caused by the permanent magnets 31A and 31A shown in FIG.
The same was true for 1B. SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide a permanent magnet type rotating electric machine that solves these problems and does not cause a mistake in fitting a 100% permanent magnet. It is in.

[0005]

In order to achieve the above object, the present invention provides a rotating electric machine having a plurality of permanent magnets radially provided inside a rotor core formed by laminating core plates. The radial holes formed in the rotor core correspond to the N poles or S poles of the permanent magnets which are alternately arranged on the outer circumference of the rotor with different polarities. The shaft core side and the outside are bored in different shapes, the shape of the permanent magnet is the same shape corresponding to the hole formed in the rotor core, and the shaft core side and the outside are alternately arranged in different shapes. A permanent magnet type rotating electric machine characterized in that the permanent magnets are fitted to the locations described above.

According to a second aspect of the present invention, the radial hole is formed in a rectangular shape, and the hole is chamfered on the N pole side of the permanent magnet and not chamfered on the S pole side, or the N pole side of the permanent magnet is chamfered. The permanent magnet type rotating electric machine according to claim 1, wherein the S pole side is chamfered, and a shape chamfered on the outer peripheral side of the rotor and a shape not chamfered are alternately arranged. Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0007]

FIG. 1 is an overall configuration diagram showing one embodiment of the present invention, FIG. 2 is a plan view of a core plate showing one embodiment of the present invention, and FIG. 3 is a perspective view of a permanent magnet. 1 to 3, reference numeral 1 denotes a permanent magnet, 2 denotes a rotor core having a laminated core plate 6, 3 denotes an axis, 4 denotes an air hole, 5 denotes a core holder, and a rotor core formed by laminating a core plate 6. In a rotating electric machine having a plurality of permanent magnets 1 radially in the inside thereof, radial holes formed in a rotor core 2, that is, holes 6 in a core plate 6 shown in FIG.
A, 6B and 6C correspond to the N pole or the S pole of the permanent magnets which are alternately arranged on the outer periphery of the rotor with different polarity directions, and correspond to the shaft core side 6A1 and the outer side 6A2 of the permanent magnet 1. Are formed in different shapes, and the shape of the permanent magnet 1 is the same shape corresponding to the holes 6A, 6B, 6C formed in the rotor core 2, and the shaft core side 6A1 and the outer side 6A2 alternately have different shapes. A permanent magnet type rotating electric machine characterized in that a permanent magnet 1 is fitted to a place where the permanent magnet is provided.

That is, as shown in FIG. 2, the radial holes 6A, 6B and 6C are formed in a substantially rectangular shape. The holes 6A, 6B, and 6C are chamfered on the N pole side 1A of the permanent magnet 1 and are not chamfered on the S pole side 1B, as shown in FIG. In some cases, the N pole side of the permanent magnet 1 is not chamfered, but the S pole side is chamfered.

As shown in FIG. 2, a chamfered hole 6A is formed on the outer peripheral side of the rotor core 2 thus formed.
And holes 6B having a non-chamfered shape are arranged alternately, and the permanent magnet 1 shown in FIG. 3 can be fitted into these holes 6A and 6B. In the present embodiment, the distinction between the N pole side and the S pole side is made by chamfering. However, the present invention is not limited to this. Good.

[0010]

As described above, according to the present invention, since there is no possibility of fitting with the wrong polarity, there is no need to pull out the inserted product, which causes the permanent magnet to crack or rotate. It is eliminated from damaging the hole of the iron core, and is extremely useful in practice.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 is a plan view of a core plate showing one embodiment of the present invention.

FIG. 3 is a perspective view of a permanent magnet.

FIG. 4 is an explanatory view showing an example of a conventional rotor.

FIG. 5 is an explanatory view showing two examples of a conventional rotor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Permanent magnet 1A N pole side 1B S pole side 2 Rotor core 3 Axis 4 Air hole 5 Iron core holding 6 Core plate 6A, 6B, 6C hole 6A1 Shaft core side 6A2 Outside 21 Permanent magnet 22 Rotor core 24 Air hole 31 Permanent Magnet 32 Rotor core 33 axis

Claims (2)

[Claims] In a rotating electric machine having a plurality of permanent magnets radially provided inside a rotor core formed by laminating a core plate, radial holes formed in the rotor core have polarities on the outer periphery of the rotor. N of permanent magnets alternately arranged in different directions
The permanent magnet has a same shape corresponding to a hole formed in the rotor core, and the permanent magnet has a same shape corresponding to a hole formed in the rotor core. A permanent magnet type rotating electric machine characterized in that the permanent magnet is fitted at a position where shapes having different sides and outsides are alternately arranged. 2. The radial hole is formed in a rectangular shape, and the hole is chamfered on the N pole side of the permanent magnet and is not chamfered on the S pole side, or the N pole side of the permanent magnet is not chamfered. The permanent magnet type rotating electric machine according to claim 1, wherein the pole side is chamfered, and a shape chamfered on an outer peripheral side of the rotor and a shape not chamfered are alternately arranged.