JP2003088058A - Magnetizing equipment of permanent magnet rotor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain magnetizing equipment wherein magnetizing efficiency can be improved. SOLUTION: This magnetizing equipment of a permanent magnet rotor is provided with a cylindrical magnetic member which is arranged so as to surround a rotor 1 having a plurality of permanent magnets which are not yet magnetized and arranged in the circumference direction interposing specified gaps on an outer peripheral surface, and coils which are wound at positions corresponding to the permanent magnets of the cylindrical magnetic member, and the permanent magnets which are not yet magnetized are magnetized by making a current flow in the coils. In the equipment, the cylindrical magnetic member is divided into the circumference direction, and a plurality of divided cylindrical magnetic members 4, 5, 6 and 7 are formed, which are arranged movably in the radius direction of the rotor 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent magnet rotor magnetizing device for forming a permanent magnet rotor by magnetizing an unmagnetized permanent magnet arranged on the outer peripheral surface of the rotor.

[0002]

2. Description of the Related Art Conventionally, in a permanent magnet rotor, an unmagnetized permanent magnet is magnetized and then assembled on the outer peripheral surface of the rotor, and an unmagnetized permanent magnet is assembled on the outer peripheral surface of the rotor. After that, it may be magnetized. However, when the magnet is magnetized and then assembled to the rotor, a strong attractive force acts and the assembly work becomes difficult. Therefore, it is common to magnetize the large rotor after assembling it to the rotor. Target.

As a conventional magnetizing device for a permanent magnet rotor of this kind, a cylindrical magnetized core is arranged around the rotor (not shown) as shown in, for example, Japanese Patent Application Laid-Open No. 9-163692. At the same time, the coils of the rotor of the magnetized iron core are wound at positions corresponding to the respective non-magnetized permanent magnets, and a current is passed through these coils to magnetize the respective non-magnetized permanent magnets. Is disclosed.

[0004]

The conventional magnetizing device for the permanent magnet rotor is constructed as described above, and the rotor is mounted inside the cylindrical magnetized iron core to perform the magnetization. Therefore, in order to improve the magnetizing efficiency, it is desirable to make the gap formed between the inner peripheral surface of the magnetized iron core and the rotor, which serves as the magnetic resistance, as small as possible, and bring the coil close to the surface of the rotor. However, in consideration of workability when the rotor is attached to the magnetized iron core, this gap needs to have a certain size, which makes it difficult to obtain a desired small gap. .

The present invention has been made in order to solve the above problems, and is a permanent magnet rotating device capable of obtaining a desired small gap without deteriorating workability when mounting a rotor. An object of the present invention is to provide a child magnetizing device.

[0006]

A magnetizing device for a permanent magnet rotor according to claim 1 of the present invention has a plurality of unmagnetized permanent magnets arranged on the outer peripheral surface at predetermined intervals in the circumferential direction. A cylindrical magnetic member arranged so as to surround the rotor, and a coil wound at a position corresponding to the unmagnetized permanent magnet of the cylindrical magnetic member, and the unmagnetized permanent magnet is energized by energizing the coil. In a permanent magnet rotor magnetizing device configured to magnetize a plurality of divided cylindrical magnetic members by dividing the cylindrical magnetic member in the circumferential direction into a plurality of divided cylindrical magnetic members, It is arranged so as to be movable in the radial direction.

Further, the magnetizing device for a permanent magnet rotor according to a second aspect of the present invention is such that, in the first aspect, the divided cylindrical magnetic member is divided at a position coinciding with the center line of the unmagnetized permanent magnet. It was done.

Further, a magnetizing device for a permanent magnet rotor according to a third aspect of the present invention is the magnetizing device according to the first aspect, wherein the divided cylindrical magnetic member is aligned with the center line of at least every other unmagnetized permanent magnet. It is designed to be divided by.

Further, a magnetizing device for a permanent magnet rotor according to a fourth aspect of the present invention is the magnetizing device according to the third aspect, wherein each coil is divided between adjacent center lines of unmagnetized permanent magnets of cylindrical magnetic members. It is adapted to be wound between grooves formed along the axial direction at positions on the inner peripheral surface corresponding to the bisector line.

The magnetizing device for a permanent magnet rotor according to claim 5 of the present invention is the magnetizing device for a permanent magnet rotor according to claim 2 or 3, wherein each coil has a center between adjacent unmagnetized permanent magnets of each divided cylindrical magnetic member. Among the lines corresponding to the line that bisects the line, the lines are wound between the grooves formed along the axial direction at the position of the outer peripheral surface.

According to a sixth aspect of the present invention, in the magnetizing device for a permanent magnet rotor according to the fifth aspect, a plurality of grooves on the outer peripheral surface side are formed at predetermined intervals in the circumferential direction. It was done.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1. 1 is a perspective view showing a structure of a magnetizing device for a permanent magnet rotor according to Embodiment 1 of the present invention in a state where a rotor is mounted, and FIG. 2 shows a divided cylindrical magnetic member of the magnetizing device in FIG. FIG. 3 is a plan view showing the structure, FIG. 3 is a plan view showing a state in which a coil is wound around the divided cylindrical magnetic member in FIG. 2, and FIGS. It is a perspective view shown.

In the figure, reference numeral 1 denotes a rotor having a plurality of unmagnetized permanent magnets 2 arranged on the outer peripheral surface in the circumferential direction at predetermined intervals, and 3 denotes every other unmagnetized permanent magnet of the rotor 1. A plurality of divided cylindrical magnetic members 4, 5, 6, which are divided at a position corresponding to the center line of 2 (shown by the one-dot chain line in FIG. 2).
In the magnetized iron core constituted by 7, the center lines of the unmagnetized permanent magnets 2 adjacent to each other of the divided cylindrical magnetic members 4, 5, 6, 7 are equally divided into two. Grooves 4a, 5a, 6a, 7a extending in the axial direction are formed at positions on the inner peripheral surface corresponding to the line (indicated by a chain double-dashed line in FIG. 2). 8 is a coil wound between the grooves 4a-4a, 5a-5a, 6a-6a and 7a-7a of the divided cylindrical magnetic members 4, 5, 6 and 7, respectively, 9 is a base plate, and 10 is this. Radially arranged on the base plate 9, each divided cylindrical magnetic member 4,
It is a plurality of guide rails that move and guide 5, 6, and 7 in the radial direction of the rotor 1.

Next, the operation of the magnetizing device for the permanent magnet rotor according to the first embodiment having the above-described structure will be described with reference to the drawings. Normally, the magnetized iron core 3 is usually arranged so that the divided cylindrical magnetic members 4, 5, 6, 7 are cylindrical as shown in FIG. Then, when the rotor 1 is mounted, as shown in FIG. 5, the divided cylindrical magnetic members 4, 5,
6 and 7 are moved along each guide rail 10 in the radial direction indicated by the arrow in the figure. Next, as shown in FIG. 6, the rotor 1 is inserted in the direction shown by the arrow in the drawing, and is placed at a predetermined position inside each of the divided cylindrical magnetic members 4, 5, 6, 7 as shown in FIG. . And finally, each divided cylindrical magnetic member 4,
Contrary to the above, by moving 5, 6, and 7 inward along each guide rail 10 to bring them to the state shown in FIG. 1, the rotor 1 is mounted in the magnetized core 3, and each coil is By applying currents in the same direction to each of the coils 8, magnetic flux in the direction indicated by the arrow in FIG. 3 is generated, and the unmagnetized permanent magnets 2 at the positions corresponding to the coils 8 respectively have the corresponding coils 8. Due to the total magnetic flux, each unmagnetized permanent magnet 2 at an intermediate position between the adjacent coils 8 has a half of each adjacent coil 8.
Each magnetic flux is magnetized to complete the permanent magnet rotor.

As described above, according to the first embodiment, the magnetized iron core 3 can be moved in the radial direction of the rotor 1 via the guide rails 10, and the divided cylindrical magnetic members 4, 5, 6, 7 can be obtained. When the rotor 1 is inserted, the divided cylindrical magnetic members 4, 5, 6, 7 are moved outward, that is, in the radial direction,
At the time of mounting, the divided cylindrical magnetic members 4, 5, 6, 7 are moved inward to surround the rotor 1, so that the mounting of the rotor 1 is facilitated and the workability is improved. And the divided cylindrical magnetic members 4, 5,
Since the inner surfaces of 6 and 7 can be brought into contact with the surfaces of the respective unmagnetized permanent magnets 2 of the rotor 1, the magnetizing efficiency can be improved.

Further, each divided cylindrical magnetic member 4, 5, 6, 7
Is divided at a position coinciding with the center line of every other unmagnetized permanent magnet 2 of the rotor 1.
Each groove 4a-4a, 5a-5a, 6a-6a,
7a-7a are the same divided cylindrical magnetic members 4, 5,
Since the coil 8 can be formed in the grooves 6 and 7, the coil 8 can be easily wound, the assembling property can be improved, and the grooves 4a, 5a, 6a, and 7a can be formed adjacent to each other without being magnetized. Since the center lines of the magnets 2 are equally divided into two lines and the corresponding inner circumferential surfaces of the divided cylindrical magnetic members 4, 5, 6, 7 are formed along the axial direction, The wound coil 8 can be brought closer to the surface side of the unmagnetized permanent magnet 2 of the rotor 1, and the magnetizing efficiency can be further improved.

Embodiment 2. 8 is a plan view showing a state in which a coil is wound around a magnetized iron core of a magnetizing device for a permanent magnet rotor according to Embodiment 2 of the present invention, and FIG. 9 is a permanent magnet rotor according to Embodiment 2 of the present invention. 9 is a plan view showing a state in which a coil is wound around a magnetized iron core different from that of FIG.

In the figure, the same parts as those in the first embodiment described above are designated by the same reference numerals, and the description thereof will be omitted. Reference numeral 11 is a position that coincides with the center line (indicated by a chain line in FIG. 8) of each unmagnetized permanent magnet 2 of the rotor 1, and is a plurality of divided cylindrical magnetic members 12, 13, 14, 15, 16, 17, 1
In the magnetized core constituted by 8 and 19, a line that bisects the center line (shown by a chain line in FIG. 8) of the unmagnetized permanent magnets 2 adjacent to each other of the divided cylindrical magnetic members 12 to 19 ( Figure 8
Grooves 12a to 19a and 12b to 19b that extend in the axial direction are formed at positions on the outer peripheral surface corresponding to (indicated by the two-dot chain line).

Reference numeral 20 denotes a pair of grooves 12a-1 formed on the outer peripheral surface of each of the divided cylindrical magnetic members 12a to 19a.
2b, 13a-13b, 14a-14b, 15a-15
b, 16a-16b, 17a-17b, 18a-18
It is a coil wound between b and 19a-19b. Although not shown, as in the first embodiment, each of the divided cylindrical magnetic members 12 to 19 is guided by a plurality of guide rails radially arranged on the base plate, and the radius of the rotor 1 is increased. Is configured to move in a direction.

As described above, according to the second embodiment, the magnetized iron core 11 is composed of the plurality of divided cylindrical magnetic members 12 to 19 which are divided at the positions corresponding to the center lines of the respective unmagnetized permanent magnets 2. However, the distance between the center lines of the adjacent unmagnetized permanent magnets 2 of each of the divided cylindrical magnetic members 12 to 19 is 2
A pair of grooves 12a-12b, 1 formed along the axial direction at positions on the outer peripheral surface corresponding to the equally dividing line, respectively.
3a-13b, 14a-14b, 15a-15b, 16
a-16b, 17a-17b, 18a-18b, 19a
The coils 20 are wound between −19b, and currents in different directions are alternately applied to the coils 20 to generate magnetic flux in the direction indicated by an arrow in FIG. Since each unmagnetized permanent magnet 2 is magnetized by a magnetic flux of 1/2 of each of the coils 20 adjacent to each other, the degree of magnetization of each unmagnetized permanent magnet 2 depends on which unmagnetized permanent magnet. Since the same applies to the magnet 2 and is averaged, reliability can be improved.

Further, each divided cylindrical magnetic member 12 to 19
Of the pair of grooves 12a-12b, 13a formed along the axial direction at the position of the outer peripheral surface corresponding to the line that bisects the center lines of the adjacent unmagnetized permanent magnets 2 from each other.
-13b, 14a-14b, 15a-15b, 16a-
16b, 17a-17b, 18a-18b, 19a-1
Of the grooves 9b, a plurality of grooves 12b to 19b on the outer peripheral surface side are provided as shown in FIG.
The coil 8 may be wound between each of the plurality of grooves 12b on the outer peripheral surface side and the plurality of grooves 12b on the outer peripheral surface side. The magnetic flux generated in the coil 2 is distributed in each groove 12.
Since it flows so as to surround all of 0, the path of the magnetic flux is lengthened and the magnetic path resistance is increased, so that the magnetic flux leaking to the outer peripheral side is reduced and the magnetization efficiency can be improved.

Embodiment 3. 10 is a plan view showing a state in which a coil is wound around a magnetized iron core of a magnetizing device for a permanent magnet rotor according to Embodiment 3 of the present invention, and FIG. 11 is a permanent magnet rotor according to Embodiment 3 of the present invention. 11 is a plan view showing a state in which a coil is wound around a magnetized iron core different from that of FIG. In the figure, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

Reference numeral 21 denotes a magnetized iron core, which is composed of a plurality of divided cylindrical magnetic members 4 to 7 similar to those in the first embodiment, and has grooves 4a to 7a formed on the inner peripheral surfaces thereof. Grooves 4b to 7b are also formed at the corresponding positions on the outer peripheral surface side. And a pair of each groove | channel 4a-4b, 5a respectively formed in each inner side and the outer peripheral surface side.
A coil 20 similar to that in the second embodiment is wound between -5b, 6a-6b, and 7a-7b.

As described above, according to the third embodiment, a pair of grooves 4a-4b, 5a-5b, 6a- respectively formed on the outer peripheral surface of each of the divided cylindrical magnetic members 4 to 7.
Since the coil 20 is wound between 6b and 7a-7b, the relative positional relationship between each magnetized permanent magnet (not shown) and each coil 20 is the same as in the second embodiment. Since the same is true at any position, the degree of magnetization of each unmagnetized permanent magnet (not shown) is the same at any position and averaged, so that reliability can be improved.

Of the pair of grooves 4a-4b, 5a-5b, 6a-6b, 7a-7b formed along the axial direction on the inner and outer peripheral surfaces of the divided cylindrical magnetic members 4 to 7, respectively. , A plurality of grooves 4b to 7b on the outer peripheral surface side are provided as shown in FIG. 11, and are wound, for example, between the groove 4a on the inner peripheral surface side and each of the plurality of grooves 4b on the outer peripheral surface side. However, as in the second embodiment, the magnetic flux leaking on the outer peripheral side can be reduced to improve the magnetization efficiency.

[0026]

As described above, according to the first aspect of the present invention, the rotor having the plurality of unmagnetized permanent magnets arranged on the outer peripheral surface at a predetermined interval in the circumferential direction is surrounded. A cylindrical magnetic member provided, and a coil wound around the cylindrical magnetic member at a position corresponding to the unmagnetized permanent magnet,
In a magnetizing device for a permanent magnet rotor that magnetizes an unmagnetized permanent magnet by energizing a coil, a cylindrical magnetic member is circumferentially divided to form a plurality of divided cylindrical magnetic members, Since each divided cylindrical magnetic member is arranged so as to be movable in the radial direction of the rotor, a desired small gap can be obtained without lowering workability when mounting the rotor, and the magnetizing efficiency can be improved. It is possible to provide a magnetizing device for a permanent magnet rotor that can be improved.

According to a second aspect of the present invention, in the first aspect, the divided cylindrical magnetic member is divided at a position coinciding with the center line of the unmagnetized permanent magnet, so that the magnetization efficiency is improved. It is possible to provide a magnetizing device for a permanent magnet rotor capable of achieving the above.

According to a third aspect of the present invention, in the first aspect, the split cylindrical magnetic member is split at a position coinciding with the center line of at least one unmagnetized permanent magnet. It is possible to provide a magnetizing device for a permanent magnet rotor, which can improve not only the magnetizing efficiency but also the assembling property.

According to a fourth aspect of the present invention, in the third aspect, each coil corresponds to a line that bisects the center lines of adjacent unmagnetized permanent magnets of the divided cylindrical magnetic member. A magnetizing device for a permanent magnet rotor capable of further improving the magnetizing efficiency, since the magnets are wound between grooves formed along the axial direction at the position of the inner peripheral surface. You can

Further, according to claim 5 of the present invention, in claim 2 or 3, each coil is a line that divides the center line between adjacent unmagnetized permanent magnets of each divided cylindrical magnetic member into two equal parts. In correspondence with the above, since it was configured to be wound between the grooves formed respectively along the axial direction at the position of the outer peripheral surface,
A magnetizing device for a permanent magnet rotor capable of improving reliability can be provided.

According to a sixth aspect of the present invention, in the fifth aspect, the plurality of grooves on the outer peripheral surface side are formed at predetermined intervals in the circumferential direction, so that the reliability is improved. Of course, it is possible to provide a magnetizing device for a permanent magnet rotor that can improve the magnetizing efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure of a magnetizing device for a permanent magnet rotor according to a first embodiment of the present invention in a state where a rotor is mounted.

FIG. 2 is a plan view showing a configuration of a divided cylindrical magnetic member of the magnetizing device in FIG.

FIG. 3 is a plan view showing a state in which a coil is wound around the divided cylindrical magnetic member in FIG.

FIG. 4 is a perspective view showing one step of a rotor mounting operation of the magnetizing device in FIG.

5 is a perspective view showing a step subsequent to the step shown in FIG. 4 of the rotor mounting work of the magnetizing device in FIG.

6 is a perspective view showing a step subsequent to the step shown in FIG. 5 of the rotor mounting work of the magnetizing device in FIG.

7 is a perspective view showing a step subsequent to the step shown in FIG. 6 of the rotor mounting work of the magnetizing device in FIG.

FIG. 8 is a plan view showing a state in which a coil is wound around a magnetized iron core of a magnetizing device for a permanent magnet rotor according to a second embodiment of the present invention.

FIG. 9 is a plan view showing a state in which a coil is wound around a magnetized iron core different from that of FIG. 8 of the magnetizing device for a permanent magnet rotor according to the second embodiment of the present invention.

FIG. 10 is a plan view showing a state in which a coil is wound around a magnetized iron core of a magnetizing device for a permanent magnet rotor according to a third embodiment of the present invention.

FIG. 11 is a plan view showing a state in which a coil is wound around a magnetized iron core different from that of FIG. 10 of the magnetizing device for a permanent magnet rotor according to the third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 rotor, 2 unmagnetized permanent magnets, 3, 11, 21 magnetized cores, 4-7, 12-19 split cylindrical magnetic members, 4
a to 7a, 4b to 7b, 12a to 19a, 12b to 19
b groove, 8, 20 coil, 9 base plate, 10 guide rail.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takashi Miyazaki             2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo             Inside Ryo Electric Co., Ltd. (72) Inventor Shiro Tatsumi             2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo             Inside Ryo Electric Co., Ltd. (72) Inventor Yuji Nakahara             2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo             Inside Ryo Electric Co., Ltd. F-term (reference) 5H622 AA03 QB01 QB08 QB09 QB10

Claims (6)

[Claims] 1. A cylindrical magnetic member disposed so as to surround a rotor having a plurality of unmagnetized permanent magnets arranged on the outer peripheral surface at predetermined intervals in the circumferential direction, and the cylindrical magnetic member. Of the unmagnetized permanent magnet and a coil wound at a position corresponding to the unmagnetized permanent magnet, wherein the unmagnetized permanent magnet is magnetized by energizing the coil. A permanent magnet characterized in that a cylindrical magnetic member is divided in the circumferential direction to form a plurality of divided cylindrical magnetic members, and each of the divided cylindrical magnetic members is arranged so as to be movable in the radial direction of the rotor. Magnet rotor magnetizing device. 2. The magnetizing device for a permanent magnet rotor according to claim 1, wherein the divided cylindrical magnetic member is divided at a position coinciding with a center line of the unmagnetized permanent magnet. 3. The magnetizing device for a permanent magnet rotor according to claim 1, wherein the divided cylindrical magnetic member is divided at a position that coincides with a center line of at least one unmagnetized permanent magnet. . 4. Each of the coils is a groove formed along the axial direction at a position of an inner peripheral surface corresponding to a line that bisects a center line between adjacent unmagnetized permanent magnets of a divided cylindrical magnetic member. The magnetizing device for a permanent magnet rotor according to claim 3, wherein the magnetizing device is wound between them. 5. Each coil is formed along the axial direction at a position on the outer peripheral surface corresponding to a line that bisects the center lines of adjacent unmagnetized permanent magnets of the divided cylindrical magnetic members. The magnetizing device for a permanent magnet rotor according to claim 2 or 3, wherein each magnet is wound between the formed grooves. 6. The magnetizing device for a permanent magnet rotor according to claim 5, wherein a plurality of grooves on the outer peripheral surface side are formed at predetermined intervals in the circumferential direction.