JP2006034024A - Permanent magnet rotor of dynamo-electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a permanent magnet rotor of a dynamo-electric machine that makes it possible to easily mount magnetized permanent magnet poles using a plurality of magnet pieces on a rotor yoke and that can improve the dimensional accuracy of the arrangement position of the permanent magnet poles. <P>SOLUTION: A permanent magnet rotor 1 of this invention is provided with the rotor yoke 2 that has grooves (recessed ones) 21 for mounting the permanent magnet poles 3, the even number of permanent magnet poles 3 that have permanent magnet pole bodies 7 using a plurality of the magnet pieces 71 and pole mounting bodies 31 made of an iron material of a flat plate, fasteners (bolts) 4, and a binding layer 5 for protecting the permanent magnet poles 3 using a glass fiber reinforced tape made of ethylene tetrafluoride resin. The permanent magnet poles 3 are magnetized after the magnet pieces 71 are mounted in a not-yet-magnetized state on the pole mounting bodies 31 with an adhesive. Then, the pole mounting bodies 31 are fitted into the grooves 21 and fixed to the rotor yoke 2 with the fasteners 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a permanent magnet rotor of a rotating electric machine provided with even-numbered permanent magnet magnetic poles each composed of a plurality of magnet pieces at a portion facing a stator of a rotor yoke.

In a permanent magnet rotor of a rotating electrical machine, an even number of permanent magnet magnetic poles are mounted on the part facing the stator of the rotor yoke. However, the conventional method of mounting a permanent magnet magnetic pole on the rotor yoke For example, a permanent magnet type magnetic pole is attached to the rotor yoke by an adhesion method or the like (see, for example, Patent Document 1), or is attached to the rotor yoke using a fastening body such as a bolt (for example, see Patent Document 2). .) Is known.
Hereinafter, a permanent magnet rotor of a conventional rotating electric machine will be described with reference to FIGS. First, FIG. 5 is a perspective view showing an outline of a permanent magnet rotor of a conventional rotary electric machine. In FIG. 5, reference numeral 9 denotes a rotor center 92 having a rotor yoke 91 made of a ferromagnetic material having a cylindrical outer peripheral surface shape, and a stator in this case of the rotor yoke 91 (not shown). The inner rotor type rotary electric machine of the conventional example, which has an even number of permanent magnet type magnetic poles 8 and a rotor shaft 99 mounted on the outer peripheral portion 911, which is a portion facing each other) with an adhesive. This is a permanent magnet rotor. FIG. 6 is a perspective view showing an outline of a permanent magnet rotor of a rotating electric machine according to a different example of the prior art. FIG. 6A is an overall view, and FIG. 6B is a diagram of P in FIG. It is an enlarged view of a part.

  In FIG. 6, 9A opposes the rotor center 92 which has the rotor yoke 91 which has the shape of a cylindrical outer peripheral surface, and the stator (not shown) in this case of the rotor yoke 91. The inner rotor type rotary electric power of the conventional example provided with an even number of permanent magnet type magnetic poles 8A and a rotor shaft 99 mounted on the outer peripheral portion 911 which is a part using bolts 98 as a plurality of fastening bodies. It is a permanent magnet rotor of a machine. In the permanent magnet rotors 9 and 9A of the rotating electrical machine, it is an essential condition that the permanent magnet type magnetic poles 8 and 8A are preliminarily magnetized, but the permanent magnet type magnetic poles 8 and 8A are attached to the permanent magnet type magnetic poles 8 and 8A. In the case of a large rotating electric machine, the point of time when the magnetism is performed is generally before the permanent magnet type magnetic poles 8 and 8A are mounted on the rotor yoke 91. In addition to the method described above, the permanent magnet type magnetic pole can be attached to the rotor yoke by a groove having a shape such as a dovetail type or an inverted T type at the part where the permanent magnet type magnetic pole of the rotor yoke is attached. A method of forming and fitting a permanent magnet type magnetic pole into the groove is also known.

  In addition, in the permanent magnet type rotors 9 and 9A, glass fiber, synthetic resin material (tetrafluoroethylene resin material, etc.), etc. are used for surface protection of the permanent magnet type magnetic poles 8 and 8A, protection against centrifugal force, and the like. Using a tape material or a sheet material made of an electrical insulating material as a binding material, a protective layer wound from the outer surface side so as to go around the outer periphery of the permanent magnet type magnetic poles 8 and 8A is formed as necessary. ing. By the way, for the permanent magnet type magnetic poles 8 and 8A, the adoption of rare earth magnets (samarium cobalt type, neodymium type, etc.) is being promoted as the permanent magnet material to be used, and the rare earth magnet has a large magnetic energy (maximum BH product). Because of its value, permanent magnet magnetic poles are increasingly being used in rotating electrical machines with large capacities. Large-capacity rotating electrical machines have a large physique, so the permanent magnet type magnetic poles must be large, but due to restrictions imposed by the permanent magnet manufacturing facilities, the large-sized rotating electrical machines used in large-capacity rotating electrical machines In the permanent magnet type magnetic pole, a combination of a plurality of magnet pieces is generally used.

  Below, the arrangement | positioning state of the several magnet piece of the permanent magnet type | mold magnetic pole in which the several magnet piece of the permanent magnet type rotor of the rotary electric machine of the further another example of the conventional is used is demonstrated using FIG. FIG. 7 is an explanatory diagram developed in a plane to explain the state of arrangement of magnet pieces in a permanent magnet type magnetic pole using a plurality of magnet pieces of a permanent magnet type rotor of a rotating electric machine of a further different example of the prior art. (A) is not skewed, (b) is skewed at a uniform angle, (c) is V-shaped skewed, (d) is A case where a V-shaped skew is applied and a staircase arrangement is shown is shown. In addition, the dashed-dotted line to which the code | symbol X and X was attached | subjected to each of both ends in FIG. 7 has shown the rotation center axis line of the permanent magnet type | mold rotor. In FIG. 7A, reference numeral 7 denotes a permanent magnet type magnetic pole that is not skewed. By arranging a plurality of magnet pieces 71 having a rectangular upper surface shape as shown in the figure, each permanent magnet type magnetic pole 7 is arranged. It is composed.

  In FIG. 7B, reference numeral 7A denotes a permanent magnet type magnetic pole that is skewed at a uniform angle as a whole, and a plurality of magnet pieces 72 having a parallelogram upper surface shape are arranged as shown. Thus, each permanent magnet type magnetic pole 7A is configured. The skew exemplified in the permanent magnet type magnetic pole 7A is an electromagnetic torque generated by the presence of a stator winding groove (not shown) that houses a stator winding (not shown) of the stator. This is a well-known method used to reduce fluctuations and vibrations. The skew angle θ of the permanent magnet type magnetic pole 7A is 2R as the diameter of the outer peripheral surface of the permanent magnet type magnetic pole 7A, and the skew interval at both ends in the axial length direction of the permanent magnet type magnetic pole 7A (the diameter of the outer surface of the permanent magnet type magnetic pole 7A). Θ (radian) = L / R where L is the arc length along the circumferential direction of 2R. The skew angle θ is generally set to an integral multiple of the pitch angle of the stator winding groove of the stator.

  In FIG. 7C, reference numeral 7B denotes a permanent magnet type magnetic pole with a V-shaped skew, which is a V-shaped skew, and shows a plurality of magnet pieces 73 and 74 having a parallelogram upper surface shape. By arranging in this way, each permanent magnet type magnetic pole 7B is comprised. In this case, the skew interval L between the both end portions in the axial length direction of the permanent magnet type magnetic pole 7B and the central portion has the same value as the skew interval L in the case of the permanent magnet type magnetic pole 7A. It is. In the permanent magnet type magnetic pole 7A to which a uniform skew is applied, a magnetic component in a direction parallel to the alternate long and short dash line XX is generated. Therefore, the skew is performed so that the magnetic component can be canceled. The arrangement is the V-shaped skew exemplified in the permanent magnet type magnetic pole 7B. Thus, the magnet piece 73 and the magnet piece 74 are bisectors in the axial length direction of the permanent magnet type magnetic pole 7B [indicated by a one-dot chain line YY in FIG. 7C. ] And a plane-symmetrical relationship with respect to a plane perpendicular to the alternate long and short dash line XX.

  Furthermore, in FIG. 7D, 7C is a permanent magnet type magnetic pole which is V-skewed and arranged in a staircase pattern, and a large number of magnet pieces 75 having a rectangular upper surface shape are shown in the drawing. By arranging them, each permanent magnet type magnetic pole 7C is constituted. A large number of magnet pieces 75 are arranged by using a jig or the like so that the side end portions in the left-right direction of the paper surface in FIG. Since the shape formed by the side end portions is stepped, such an arrangement state of the magnet pieces is generally called a stepped arrangement. The stepped arrangement of a large number of magnet pieces 75 shown in the permanent magnet type magnetic pole 7C has come to be widely used for a permanent magnet type magnetic pole having an arc-shaped outer surface shape for a large-capacity rotating electrical machine that performs skewing. ing. Thus, a bisector in the axial length direction of the permanent magnet type magnetic pole 7C [indicated by a one-dot chain line YY in FIG. 7 (d). ], The magnet pieces 75 arranged at the upper and lower parts of the paper surface in FIG. 7 (d) are arranged in a relation of plane symmetry with respect to a plane including the bisector and perpendicular to the alternate long and short dash line XX. In this case, the skew interval L between the end portions of the permanent magnet type magnetic pole 7C in the axial direction and the central portion is the same value as the skew interval L of the permanent magnet type magnetic pole 7A. is there.

Thus, in the case of the conventional permanent magnet type magnetic poles 7 to 7C using a plurality of magnet pieces, the magnet pieces 71, 72, 73, 74 and 75 constituting the permanent magnet type magnetic poles 7 to 7C are used. Are attached to the rotor yoke using a fastening body such as a bolt illustrated in FIG. 6 and mounted to the rotor yoke using the adhesive illustrated in FIG. In the former case, each magnet piece (magnet piece 71 and the like) is generally formed with an appropriate number of fastening body loading portions and pre-magnetized in advance. In the latter case, when a plurality of magnet pieces preliminarily magnetized are directly attached to a predetermined arrangement site of the permanent magnet type magnetic poles 7 to 7C of the rotor yoke using an adhesive, the magnet pieces are magnetized in advance. When assembling the permanent magnet type magnetic poles 7 to 7C with a plurality of magnet pieces using an adhesive, and attaching the permanent magnet type magnetic poles 7 to 7C to the rotor yoke using an adhesive, Assembling the permanent magnet type magnetic poles 7 to 7C with a plurality of magnetized magnet pieces using an adhesive, magnetizing the permanent magnet type magnetic poles 7 to 7C individually, and then applying the adhesive to the rotor yoke There are known cases of using and mounting.
JP 11-89141 A (page 3-4, FIG. 1-2) JP 2002-136081 A (page 2-3, FIGS. 1 and 6)

As illustrated in FIG. 7, the rotating electric machine according to the related art such as the permanent magnet type rotors 9, 9 </ b> A having the permanent magnet type magnetic poles 8, 8 </ b> A in which a plurality of magnet pieces (magnet pieces 71, etc.) are arranged. In the permanent magnet type rotor, as described above, the permanent magnet type magnetic poles 8 and 8A are assembled using the magnet pieces pre-magnetized, and the permanent magnet type magnetic poles after being assembled using the non-magnetized magnet pieces. There is a case where magnetization is performed every eight. However, such a conventional permanent magnet rotor of a rotating electrical machine has the following problems. First, (a) when a plurality of pre-magnetized magnet pieces are attached to the rotor yoke 91 using a fastening body, strong magnetic force between the magnet pieces and around the magnet pieces due to the magnetic charge of the magnetic poles of the magnet pieces. The magnetic force acting between the magnetic body (for example, the rotor yoke 91) is a major problem in the work.
In particular, when a plurality of magnet pieces are arranged close to each other as illustrated in FIG. 7, the same poles of the plurality of magnet pieces are brought close to each other, and a large repulsive force is generated between them. This makes the task extremely difficult. This problem is also caused when (2) the permanent magnet type magnetic pole 8 is directly attached to a predetermined arrangement portion of the rotor yoke 91 illustrated in FIG. 7 by using an adhesive. The same applies. Next, (c) using a plurality of magnet pieces magnetized in advance, and assembling each permanent magnet type magnetic pole 8 with an adhesive like the permanent magnet type magnetic poles 7 to 7C illustrated in FIG. When the permanent magnet type magnetic pole 8 is attached to the rotor yoke 91 using an adhesive, the same problem as described in the above item (a) is encountered in the stage of assembling the permanent magnet type magnetic pole 8. appear.

  Further, when the assembled permanent magnet type magnetic pole 8 is mounted on the rotor yoke 91, the permanent magnet type magnetic pole 8 is caused by the magnetic force acting between the permanent magnet type magnetic pole 8 and the rotor yoke 91 made of a ferromagnetic material. May hit the rotor yoke 91, and the permanent magnet type magnetic pole 8 may be damaged. Further, (d) using a plurality of unmagnetized magnet pieces, each permanent magnet type magnetic pole 8 is assembled using an adhesive like the permanent magnet type magnetic poles 7 to 7C illustrated in FIG. When the permanent magnet type magnetic pole 8 is magnetized every 8 and the magnetized permanent magnet type magnetic pole 8 is attached to the rotor yoke 91 using an adhesive, a plurality of magnets are obtained by magnetizing the permanent magnet type magnetic pole 8. Due to the large repulsive force generated between the pieces, peeling may occur at the bonded portion between the magnet pieces. Also in this case, when the magnetized permanent magnet type magnetic pole 8 is attached to the rotor yoke 91, the same problem as described in the above item (c) occurs.

  Further, due to the above-described problems, the permanent magnet type magnetic pole 8 is not hit against the rotor yoke 91 when the permanent magnet type magnetic pole 8 assembled using a plurality of magnet pieces is mounted on the rotor yoke 91. It is necessary to be careful not to apply excessive force to the adhesive layer between the magnet pieces of the permanent magnet type magnetic pole 8. Therefore, the permanent magnet type magnetic pole 8 must be handled very delicately. As a result, there is a problem that a long working time is required. When the magnet piece (magnet piece 71 or the like) is attached to the rotor yoke 91, as described above, a large magnetic force acting between the magnet pieces or a magnetic force acting between the magnet piece and the rotor yoke 91 is used. The magnet piece must be mounted at a predetermined position against the attractive force. At this time, the magnet piece to be assembled should not collide with the rotor yoke 91 or the magnet piece already mounted on the rotor yoke 91. It is necessary to pay attention to.

  For this reason, there is also a problem that it is difficult to obtain a magnet piece having a level that satisfies the dimensional accuracy of the arrangement position of the magnet piece on the rotor yoke 91. Regarding the problem of the dimensional accuracy at the arrangement position, the same problem occurs when the permanent magnet type magnetic pole 8 assembled using a plurality of magnet pieces is mounted on the rotor yoke 91. Thus, the problem of the dimensional accuracy of the arrangement positions of the magnet pieces and the permanent magnet type magnetic poles 8 attached to the rotor yoke 91 causes an imbalance in the electromagnetic force generated by the even number of permanent magnet type magnetic poles 8 and 8A. For this reason, pulsation of generated torque and generation of vibration are caused in the permanent magnet rotors 9 and 9A and the rotary electric machine including the permanent magnet rotors 9 and 9A. Therefore, an object of the present invention is to easily attach a magnetized permanent magnet type magnetic pole using a plurality of magnet pieces to the rotor yoke portion, and to provide dimensional accuracy of the arrangement position of the permanent magnet type magnetic pole. It is an object of the present invention to provide a permanent magnet rotor for a rotating electrical machine capable of improving the above.

In the present invention, the aforementioned object is
1) In a permanent magnet rotor of a rotating electrical machine provided with an even number of permanent magnet type magnetic poles at a portion facing a stator of a rotor yoke, the permanent magnet type magnetic poles are a plurality of magnet pieces made of a permanent magnet material. A magnetic pole mounting body made of a ferromagnetic metal material to which these magnet pieces are mounted, and the permanent magnet type magnetic pole rotates at a portion on the opposite side to the portion on which the magnet piece is mounted of the magnetic pole mounting body. To be attached to the child yoke, or
2) In the means described in the item 1, the rotor yoke has a groove in a portion where the permanent magnet type magnetic pole is mounted, and the permanent magnet type magnetic pole is used in the rotor of the magnetic pole mounting body by using the groove. Attach to the yoke, or
3) In the means described in the item 1 or 2, the plurality of the magnet pieces of the permanent magnet type magnetic poles are predetermined when the magnet pieces are attached to the magnetic pole mounting body in an unmagnetized state. Placed in position, or
4) In the means according to any one of items 1 to 3, a plurality of the magnet pieces of the permanent magnet type magnetic pole are magnetized after being mounted on the magnetic pole mounting body made of a ferromagnetic metal material. Is achieved.

In the permanent magnet rotor of the rotating electrical machine according to the present invention, the following effects can be obtained by adopting the configuration described in the section for solving the problems.
(1) In the permanent magnet type magnetic pole according to the present invention, the magnet piece made of the permanent magnet material is mounted on the magnetic pole mounting body made of the ferromagnetic metal material through the adhesive layer, so that the permanent magnet type magnetic pole is magnetized. Between the magnet piece and the magnetic pole mounting body, a magnetic attractive force acting between the magnet piece and the magnetic metal magnetic pole mounting body is generated. When a permanent magnet type magnetic pole is magnetized, a large repulsive force is generated between a plurality of magnet pieces in the same manner as in the prior art. It works as a drag force against the force, and the adhesive force by the adhesive between the magnet piece and the magnetic pole mounting body works as a drag force, so it is possible to solve the problem of peeling at the adhesive part between the magnet pieces Become.
(2) Further, since the permanent magnet type magnetic pole according to the present invention is configured to be attached to the rotor yoke at the part of the magnetic pole mounting body, when the permanent magnet type magnetic pole is attached to the rotor yoke, the permanent magnet type magnetic pole is provided. The magnetic pole inevitably takes a posture in which the part of the magnetic pole mounting body is positioned on the front surface and brought close to the rotor yoke. Therefore, when the permanent magnet type magnetic pole according to the present invention is mounted on the rotor yoke, the permanent magnet type magnetic pole rotates as in the case of the prior art mainly due to the magnetic force acting between the permanent magnet type magnetic pole and the rotor yoke. Even if it collides with the child yoke, the portion that collides with the rotor yoke at that time becomes a magnetic pole mounting body made of a ferromagnetic metal material.

For this reason, even if the permanent magnet type magnetic pole according to the present invention collides with the rotor yoke, no impact force is directly applied to the magnet piece made of the permanent magnet material. Since the magnetic attraction force and the adhesive force of the adhesive are combined with the magnetic pole mounting body, it is possible to substantially eliminate the occurrence of breakage in the adhesive layer between the magnet pieces. Therefore, when the permanent magnet type magnetic pole according to the present invention is mounted on the rotor yoke, it is not necessary to handle the permanent magnet type magnetic pole very delicately as in the prior art, and the permanent magnet type magnetic pole to the rotor yoke is not required. The mounting operation can be performed with a general level of care. As a result, it is possible to significantly reduce the time for mounting the permanent magnet type magnetic pole on the rotor yoke as compared with the case of the prior art.
(3) Thus, in the case of the permanent magnet type rotor according to the present invention, the dimensional accuracy of the mounting position of the permanent magnet type magnetic pole body on the rotor yoke, which is formed of a plurality of magnet pieces, is the permanent magnet. Dimensional accuracy of the arrangement position of the magnetic pole body on the magnetic pole mounting body, and dimensional accuracy at the time of machining such as machining of the magnetic pole mounting body and a groove portion formed in the rotor yoke for mounting the magnetic pole mounting body. For this reason, in the permanent magnet type rotor, the dimensional accuracy regarding the mounting position of the permanent magnet type magnetic pole body can be remarkably improved as compared with the case of the prior art. As a result, the unbalanced amount of electromagnetic force, etc. existing in a rotating electric machine having a permanent magnet type rotor of the prior art due to the disparity of the mounting position of the permanent magnet type magnetic pole is the permanent In the case of a magnet rotor, it is reduced. Therefore, it is possible to reduce pulsation torque, vibration, etc., which are undesirable for a rotating electric machine due to an unbalanced amount of electromagnetic force, in the rotating electric machine using the permanent magnet rotor according to the present invention. .

The best mode for carrying out the present invention will be described below in detail with reference to the drawings. In the following description, the permanent magnet rotor of the conventional rotating electric machine shown in FIGS. 5 and 6 and the plurality of magnet pieces of the permanent magnet rotor of the rotating electric machine shown in FIG. The same reference numerals are given to the same parts as those of the conventional permanent magnet type magnetic pole in which is used, and the description thereof is omitted. In the following description, the name of the permanent magnet type magnetic pole 7 used in the permanent magnet type magnetic pole of the present invention will be referred to as the permanent magnet type magnetic pole body 7, so that the above-mentioned "Background Art" and " The confusion with the description in the section “Problems to be solved by the invention” will be avoided.
Embodiment 1 FIG. 1 is a perspective view showing a main part of a permanent magnet type rotor of a rotating electric machine according to an example of an embodiment of the present invention, and FIG. 2 shows a permanent magnet type magnetic pole according to FIG. It is explanatory drawing explaining the outline | summary of the assembly procedure of. 1 and 2, reference numeral 1 has a rotor yoke 2, except for the rotor yoke 2, a rotor center (not shown), an even number of permanent magnet type magnetic poles 3, and a required number of fastening bodies. This is a permanent magnet rotor of an inner rotor type rotary electric machine according to the present invention, which includes a certain bolt 4, a bind layer 5 provided as necessary, and a rotor shaft (not shown).

The permanent magnet type magnetic pole 3 includes a permanent magnet type magnetic pole body 7 having a required number of magnet pieces 71 and not skewed, and a magnetic pole mounting body 31 which is a characteristic component according to the present invention. The magnetic pole mounting body 31 is made of a ferromagnetic metal material such as a steel material, and a required number of through holes 32 for loading the bolts 4 are formed, and an upper surface 33 that is a portion on which the magnet piece 71 is mounted. In this case, both the lower surface 34 and the lower surface 34 that are opposite to the upper surface 33 are planar. Further, the magnetic pole mounting body 31 is a part of the rotor yoke which is a passage of the main magnetic flux in the permanent magnet rotor 1 with respect to the main magnetic flux generated in the permanent magnet rotor 1 by the permanent magnet magnetic pole 3. It is also a member that forms. Each magnet piece 71 is mounted in a predetermined position on the upper surface 33 of the magnetic pole mounting body 31 using an appropriate adhesive without being magnetized.
Thus, the arrangement position of each magnet piece 71 on the magnetic pole mounting body 31 is considered so that required dimensional accuracy can be obtained by using a jig or the like as necessary. Since the magnet piece 71 is not magnetized, the arrangement position of the magnet piece 71 on the magnetic pole mounting body 31 can easily obtain relatively high dimensional accuracy. The permanent magnet type magnetic pole 3 having all the required magnet pieces 71 mounted on the magnetic pole mounting body 31 is subjected to predetermined magnetization using a magnetizing device (not shown). In contrast to the rotor yoke 91 of the permanent magnet rotor 9 of the conventional example, the rotor yoke 2 is a concave groove which is a groove portion for mounting the permanent magnet magnetic pole 3 at a portion where the permanent magnet magnetic pole 3 is mounted. The only difference is that 21 is provided. A required number of screw holes 23 for the bolt 4 are formed on the bottom surface 22 with which the lower surface 34 of the magnetic pole mounting body 31 of the concave groove 21 abuts. In this case, the lower surface 34 is flat. Therefore, the bottom surface 22 is also planar.

The magnetized permanent magnet type magnetic pole 3 is fastened to the rotor yoke 2 by a bolt 4 by fitting the magnetic pole mounting body 31 into the concave groove 21. Further, the rotor center excluding the rotor shaft and the rotor yoke 2 included in the permanent magnet rotor 1 has the same configuration as the rotor shaft 99 and the rotor center 92 of the conventional example, for example. . The bind layer 5 is also used in the prior art using a tape material made of an appropriate electrical insulating material as a bind material for surface protection of the permanent magnet type magnetic pole body 7 and the like, protection against centrifugal force, and the like. It is a protective layer. In this case, a glass fiber reinforced tetrafluoroethylene resin tape material is used as the binding material of the binding layer 5.
Since the permanent magnet rotor 1 of the rotating electrical machine according to the example of the embodiment of the present invention shown in FIGS. 1 and 2 has the above-described configuration, the following operations and effects can be obtained. That is, in the permanent magnet type magnetic pole 3 according to the present invention, the magnet piece 71 of the permanent magnet type magnetic pole body 7 is mounted on the magnetic pole mounting body 31 made of a ferromagnetic metal material via the adhesive layer, so that the permanent magnet type magnetic pole 3 is provided. 3, a magnetic attractive force acting between the magnet piece 71 and the magnetic pole mounting body 31 made of a ferromagnetic metal material is generated between the magnet piece 71 and the magnetic pole mounting body 31. When the permanent magnet type magnetic pole 3 is magnetized, a large repulsive force is generated between the plurality of magnet pieces 71 as in the case of the prior art. However, in the permanent magnet type magnetic pole 3, the magnet piece 71 and the magnetic pole mounting body are used. The adhesive force of the adhesive between the magnet pieces 31 is large, and the problem of peeling at the adhesive portion between the magnet pieces 71 can be solved.

Further, since the permanent magnet type magnetic pole 3 according to the present invention is configured to be attached to the rotor yoke 2 at the portion of the magnetic pole mounting body 31, when the permanent magnet type magnetic pole 3 is attached to the rotor yoke 2, the permanent magnet type magnetic pole 3 is permanently attached. The magnet type magnetic pole 3 inevitably takes a posture in which the part of the magnetic pole mounting body 31 is positioned on the front surface and brought close to the rotor yoke 2. Therefore, when the permanent magnet type magnetic pole 3 is mounted on the rotor yoke 2, the magnetic force acting between the permanent magnet type magnetic pole 3 and the rotor yoke 2 is the main cause, as in the case of the prior art. Even if 3 hits the rotor yoke 2, the part that hits the rotor yoke 2 at that time becomes a magnetic pole mounting body 31 made of a ferromagnetic metal material.
For this reason, even if the permanent magnet type magnetic pole 3 collides with the rotor yoke 2, the impact force at that time is not directly applied to the permanent magnet type magnetic pole body 7, and the magnet piece 71 The permanent magnet type magnetic pole body 7 can be substantially prevented from being damaged because it is coupled to the magnetic pole mounting body 31 by the magnetic attractive force and the adhesive force of the adhesive. Therefore, when the permanent magnet type magnetic pole 3 according to the present invention is mounted on the rotor yoke 2, it is not necessary to handle the permanent magnet type magnetic pole 3 very delicately as in the case of the prior art. The attachment work to the child yoke 2 can be carried out with a general level of care. As a result, it is possible to significantly reduce the time for mounting the permanent magnet type magnetic pole 3 on the rotor yoke 2 as compared with the case of the prior art.

Thus, in the case of the permanent magnet type rotor 1 according to the present invention, the dimensional accuracy of the mounting position of the permanent magnet type magnetic pole body 7 on the rotor yoke 2 is the same as that of the magnetic pole mounting body 31 of the permanent magnet type magnetic pole body 7. Is determined by the dimensional accuracy at the time of processing such as machining of the magnetic pole mounting body 31 and the concave groove 21. For this reason, in the permanent magnet type rotor 1, the dimensional accuracy regarding the mounting position of the permanent magnet type magnetic pole body 7 can be remarkably improved as compared with the case of the prior art. As a result, the unbalanced amount of electromagnetic force existing in a rotating electric machine having a permanent magnet rotor of the prior art mainly due to the disparity of the mounting position of the permanent magnet type magnetic pole 7 is the permanent magnet type. In the case of the rotor 1, it is reduced. Therefore, the pulsating torque and vibration, which are undesirable for the rotating electrical machine due to the unbalanced amount of electromagnetic force, can be reduced in the rotating electrical machine using the permanent magnet rotor 1.
[Embodiment 2] FIG. 3 is a perspective view showing a main part of a permanent magnet rotor of a rotating electric machine according to a different example of the embodiment of the present invention. In FIG. 3, reference numeral 1A denotes a rotor yoke 2A, permanent magnet type magnetic pole instead of the rotor yoke 2 and permanent magnet type magnetic pole 3, with respect to the permanent magnet type rotor 1 according to the present invention shown in FIGS. This is a permanent magnet type rotor of an inner rotor type rotary electric machine that uses 3A and is not provided with a bolt 4 and a bind layer 5. In contrast to the rotor yoke 2, the rotor yoke 2 </ b> A is different from the rotor yoke 2 in that it includes a dovetail groove 24 instead of the groove 21. In the case of the groove portion 24 in this case, the bottom surface 25 is flat, and no screw hole for mounting a fastening body such as a bolt is formed. In contrast to the permanent magnet type magnetic pole 3, the permanent magnet type magnetic pole 3A has a magnetic pole mounting body 35 having a dovetail cross-sectional shape that is fitted in the groove 24 of the rotor yoke 2A instead of the magnetic pole mounting body 31. Yes. The magnetic pole mounting body 35 is made of a ferromagnetic metal material such as a steel material. The upper surface 33 is a portion where the magnet piece 71 is mounted, and the lower surface 34 is a portion opposite to the upper surface 33. In this case, both are planar, but a through hole for loading a fastening body such as a bolt is not formed.

The permanent magnet rotor 1A of a rotating electrical machine according to another example of the embodiment of the present invention shown in FIG. 3 has the above-described configuration, and this configuration method is applied to the rotor yoke of the permanent magnet magnetic pole according to the present invention. In addition to mounting methods using fastening bodies such as bolts, various methods employed for mounting permanent magnet magnetic poles on permanent magnet rotors to rotor yokes are widely used. It shows that it can be adopted. In addition, since the effect | action and effect obtained by 1 A of permanent magnet type | mold rotors are equivalent to the said effect | action and effect obtained by the permanent magnet type | mold rotor 1, it avoids duplication and the description is abbreviate | omitted.
[Embodiment 3] FIG. 4 is a perspective view showing a main part of a permanent magnet rotor of a rotating electric machine according to still another example of the embodiment of the present invention. In the following description, the same parts as those of the permanent magnet rotor 1 of the rotating electric machine according to the present invention shown in FIGS. In FIG. 4, only representative symbols are shown for the symbols given in FIGS. 1 and 2. In FIG. 4, 1B shows a permanent magnet type magnetic pole body 7B in place of the permanent magnet type magnetic pole body 3 instead of the permanent magnet type magnetic pole body 3 in the permanent magnet type rotor 1 according to the present invention shown in FIGS. This is a permanent magnet rotor of an inner rotor type rotary electric machine that uses the permanent magnet magnetic pole 3B to be used. The permanent magnet rotor 1B of a rotating electric machine according to still another example of the embodiment of the present invention shown in FIG. 4 has the above-described configuration, and this configuration method includes a plurality of magnets on the permanent magnet type magnetic pole according to the present invention. When applying a permanent magnet type magnetic pole body with a piece, in addition to the permanent magnet type magnetic pole body which is not skewed, various arrangement methods of a plurality of magnet pieces adopted in the permanent magnet type magnetic pole according to the prior art This also shows that it can be widely adopted. In addition, since the effect | action and effect obtained by the permanent magnet type rotor 1B are the same as the said effect | action and effect obtained by the permanent magnet type rotor 1, description is abbreviate | omitted to avoid duplication.

  In the above description, the permanent magnet rotor of the rotating electrical machine according to the present invention has been described as being an inner rotor type, but is not limited to this, for example, a structure different from an inner rotor type such as an outer rotor type. It may be of a type. In the above description, the upper surface 33 and the lower surface 34 of the magnetic pole mounting bodies 31 and 35 according to the present invention are both flat. However, the present invention is not limited to this. For example, a curved surface such as an arc surface. It may be. Then, the surface (for example, the bottom surfaces 22 and 25) of the groove part (for example, the concave groove 21 and the groove part 24) with which the lower surface (for example, the lower surface 34) of the magnetic pole mounting body (for example, the magnetic pole mounting bodies 31 and 35) contacts. ) Is preferably a shape adapted to the shape of the lower surface.

It is the perspective view which shows the principal part of the permanent-magnet-type rotor of the rotary electric machine by an example of embodiment of this invention. It is explanatory drawing explaining the outline | summary of the assembly procedure of the permanent magnet type | mold magnetic pole by FIG. It is the perspective view which shows the principal part of the permanent-magnet-type rotor of the rotary electric machine by the example from which this Embodiment differs. It is the perspective view which shows the principal part of the permanent-magnet-type rotor of the rotary electric machine by the further different example of embodiment of this invention. It is the perspective view which shows the outline | summary of the permanent-magnet-type rotor of the conventional rotary electric machine of an example. It is a perspective view which shows the outline | summary of the permanent magnet type rotor of the rotary electric machine of a different conventional example, (a) shows the whole figure, (b) is an enlarged view of the P section of (a) of FIG. . It is explanatory drawing expanded and shown in the plane shape explaining the arrangement | positioning state of the magnet piece in the permanent magnet type | mold magnetic pole using the several magnet piece of the permanent magnet type rotor of the rotary electric machine of the further different example of the past, (a) No skew is applied, (b) is skewed at a uniform angle, (c) is V-shaped skew, (d) is V-shaped. A case where a skew is applied and a staircase arrangement is employed is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Permanent magnet type rotor 2 Rotor yoke 21 Groove part (concave groove)
3 Permanent magnet type magnetic pole 31 Magnetic pole mounting body 4 Fastening body (bolt)
5 Binding layer 7 Permanent magnet type magnetic pole body 71 Magnet piece

Claims (4)

In the permanent magnet rotor of a rotating electric machine provided with an even number of permanent magnet type magnetic poles at a portion facing the stator of the rotor yoke,
The permanent magnet type magnetic pole has a plurality of magnet pieces made of a permanent magnet material and a magnetic metal pole mounting body made of a ferromagnetic metal material on which the magnet pieces are mounted, and the permanent magnet type magnetic pole is the magnet piece of the magnetic pole mounting body. A permanent magnet rotor for a rotating electric machine, wherein the rotor yoke is mounted on a portion that is substantially opposite to the portion on which the rotor is mounted. The permanent magnet rotor of the rotating electrical machine according to claim 1,
The rotor yoke has a groove in a portion where the permanent magnet type magnetic pole is mounted, and the permanent magnet type magnetic pole is mounted on the rotor yoke in the magnetic pole mounting body by using the groove. Permanent magnet rotor for machine. The permanent magnet rotor of the rotating electrical machine according to claim 1 or 2,
A plurality of the magnet pieces of the permanent magnet type magnetic pole are arranged at predetermined positions when the magnet pieces are attached to the magnetic pole mounting body in an unmagnetized state. Permanent magnet rotor. The permanent magnet rotor of the rotating electrical machine according to any one of claims 1 to 3,
The permanent magnet rotor of a rotating electrical machine, wherein the plurality of magnet pieces of the permanent magnet magnetic pole are magnetized after being mounted on the magnetic pole mounting body made of a ferromagnetic metal material.

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