WO2017195498A1 - Rotor and rotary electric machine - Google Patents

Rotor and rotary electric machine Download PDF

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Publication number
WO2017195498A1
WO2017195498A1 PCT/JP2017/013730 JP2017013730W WO2017195498A1 WO 2017195498 A1 WO2017195498 A1 WO 2017195498A1 JP 2017013730 W JP2017013730 W JP 2017013730W WO 2017195498 A1 WO2017195498 A1 WO 2017195498A1
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WIPO (PCT)
Prior art keywords
iron core
core piece
insertion hole
rotor
piece
Prior art date
Application number
PCT/JP2017/013730
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French (fr)
Japanese (ja)
Inventor
愛子 中野
宏紀 立木
篤史 坂上
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三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Publication of WO2017195498A1 publication Critical patent/WO2017195498A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets

Definitions

  • the present invention relates to a rotor and a rotating electrical machine that can be reduced in magnetic flux leakage and can be assembled at low cost.
  • rotating electrical machines used as electric motors and generators are required to be downsized, rotated at high speed, and increased in output.
  • a rotating electric machine having a shape in which a magnet is embedded in a rotor has been proposed. This utilizes the reluctance torque and increases the generated torque by combining it with the magnet torque generated by the magnet.
  • Patent Document 1 a bridge portion is cut to reduce leakage of magnetic flux, and a connecting member made of a non-magnetic material is inserted into the cut bridge portion, and the iron core is rotated during rotation of the rotor. It has been proposed to relieve the applied stress concentration.
  • the conventional rotor has a problem in that the connecting member is inserted into the notched bridge portion, so that the number of parts and processes is increased, the assemblability is lowered, and the cost is increased.
  • the present invention has been made to solve the above-described problems.
  • a rotor and a rotating electrical machine that can be constructed at low cost with improved assemblability as well as reduced leakage of magnetic flux.
  • the purpose is to provide.
  • the rotor of the present invention is in a rotor including an iron core formed by laminating a plurality of annular core pieces in the axial direction, an insertion hole formed in the iron core, and a permanent magnet installed in the insertion hole,
  • the iron core is formed by laminating a plurality of first iron core pieces and second iron core pieces, The first iron core piece and the second iron core piece are respectively
  • the insertion hole and the permanent magnet are formed in a convex shape in the center direction of the iron core,
  • the insertion hole has an outer arc portion on the outer side in the radial direction of the iron core, and an inner arc portion on the inner side in the radial direction of the iron core, Between the end of the insertion hole on the outer peripheral surface side of the iron core and the outer peripheral surface of the iron core, a bridge portion is formed,
  • the bridge portion includes a first end portion having one end connected to the outer arc portion of the insertion hole, a third end portion having one end connected to the inner arc portion of
  • the first end, the second end, and the third end are each formed by a circular arc surface,
  • R1 the radius of the arc surface of the first end portion
  • R2 the radius of the arc surface of the second end portion
  • R3 the radius of the arc surface of the third end portion
  • the rotor of the present invention is in a rotor including an iron core formed by laminating a plurality of annular core pieces in the axial direction, an insertion hole formed in the iron core, and a permanent magnet installed in the insertion hole,
  • the iron core is formed by laminating a plurality of first iron core pieces and second iron core pieces, The first iron core piece and the second iron core piece are respectively
  • the insertion hole and the permanent magnet are formed in a convex shape in the center direction of the iron core,
  • the insertion hole has an outer arc portion on the outer side in the radial direction of the iron core, and an inner arc portion on the inner side in the radial direction of the iron core, Between the end of the insertion hole on the outer peripheral surface side of the iron core and the outer peripheral surface of the iron core, a bridge portion is formed,
  • the bridge portion includes a first end portion having one end connected to the outer arc portion of the insertion hole, a third end portion having one end connected to the inner arc portion of
  • the rotating electrical machine of the present invention is The rotor shown above, A stator disposed coaxially with the rotor.
  • the leakage of magnetic flux can be reduced, and the assemblability can be improved and it can be configured at low cost.
  • FIG. 1 It is a perspective view which shows the structure of the rotary electric machine in Embodiment 1 of this invention. It is a top view which shows the structure of the rotary electric machine shown in FIG. It is a top view which shows the structure of the rotor of the rotary electric machine shown in FIG. It is the elements on larger scale which show the structure of the 1st iron core piece which the rotor of FIG. 3 comprises. It is the elements on larger scale which show the structure of the 2nd core piece which the rotor of FIG. 3 comprises. It is a top view which shows the state which combined the 1st iron core piece shown in FIG. 4, and the 2nd iron core piece shown in FIG. It is sectional drawing which shows the state which combined the 1st iron core piece shown in FIG.
  • FIG. Embodiments of the present invention will be described below.
  • 1 is a perspective view showing a configuration of a rotating electrical machine according to Embodiment 1 of the present invention.
  • FIG. 2 is a top view showing the configuration of the rotating electrical machine shown in FIG.
  • FIG. 3 is a top view showing the configuration of the rotor of the rotating electrical machine shown in FIG.
  • FIG. 4 is a partially enlarged view showing the configuration of the first iron core piece constituting the rotor of FIG.
  • FIG. 5 is a partially enlarged view showing the configuration of the second core piece that the rotor of FIG. 3 configures.
  • FIG. 6 is a plan view showing a state in which the first core piece shown in FIG. 4 and the second core piece shown in FIG. 5 are combined.
  • FIG. 7 is a cross-sectional view showing a state in which the first core piece shown in FIG. 4 and the second core piece shown in FIG. 5 are combined.
  • each direction in the rotating electrical machine 1 is shown as a circumferential direction Z, an axial direction Y, a radial direction X, an outer side X1 in the radial direction X, and an inner side X2 in the radial direction X. Therefore, also in the stator 2 and the rotor 3, these directions are the same direction.
  • the rotating electrical machine 1 includes a stator 2, a rotor 3, and a shaft 4.
  • the rotating electrical machine 1 is arranged in the order of the stator 2, the rotor 3, and the shaft 4 from the outer diameter side.
  • the air gap 5 is formed with a thickness of 0.1 mm to 2.5 mm, for example.
  • the stator 2 includes a stator core 20 and a coil 21.
  • the stator core 20 is formed in an annular shape.
  • the stator core 20 is formed by, for example, laminating electromagnetic steel plates in the axial direction Y. However, it is not limited to electromagnetic steel sheets.
  • the rotor 3 has an iron core 30 fixed to the shaft 4 inserted through the axial center position.
  • the iron core 30 is a magnet-type rotor that is disposed inside the stator 2 and includes a permanent magnet (hereinafter referred to as a magnet) 6.
  • the shaft 4 is fixed to the iron core 30 by, for example, shrink fitting or press fitting.
  • the rotating electrical machine 1 can be either distributed winding or concentrated winding.
  • the rotor 3 includes an iron core 30, an insertion hole 7, and a magnet 6.
  • the iron core 30 is formed by laminating a plurality of iron core pieces 31 that are magnetic materials in the axial direction Y.
  • the iron core piece 31 is formed of an electromagnetic steel plate.
  • the thickness of the electromagnetic steel sheet is, for example, 0.1 mm to 1.0 mm.
  • the plurality of iron core pieces 31 are connected in the axial direction Y by a crimping portion 8 as a connecting portion.
  • the crimping portion 8 is shown only in FIG. 6 for convenience.
  • the formation portion and the number of formation may be any. Moreover, it is only necessary that the iron core piece 31 can be connected in the axial direction Y even if it is not the caulking portion 8, and for example, it is possible to use an adhesive portion made of an adhesive.
  • the magnet 6 is formed in a convex shape in the center direction of the rotating electrical machine 1, that is, the iron core 30.
  • the outer peripheral side of the magnet 6 is an outer arc portion 6A
  • the inner peripheral side of the magnet 6 is an inner arc portion 6B. Both ends of the outer arc portion 6A of the magnet 6 and the inner arc portion 6B of the magnet 6 are connected by a plane or a curved surface.
  • the insertion hole 7 is formed in a convex shape in the central direction of the rotating electrical machine 1, that is, the iron core 30.
  • An outer side X1 in the radial direction X of the iron core 30 of the insertion hole 7 is defined as an outer arc portion 7A.
  • An inner side X2 in the radial direction X of the iron core 30 of the insertion hole 7 is defined as an inner arc portion 7B.
  • the insertion hole 7 is configured in a shape into which the magnet 6 can be inserted. Therefore, the outer arc portion 7 ⁇ / b> A of the insertion hole 7 is formed in a shape along which the outer arc portion 6 ⁇ / b> A of the magnet 6 extends.
  • the inner arc portion 7B of the insertion hole 7 is formed in a shape along which the inner arc portion 6B of the magnet 6 is aligned.
  • An adhesive or the like is applied to the outer periphery of the magnet 6.
  • the magnet 6 and the insertion hole 7 are fixed with an adhesive.
  • a flux barrier 10 is formed in the insertion hole 7 as a portion where the magnet 6 is not installed.
  • the flux barrier 10 is composed of a nonmagnetic material or a space.
  • a bridge portion 9 is formed between the end of the insertion hole 7 on the outer peripheral surface 31 ⁇ / b> A side of the core piece 31 and the outer peripheral surface 31 ⁇ / b> A of the core piece 31.
  • the outer peripheral surface 31 ⁇ / b> A of the iron core piece 31 is the same as the outer peripheral surface of the iron core 30.
  • the bridge portion 9 has a first end portion 9A, a second end portion 9B, and a third end portion 9C.
  • One end of the first end 9 ⁇ / b> A is connected to the outer arc 7 ⁇ / b> A of the insertion hole 7.
  • One end of the third end portion 9 ⁇ / b> C is connected to the inner arc portion 7 ⁇ / b> B of the insertion hole 7.
  • the second end 9B connects the other end of the first end 9A and the other end of the third end 9C.
  • the first end 9A, the second end 9B, and the third end 9C are each formed by a circular arc surface.
  • the radius of the arc surface of the first end portion 9A is R1.
  • the radius of the arc surface of the second end portion 9B is R2.
  • the radius of the arc surface of the third end portion 9C is R3.
  • these relationships are formed by R2> R1 and R3.
  • the relationship between R1 and R3 may be either larger or equal.
  • the distance to the outer peripheral surface 31A of the iron core piece 31 of the bridge portion 9 of the first iron core piece 311 is defined as a distance W1.
  • the distance to the outer peripheral surface 31A of the iron core piece 31 of the bridge portion 9 of the second iron core piece 312 is defined as a distance W2.
  • the distance W2 between the second core pieces 312 is shorter than the distance W1 between the first core pieces 311. Therefore, the leakage of magnetic flux can be reduced in the bridge portion 9 of the second iron core piece 312 than in the bridge portion 9 of the first iron core piece 311.
  • the iron core 30 is formed by laminating only the second iron core pieces 312 formed as described above, the magnetic flux leakage can be reduced, but the strength as the rotor 3 is weakened. Therefore, the number of laminated first core pieces 311 and the number of laminated second core pieces 312 and the number of laminated portions are such that the strength required for the rotor 3 can be ensured, and the second core pieces 312 are set to be used as much as possible. . Further, since the distance W2 of the second core piece 312 is formed shorter than the distance W1 of the first core piece 311, the insertion hole 7 of the second core piece 312 is formed larger than the insertion hole 7 of the first core piece 311. Is done.
  • an assembly method for the rotating electrical machine 1 according to the first embodiment configured as described above will be described.
  • an assembly method for the stator 2 will be described.
  • the electromagnetic steel sheet is punched to form the stator core 20.
  • the method of forming the stator core 20 is not limited to punching of electromagnetic steel sheets.
  • the coil 21 is assembled in an annular shape. Insulating paper is attached to the coil 21. Then, the coil 21 is inserted into the stator core 20 through insulating paper.
  • the method for assembling the coil 21 and the stator core 20 is not limited to this method.
  • the electromagnetic steel sheet is punched to form the first iron core piece 311 and the second iron core piece 312 of the rotor 3.
  • the method of forming the iron core piece 31 is not limited to punching of an electromagnetic steel sheet.
  • the number of the first iron core pieces 311 and the second iron core pieces 312 are set so that the strength required for the rotor 3 can be ensured, and the first iron core pieces 311 and the second iron core pieces 311 are arranged in the axial direction Y.
  • the core pieces 312 are stacked.
  • the first iron core piece 311 and the second iron core piece 312 are connected in the axial direction Y at the caulking portion 8.
  • the magnet 6 is inserted into the insertion hole 7 of the iron core 30.
  • FIG. 6 is a plan view showing a state in which the second iron core piece 312 is overlaid on the first iron core piece 311. As shown in FIG. 6, since the insertion hole 7 of the second core piece 312 is formed larger than the insertion hole 7 of the first core piece 311, the second core piece 312 is overlaid on the first core piece 311. In this case, a part of the first iron core piece 311 can be seen at the end of the insertion hole 7 of the second iron core piece 312.
  • FIG. 7 is a partial cross-sectional view obtained by cutting the stacked state in the axial direction Y as shown in FIG.
  • FIG. 7 shows an example in which the iron core 30 is configured by combining a plurality of first iron core pieces 311 and a plurality of second iron core pieces 312 respectively.
  • the first core piece 311 and the second core piece 312 are stacked separately in a region, or the first core piece 311 and the second core piece 312 are randomly stacked. As long as the strength required for the rotor 3 can be ensured, any combination may be used.
  • the shaft 4 is fixed to the iron core 30.
  • the rotating electrical machine 1 is manufactured by assembling the stator 2 and the rotor 3.
  • the torque generated by the rotor is improved by having the insertion hole and the magnet that are convex in the center direction of the iron core. Furthermore, the leakage of magnetic flux is reduced by combining two types of the first core piece and the second core piece having different distances between the bridge portions. Further, since the radius R2 of the second end portion is formed larger than the radius R1 of the first end portion and the radius R3 of the third end portion, the stress applied to the bridge portion is reduced when the rotor rotates. .
  • a flux barrier made of a non-magnetic material or space is configured, leakage of magnetic flux is prevented and torque is improved. Furthermore, the amount of magnets used for the rotating electrical machine can be reduced, and the cost can be reduced.
  • the present invention is not limited to this, and the second end portion 9B can be formed with a flat surface.
  • the same effects as those of the first embodiment can be obtained.
  • the present invention is not limited to this, and it may be formed by a plurality of arc surfaces. is there. In that case, when the rotor is rotating, concentration of stress applied to the bridge portion can be further reduced.
  • FIG. 8 is a partially enlarged view showing the configuration of the first iron core piece formed by the rotor according to Embodiment 2 of the present invention.
  • FIG. 9 is a partially enlarged view showing the configuration of the second iron core piece formed by the rotor according to the second embodiment of the present invention.
  • FIG. 10 is a plan view showing a state in which the first core piece shown in FIG. 8 and the second core piece shown in FIG. 9 are combined.
  • FIG. 11 is a perspective view showing a state in which the first core piece shown in FIG. 8 and the second core piece shown in FIG. 9 are combined.
  • the bridge portion 9 of the second core piece 312 includes an opening 33 that communicates from the insertion hole 7 to the outer peripheral surface 31 ⁇ / b> A of the core piece 31.
  • the opening 33 By forming the opening 33, the leakage of magnetic flux is further reduced.
  • the size of the opening 33 is appropriately determined in view of magnetic flux leakage and centrifugal force. In FIG. 9, it is formed around the second end 9 ⁇ / b> B of the bridge portion 9, but may be formed at any position as long as it communicates from the insertion hole 7 to the outer peripheral surface 31 ⁇ / b> A of the core piece 31. .
  • the first iron core piece 311 and the second iron core piece 312 serve as a connecting portion that is connected in the axial direction Y to a location on the outer peripheral surface 31 ⁇ / b> A side of the iron core piece 31 from the insertion hole 7.
  • a crimping portion 81 is provided. This caulking portion 81 is for preventing the opening 33 formed in the bridge portion 9 of the second iron core piece 312 from separating the portion on the outer peripheral surface 31 ⁇ / b> A side of the iron core piece 31 from the insertion hole 7.
  • the core piece 31 should just be connectable to the axial direction Y, for example, can also use the adhesion part comprised with an adhesive agent.
  • FIG. 10 is a plan view showing a state in which the second iron core piece 312 is overlaid on the first iron core piece 311.
  • FIG. 11 is a partial cross-sectional view obtained by cutting the stacked state in the axial direction Y as shown in FIG.
  • the same effect as that of the first embodiment can be obtained, and from the insertion hole to the outer peripheral surface of the iron core piece in the bridge portion. Since the communicating opening is provided, magnetic flux leakage can be further reduced.
  • the connecting portion for connecting in the axial direction is provided at a position on the outer peripheral surface side of the core piece from the insertion hole, the core pieces in the axial direction can be fixed, and the core pieces can be fixed without being scattered.
  • the opening 33 is formed in the bridge portion 9 of the second iron core piece 312
  • the present invention is not limited to this, and the bridge portion 9 of the first iron core piece 311 is not limited to this. It is also possible to form similar openings.
  • FIG. 12 is a partially enlarged view showing the configuration of the first iron core piece formed by the rotor according to Embodiment 3 of the present invention.
  • FIG. 13 is a partially enlarged view showing the configuration of the second iron core piece formed by the rotor according to Embodiment 3 of the present invention.
  • 14 is a plan view showing a state in which the first iron core piece shown in FIG. 12 and the second iron core piece shown in FIG. 13 are combined.
  • FIG. 15 is a perspective view showing a state in which the first core piece shown in FIG. 12 and the second core piece shown in FIG. 13 are combined.
  • the pole bridge portion 12 is provided at the pole center of the iron core piece 31, and in the third embodiment, the insertion hole 7 is arranged in the circumferential direction Z at the pole center of the insertion hole 7. Divide into two. A plurality of pole bridge portions 12 may be formed, and the insertion hole 7 may be divided into two or more in the circumferential direction Z. As shown in FIG. 12, the first iron core piece 311 is formed with a communication hole 13 that communicates with the insertion hole 7 divided by the pole bridge portion 12. The magnets 6 are formed in shapes that can be inserted into the divided insertion holes 7 respectively.
  • the iron core of the insertion hole 7 of the second iron core piece 312 is formed.
  • the outer peripheral surface 31A side of the piece 31 is separated, in the third embodiment, since the pole bridge portion 12 is formed, this portion is not separated. Therefore, even if the caulking portion 81 as shown in the second embodiment is not formed, the second iron core piece 312 does not come apart.
  • FIG. 14 is a plan view showing a state in which the first iron core piece 311 is overlaid on the second iron core piece 312.
  • FIG. 15 is a partial cross-sectional view of the stacked state as shown in FIG.
  • the iron core piece is provided with the pole bridge portion and the communication hole as well as the same effects as the above-described embodiments.
  • the magnetic flux leakage is reduced and, of course, when the opening is formed in the bridge portion, the core pieces are integrally formed at the pole bridge portion. Can be reduced.
  • FIG. 16 is a partially enlarged view showing the structure of the first iron core piece which the rotor according to the fourth embodiment of the present invention constitutes.
  • FIG. 17 is a partially enlarged view showing the configuration of the second iron core piece which the rotor according to the fourth embodiment of the present invention constitutes.
  • 18 is a plan view showing a state in which the first core piece shown in FIG. 16 and the second core piece shown in FIG. 17 are combined.
  • 19 is a sectional view showing a state in which the first core piece shown in FIG. 16 and the second core piece shown in FIG. 17 are combined.
  • the same parts as those in the above embodiments are denoted by the same reference numerals, and the description thereof is omitted.
  • the inner arc portion 7 ⁇ / b> B of the insertion hole 7 is formed with a protrusion 14.
  • the magnet 6 can be positioned and fixed in the insertion hole 7. Therefore, when the magnet 6 is inserted into the insertion hole 7, it can be installed without fixing the magnet 6 with an adhesive or the like.
  • FIG. 18 is a plan view showing a state where the second iron core piece 312 is overlaid on the first iron core piece 311.
  • FIG. 19 is a partial cross-sectional view obtained by cutting the stacked state in the axial direction Y as shown in FIG.
  • the magnet position accuracy is improved by the projections of the insertion holes as well as the same effects as the above-described embodiments. improves.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

According to the present invention: a plurality of first iron core pieces (311) and a plurality of second iron core pieces (312) each having an insertion hole (7), into which a magnet (6) is inserted, are formed so as to be stacked; a bridge part (9) is formed between an end, of the insertion hole (7), on the outer peripheral surface (31A) side of an iron core piece (31) and the outer peripheral surface (31A) of the iron core piece (31); the bridge part (9) has a first end (9A), a second end (9B), and a third end (9C); the first end (9A), the second end (9B), and the third end (9C) are formed such that the radius (R2) of an arc surface of the second end (9B) is larger than the radius (R1) of an arc surface of the first end (9A) and larger than the radius (R3) of an arc surface of the third end (9C); and each first iron core piece (311) and each second iron core piece (312) are formed such that the distance (W2), in the second iron core piece (312), from the bridge part (9) to the outer peripheral surface (31A) of the iron core piece (31) is shorter than the distance (W1), in the first iron core piece (311), from the bridge part (9) to the outer peripheral surface (31A) of the iron core piece (31).

Description

回転子および回転電機Rotor and rotating electric machine
　この発明は、磁束の漏れを低減できるのはもちろんのこと、組み立て性が向上し、低コストで構成可能である回転子および回転電機に関するものである。 The present invention relates to a rotor and a rotating electrical machine that can be reduced in magnetic flux leakage and can be assembled at low cost.
　近年、電動機や発電機として使用される回転電機は、小型化、高速回転化および高出力化が求められる。小型、高速回転化、および高出力の回転電機を実現するための１つの方法として、回転子に磁石を埋め込んだ形状の回転電機が提案されている。これは、リラクタンストルクを活用し、磁石によるマグネットトルクと合わせることで発生トルクを高める。 In recent years, rotating electrical machines used as electric motors and generators are required to be downsized, rotated at high speed, and increased in output. As one method for realizing a small-sized, high-speed rotating, and high-output rotating electric machine, a rotating electric machine having a shape in which a magnet is embedded in a rotor has been proposed. This utilizes the reluctance torque and increases the generated torque by combining it with the magnet torque generated by the magnet.
　しかし、回転子に磁石を埋め込んだ形状で回転電機の小型化、高出力化を達成する場合、ブリッジ部で磁束の漏れが生じるといった問題点があった。これに対し、例えば特許文献１には、ブリッジ部を切り取り、磁束の漏れを低減させ、さらに、切り取ったブリッジ部に非磁性体にてなる連結部材を挿入し、回転子の回転中に鉄心に加わる応力集中を緩和させることが提案されている。 However, when miniaturization and high output of the rotating electric machine are achieved with the magnet embedded in the rotor, there is a problem that magnetic flux leaks at the bridge portion. On the other hand, for example, in Patent Document 1, a bridge portion is cut to reduce leakage of magnetic flux, and a connecting member made of a non-magnetic material is inserted into the cut bridge portion, and the iron core is rotated during rotation of the rotor. It has been proposed to relieve the applied stress concentration.
特開２０１５－１９８４７５号公報JP-A-2015-198475
　従来の回転子は、切り欠いたブリッジ部に連結部材を挿入するため、部品数や工程数が増加し、組み立て性が低下し、コストが高くなるという問題点があった。 The conventional rotor has a problem in that the connecting member is inserted into the notched bridge portion, so that the number of parts and processes is increased, the assemblability is lowered, and the cost is increased.
　この発明は上記のような課題を解決するためになされたものであり、磁束の漏れを低減できるのはもちろんのこと、組み立て性が向上し、低コストで構成可能である回転子および回転電機を提供することを目的とする。 SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. A rotor and a rotating electrical machine that can be constructed at low cost with improved assemblability as well as reduced leakage of magnetic flux. The purpose is to provide.
　この発明の回転子は、
環状の鉄心片を軸方向に複数枚積層して形成する鉄心と、前記鉄心に形成された挿入孔と、前記挿入孔に設置された永久磁石とを備えた回転子において、
前記鉄心は、第一鉄心片および第二鉄心片をそれぞれ複数枚積層して形成され、
前記第一鉄心片および前記第二鉄心片は、それぞれ、
前記挿入孔および前記永久磁石が、前記鉄心の中心方向に凸形状に形成され、
前記挿入孔は、前記鉄心の径方向の外側の外側弧部と、前記鉄心の径方向の内側の内側弧部とを有し、
前記挿入孔の前記鉄心の外周面側の端部と、前記鉄心の外周面との間には、ブリッジ部が形成され、
前記ブリッジ部は、前記挿入孔の前記外側弧部に一端が連結された第一端部、前記挿入孔の前記内側弧部に一端が連結された第三端部と、前記第一端部の他端と前記第三端部の他端とを連結する第二端部とを有し、
前記第一端部、前記第二端部、および前記第三端部は、それぞれ円弧面にて形成され、
前記第一端部の円弧面の半径をＲ１と、前記第二端部の円弧面の半径をＲ２と、前記第三端部の円弧面の半径をＲ３とした場合、これらの関係は、Ｒ２＞Ｒ１およびＲ３にて形成され、
前記第一鉄心片および前記第二鉄心片は、
前記ブリッジ部の前記鉄心の外周面までの距離が、前記第二鉄心片が前記第一鉄心片より短く形成される。
　また、この発明の回転子は、
環状の鉄心片を軸方向に複数枚積層して形成する鉄心と、前記鉄心に形成された挿入孔と、前記挿入孔に設置された永久磁石とを備えた回転子において、
前記鉄心は、第一鉄心片および第二鉄心片をそれぞれ複数枚積層して形成され、
前記第一鉄心片および前記第二鉄心片は、それぞれ、
前記挿入孔および前記永久磁石が、前記鉄心の中心方向に凸形状に形成され、
前記挿入孔は、前記鉄心の径方向の外側の外側弧部と、前記鉄心の径方向の内側の内側弧部とを有し、
前記挿入孔の前記鉄心の外周面側の端部と、前記鉄心の外周面との間には、ブリッジ部が形成され、
前記ブリッジ部は、前記挿入孔の前記外側弧部に一端が連結された第一端部、前記挿入孔の前記内側弧部に一端が連結された第三端部と、前記第一端部の他端と前記第三端部の他端とを連結する第二端部とを有し、
前記第一端部および前記第三端部は、それぞれ円弧面にて形成され、
前記第二端部は、平面にて形成され、
前記第一鉄心片および前記第二鉄心片とは、
前記ブリッジ部の前記鉄心の外周面までの距離が、前記第二鉄心片が前記第一鉄心片より短く形成される。
　また、この発明の回転電機は、
上記に示した回転子と、
前記回転子と同軸上に配置された固定子とを備える。 The rotor of the present invention is
In a rotor including an iron core formed by laminating a plurality of annular core pieces in the axial direction, an insertion hole formed in the iron core, and a permanent magnet installed in the insertion hole,
The iron core is formed by laminating a plurality of first iron core pieces and second iron core pieces,
The first iron core piece and the second iron core piece are respectively
The insertion hole and the permanent magnet are formed in a convex shape in the center direction of the iron core,
The insertion hole has an outer arc portion on the outer side in the radial direction of the iron core, and an inner arc portion on the inner side in the radial direction of the iron core,
Between the end of the insertion hole on the outer peripheral surface side of the iron core and the outer peripheral surface of the iron core, a bridge portion is formed,
The bridge portion includes a first end portion having one end connected to the outer arc portion of the insertion hole, a third end portion having one end connected to the inner arc portion of the insertion hole, and a first end portion. A second end connecting the other end and the other end of the third end;
The first end, the second end, and the third end are each formed by a circular arc surface,
When the radius of the arc surface of the first end portion is R1, the radius of the arc surface of the second end portion is R2, and the radius of the arc surface of the third end portion is R3, these relationships are expressed as R2 > R1 and R3,
The first iron core piece and the second iron core piece are:
The distance from the bridge portion to the outer peripheral surface of the iron core is such that the second iron core piece is shorter than the first iron core piece.
The rotor of the present invention is
In a rotor including an iron core formed by laminating a plurality of annular core pieces in the axial direction, an insertion hole formed in the iron core, and a permanent magnet installed in the insertion hole,
The iron core is formed by laminating a plurality of first iron core pieces and second iron core pieces,
The first iron core piece and the second iron core piece are respectively
The insertion hole and the permanent magnet are formed in a convex shape in the center direction of the iron core,
The insertion hole has an outer arc portion on the outer side in the radial direction of the iron core, and an inner arc portion on the inner side in the radial direction of the iron core,
Between the end of the insertion hole on the outer peripheral surface side of the iron core and the outer peripheral surface of the iron core, a bridge portion is formed,
The bridge portion includes a first end portion having one end connected to the outer arc portion of the insertion hole, a third end portion having one end connected to the inner arc portion of the insertion hole, and a first end portion. A second end connecting the other end and the other end of the third end;
The first end and the third end are each formed by a circular arc surface,
The second end is formed in a plane,
The first iron core piece and the second iron core piece are:
The distance from the bridge portion to the outer peripheral surface of the iron core is such that the second iron core piece is shorter than the first iron core piece.
The rotating electrical machine of the present invention is
The rotor shown above,
A stator disposed coaxially with the rotor.
　この発明の回転子および回転電機によれば、
磁束の漏れを低減できるのはもちろんのこと、組み立て性が向上し、低コストで構成可能である。 According to the rotor and the rotating electrical machine of the present invention,
As a matter of course, the leakage of magnetic flux can be reduced, and the assemblability can be improved and it can be configured at low cost.
この発明の実施の形態１における回転電機の構成を示す斜視図である。It is a perspective view which shows the structure of the rotary electric machine in Embodiment 1 of this invention. 図１に示した回転電機の構成を示す上面図である。It is a top view which shows the structure of the rotary electric machine shown in FIG. 図２に示した回転電機の回転子の構成を示す上面図である。It is a top view which shows the structure of the rotor of the rotary electric machine shown in FIG. 図３の回転子の構成する第一鉄心片の構成を示す部分拡大図である。It is the elements on larger scale which show the structure of the 1st iron core piece which the rotor of FIG. 3 comprises. 図３の回転子の構成する第二鉄心片の構成を示す部分拡大図である。It is the elements on larger scale which show the structure of the 2nd core piece which the rotor of FIG. 3 comprises. 図４に示した第一鉄心片と図５に示した第二鉄心片を組み合わせた状態を示す平面図である。It is a top view which shows the state which combined the 1st iron core piece shown in FIG. 4, and the 2nd iron core piece shown in FIG. 図４に示した第一鉄心片と図５に示した第二鉄心片を組み合わせた状態を示す断面図である。It is sectional drawing which shows the state which combined the 1st iron core piece shown in FIG. 4, and the 2nd iron core piece shown in FIG. この発明の実施の形態２における回転子の構成する第一鉄心片の構成を示す部分拡大図である。It is the elements on larger scale which show the structure of the 1st iron core piece which the rotor in Embodiment 2 of this invention comprises. この発明の実施の形態２における回転子の構成する第二鉄心片の構成を示す部分拡大図である。It is the elements on larger scale which show the structure of the 2nd core piece which the rotor in Embodiment 2 of this invention comprises. 図８に示した第一鉄心片と図９に示した第二鉄心片を組み合わせた状態を示す平面図である。It is a top view which shows the state which combined the 1st iron core piece shown in FIG. 8, and the 2nd iron core piece shown in FIG. 図８に示した第一鉄心片と図９に示した第二鉄心片を組み合わせた状態を示す斜視図である。It is a perspective view which shows the state which combined the 1st iron core piece shown in FIG. 8, and the 2nd iron core piece shown in FIG. この発明の実施の形態３における回転子の構成する第一鉄心片の構成を示す部分拡大図である。It is a partial enlarged view which shows the structure of the 1st iron core piece which the rotor in Embodiment 3 of this invention comprises. この発明の実施の形態３における回転子の構成する第二鉄心片の構成を示す部分拡大図である。It is a partial enlarged view which shows the structure of the 2nd core piece which the rotor in Embodiment 3 of this invention comprises. 図１２に示した第一鉄心片と図１３に示した第二鉄心片を組み合わせた状態を示す平面図である。It is a top view which shows the state which combined the 1st iron core piece shown in FIG. 12, and the 2nd iron core piece shown in FIG. 図１２に示した第一鉄心片と図１３に示した第二鉄心片を組み合わせた状態を示す斜視図である。It is a perspective view which shows the state which combined the 1st iron core piece shown in FIG. 12, and the 2nd iron core piece shown in FIG. この発明の実施の形態４における回転子の構成する第一鉄心片の構成を示す部分拡大図である。It is the elements on larger scale which show the structure of the 1st iron core piece which the rotor in Embodiment 4 of this invention comprises. この発明の実施の形態４における回転子の構成する第二鉄心片の構成を示す部分拡大図である。It is the elements on larger scale which show the structure of the 2nd core piece which the rotor in Embodiment 4 of this invention comprises. 図１６に示した第一鉄心片と図１７に示した第二鉄心片を組み合わせた状態を示す平面図である。It is a top view which shows the state which combined the 1st iron core piece shown in FIG. 16, and the 2nd iron core piece shown in FIG. 図１６に示した第一鉄心片と図１７に示した第二鉄心片を組み合わせた状態を示す断面図である。It is sectional drawing which shows the state which combined the 1st iron core piece shown in FIG. 16, and the 2nd iron core piece shown in FIG.
実施の形態１．
　以下、本願発明の実施の形態について説明する。
図１はこの発明の実施の形態１における回転電機の構成を示す斜視図である。
図２は図１に示した回転電機の構成を示す上面図である。
図３は図２に示した回転電機の回転子の構成を示す上面図である。
図４は図３の回転子の構成する第一鉄心片の構成を示す部分拡大図である。 Embodiment 1 FIG.
Embodiments of the present invention will be described below.
1 is a perspective view showing a configuration of a rotating electrical machine according to Embodiment 1 of the present invention.
FIG. 2 is a top view showing the configuration of the rotating electrical machine shown in FIG.
FIG. 3 is a top view showing the configuration of the rotor of the rotating electrical machine shown in FIG.
FIG. 4 is a partially enlarged view showing the configuration of the first iron core piece constituting the rotor of FIG.
　図５は図３の回転子の構成する第二鉄心片の構成を示す部分拡大図である。
図６は図４に示した第一鉄心片と図５に示した第二鉄心片を組み合わせた状態を示す平面図である。
図７は図４に示した第一鉄心片と図５に示した第二鉄心片を組み合わせた状態を示す断面図である。 FIG. 5 is a partially enlarged view showing the configuration of the second core piece that the rotor of FIG. 3 configures.
FIG. 6 is a plan view showing a state in which the first core piece shown in FIG. 4 and the second core piece shown in FIG. 5 are combined.
FIG. 7 is a cross-sectional view showing a state in which the first core piece shown in FIG. 4 and the second core piece shown in FIG. 5 are combined.
　本実施の形態１では、８極４８スロットの永久磁石型の回転電機１について説明する。但し、回転電機１の極数およびスロット数は適宜増減可能である。また、以下の説明において、回転電機１における各方向を、周方向Ｚ、軸方向Ｙ、径方向Ｘ、径方向Ｘの外側Ｘ１、径方向Ｘの内側Ｘ２としてそれぞれ示す。よって、固定子２および回転子３においても、これらの方向は同一方向となる。 In the first embodiment, an 8-pole 48-slot permanent magnet type rotating electrical machine 1 will be described. However, the number of poles and the number of slots of the rotating electrical machine 1 can be appropriately increased or decreased. In the following description, each direction in the rotating electrical machine 1 is shown as a circumferential direction Z, an axial direction Y, a radial direction X, an outer side X1 in the radial direction X, and an inner side X2 in the radial direction X. Therefore, also in the stator 2 and the rotor 3, these directions are the same direction.
　図１および図２において、回転電機１の構成について説明する。回転電機１は固定子２と回転子３とシャフト４とで構成される。回転電機１は、外径側から固定子２、回転子３、シャフト４の順番に配置される。固定子２と回転子３との間には空隙であるエアギャップ５を有する。このエアギャップ５は例えば０．１ｍｍ～２．５ｍｍにて形成される。 1 and 2, the configuration of the rotating electrical machine 1 will be described. The rotating electrical machine 1 includes a stator 2, a rotor 3, and a shaft 4. The rotating electrical machine 1 is arranged in the order of the stator 2, the rotor 3, and the shaft 4 from the outer diameter side. Between the stator 2 and the rotor 3, there is an air gap 5 which is a gap. The air gap 5 is formed with a thickness of 0.1 mm to 2.5 mm, for example.
　固定子２は固定子鉄心２０とコイル２１とを備える。固定子鉄心２０は円環状に形成される。固定子鉄心２０は、例えば電磁鋼板を軸方向Ｙに積層している。但し、電磁鋼板に限られるものではない。回転子３は、軸心位置に挿通されたシャフト４に固定された鉄心３０を有している。鉄心３０は固定子２の内側に配置され、永久磁石（以下、磁石として示す）６を備えた磁石型回転子である。シャフト４は、例えば、焼きばめや圧入等にて鉄心３０に固定される。また、回転電機１は分布巻き、集中巻きのどちらでも可能である。 The stator 2 includes a stator core 20 and a coil 21. The stator core 20 is formed in an annular shape. The stator core 20 is formed by, for example, laminating electromagnetic steel plates in the axial direction Y. However, it is not limited to electromagnetic steel sheets. The rotor 3 has an iron core 30 fixed to the shaft 4 inserted through the axial center position. The iron core 30 is a magnet-type rotor that is disposed inside the stator 2 and includes a permanent magnet (hereinafter referred to as a magnet) 6. The shaft 4 is fixed to the iron core 30 by, for example, shrink fitting or press fitting. The rotating electrical machine 1 can be either distributed winding or concentrated winding.
　次に、図３を用いて回転子３の構成について説明する。回転子３は鉄心３０と、挿入孔７と、磁石６とから構成される。鉄心３０は磁性材である鉄心片３１を軸方向Ｙに複数枚積層して形成される。例えば、鉄心片３１は電磁鋼板にて形成される。但し、電磁鋼板に限られるものではない。電磁鋼板の厚さは、例えば０．１ｍｍ～１．０ｍｍのものを使用する場合が多い。複数枚の鉄心片３１は、連結部としてのカシメ部８により軸方向Ｙに連結される。但し、カシメ部８は便宜上、図６のみに示している。このカシメ部８は、鉄心片３１同士がばらけることなく、カシメ部８により軸方向Ｙに隙間が形成されなければ、形成箇所および形成個数はいずれでもよい。また、カシメ部８でなくても鉄心片３１が軸方向Ｙに連結可能であればよく、例えば接着剤にて構成される接着部を用いることも可能である。 Next, the configuration of the rotor 3 will be described with reference to FIG. The rotor 3 includes an iron core 30, an insertion hole 7, and a magnet 6. The iron core 30 is formed by laminating a plurality of iron core pieces 31 that are magnetic materials in the axial direction Y. For example, the iron core piece 31 is formed of an electromagnetic steel plate. However, it is not limited to electromagnetic steel sheets. In many cases, the thickness of the electromagnetic steel sheet is, for example, 0.1 mm to 1.0 mm. The plurality of iron core pieces 31 are connected in the axial direction Y by a crimping portion 8 as a connecting portion. However, the crimping portion 8 is shown only in FIG. 6 for convenience. As long as the caulking portion 8 does not separate the iron core pieces 31 and no gap is formed in the axial direction Y by the caulking portion 8, the formation portion and the number of formation may be any. Moreover, it is only necessary that the iron core piece 31 can be connected in the axial direction Y even if it is not the caulking portion 8, and for example, it is possible to use an adhesive portion made of an adhesive.
　磁石６は回転電機１、すなわち鉄心３０の中心方向に凸形状に構成される。磁石６の外周側を外側弧部６Ａとし、磁石６の内周側を内側弧部６Ｂとする。磁石６の外側弧部６Ａと磁石６の内側弧部６Ｂとの両端は、平面または曲面で連結されている。挿入孔７は回転電機１、すなわち鉄心３０の中心方向に凸形状に構成される。挿入孔７の鉄心３０の径方向Ｘの外側Ｘ１を外側弧部７Ａとする。挿入孔７の鉄心３０の径方向Ｘの内側Ｘ２を内側弧部７Ｂとする。 The magnet 6 is formed in a convex shape in the center direction of the rotating electrical machine 1, that is, the iron core 30. The outer peripheral side of the magnet 6 is an outer arc portion 6A, and the inner peripheral side of the magnet 6 is an inner arc portion 6B. Both ends of the outer arc portion 6A of the magnet 6 and the inner arc portion 6B of the magnet 6 are connected by a plane or a curved surface. The insertion hole 7 is formed in a convex shape in the central direction of the rotating electrical machine 1, that is, the iron core 30. An outer side X1 in the radial direction X of the iron core 30 of the insertion hole 7 is defined as an outer arc portion 7A. An inner side X2 in the radial direction X of the iron core 30 of the insertion hole 7 is defined as an inner arc portion 7B.
　そして、挿入孔７は磁石６が挿入可能な形状にて構成される。よって、挿入孔７の外側弧部７Ａには、磁石６の外側弧部６Ａが沿う形状にて形成される。挿入孔７の内側弧部７Ｂには磁石６の内側弧部６Ｂが沿う形状にて形成される。また、磁石６の外周には接着材等が塗布される。磁石６と挿入孔７とは接着材により固定される。さらに、挿入孔７内には磁石６が設置されていない部分として、フラックスバリア１０が形成される。このフラックスバリア１０は、非磁性体または空間にて構成される。 And the insertion hole 7 is configured in a shape into which the magnet 6 can be inserted. Therefore, the outer arc portion 7 </ b> A of the insertion hole 7 is formed in a shape along which the outer arc portion 6 </ b> A of the magnet 6 extends. The inner arc portion 7B of the insertion hole 7 is formed in a shape along which the inner arc portion 6B of the magnet 6 is aligned. An adhesive or the like is applied to the outer periphery of the magnet 6. The magnet 6 and the insertion hole 7 are fixed with an adhesive. Further, a flux barrier 10 is formed in the insertion hole 7 as a portion where the magnet 6 is not installed. The flux barrier 10 is composed of a nonmagnetic material or a space.
　次に、図４および図５を用いて鉄心片３１としての第一鉄心片３１１および第二鉄心片３１２の形状について説明する。尚、本実施の形態１の説明において、鉄心片３１と示すときは、第一鉄心片３１１および第二鉄心片３１２の全てを指すものとして示している。まず、第一鉄心片３１１と第二鉄心片３１２との形状の共通部分について、先の鉄心片３１にて示した以外の部分について説明する。挿入孔７の鉄心片３１の外周面３１Ａ側の端部と、鉄心片３１の外周面３１Ａとの間には、ブリッジ部９が形成される。尚、鉄心片３１の外周面３１Ａは、鉄心３０の外周面と同様である。 Next, the shape of the first core piece 311 and the second core piece 312 as the core piece 31 will be described with reference to FIGS. 4 and 5. In the description of the first embodiment, when the iron core piece 31 is indicated, all the first iron core pieces 311 and the second iron core pieces 312 are indicated. First, the parts other than those shown in the previous iron core piece 31 will be described with respect to the common parts of the shapes of the first iron core piece 311 and the second iron core piece 312. A bridge portion 9 is formed between the end of the insertion hole 7 on the outer peripheral surface 31 </ b> A side of the core piece 31 and the outer peripheral surface 31 </ b> A of the core piece 31. The outer peripheral surface 31 </ b> A of the iron core piece 31 is the same as the outer peripheral surface of the iron core 30.
　ブリッジ部９は、第一端部９Ａ、第二端部９Ｂおよび第三端部９Ｃを有する。第一端部９Ａは、挿入孔７の外側弧部７Ａに一端が連結される。第三端部９Ｃは、挿入孔７の内側弧部７Ｂに一端が連結される。第二端部９Ｂは、第一端部９Ａの他端と、第三端部９Ｃの他端とを連結する。第一端部９Ａ、第二端部９Ｂ、および第三端部９Ｃは、それぞれ円弧面にて形成される。ここで、第一端部９Ａの円弧面の半径をＲ１とする。第二端部９Ｂの円弧面の半径をＲ２とする。第三端部９Ｃの円弧面の半径をＲ３とする。この場合、これらの関係は、Ｒ２＞Ｒ１およびＲ３にて形成される。尚、Ｒ１とＲ３との関係は、どちらかが大きい、または、等しくてもよい。 The bridge portion 9 has a first end portion 9A, a second end portion 9B, and a third end portion 9C. One end of the first end 9 </ b> A is connected to the outer arc 7 </ b> A of the insertion hole 7. One end of the third end portion 9 </ b> C is connected to the inner arc portion 7 </ b> B of the insertion hole 7. The second end 9B connects the other end of the first end 9A and the other end of the third end 9C. The first end 9A, the second end 9B, and the third end 9C are each formed by a circular arc surface. Here, the radius of the arc surface of the first end portion 9A is R1. The radius of the arc surface of the second end portion 9B is R2. The radius of the arc surface of the third end portion 9C is R3. In this case, these relationships are formed by R2> R1 and R3. In addition, the relationship between R1 and R3 may be either larger or equal.
　次に、第一鉄心片３１１と第二鉄心片３１２との形状の異なる部分について説明する。第一鉄心片３１１のブリッジ部９の鉄心片３１の外周面３１Ａまでの距離を距離Ｗ１とする。第二鉄心片３１２のブリッジ部９の鉄心片３１の外周面３１Ａまでの距離を距離Ｗ２とする。そして、第二鉄心片３１２の距離Ｗ２が第一鉄心片３１１の距離Ｗ１より短く形成されている。よって、第二鉄心片３１２のブリッジ部９が、第一鉄心片３１１のブリッジ部９より磁束の漏れが低減できる。 Next, the different parts of the shape of the first core piece 311 and the second core piece 312 will be described. The distance to the outer peripheral surface 31A of the iron core piece 31 of the bridge portion 9 of the first iron core piece 311 is defined as a distance W1. The distance to the outer peripheral surface 31A of the iron core piece 31 of the bridge portion 9 of the second iron core piece 312 is defined as a distance W2. The distance W2 between the second core pieces 312 is shorter than the distance W1 between the first core pieces 311. Therefore, the leakage of magnetic flux can be reduced in the bridge portion 9 of the second iron core piece 312 than in the bridge portion 9 of the first iron core piece 311.
　このように形成された、第二鉄心片３１２のみを積層して鉄心３０を形成すると、磁束の漏れは低減できるものの、回転子３としての強度が弱くなる。よって、第一鉄心片３１１および第二鉄心片３１２の積層枚数および積層箇所は、回転子３として必要となる強度を確保できる程度であって、第二鉄心片３１２をなるべく多く使用するよう設定する。また、第二鉄心片３１２の距離Ｗ２が第一鉄心片３１１の距離Ｗ１より短く形成されているため、第二鉄心片３１２の挿入孔７は、第一鉄心片３１１の挿入孔７より大きく形成される。 When the iron core 30 is formed by laminating only the second iron core pieces 312 formed as described above, the magnetic flux leakage can be reduced, but the strength as the rotor 3 is weakened. Therefore, the number of laminated first core pieces 311 and the number of laminated second core pieces 312 and the number of laminated portions are such that the strength required for the rotor 3 can be ensured, and the second core pieces 312 are set to be used as much as possible. . Further, since the distance W2 of the second core piece 312 is formed shorter than the distance W1 of the first core piece 311, the insertion hole 7 of the second core piece 312 is formed larger than the insertion hole 7 of the first core piece 311. Is done.
　次に、上記のように構成された実施の形態１の回転電機１の組み立て工法について説明する。最初に固定子２の組み立て工法について説明する。まず、電磁鋼板を打ち抜いて固定子鉄心２０を形成する。但し、固定子鉄心２０の形成方法は、電磁鋼板の打ち抜きに限られるものではない。円環状にコイル２１を組み立てる。コイル２１に絶縁紙を取り付ける。そして、絶縁紙を介してコイル２１を固定子鉄心２０に挿入する。尚、コイル２１や固定子鉄心２０の組み立て方法はこの方法に限られるものではない。 Next, an assembly method for the rotating electrical machine 1 according to the first embodiment configured as described above will be described. First, an assembly method for the stator 2 will be described. First, the electromagnetic steel sheet is punched to form the stator core 20. However, the method of forming the stator core 20 is not limited to punching of electromagnetic steel sheets. The coil 21 is assembled in an annular shape. Insulating paper is attached to the coil 21. Then, the coil 21 is inserted into the stator core 20 through insulating paper. The method for assembling the coil 21 and the stator core 20 is not limited to this method.
　次に、回転子３の組み立て工法について説明する。まず、電磁鋼板を打ち抜いて回転子３の第一鉄心片３１１および第二鉄心片３１２をそれぞれ形成する。但し、鉄心片３１の形成方法は、電磁鋼板の打ち抜きに限られるものではない。次に、第一鉄心片３１１および第二鉄心片３１２の積層枚数および積層箇所を、回転子３として必要となる強度を確保できる程度に設定し、軸方向Ｙに第一鉄心片３１１と第二鉄心片３１２とを積層する。第一鉄心片３１１と第二鉄心片３１２とはカシメ部８にて軸方向Ｙが連結される。鉄心３０の挿入孔７中に磁石６を挿入する。 Next, the assembly method of the rotor 3 will be described. First, the electromagnetic steel sheet is punched to form the first iron core piece 311 and the second iron core piece 312 of the rotor 3. However, the method of forming the iron core piece 31 is not limited to punching of an electromagnetic steel sheet. Next, the number of the first iron core pieces 311 and the second iron core pieces 312 are set so that the strength required for the rotor 3 can be ensured, and the first iron core pieces 311 and the second iron core pieces 311 are arranged in the axial direction Y. The core pieces 312 are stacked. The first iron core piece 311 and the second iron core piece 312 are connected in the axial direction Y at the caulking portion 8. The magnet 6 is inserted into the insertion hole 7 of the iron core 30.
　図６は、第一鉄心片３１１の上に、第二鉄心片３１２を重ねた状態を示す平面図である。図６に示すように、第二鉄心片３１２の挿入孔７が第一鉄心片３１１の挿入孔７より大きく形成されるため、第一鉄心片３１１の上に、第二鉄心片３１２を重ねた場合、第二鉄心片３１２の挿入孔７の端部に、第一鉄心片３１１の一部が見える状態となる。図７は図６に示したように重ねた状態を軸方向Ｙに切断した部分断面図である。 FIG. 6 is a plan view showing a state in which the second iron core piece 312 is overlaid on the first iron core piece 311. As shown in FIG. 6, since the insertion hole 7 of the second core piece 312 is formed larger than the insertion hole 7 of the first core piece 311, the second core piece 312 is overlaid on the first core piece 311. In this case, a part of the first iron core piece 311 can be seen at the end of the insertion hole 7 of the second iron core piece 312. FIG. 7 is a partial cross-sectional view obtained by cutting the stacked state in the axial direction Y as shown in FIG.
　尚、図７においては、鉄心３０を第一鉄心片３１１と第二鉄心片３１２とをそれぞれ複数枚ずつ組み合わせて構成する例を示している。この組み合わせの構成はこれ以外に、第一鉄心片３１１と第二鉄心片３１２とを領域を分けて積層する場合、また、第一鉄心片３１１および第二鉄心片３１２をランダムに積層する場合など、回転子３として必要となる強度を確保できる程度であれば、どのように組み合わせてもよい。次に、鉄心３０にシャフト４を固定する。そして、固定子２と回転子３とを組み立てて回転電機１を製造する。 Note that FIG. 7 shows an example in which the iron core 30 is configured by combining a plurality of first iron core pieces 311 and a plurality of second iron core pieces 312 respectively. In addition to this configuration, the first core piece 311 and the second core piece 312 are stacked separately in a region, or the first core piece 311 and the second core piece 312 are randomly stacked. As long as the strength required for the rotor 3 can be ensured, any combination may be used. Next, the shaft 4 is fixed to the iron core 30. Then, the rotating electrical machine 1 is manufactured by assembling the stator 2 and the rotor 3.
　上記のように構成された実施の形態１の回転子によれば、鉄心の中心方向に凸形状となる挿入孔および磁石を有することで、回転子が作るトルクが向上する。
　さらに、ブリッジ部の距離が異なる二種類の第一鉄心片および第二鉄心片を組み合わせることで、磁束の漏れが低減する。
　さらに、第二端部の半径Ｒ２が第一端部の半径Ｒ１および第三端部の半径Ｒ３よりも大きく形成されていることで、回転子が回転するとき、ブリッジ部に加わる応力が低減する。 According to the rotor of the first embodiment configured as described above, the torque generated by the rotor is improved by having the insertion hole and the magnet that are convex in the center direction of the iron core.
Furthermore, the leakage of magnetic flux is reduced by combining two types of the first core piece and the second core piece having different distances between the bridge portions.
Further, since the radius R2 of the second end portion is formed larger than the radius R1 of the first end portion and the radius R3 of the third end portion, the stress applied to the bridge portion is reduced when the rotor rotates. .
　また、非磁性体または空間にてなるフラックスバリアを構成するので、磁束の漏れを防ぎ、トルクが向上する。さらに、回転電機に使用する磁石の量を減らすことができ、コストが低減できる。 Also, since a flux barrier made of a non-magnetic material or space is configured, leakage of magnetic flux is prevented and torque is improved. Furthermore, the amount of magnets used for the rotating electrical machine can be reduced, and the cost can be reduced.
　上記実施の形態１においては、第二端部９Ｂを円弧面にて形成する場合を示したが、これに限られることはなく、第二端部９Ｂを平面にて形成することも可能であり、上記実施の形態１と同様の効果を奏することができる。 In the first embodiment, the case where the second end portion 9B is formed with an arc surface has been shown, but the present invention is not limited to this, and the second end portion 9B can be formed with a flat surface. The same effects as those of the first embodiment can be obtained.
　また、上記実施の形態１においては、第二端部９Ｂを１つの円弧面にて形成する場合について示したが、これに限られることはなく、複数の円弧面にて形成することも可能である。その場合、回転子が回転しているとき、ブリッジ部に加わる応力の集中がさらに低減できる。 In the first embodiment, the case where the second end portion 9B is formed by one arc surface has been described. However, the present invention is not limited to this, and it may be formed by a plurality of arc surfaces. is there. In that case, when the rotor is rotating, concentration of stress applied to the bridge portion can be further reduced.
　また、上記実施の形態１では径方向には１層の挿入孔７および磁石６を配置する例を示しているが、径方向に複数層の挿入孔７および磁石６を配置した形状にて形成してもよい。 In the first embodiment, an example in which one layer of insertion holes 7 and magnets 6 are arranged in the radial direction is shown. However, a plurality of layers of insertion holes 7 and magnets 6 are arranged in the radial direction. May be.
　尚、本実施の形態１にて示した、鉄心片３１におけるＲ１、Ｒ２、Ｒ３の関係、および、第一鉄心片３１１のＷ１および第二鉄心片３１２のＷ２の関係は、以下の実施の形態においても同様であるため、その説明は適宜省略する。 The relationship between R1, R2, and R3 in the iron core piece 31 and the relationship between W1 of the first iron core piece 311 and W2 of the second iron core piece 312 shown in the first embodiment are as follows. Since the same applies to, the description thereof will be omitted as appropriate.
実施の形態２．
　本実施の形態２は、上記実施の形態１と異なり第二鉄心片３１２のブリッジ部９に開口部３３を備える例について説明する。
図８はこの発明の実施の形態２における回転子の構成する第一鉄心片の構成を示す部分拡大図である。
図９はこの発明の実施の形態２における回転子の構成する第二鉄心片の構成を示す部分拡大図である。
図１０は図８に示した第一鉄心片と図９に示した第二鉄心片を組み合わせた状態を示す平面図である。
図１１は図８に示した第一鉄心片と図９に示した第二鉄心片を組み合わせた状態を示す斜視図である。 Embodiment 2. FIG.
In the second embodiment, an example in which the opening portion 33 is provided in the bridge portion 9 of the second iron core piece 312 will be described, unlike the first embodiment.
FIG. 8 is a partially enlarged view showing the configuration of the first iron core piece formed by the rotor according to Embodiment 2 of the present invention.
FIG. 9 is a partially enlarged view showing the configuration of the second iron core piece formed by the rotor according to the second embodiment of the present invention.
FIG. 10 is a plan view showing a state in which the first core piece shown in FIG. 8 and the second core piece shown in FIG. 9 are combined.
FIG. 11 is a perspective view showing a state in which the first core piece shown in FIG. 8 and the second core piece shown in FIG. 9 are combined.
　図において、上記実施の形態１と同様の部分は同一符号を付して説明を省略する。図９に示すように、第二鉄心片３１２のブリッジ部９には、挿入孔７から鉄心片３１の外周面３１Ａまで連通する開口部３３を備える。開口部３３が形成されることにより、磁束の漏れはさらに低減する。開口部３３の大きさは、磁束の漏れおよび遠心力を鑑みて適宜決定されるものである。また、図９においては、ブリッジ部９の第二端部９Ｂの辺りに形成されているが、挿入孔７から鉄心片３１の外周面３１Ａまで連通すれば、いずれの位置に形成してもよい。 In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. As shown in FIG. 9, the bridge portion 9 of the second core piece 312 includes an opening 33 that communicates from the insertion hole 7 to the outer peripheral surface 31 </ b> A of the core piece 31. By forming the opening 33, the leakage of magnetic flux is further reduced. The size of the opening 33 is appropriately determined in view of magnetic flux leakage and centrifugal force. In FIG. 9, it is formed around the second end 9 </ b> B of the bridge portion 9, but may be formed at any position as long as it communicates from the insertion hole 7 to the outer peripheral surface 31 </ b> A of the core piece 31. .
　また、図８および図９に示すように、第一鉄心片３１１および第二鉄心片３１２は、挿入孔７より鉄心片３１の外周面３１Ａ側の箇所に軸方向Ｙに連結する連結部としてのカシメ部８１を備える。このカシメ部８１は、第二鉄心片３１２のブリッジ部９に形成された開口部３３により、挿入孔７より鉄心片３１の外周面３１Ａ側の部分がばらけるのを防止するためである。尚、カシメ部８１でなくても、鉄心片３１が軸方向Ｙに連結可能であればよく、例えば接着剤にて構成される接着部を用いることも可能である。 As shown in FIGS. 8 and 9, the first iron core piece 311 and the second iron core piece 312 serve as a connecting portion that is connected in the axial direction Y to a location on the outer peripheral surface 31 </ b> A side of the iron core piece 31 from the insertion hole 7. A crimping portion 81 is provided. This caulking portion 81 is for preventing the opening 33 formed in the bridge portion 9 of the second iron core piece 312 from separating the portion on the outer peripheral surface 31 </ b> A side of the iron core piece 31 from the insertion hole 7. In addition, even if it is not the crimping part 81, the core piece 31 should just be connectable to the axial direction Y, for example, can also use the adhesion part comprised with an adhesive agent.
　次に、上記のように構成された実施の形態２の回転電機１および回転子３の組み立て工法は、上記実施の形態１と同様に行うことができ、第一鉄心片３１１および第二鉄心片３１２の積層枚数および積層箇所は、回転子３として必要となる強度を確保できる程度に設定し、軸方向Ｙに第一鉄心片３１１と第二鉄心片３１２とを積層する。図１０は、第一鉄心片３１１の上に、第二鉄心片３１２を重ねた状態を示す平面図である。図１１は図１０に示したように重ねた状態を軸方向Ｙに切断した部分断面図である。 Next, the assembly method of the rotating electrical machine 1 and the rotor 3 of the second embodiment configured as described above can be performed in the same manner as in the first embodiment, and the first iron core piece 311 and the second iron core piece. The number of laminated layers 312 and the number of laminated portions are set to such an extent that the strength required for the rotor 3 can be ensured, and the first iron core pieces 311 and the second iron core pieces 312 are laminated in the axial direction Y. FIG. 10 is a plan view showing a state in which the second iron core piece 312 is overlaid on the first iron core piece 311. FIG. 11 is a partial cross-sectional view obtained by cutting the stacked state in the axial direction Y as shown in FIG.
　上記のように構成された実施の形態２の回転子および回転電機によれば、上記実施の形態１と同様の効果を奏するのはもちろんのこと、ブリッジ部に挿入孔から鉄心片の外周面まで連通する開口部を備えたので、磁束の漏れをさらに低減できる。 According to the rotor and the rotating electrical machine of the second embodiment configured as described above, the same effect as that of the first embodiment can be obtained, and from the insertion hole to the outer peripheral surface of the iron core piece in the bridge portion. Since the communicating opening is provided, magnetic flux leakage can be further reduced.
　また、挿入孔より鉄心片の外周面側の箇所に軸方向に連結する連結部を備えたので、軸方向の鉄心片同士の固定を可能とし、鉄心片がばらけずに固定できる。 In addition, since the connecting portion for connecting in the axial direction is provided at a position on the outer peripheral surface side of the core piece from the insertion hole, the core pieces in the axial direction can be fixed, and the core pieces can be fixed without being scattered.
　尚、上記実施の形態２においては、第二鉄心片３１２のブリッジ部９に開口部３３を形成する例を示したが、これに限られることはなく、第一鉄心片３１１のブリッジ部９に同様の開口部を形成することも可能である。 In the second embodiment, the example in which the opening 33 is formed in the bridge portion 9 of the second iron core piece 312 is shown, but the present invention is not limited to this, and the bridge portion 9 of the first iron core piece 311 is not limited to this. It is also possible to form similar openings.
実施の形態３．
　本実施の形態３は、上記各実施の形態と異なり、極ブリッジ部１２を備える例について説明する。
図１２はこの発明の実施の形態３における回転子の構成する第一鉄心片の構成を示す部分拡大図である。
図１３はこの発明の実施の形態３における回転子の構成する第二鉄心片の構成を示す部分拡大図である。
図１４は図１２に示した第一鉄心片と図１３に示した第二鉄心片を組み合わせた状態を示す平面図である。
図１５は図１２に示した第一鉄心片と図１３に示した第二鉄心片を組み合わせた状態を示す斜視図である。 Embodiment 3 FIG.
In the third embodiment, an example in which the pole bridge unit 12 is provided will be described, unlike the above embodiments.
FIG. 12 is a partially enlarged view showing the configuration of the first iron core piece formed by the rotor according to Embodiment 3 of the present invention.
FIG. 13 is a partially enlarged view showing the configuration of the second iron core piece formed by the rotor according to Embodiment 3 of the present invention.
14 is a plan view showing a state in which the first iron core piece shown in FIG. 12 and the second iron core piece shown in FIG. 13 are combined.
FIG. 15 is a perspective view showing a state in which the first core piece shown in FIG. 12 and the second core piece shown in FIG. 13 are combined.
　図において、上記各実施の形態と同様の部分は同一符号を付して説明を省略する。図１２および図１３に示すように、極ブリッジ部１２は鉄心片３１の極中心に設けられており、本実施の形態３では挿入孔７の極中心にて挿入孔７を周方向Ｚに２つに分断する。尚、極ブリッジ部１２を複数形成し、挿入孔７を周方向Ｚの２個以上に分断してもよい。図１２に示すように第一鉄心片３１１は、極ブリッジ部１２に分断された挿入孔７を連通する連通孔１３が形成される。磁石６は、分断された挿入孔７にそれぞれ挿入可能な形状にて形成されている。 In the figure, the same parts as those in the above embodiments are denoted by the same reference numerals, and the description thereof is omitted. As shown in FIGS. 12 and 13, the pole bridge portion 12 is provided at the pole center of the iron core piece 31, and in the third embodiment, the insertion hole 7 is arranged in the circumferential direction Z at the pole center of the insertion hole 7. Divide into two. A plurality of pole bridge portions 12 may be formed, and the insertion hole 7 may be divided into two or more in the circumferential direction Z. As shown in FIG. 12, the first iron core piece 311 is formed with a communication hole 13 that communicates with the insertion hole 7 divided by the pole bridge portion 12. The magnets 6 are formed in shapes that can be inserted into the divided insertion holes 7 respectively.
　図１３の第二鉄心片３１２に示したように、ブリッジ部９に開口部３３が形成されると、上記実施の形態２にて示したように、第二鉄心片３１２の挿入孔７の鉄心片３１の外周面３１Ａ側が分離されることとなるが、本実施の形態３においては、極ブリッジ部１２が形成されているため、この部分が分離されることがない。よって、実施の形態２に示したようなカシメ部８１が形成されていなくとも、第二鉄心片３１２がばらけることがない。 When the opening 33 is formed in the bridge portion 9 as shown in the second iron core piece 312 in FIG. 13, as shown in the second embodiment, the iron core of the insertion hole 7 of the second iron core piece 312 is formed. Although the outer peripheral surface 31A side of the piece 31 is separated, in the third embodiment, since the pole bridge portion 12 is formed, this portion is not separated. Therefore, even if the caulking portion 81 as shown in the second embodiment is not formed, the second iron core piece 312 does not come apart.
　次に、上記のように構成された実施の形態３の回転電機１および回転子３の組み立て工法は、上記各実施の形態と同様に行うことができ、第一鉄心片３１１および第二鉄心片３１２の積層枚数および積層箇所は、回転子３として必要となる強度を確保できる程度に設定し、軸方向Ｙに第一鉄心片３１１と第二鉄心片３１２とを積層する。図１４は、第二鉄心片３１２の上に、第一鉄心片３１１を重ねた状態を示す平面図である。図１５は図１４に示したように重ねた状態を軸方向Ｙに切断した部分断面図である。 Next, the assembly method of the rotating electrical machine 1 and the rotor 3 according to the third embodiment configured as described above can be performed in the same manner as in each of the above embodiments, and the first iron core piece 311 and the second iron core piece. The number of laminated layers 312 and the number of laminated portions are set to such an extent that the strength required for the rotor 3 can be ensured, and the first iron core pieces 311 and the second iron core pieces 312 are laminated in the axial direction Y. FIG. 14 is a plan view showing a state in which the first iron core piece 311 is overlaid on the second iron core piece 312. FIG. 15 is a partial cross-sectional view of the stacked state as shown in FIG.
　上記のように構成された実施の形態３の回転子および回転電機によれば、上記各実施の形態と同様の効果を奏するのはもちろんのこと、鉄心片に極ブリッジ部および連通孔を備えることで、磁束の漏れが低減するのはもちろんのこと、ブリッジ部に開口部が形成された場合、極ブリッジ部にて鉄心片が一体に形成されるため、鉄心片同士の軸方向を固定するための連結部を減少できる。 According to the rotor and the rotating electrical machine of the third embodiment configured as described above, the iron core piece is provided with the pole bridge portion and the communication hole as well as the same effects as the above-described embodiments. In order to fix the axial direction of the core pieces, the magnetic flux leakage is reduced and, of course, when the opening is formed in the bridge portion, the core pieces are integrally formed at the pole bridge portion. Can be reduced.
実施の形態４．
　本実施の形態４は、上記各実施の形態と異なり、挿入孔７が、内側弧部７Ｂに突起部１４を備える例について説明する。
図１６はこの発明の実施の形態４における回転子の構成する第一鉄心片の構成を示す部分拡大図である。
図１７はこの発明の実施の形態４における回転子の構成する第二鉄心片の構成を示す部分拡大図である。
図１８は図１６に示した第一鉄心片と図１７に示した第二鉄心片を組み合わせた状態を示す平面図である。
図１９は図１６に示した第一鉄心片と図１７に示した第二鉄心片を組み合わせた状態を示す断面図である。 Embodiment 4 FIG.
In the fourth embodiment, unlike the above-described embodiments, an example in which the insertion hole 7 includes the protrusion 14 on the inner arc portion 7B will be described.
FIG. 16 is a partially enlarged view showing the structure of the first iron core piece which the rotor according to the fourth embodiment of the present invention constitutes.
FIG. 17 is a partially enlarged view showing the configuration of the second iron core piece which the rotor according to the fourth embodiment of the present invention constitutes.
18 is a plan view showing a state in which the first core piece shown in FIG. 16 and the second core piece shown in FIG. 17 are combined.
19 is a sectional view showing a state in which the first core piece shown in FIG. 16 and the second core piece shown in FIG. 17 are combined.
　図において、上記各実施の形態と同様の部分は同一符号を付して説明を省略する。図１６および図１７に示すように、挿入孔７の内側弧部７Ｂは、突起部１４が形成される。突起部１４を設けることで、挿入孔７における磁石６の位置決めと固定とが可能となる。よって、挿入孔７内に磁石６を挿入する際、接着剤等で磁石６を固定しなくても設置が可能となる。 In the figure, the same parts as those in the above embodiments are denoted by the same reference numerals, and the description thereof is omitted. As shown in FIGS. 16 and 17, the inner arc portion 7 </ b> B of the insertion hole 7 is formed with a protrusion 14. By providing the projection 14, the magnet 6 can be positioned and fixed in the insertion hole 7. Therefore, when the magnet 6 is inserted into the insertion hole 7, it can be installed without fixing the magnet 6 with an adhesive or the like.
　次に、上記のように構成された実施の形態４の回転電機１および回転子３の組み立て工法は、上記各実施の形態と同様に行うことができ、第一鉄心片３１１および第二鉄心片３１２の積層枚数および積層箇所は、回転子３として必要となる強度を確保できる程度に設定し、軸方向Ｙに第一鉄心片３１１と第二鉄心片３１２とを積層する。図１８は、第一鉄心片３１１の上に、第二鉄心片３１２を重ねた状態を示す平面図である。図１９は図１８に示したように重ねた状態を軸方向Ｙに切断した部分断面図である。 Next, the assembly method of the rotating electrical machine 1 and the rotor 3 according to the fourth embodiment configured as described above can be performed in the same manner as the above-described embodiments, and the first iron core piece 311 and the second iron core piece. The number of laminated layers 312 and the number of laminated portions are set to such an extent that the strength required for the rotor 3 can be ensured, and the first iron core pieces 311 and the second iron core pieces 312 are laminated in the axial direction Y. FIG. 18 is a plan view showing a state where the second iron core piece 312 is overlaid on the first iron core piece 311. FIG. 19 is a partial cross-sectional view obtained by cutting the stacked state in the axial direction Y as shown in FIG.
　上記のように構成された実施の形態４の回転子および回転電機によれば、上記各実施の形態と同様の効果を奏するのはもちろんのこと、挿入孔の突起部により、磁石の位置精度が向上する。また、磁石を挿入孔への固定する際の工程数の削減やコストの低減を可能となる。 According to the rotor and the rotating electrical machine of the fourth embodiment configured as described above, the magnet position accuracy is improved by the projections of the insertion holes as well as the same effects as the above-described embodiments. improves. In addition, it is possible to reduce the number of processes and costs when fixing the magnet to the insertion hole.
　尚、本発明は、その発明の範囲内において、各実施の形態を自由に組み合わせたり、各実施の形態を適宜、変形、省略することが可能である。 It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

Claims (12)

  1. 環状の鉄心片を軸方向に複数枚積層して形成する鉄心と、前記鉄心に形成された挿入孔と、前記挿入孔に設置された永久磁石とを備えた回転子において、
    前記鉄心は、第一鉄心片および第二鉄心片をそれぞれ複数枚積層して形成され、
    前記第一鉄心片および前記第二鉄心片は、それぞれ、
    前記挿入孔および前記永久磁石が、前記鉄心の中心方向に凸形状に形成され、
    前記挿入孔は、前記鉄心の径方向の外側の外側弧部と、前記鉄心の径方向の内側の内側弧部とを有し、
    前記挿入孔の前記鉄心の外周面側の端部と、前記鉄心の外周面との間には、ブリッジ部が形成され、
    前記ブリッジ部は、前記挿入孔の前記外側弧部に一端が連結された第一端部、前記挿入孔の前記内側弧部に一端が連結された第三端部と、前記第一端部の他端と前記第三端部の他端とを連結する第二端部とを有し、
    前記第一端部、前記第二端部、および前記第三端部は、それぞれ円弧面にて形成され、
    前記第一端部の円弧面の半径をＲ１と、前記第二端部の円弧面の半径をＲ２と、前記第三端部の円弧面の半径をＲ３とした場合、これらの関係は、Ｒ２＞Ｒ１およびＲ３にて形成され、
    前記第一鉄心片および前記第二鉄心片は、
    前記ブリッジ部の前記鉄心の外周面までの距離が、前記第二鉄心片が前記第一鉄心片より短く形成される回転子。     In a rotor including an iron core formed by laminating a plurality of annular core pieces in the axial direction, an insertion hole formed in the iron core, and a permanent magnet installed in the insertion hole,
    The iron core is formed by laminating a plurality of first iron core pieces and second iron core pieces,
    The first iron core piece and the second iron core piece are respectively
    The insertion hole and the permanent magnet are formed in a convex shape in the center direction of the iron core,
    The insertion hole has an outer arc portion on the outer side in the radial direction of the iron core, and an inner arc portion on the inner side in the radial direction of the iron core,
    Between the end of the insertion hole on the outer peripheral surface side of the iron core and the outer peripheral surface of the iron core, a bridge portion is formed,
    The bridge portion includes a first end portion having one end connected to the outer arc portion of the insertion hole, a third end portion having one end connected to the inner arc portion of the insertion hole, and a first end portion. A second end connecting the other end and the other end of the third end;
    The first end, the second end, and the third end are each formed by a circular arc surface,
    When the radius of the arc surface of the first end portion is R1, the radius of the arc surface of the second end portion is R2, and the radius of the arc surface of the third end portion is R3, these relationships are expressed as R2 > R1 and R3,
    The first iron core piece and the second iron core piece are:
    The rotor in which the distance between the bridge portion and the outer peripheral surface of the iron core is such that the second iron core piece is shorter than the first iron core piece.
  2. 前記第二端部は、半径の異なる複数の円弧面にて形成される請求項１に記載の回転子。 The rotor according to claim 1, wherein the second end portion is formed by a plurality of circular arc surfaces having different radii.
  3. 環状の鉄心片を軸方向に複数枚積層して形成する鉄心と、前記鉄心に形成された挿入孔と、前記挿入孔に設置された永久磁石とを備えた回転子において、
    前記鉄心は、第一鉄心片および第二鉄心片をそれぞれ複数枚積層して形成され、
    前記第一鉄心片および前記第二鉄心片は、それぞれ、
    前記挿入孔および前記永久磁石が、前記鉄心の中心方向に凸形状に形成され、
    前記挿入孔は、前記鉄心の径方向の外側の外側弧部と、前記鉄心の径方向の内側の内側弧部とを有し、
    前記挿入孔の前記鉄心の外周面側の端部と、前記鉄心の外周面との間には、ブリッジ部が形成され、
    前記ブリッジ部は、前記挿入孔の前記外側弧部に一端が連結された第一端部、前記挿入孔の前記内側弧部に一端が連結された第三端部と、前記第一端部の他端と前記第三端部の他端とを連結する第二端部とを有し、
    前記第一端部および前記第三端部は、それぞれ円弧面にて形成され、
    前記第二端部は、平面にて形成され、
    前記第一鉄心片および前記第二鉄心片とは、
    前記ブリッジ部の前記鉄心の外周面までの距離が、前記第二鉄心片が前記第一鉄心片より短く形成される回転子。     In a rotor including an iron core formed by laminating a plurality of annular core pieces in the axial direction, an insertion hole formed in the iron core, and a permanent magnet installed in the insertion hole,
    The iron core is formed by laminating a plurality of first iron core pieces and second iron core pieces,
    The first iron core piece and the second iron core piece are respectively
    The insertion hole and the permanent magnet are formed in a convex shape in the center direction of the iron core,
    The insertion hole has an outer arc portion on the outer side in the radial direction of the iron core, and an inner arc portion on the inner side in the radial direction of the iron core,
    Between the end of the insertion hole on the outer peripheral surface side of the iron core and the outer peripheral surface of the iron core, a bridge portion is formed,
    The bridge portion includes a first end portion having one end connected to the outer arc portion of the insertion hole, a third end portion having one end connected to the inner arc portion of the insertion hole, and a first end portion. A second end connecting the other end and the other end of the third end;
    The first end and the third end are each formed by a circular arc surface,
    The second end is formed in a plane,
    The first iron core piece and the second iron core piece are:
    The rotor in which the distance between the bridge portion and the outer peripheral surface of the iron core is such that the second iron core piece is shorter than the first iron core piece.
  4. 前記第一鉄心片または前記第二鉄心片のいずれか一方の前記ブリッジ部は、
    前記挿入孔から前記鉄心の外周面まで連通する開口部を備えた請求項１から請求項３のいずれか１項に記載の回転子。     The bridge portion of either the first iron core piece or the second iron core piece is:
    The rotor according to any one of claims 1 to 3, further comprising an opening that communicates from the insertion hole to an outer peripheral surface of the iron core.
  5. 前記第一鉄心片および前記第二鉄心片は、
    前記挿入孔より前記鉄心の外周面側の箇所に軸方向に連結する連結部を備えた請求項４に記載の回転子。     The first iron core piece and the second iron core piece are:
    The rotor according to claim 4, further comprising a connecting portion that is connected in an axial direction from the insertion hole to a portion on the outer peripheral surface side of the iron core.
  6. 前記連結部は、カシメ部または接着部にて形成されている請求項５に記載の回転子。 The rotor according to claim 5, wherein the connecting part is formed by a crimping part or an adhesive part.
  7. 前記第一鉄心片および前記第二鉄心片は、
    前記挿入孔が、前記挿入孔を周方向の中央部にて分断する極ブリッジ部を備えた請求項１から請求項６のいずれか１項に記載の回転子。     The first iron core piece and the second iron core piece are:
    The rotor according to any one of claims 1 to 6, wherein the insertion hole includes a pole bridge portion that divides the insertion hole at a central portion in a circumferential direction.
  8. 前記極ブリッジ部は、分断された前記挿入孔を連通する連通孔を備えた請求項７に記載の回転子。 The rotor according to claim 7, wherein the pole bridge portion includes a communication hole that communicates the divided insertion hole.
  9. 前記第一鉄心片および前記第二鉄心片は、
    前記挿入孔が、前記挿入孔を周方向に分断する極ブリッジ部を備え、
    前記第一鉄心片または前記第二鉄心片のいずれか一方の前記ブリッジ部が、
    前記挿入孔から前記鉄心の外周面まで連通する開口部を備え、
    前記開口部が形成された前記第一鉄心片または前記第二鉄心片のいずれか一方の前記極ブリッジ部が、分断された前記挿入孔を連通する連通孔を備えた請求項１から請求項３のいずれか１項に記載の回転子。     The first iron core piece and the second iron core piece are:
    The insertion hole includes a pole bridge portion that divides the insertion hole in a circumferential direction,
    The bridge portion of either the first iron core piece or the second iron core piece,
    Comprising an opening communicating from the insertion hole to the outer peripheral surface of the iron core;
    The said pole bridge part of any one of said 1st iron core piece in which said opening part was formed, or said 2nd iron core piece was equipped with the communicating hole which connects the said divided insertion hole. The rotor according to any one of the above.
  10. 前記挿入孔は、前記永久磁石が設置されていないフラックスバリアを有し、
    前記フラックスバリアは、非磁性体または空間にて構成される請求項１から請求項９のいずれか１項に記載の回転子。     The insertion hole has a flux barrier in which the permanent magnet is not installed,
    The rotor according to any one of claims 1 to 9, wherein the flux barrier is configured by a nonmagnetic material or a space.
  11. 前記挿入孔は、前記内側弧部に突起部を備えた請求項１から請求項１０のいずれか１項に記載の回転子。 The rotor according to any one of claims 1 to 10, wherein the insertion hole includes a protrusion on the inner arc portion.
  12. 請求項１から請求項１１のいずれか１項の回転子と、
    前記回転子と同軸上に配置された固定子とを備えた回転電機。     The rotor according to any one of claims 1 to 11,
    A rotating electrical machine comprising the rotor and a stator arranged coaxially.
PCT/JP2017/013730 2016-05-11 2017-03-31 Rotor and rotary electric machine WO2017195498A1 (en)

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CN114503397A (en) * 2019-10-11 2022-05-13 三菱电机株式会社 Rotor, motor, compressor, and air conditioner

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