JPH07163072A - Generator motor with permanent magnet serving as rotor - Google Patents

Abstract

PURPOSE:To attain ensuring mechanical strength of a rotor without reducing an output of a permanent magnet by constituting the rotor of the permanent magnet divided circumferentially, reinforcing the rotor by bands arranged in a peripheral direction of the permanent magnet, and constituting the rotor so as to prevent a clearance between a stator and the rotor from increasing by the bands. CONSTITUTION:A groove 19 partly extended in the peripheral direction is formed in a peripheral surface of permanent magnets 9 by which a rotor is constituted, to press fit a magnetic path member 4 between the rotary shaft and the permanent magnets 9, and non-magnetic bands 8 are fitted into the groove 19 formed in time permanent magnets 9. In this way, the rotor can be reinforced, and its mechanical strength can be improved, to prevent the permanent magnet from being damaged even when centrifugal force acts by rotating the rotor at a high speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a generator / motor having a permanent magnet as a rotor.

[0002]

2. Description of the Related Art Conventionally, a generator or an electric motor using a permanent magnet as a rotor can extremely effectively increase the output because of the high magnetic flux density of the permanent magnet, and has a simple structure. Recently, it has been widely used in industrial equipment. However, since the mechanical strength of the permanent magnet is not high, when the rotor is composed of only the permanent magnet, there is a problem that the permanent magnet is damaged as the rotation of the rotor increases. Therefore, in the generator, in order to reinforce the mechanical strength of the permanent magnet, it is necessary to reinforce the outer periphery of the permanent magnet. In particular, when a rotor in a generator is divided and permanent magnets with a fan-shaped cross section are used as its poles, unless the permanent magnets are sequentially arranged in the circumferential direction and assembled together, they function as a ring-shaped rotor. I can't.

Conventionally, a rotating electric machine disclosed in Japanese Utility Model Laid-Open No. 60-162977 has a centrifugal governor which can change the magnetic flux density of a magnetic circuit formed by a permanent magnet on a rotatable support shaft according to the number of revolutions. It has a magnetic flux density variable mechanism provided, and the permanent magnets are joined in a state of being surrounded by a reinforcing plate.

Further, the AC generator disclosed in Japanese Patent Laid-Open No. 3-251067 discloses a boss portion provided on the outer periphery of a shaft, a pair of protrusions extending from the both ends of the boss portion in the outer peripheral direction, and the protrusion. A rotor having a plurality of claw-shaped magnetic pole portions extending in the axial direction from the outer periphery of the rotor, a stator having a stator winding arranged on the outer periphery of the rotor, a field winding wound on the outer periphery of the boss portion, The permanent magnet is provided so as to abut the projecting portion so that the magnetic flux flows in the same direction as the direction of the magnetic flux flowing in the projecting portion when a current is applied to the field winding.

Further, in Japanese Patent Laid-Open No. 62-272850, a permanent magnet is arranged in the rotor, and a magnetic pole piece is formed to guide the movable magnetic body in the radial direction by the rotation of the rotor in which the movable magnetic body is enclosed. A permanent magnet type rotating machine in which a container for use is provided in a rotor is disclosed.

Further, Japanese Patent Laid-Open No. 3-265451 discloses a power generator. The power generator includes a field winding,
Rotor with a magnetic flux that is generated in the field winding by passing a permanent magnet and current and a magnetic pole that allows the magnetic flux of the permanent magnet to flow, and is placed in opposition to the rotor. A stator having an armature winding that generates a magnetic field and a suppressing unit that controls the output generated in the armature winding of the stator by the magnetic flux of the permanent magnet of the rotor.

[0007]

[Problems to be Solved by the Invention]
In the electric motor, in order to reinforce the mechanical strength of the permanent magnet, when reinforcing the outer periphery of the permanent magnet, a cylindrical body made of a non-magnetic material such as stainless steel, ceramics or carbon fiber is used. There is a method to reinforce the outside, but since these reinforcements form a cylindrical body, a certain amount of thickness is required, and if the entire outer surface of the permanent magnet is covered, the gap between the stator and the rotor will become a cylindrical body. Therefore, the magnetic flux density becomes large, the magnetic flux density becomes extremely small, and high output cannot be obtained.

Therefore, an object of the present invention is to solve the above-mentioned problems, and the rotor is constituted by circumferentially divided permanent magnets, and the rotor is reinforced by a band arranged in the circumferential direction of the permanent magnets. Then, the band is configured so that the gap between the stator and the rotor does not become large, or the rotor is reinforced by a reinforcing ring composed of a magnetically permeable member and a low magnetically permeable member in addition to the band. To provide a generator / motor using a permanent magnet as a rotor, which can secure the mechanical strength of the rotor without reducing the output of the permanent magnet by arranging the portion of the magnetic member in a portion corresponding to the permanent magnet. Is.

[0009]

In order to achieve the above object, the present invention is configured as follows. That is,
The present invention relates to a rotor having a rotary shaft rotatably supported by a housing, a rotor provided with a plurality of permanent magnets circumferentially separated by a non-magnetic material fixed to the rotary shaft, and an outer circumference of the rotor. In a generator / motor having a rotor, which is a permanent magnet having a stator that is fixed to the housing and has a winding wound around it with a gap, in a circumferential direction that is partially formed on the outer peripheral surface of the permanent magnet. A groove extending, a magnetic path member press-fitted between the rotary shaft and the permanent magnet, and a non-magnetic band fitted in the groove formed in the permanent magnet to reinforce the rotor. The present invention relates to a generator / motor having a permanent magnet as a rotor. The non-magnetic band is made of an aluminum alloy, a titanium alloy, or a copper alloy.

Alternatively, according to the present invention, a rotating shaft rotatably supported by a housing, a rotor having a plurality of permanent magnets circumferentially separated by a non-magnetic material fixed to the rotating shaft, and a rotor. In a generator / motor that uses as a rotor a permanent magnet having a stator that is fixed to the housing and has a winding wound around it, with a gap formed on the outer periphery of the rotor, and is partially formed on the outer peripheral surface of the permanent magnet. A groove extending in the circumferential direction, a magnetic path member press-fitted between the rotary shaft and the permanent magnet, and a groove formed in the permanent magnet to reinforce the rotor, The portion corresponding to the permanent magnet is a magnetically permeable member and the portion corresponding to the non-magnetic member is a low magnetically permeable member, and the magnetically permeable member and the low magnetically permeable member are sequentially arranged in the circumferential direction and joined to each other. From the band A permanent magnet, characterized in that it has about the generator-motor to the rotor.

In addition, power generation using this permanent magnet as a rotor
The electric motor has a reinforcing ring fitted around the outer peripheral surfaces of the permanent magnet, the non-magnetic body, and the band, and the reinforcing ring has a portion corresponding to the permanent magnet made of a magnetically permeable member and the non-magnetic member. A portion corresponding to the magnetic body is formed of a low magnetic permeability member, and the magnetic permeability member and the low magnetic permeability member are sequentially arranged in the circumferential direction and joined to each other.

Further, power generation using this permanent magnet as a rotor
In the electric motor, the magnetically permeable member in the reinforcing ring is made of steel or nickel, a cobalt alloy, and the low magnetic permeable body is made of austenitic stainless steel or a non-magnetic material such as an aluminum alloy, a copper alloy or a titanium alloy. It is characterized by that.

[0013]

Operation: Power generation using a permanent magnet according to the present invention as a rotor
The electric motor is configured as described above and operates as follows. That is, in a generator / motor using this permanent magnet as a rotor, a groove extending partially in the circumferential direction is formed on the outer peripheral surface of the permanent magnet constituting the rotor, and a magnetic field is provided between the rotary shaft and the permanent magnet. Since the path member is press-fitted and the non-magnetic band is fitted in the groove formed in the permanent magnet, the rotor can be reinforced, the mechanical strength of the rotor can be improved, and the rotor is The permanent magnet will not be destroyed even if it is rotated at a high speed and a centrifugal force acts.

In addition, power generation using this permanent magnet as a rotor
The electric motor is formed in the permanent magnet by forming a groove that partially extends in the circumferential direction on the outer peripheral surface of the permanent magnet that forms the rotor, and press-fitting a magnetic path member between the rotary shaft and the permanent magnet. A band is fitted in the groove, and the portion of the band corresponding to the permanent magnet is a magnetically permeable member and the portion corresponding to a non-magnetic material is a low magnetically permeable member. Since the magnetic member and the magnetic member are sequentially arranged in the circumferential direction and joined to each other, the output of the permanent magnet is not reduced by the band, and the rotor is reinforced to improve the mechanical strength of the rotor. Even if the rotor rotates at high speed and centrifugal force acts, the permanent magnet is not destroyed.

Further, power generation using this permanent magnet as a rotor
The electric motor has a reinforcing ring fitted around the outer peripheral surfaces of the permanent magnet, the low-permeability magnetic body, and the band, and the reinforcing ring is a magnetically permeable member at a portion corresponding to the permanent magnet. Moreover, since the portion corresponding to the non-magnetic body is formed of a low magnetic permeability member, and the magnetic permeability member and the low magnetic permeability member are sequentially arranged in the circumferential direction and joined to each other, centrifugal force of the rotor is reduced. Even if it is large, it is possible to sufficiently secure the mechanical strength capable of withstanding the centrifugal force, and moreover, since the magnetically permeable member of the reinforcing ring is aligned facing the permanent magnet, The magnetic member constitutes a magnetic path, and the reinforcing ring does not reduce the magnetic force. Further, since the outer peripheral surface of the rotor is covered with the reinforcing ring, a sufficient and stable clearance for rotating the rotor can be secured between the rotor and the stator, which is extremely efficient. High output can be obtained.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a generator / motor having a permanent magnet as a rotor according to the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing an embodiment of a generator / motor using a permanent magnet as a rotor according to the present invention, and FIG. 2 is an arrangement state of rotor permanent magnets in a generator / motor using the permanent magnet of FIG. 1 as a rotor. FIG. 3 is a perspective view showing a fitted state of the reinforcing ring of the rotor of FIG. 2, FIG. 4 is a development view showing a manufacturing process of the reinforcing ring, and FIG. 5 is a perspective view showing a manufacturing process of the reinforcing ring. 6 is a sectional view showing the rotor taken along the line AA in FIG. 1, FIG. 7 is a perspective view showing the magnetic path member, and FIG. 8 is a sectional view showing the rotor taken along the line BB in FIG. .

The generator / motor having a permanent magnet as a rotor according to the present invention mainly comprises a housing 1 and a pair of bearings 1.
6, a rotor 3 rotatably supported via a rotor 6, a rotor 3 fixed to the rotor 2 and provided with permanent magnets 9 circumferentially spaced by a non-magnetic body 10, and an outer periphery of the rotor 3. And a stator 5, which is fixed to the housing 1 with a gap 26 formed therein, and around which a coil or winding 6 is wound. The rotary shaft 2 includes the casings 15 and 2 of the transmission 14.
4 is rotatably supported via bearings 17, 17. The casing 15 has a pulley 30 directly connected to the engine.
Is provided. The transmission 14 functions as a speed increaser composed of a planetary gear mechanism, and has a ring gear 12 fixed to a casing 18, a sun gear 13 fixed to the rotating shaft 2,
It also has a planetary gear 11 that meshes with the sun gear 13 and the ring gear 12. The casing 24 functions as a carrier of the planetary gear 11, and is attached to, for example, the housing 1 or another rotating body, and the shaft 31 that rotatably supports the planetary gear 11 is fixed. Therefore, the pulley 3 that is rotated by the rotational force from the engine
The rotation of 0 is transmitted to the rotary shaft 2 after being accelerated by the transmission 14.

In the power generator / motor using the permanent magnet as a rotor, the rotor 3 is composed of a pair of ring-shaped magnetic path members made of a highly magnetically permeable material fixed to the rotary shaft 1 by a nut 23 in the axial direction. 4, a plurality (six in the figure) of non-magnetic members 10 fixed to the outer circumference of the magnetic path member 4, and the non-magnetic member 1.
It is composed of a plurality (six in the figure) of permanent magnets 9 which are spaced apart by 0 in the circumferential direction. Further, in the rotor 3, the permanent magnet 9 is fixed between the non-magnetic bodies 10, so that the rotor 3 is surrounded by the reinforcing ring 20. The magnetic path member 4 has a truncated cone-shaped end magnetic path portion 7 located outside the permanent magnet 9, and the slit 25 is formed in the end magnetic path portion 7 so as to correspond to the non-magnetic body 10. Has been done. A pair of magnetic path members 4 are fixed to the permanent magnet 9 in a state of being press-fitted from both sides of the permanent magnet 9.

In the generator / motor using the permanent magnets as the rotor, the rotor 3 is particularly arranged in such a manner that a plurality of the rotors 3 are arranged on the outer peripheral surfaces of the plurality of permanent magnets 9 having a fan-shaped cross section so as to be longitudinally spaced and extend in the circumferential direction. Grooves 19 are formed, the band 8 is fitted and fixed in the grooves 19, the magnetic path member 4 is press-fitted between the rotary shaft 2 and the permanent magnet 9, and the permanent magnet 9 is further attached to the outer peripheral surface of the magnetic path member 4. The reinforcing ring 20 is attached so as to surround the outer circumference of the permanent magnet 9 for fixing. The band 8 is to reinforce the rotor 3, and a portion corresponding to the permanent magnet 9 is made of a magnetically permeable member 28 made of a highly magnetically permeable material, and a portion corresponding to the non-magnetic body 10 is made of a low magnetically permeable material. The magnetically permeable member 28 and the low magnetically permeable member 27 are sequentially arranged in the circumferential direction and are joined to each other. The band 8 is made of a strip-shaped plate, and the strip-shaped plate is fitted into a groove 19 formed in the permanent magnet 9 and wound into a ring shape, and then welded using a welding device 29 as shown in FIG. The end of the belt-shaped plate in the shape of a ring is fixed.

Further, the reinforcing ring 20 reinforces the rotor 3 having a large centrifugal force, and fixes the permanent magnet 9 to the outer peripheral surface of the magnetic path member 4, so that the non-magnetic member 10 is interposed between the permanent magnets 9. And the permanent magnet 9 and the non-magnetic body 10 are surrounded by each other and are fitted in a ring-shaped assembled state. As shown in FIG. 3, the reinforcing ring 20 has a magnetically permeable member 22 at a portion corresponding to the permanent magnet 9 and a low magnetically permeable member 21 at a portion corresponding to the non-magnetic body 10. The member 22 and the low magnetic permeability member 21 are sequentially arranged in the circumferential direction and joined to each other. In the reinforcing ring 20, for example, the magnetically permeable member 22 is made of steel, nickel, or
Made of cobalt alloy. In addition, the low magnetic permeability member 2
1 is made of austenitic stainless steel or a non-magnetic material such as aluminum alloy, copper alloy or titanium alloy.

In the power generator / motor having the permanent magnet as a rotor, the band 8 and the reinforcing ring 20 are constructed as described above, and the positional relationship between the band 8 and the reinforcing ring 20 is shown in FIG. It is positioned as. That is, the inner surface of the magnetically permeable member 28 of the band 8 is aligned with and in contact with the permanent magnet 8, and the outer surface of the magnetically permeable member 28 is in contact with the reinforcing ring 20.
Aligned with and in contact with the magnetically permeable member 22. The inner surface of the low magnetic permeability member 27 of the band 8 is aligned with and in contact with the non-magnetic body 10, and the outer surface of the low magnetic permeability member 27 is aligned with and contacts with the low magnetic permeability member 21 of the reinforcing ring 20. ing. Therefore, although the band 8 and the reinforcing ring 20 reinforce the mechanical strength of the permanent magnet 8, the magnetic force of the permanent magnet 8 is not reduced, and extremely efficient high output can be obtained.

The power generator / motor having the permanent magnet as a rotor is constructed as described above, and thus is operated as follows. When the engine is started and the pulley 30 rotates, the rotary shaft 3 rotates through the transmission 14. Rotating shaft 2
When is rotated, the magnetic flux generated by the permanent magnet 9 flows to the stator 5 through the magnetic path member 4 and the end magnetic path member 7, and a current is generated in the coil winding 6 to generate electricity.

In the generator / motor using the permanent magnet as the rotor, even if the rotor 3 rotates at a high speed and a large centrifugal force is generated in the permanent magnet 9, the permanent magnet 9 is generated by the band 8 and the reinforcing ring 20. Since the permanent magnets 9 are fastened, the permanent magnet 9 is not damaged, the rotor 9 rotates well, and the output is improved with high efficiency.

The power generator / motor having a permanent magnet as a rotor according to the present invention is configured as described above, but is not limited to the above configuration, and may be configured as shown in FIG. 9 or 10, for example. it can. 9 is a sectional view showing another rotor corresponding to FIG. 8, and FIG. 10 is a sectional view showing yet another rotor corresponding to FIG. 9 and 10, parts corresponding to the parts shown in FIG. 8 are designated by the same reference numerals.

The embodiment shown in FIG. 9 is different from the embodiment shown in FIGS. 1 and 8 in that the reinforcing ring 20 is not provided, and the other parts have exactly the same structure. The generator / motor having a permanent magnet as a rotor shown in FIG. 9 can be applied to a rotor in which the centrifugal force of the rotor 3 is smaller than that shown in FIG. 8, and is more compact than that shown in FIG. it can.

The embodiment shown in FIG. 10 is different from the embodiments shown in FIGS. 1 and 8 in that the reinforcing ring 20 is not provided and the band is made of a different material. It has the same structure. In the generator / motor having a permanent magnet as a rotor shown in FIG. 10, the band is composed of a nonmagnetic band 29 made of a nonmagnetic material over the entire circumference. In this example,
The present invention can be applied to a rotor having a smaller centrifugal force than that shown in FIG. 8, and can be made more compact than that shown in FIG. Furthermore, since the non-magnetic band 29 is made of the same material over the entire circumference and has no joint part in the middle in the circumferential direction, the strength of the band itself can be increased. The nonmagnetic band 29 can be made of an aluminum alloy, a titanium alloy, or a copper alloy.

In the generator / motor using the permanent magnets as the rotor, the permanent magnets 9 having a fan-shaped cross section become disjointed even if the rotor 3 composed of the permanent magnets 9 rotates at high speed as described above. It is not likely to be damaged, and is extremely preferable when applied to an engine such as a cogeneration engine that converts rotational energy into electric energy, an automobile engine, or the like. In this case, the output shaft of an engine such as a cogeneration engine can be incorporated by directly connecting an input shaft such as a pulley 30 included in a generator / motor having a permanent magnet as a rotor.

[0028]

The power generator / motor having a permanent magnet as a rotor according to the present invention is constructed as described above and has the following effects. That is, in a generator / motor using this permanent magnet as a rotor, the rotor is composed of a permanent magnet, and a band is fitted in a groove extending in the circumferential direction formed on the outer peripheral surface of the permanent magnet, and the rotation shaft and the permanent magnet are Since the magnetic path member is press-fitted between the magnet and the band, the rotor can be reinforced by the band, the mechanical strength of the rotor can be improved, and the rotor rotates at a high speed so that centrifugal force acts. However, the permanent magnet is not destroyed. The band can be configured as a non-magnetic band entirely with a non-magnetic material, and by configuring the band itself with one type of material, there is no different type of material,
Since there is no joint part on the way, the strength of the band can be increased.

Alternatively, the band is formed by sequentially arranging a magnetically permeable member and a low magnetically permeable member in the circumferential direction and joining them, and a portion corresponding to the permanent magnet is the magnetically permeable member.
The portion corresponding to the non-magnetic material between the permanent magnets may be formed of the low magnetic permeability member. In this case, the strength of the band is slightly lower than that of the non-magnetic band, but the magnetic force of the permanent magnet due to the band is not reduced, and extremely high efficiency and high output are ensured. You can

Alternatively, when the centrifugal force of the rotor increases, the outer circumferences of the permanent magnet, the non-magnetic body and the band are surrounded by a reinforcing ring in addition to the band to reinforce the rotor. be able to. The rotor can significantly improve the mechanical strength of the rotor by the band and the reinforcing ring, and the permanent magnet is destroyed even when the rotor rotates at high speed and a large centrifugal force acts. There is no. Further, since the reinforcing ring is present between the permanent magnet and the stator, a sufficient and stable clearance for rotating the rotor can be secured, and a high output can be obtained extremely efficiently.

Further, power generation using this permanent magnet as a rotor
In the electric motor, in the reinforcing ring, a portion corresponding to the permanent magnet is a magnetically permeable member and a portion corresponding to the non-magnetic body is a low magnetically permeable member, and the magnetically permeable member and the low magnetically permeable member are provided. Since the reinforcing rings function as reinforcing members for the permanent magnets, the reinforcing rings and the bands do not obstruct the magnetic path, and the permanent magnets are arranged. The magnetic flux density of 1 does not decrease, and the amount of power generation does not decrease.

Further, power generation using this permanent magnet as a rotor
Since the electric motor can be configured as described above, a non-magnetic band or a composite band composed of a low magnetic permeability member and a magnetic permeability member is selected as the band in consideration of the centrifugal force, space, cost, etc. of the rotor. can do. Further, when the rotor rotates at a high speed and a large centrifugal force acts on the rotor, if a member incorporating the reinforcing ring in addition to the band is selected, an appropriate one is selected according to the application. Can be used. In addition, power generation using this permanent magnet as a rotor
In the electric motor, the magnetic body in the reinforcing ring is made of steel or nickel, a cobalt alloy, and the low magnetic permeability body is made of austenitic stainless steel or a non-magnetic material such as an aluminum alloy, a copper alloy or a titanium alloy. Therefore, the joint portions of the reinforcing ring are firmly joined to each other, and the strength at the joint portions is not significantly reduced.

[Brief description of drawings]

FIG. 1 is a power generation system using a permanent magnet according to the present invention
It is sectional drawing which shows one Example of an electric motor.

FIG. 2 is a perspective view showing an arrangement state of permanent magnets of a rotor in a generator / motor having the permanent magnet of FIG. 1 as a rotor.

FIG. 3 is a perspective view showing a state where the reinforcing ring of the rotor of FIG. 2 is fitted to a permanent magnet.

FIG. 4 is a development view of a reinforcing ring for showing a manufacturing process of the reinforcing ring.

FIG. 5 is a perspective view showing a manufacturing process of the reinforcing ring and showing a welding state of the reinforcing ring.

FIG. 6 is an end view showing the rotor along line AA in the generator / motor using the permanent magnet of FIG. 1 as a rotor.

FIG. 7 is a perspective view showing a magnetic path member in the rotor.

8 is a cross-sectional view showing the rotor taken along the line BB in FIG.

9 is a cross-sectional view showing another rotor corresponding to FIG.

10 is a sectional view showing still another rotor corresponding to FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Rotating shaft 3 Rotor 4 Magnetic path member 5 Stator 6 Winding 7 Frustum-shaped end magnetic path part 8 Band 9 Permanent magnet 10 Non-magnetic material 16,17 Bearing 19 Groove 20 Reinforcement ring 21 Low magnetic permeability member 22 Magnetically permeable member 27 Low magnetically permeable member 28 Magnetically permeable member 29 Non-magnetic band

Claims (4)

[Claims] 1. A rotor comprising a rotary shaft rotatably supported by a housing, a plurality of permanent magnets circumferentially separated by a non-magnetic material fixed to the rotary shaft, and an outer periphery of the rotor. In a generator / motor using a permanent magnet having a stator having a gap formed in the housing and having a winding wound around the housing as a rotor, a circumferential direction partially formed on an outer peripheral surface of the permanent magnet. A groove extending to the magnetic disk, a magnetic path member press-fitted between the rotary shaft and the permanent magnet, and a non-magnetic band fitted in the groove formed in the permanent magnet to reinforce the rotor. A generator / motor that uses a permanent magnet as a rotor, which is characterized in that it is configured. 2. A rotor having a rotary shaft rotatably supported by a housing, a plurality of permanent magnets circumferentially spaced by a non-magnetic material fixed to the rotary shaft, and an outer circumference of the rotor. In a generator / motor using a permanent magnet having a stator having a gap formed in the housing and having a winding wound around the housing as a rotor, a circumferential direction partially formed on an outer peripheral surface of the permanent magnet. Corresponding to the permanent magnet, which is inserted into the groove formed in the permanent magnet to reinforce the rotor, and the magnetic path member press-fitted between the rotary shaft and the permanent magnet. A portion which is a magnetically permeable member and a portion corresponding to the non-magnetic material is a low magnetically permeable member, and the magnetically permeable member and the low magnetically permeable member are sequentially arranged in the circumferential direction and joined to each other, It is composed of Power generation using a permanent magnet as a rotor
Electric motor. 3. A reinforcing ring fitted around the outer peripheral surfaces of the permanent magnet, the non-magnetic body and the band,
The reinforcing ring is configured such that a portion corresponding to the permanent magnet is a magnetically permeable member and a portion corresponding to the non-magnetic body is a low magnetically permeable member, and the magnetically permeable member and the low magnetically permeable member are sequentially arranged in the circumferential direction. The generator / motor having the permanent magnet as a rotor according to claim 2, wherein the generator and the rotor are arranged and joined to each other. 4. The magnetically permeable member in the reinforcing ring is made of steel, nickel, or a cobalt alloy, and the low magnetic permeable body is austenitic stainless steel or a non-magnetic material such as an aluminum alloy, a copper alloy, or a titanium alloy. It is produced, The generator / motor which uses the permanent magnet according to any one of claims 1 to 3 as a rotor.