WO2009122596A1 - Machine électrique tournante - Google Patents

Machine électrique tournante Download PDF

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Publication number
WO2009122596A1
WO2009122596A1 PCT/JP2008/061667 JP2008061667W WO2009122596A1 WO 2009122596 A1 WO2009122596 A1 WO 2009122596A1 JP 2008061667 W JP2008061667 W JP 2008061667W WO 2009122596 A1 WO2009122596 A1 WO 2009122596A1
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WO
WIPO (PCT)
Prior art keywords
magnet
magnet holder
claw
blade
magnetic pole
Prior art date
Application number
PCT/JP2008/061667
Other languages
English (en)
Japanese (ja)
Inventor
博和 赤井
正哉 井上
寛治 新川
正夫 守田
敏行 吉澤
盛幸 枦山
龍一 下村
裕之 秋田
慎二 西村
剛 森
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2008095141A external-priority patent/JP5219590B2/ja
Priority claimed from JP2008095137A external-priority patent/JP4974948B2/ja
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Publication of WO2009122596A1 publication Critical patent/WO2009122596A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/02—Details
    • H02K21/04—Windings on magnets for additional excitation ; Windings and magnets for additional excitation
    • H02K21/042—Windings on magnets for additional excitation ; Windings and magnets for additional excitation with permanent magnets and field winding both rotating
    • H02K21/044—Rotor of the claw pole type

Definitions

  • the present invention relates to a rotating electrical machine such as an AC generator for a vehicle, and more particularly to a heat dissipation structure of a permanent magnet in a Landel type rotor.
  • the permanent magnet In the conventional electric machine rotor, the permanent magnet is insert-molded in the pocket and held by the resin fan, so that the heat of the permanent magnet is transferred to the fan through the pocket and radiated from the fan.
  • the thermal conductivity of the resin itself is small and sufficient heat transfer cannot be expected, there is a problem that the permanent magnet is thermally demagnetized.
  • a large centrifugal force acts on the pocket in which the permanent magnet is insert-molded, which may damage the pocket and the fan, and there is a problem that the permanent magnet cannot be stably held. Therefore, in order to stably hold the permanent magnet, it is necessary to increase the rigidity of the pocket and the fan by adding reinforcing fibers to the resin.
  • the moldability is remarkably lowered and the mass productivity is lowered. Challenges arise.
  • the present invention has been made to solve such a problem, and has a permanent magnet held by a magnet holder made of magnetic metal held by a yoke portion, and a heat radiating blade is removed from the magnet holder.
  • the permanent magnet can be held stably by extending between the adjacent claw-shaped magnetic poles, and the heat generated by the permanent magnet can be effectively radiated from the heat dissipating blade. It aims at obtaining the rotary electric machine which can suppress a magnetism.
  • the rotating electrical machine includes a boss portion, a pair of yoke portions extending radially outward from both axial end edges of the boss portion, and an axial direction alternately from each of the pair of yoke portions.
  • a pole core that has a plurality of claw-shaped magnetic pole portions that extend and mesh with each other and are arranged in the circumferential direction.
  • the pole core is fixed to a rotating shaft that is inserted through the axial center of the boss portion, the boss portion, and the pair of joints.
  • a rotor having an iron portion and a field coil housed in a space surrounded by the plurality of claw-shaped magnetic pole portions, and an outer periphery of the rotor is disposed so as to surround a predetermined air gap.
  • the rotating electrical machine includes a magnet holder made of a magnetic material held on the yoke portion so as to face the inner peripheral surface on the tip side of the claw-shaped magnetic pole portion, and an inner periphery on the front end side of the claw-shaped magnetic pole portion.
  • the heat dissipating blade is integrally formed with the magnet holder so as to extend outward in the axial direction from between the claw-shaped magnetic pole portions adjacent in the circumferential direction.
  • the magnet holder since the magnet holder is held by the yoke portion so as to be opposed to the inner peripheral surface of the claw-shaped magnetic pole portion, the magnet holder is located on the inner diameter side of the claw-shaped magnetic pole portion, Centrifugal force acting on the magnet holder is reduced. Moreover, since the magnet holder is made of a magnetic metal and is held by the yoke portion, the holding strength of the magnet holder can be increased. Therefore, the magnet holder is stably held by the yoke portion. Further, since the permanent magnet is held by the magnet holder, the centrifugal force acting on the permanent magnet is received by the magnet holder, and the permanent magnet is stably held by the yoke portion.
  • heat generated by the permanent magnet is transmitted to the heat radiating blade formed integrally with the magnet holder through the magnet holder, and is radiated from the heat radiating blade rotating together with the pole core. Therefore, the heat generated in the permanent magnet is efficiently radiated, the temperature rise of the permanent magnet is suppressed, and thermal demagnetization can be suppressed.
  • FIG. 1 is a cross-sectional view schematically showing an automotive alternator according to Embodiment 1 of the present invention. It is a perspective view which shows the rotor applied to the alternating current generator for vehicles which concerns on Embodiment 1 of this invention. It is a perspective view which shows the magnet holder applied to the vehicle alternator which concerns on Embodiment 1 of this invention. It is a perspective view which shows the permanent magnet mounting state of the magnet holder in the alternating current generator for vehicles concerning Embodiment 1 of this invention. It is a perspective view which shows the permanent magnet mounting state of the magnet holder in the alternating current generator for vehicles concerning Embodiment 2 of this invention.
  • FIG. 8 It is sectional drawing which shows typically the alternating current generator for vehicles which concerns on Embodiment 8 of this invention. It is a disassembled perspective view explaining the structure by the side of the 1st pole core body of the rotor applied to the alternating current generator for vehicles which concerns on Embodiment 8 of this invention. It is a perspective view which shows the rotor applied to the alternating current generator for vehicles which concerns on Embodiment 8 of this invention. It is a perspective view which shows the magnet holder applied to the alternating current generator for vehicles concerning Embodiment 8 of this invention. It is a perspective view which shows the permanent magnet mounting state of the magnet holder in the alternating current generator for vehicles concerning Embodiment 8 of this invention.
  • FIG. FIG. 1 is a sectional view schematically showing an automotive alternator according to Embodiment 1 of the present invention
  • FIG. 2 shows a rotor applied to the automotive alternator according to Embodiment 1 of the present invention
  • FIG. 3 is a perspective view showing a magnet holder applied to the vehicle alternator according to Embodiment 1 of the present invention
  • FIG. 4 is a diagram of the vehicle alternator according to Embodiment 1 of the present invention. It is a perspective view which shows the permanent magnet mounting state of a magnet holder. In FIG. 2, the rotating shaft 16 is omitted.
  • the vehicle alternator 1 supports a case 4 composed of a substantially bowl-shaped aluminum front bracket 2 and a rear bracket 3, and a rotating shaft 16 supported by the case 4 via a bearing 5.
  • the rotor 13 rotatably disposed in the case 4, the pulley 6 fixed to the end of the rotating shaft 16 extending to the front side of the case 4, and the rotor 13 are fixed.
  • a stator 10 that has an air gap 29 and surrounds the outer periphery of the rotor 13 and is fixed to the case 4, and a pair of slip rings that are fixed to the rear side of the rotating shaft 16 and supply current to the rotor 13. 8 and a pair of brushes 9 disposed in the case 4 so as to slide on the slip rings 8.
  • a rectifier that rectifies alternating current generated in the stator 10 into direct current
  • a voltage regulator that adjusts the magnitude of the alternating voltage generated in the stator 10, and the like are disposed in the case 4. .
  • the stator 10 is wound around a cylindrical stator core 11 and the stator core 11, and an alternating current is generated by a change in magnetic flux from a field coil 14 (to be described later) as the rotor 13 rotates. And.
  • the rotor 13 includes a field coil 14 that generates a magnetic flux when an excitation current is passed, a pole core 15 that is provided so as to cover the field coil 14, and a magnetic pole is formed by the magnetic flux, and an axial center position of the pole core 15. And a rotating shaft 16 penetrating the shaft.
  • the axial direction of the rotating shaft 16 is defined as the axial direction.
  • the pole core 15 is divided into first and second pole core bodies 17 and 21 made of a low carbon steel such as S10C by a cold forging method.
  • the first pole core body 17 has a cylindrical outer peripheral surface, a first boss portion 18 formed with a rotation shaft insertion hole 18a penetrating the axial center position, and a radially outer side from one end edge of the first boss portion 18.
  • a thick ring-shaped first yoke portion 19 extended to the first yoke portion 19 and a first claw-shaped magnetic pole portion 20 extended from the outer peripheral portion of the first yoke portion 19 to the other axial end side.
  • the first claw-shaped magnetic pole portion 20 has a substantially trapezoidal outermost surface shape, the circumferential width gradually decreases toward the distal end side, and the radial thickness gradually decreases toward the distal end side.
  • first trough portion 25 is recessed at a portion located between the adjacent first claw-shaped magnetic pole portions 20 of the first yoke portion 19 in, for example, a U-shape that is convexly curved toward the inner diameter side. ing.
  • the second pole core body 21 has a cylindrical outer peripheral surface, a second boss portion 22 formed with a rotation shaft insertion hole 22a penetrating the axial center position, and a radial direction from the other end edge of the second boss portion 22.
  • a thick ring-shaped second yoke portion 23 extending outward, and a second claw-shaped magnetic pole portion 24 extending from the outer periphery of the second yoke portion 23 to one end in the axial direction.
  • the second claw-shaped magnetic pole portion 24 has a substantially trapezoidal outermost surface shape, its circumferential width gradually decreases toward the distal end side, and its radial thickness gradually decreases toward the distal end side.
  • the second valley portion 26 is recessed in a U-shape that is curved convexly toward the inner diameter side, for example, at a portion located between the adjacent first claw-shaped magnetic pole portions 24 of the second yoke portion 23. ing.
  • the first magnet holder 30 is made into a trapezoidal cross section having a predetermined thickness using a magnetic metal such as iron or an iron-based magnetic alloy.
  • channel 31 which makes a groove direction the thickness direction of the 1st magnet holder 30 is recessedly provided so that it may open in the upper surface of the 1st magnet holder 30.
  • the upper and lower surfaces of the first magnet holder 30 and the bottom surface of the first fitting groove 31 are flat surfaces parallel to each other.
  • the first fitting groove 31 is formed in a wedge shape whose groove width gradually decreases toward the opening.
  • the first heat radiation blade 32 is formed integrally with the first magnet holder 30 with a single member.
  • the first heat radiating blade 32 extends in the thickness direction of the first magnet holder 30 from one end face in the thickness direction of the first magnet holder 30 at the center position in the groove width direction of the first fitting groove 31. And is extended downward from the lower surface of the first magnet holder 30.
  • the first heat dissipating blade 32 is formed as a flat plate having an elongated rectangular cross-sectional shape perpendicular to the thickness direction of the first magnet holder 30.
  • the first permanent magnet 33 has an outer shape that can be fitted into the first fitting groove 31 having a trapezoidal cross section in a plane orthogonal to the thickness direction.
  • the flat surface is parallel to the thickness direction, and the distance between the upper surface and the lower surface is an inclined surface that gradually increases from one side to the other in the thickness direction.
  • the first permanent magnet 33 has the thickness direction aligned with the thickness direction of the first magnet holder 30, and the lower end portion of the first permanent magnet 33 is fitted into the first fitting groove 31 from the outside in the thickness direction of the first magnet holder 30. It is attached, and an adhesive is applied as necessary, and is magnetically connected to the first magnet holder 30 and held. At this time, the other side in the thickness direction of the first permanent magnet 33 is positioned on one end surface side in the thickness direction of the first magnet holder 30 from which the first heat dissipating blade 32 extends.
  • the second magnet holder 35 is made in the same shape using the same material as the first magnet holder 30. Similar to the first fitting groove 31, the second fitting groove 36 is formed in the second magnet holder 35. Further, like the first heat radiation blade 32, the second heat radiation blade 37 is formed integrally with the second magnet holder 35 with a single member.
  • the second permanent magnet 38 is made in the same shape using the same material as the first permanent magnet 33.
  • the second permanent magnet 38 has the thickness direction aligned with the thickness direction of the second magnet holder 35, and the lower end portion of the second permanent magnet 38 extends from the outside of the second magnet holder 35 in the thickness direction to the second fitting groove 36. It is fitted, and an adhesive is applied as necessary, and is magnetically connected to the second magnet holder 35 and held. At this time, the other side in the thickness direction of the second permanent magnet 38 is located on one end face side in the thickness direction of the second magnet holder 35 from which the second heat radiation blade 37 extends.
  • the first holding groove 27 opens to each of the opposing portions on the upper side of the inner wall surface of each first trough portion 25 on the base side of each first claw-shaped magnetic pole portion 20 of the first pole core body 17, and the groove The first yoke portion 19 is recessed from one end to the other end side with the direction as the axial direction.
  • the second holding groove 28 opens to each of the opposing portions on the upper side of the inner wall surface of each second valley portion 26 on the root side of each second claw-shaped magnetic pole portion 24 of the second pole core body 21. And it is recessedly provided toward the one end side from the other end of the 2nd yoke part 23 by making a groove direction into an axial direction.
  • the first and second holding grooves 27 and 28 are formed in a groove shape into which both side portions of the first and second magnet holders 30 and 35 are fitted by broaching or end milling.
  • the first magnet holder 30 has the first permanent magnet 33 facing upward and the one side in the thickness direction of the first permanent magnet 33 is a field. It is press-fitted into the first holding groove 27 facing from the outside in the axial direction toward the coil 14 side, coated with an adhesive as necessary, and magnetically mounted on each first trough 25. It is connected and attached to the first pole core body 17.
  • the second magnet holder 35 is opposed from the outside in the axial direction with the second permanent magnet 38 facing upward and one side in the thickness direction of the second permanent magnet 38 facing the field coil 14. It is press-fitted into the second holding groove 28, is coated with an adhesive as necessary, is magnetically connected in a state of being laid on each second valley portion 26, and is attached to the second pole core body 21.
  • first and second pole core bodies 17 and 21 holding the first and second permanent magnets 33 and 38 alternately mesh the first and second claw-shaped magnetic pole portions 20 and 24, and the first The other end surface of the boss portion 18 is abutted against one end surface of the second boss portion 22, and the rotation shaft 16 is fixed to the rotation shaft insertion holes 18 a and 22 a so as to assemble the rotor 13.
  • the field coil 14 wound around a bobbin includes first and second boss portions 18 and 22, first and second yoke portions 19 and 23, and first and second claw shapes.
  • a space surrounded by the magnetic pole portions 20 and 24 is mounted.
  • the first and second boss portions 18 and 22 and the first and second yoke portions 19 and 23 correspond to the boss portion of the pole core 15 and the pair of yoke portions, respectively.
  • the distal end sides of the first and second claw-shaped magnetic pole portions 20 and 24 overlap the second and first yoke portions 23 and 19, respectively.
  • the thickness directions of the first magnet holder 30 and the first permanent magnet 33 coincide with the axial direction, and the upper surface of the first permanent magnet 33 has a predetermined gap with the inner peripheral surface of the distal end side of the second claw-shaped magnetic pole portion 24. Open and face each other.
  • the first heat radiating blade 32 extends outward in the axial direction from between the first claw-shaped magnetic pole portions 20 adjacent in the circumferential direction.
  • the thickness direction of the second magnet holder 35 and the second permanent magnet 38 coincides with the axial direction, and the upper surface of the second permanent magnet 38 has a predetermined gap with the inner peripheral surface of the tip end side of the first claw-shaped magnetic pole part 20. Opposite to each other.
  • the second heat radiating blade 37 extends outward in the axial direction from between the second claw-shaped magnetic pole portions 24 adjacent in the circumferential direction.
  • the first and second permanent magnets 33 and 38 are magnetized and oriented in the direction opposite to the direction of the magnetic field 51 generated when the field coil 14 is energized. And the extension line
  • the first and second permanent magnets 33 and 38 are also magnetized and oriented in opposite directions.
  • a current is supplied from a battery (not shown) to the field coil 14 of the rotor 13 via the brush 9 and the slip ring 8, and a magnetic flux is generated.
  • the first claw-shaped magnetic pole part 20 of the first pole core body 17 is magnetized to the N pole
  • the second claw-shaped magnetic pole part 24 of the second pole core body 21 is magnetized to the S pole.
  • the rotational torque of the engine is transmitted to the rotating shaft 16 via a belt (not shown) and the pulley 6 and the rotor 13 is rotated.
  • Magnetic flux generated by energizing the field coil 14 enters the teeth portion of the stator core 11 from the first claw-shaped magnetic pole portion 20 through the air gap 29.
  • the magnetic flux that has entered the stator core 11 moves in the circumferential direction from the tooth portion of the stator core 11 through the core back portion, and passes through the air gap 29 from the tooth portion facing the adjacent second claw-shaped magnetic pole portion 24.
  • the second claw-shaped magnetic pole portion 24 enters.
  • the magnetic flux that has entered the second claw-shaped magnetic pole portion 24 passes through the second yoke portion 23, the second boss portion 22, the first boss portion 18, and the first yoke portion 19, and the first claw-shaped magnetic pole portion 20.
  • the first and second pole core bodies are designed to be limited, so that magnetic saturation occurs due to the magnetic field generated by the field coil, and the magnetic flux generated in the rotor decreases.
  • the first and second permanent magnets 33 and 38 are magnetized and oriented so as to be opposite to the direction of the magnetic field 51 generated by the field coil 14. Therefore, the magnetic flux generated from the first permanent magnet 33 enters the first magnet holder 30.
  • the 1st trough part 25, ie a large space exists. Therefore, the magnetic flux that has entered the first magnet holder 30 flows in the first magnet holder 30 on both sides in the circumferential direction and enters the first yoke portion 19, and the first boss portion 18, the second boss portion 22, It passes through the second yoke portion 23 and the second claw-shaped magnetic pole portion 24 and returns to the first permanent magnet 33 through the air gap.
  • the magnetic flux generated from the second permanent magnet 38 enters the first claw-shaped magnetic pole portion 20 through the air gap, passes through the first yoke portion 19, the first boss portion 18, and the second boss portion 22, and then passes through the second claw-shaped magnetic pole portion 20. Enter the yoke 23.
  • the magnetic flux that has entered the second yoke portion 23 flows radially outward on both sides of the second valley portion 26 of the second yoke portion 23, and enters the second magnet holder 35 from both ends of the second magnet holder 35. Enter and return to the second permanent magnet 38.
  • the magnetic flux generated by the first and second permanent magnets 33 and 38 is opposite to the magnetic flux generated by the field coil 14, and the magnetic flux density of the magnetic bodies constituting the first and second pole core bodies 17 and 21 is greatly increased. Can be reduced, and magnetic saturation can be eliminated. Thereby, the magnetic flux linked to the stator 10 increases, and the amount of power generation can be increased.
  • first and second permanent magnets 33 and 38 are disposed so as to face the inner peripheral surfaces of the tip end side of the second and first claw-shaped magnetic pole portions 24 and 20, the first and second permanent magnets The magnetic circuits 33 and 38 are closed inside the rotor 13. Therefore, the magnetic flux component (leakage magnetic flux) linked to the stator core 11 in the magnetic flux generated by the first and second permanent magnets 33 and 38 is reduced. Furthermore, since the extension line in the magnetization direction 52 is directed toward the inner peripheral surfaces on the front end side of the opposing second and first claw-shaped magnetic pole portions 24, 20, the leakage magnetic flux is further reduced. As a result, the generation of the induced voltage of the first and second permanent magnets 33 and 38 during no load and no excitation is suppressed.
  • first and second permanent magnets 33 and 38 are disposed so as to face the inner peripheral surfaces of the distal ends of the second and first claw-shaped magnetic pole portions 24 and 20, the first and second permanent magnets are provided.
  • the magnets 33 and 38 are located on the inner diameter side of the second and first claw-shaped magnetic pole portions 24 and 20 and are not directly induction heated by the stator slot harmonics.
  • the first and second permanent magnets 33 and 38 are held by the first and second magnet holders 30 and 35 installed in the first and second valley portions 25 and 26, the field coil 14 is used. The heat generated in is difficult to transfer. Therefore, the temperature rise of the first and second permanent magnets 33 and 38 due to induction heating and heat generation of the field coil 14 is suppressed, and thermal demagnetization can be prevented.
  • first and second permanent magnets 33 and 38 are held by the first and second magnet holders 30 and 35 installed on the first and second valley portions 25 and 26. Therefore, the swing of the first and second claw-shaped magnetic pole portions 20 and 24 caused by centrifugal force and thermal expansion does not affect the holding structure of the first and second permanent magnets 33 and 38. Further, the volume of the first and second magnet holders 30 and 35 can be reduced, the centrifugal force acting on the first and second magnet holders 30 and 35 can be reduced, and the first and second magnet holders 30 and 35 can be reduced. Can be stably held by the first and second yoke portions 19 and 23 with a simple holding structure. Thereby, the 1st and 2nd permanent magnets 33 and 38 of minimum necessary magnet quantity can be stably hold
  • first and second fitting grooves 31 and 36 have the groove direction as the thickness direction of the first and second magnet holders 30 and 35 and are opened on the upper surface. 35 is recessed. Therefore, the first and second permanent magnets 33 and 38 are simply held by the first and second magnet holders 30 and 35 simply by fitting them into the first and second fitting grooves 31 and 36 from the thickness direction. be able to.
  • the first and second holding grooves 27 and 28 open to the respective opposing portions on the upper side of the inner wall surfaces of the first and second valley portions 25 and 26, and the first and second holding grooves 27 and 28 have the groove direction as the axial direction.
  • the second yoke portions 19 and 23 are recessed. Accordingly, the first and second magnet holders 30 and 35 are simply held in the first and second yoke portions 19 and 23 simply by being fitted into the first and second holding grooves 27 and 28 from the axial direction. be able to.
  • first and second heat dissipating blades 32 and 37 are axially outward from between the first claw-shaped magnetic pole portions 20 adjacent in the circumferential direction and between the second claw-shaped magnetic pole portions 24 adjacent in the circumferential direction. Therefore, the first and second heat dissipating blades 32 and 37 rotate together with the pole core 15 to generate an air flow. Therefore, it is possible to omit the conventional cooling fan that is fixed to both end surfaces of the pole core 15 in the axial direction by welding or the like, thereby reducing the number of parts and the welding process, thereby simplifying the assembly process. it can.
  • first and second permanent magnets 33 and 38 are incorporated into the first and second pole core bodies 17 and 21 while being held by the first and second magnet holders 30 and 35, the first and second The assemblability of the permanent magnets 33 and 38 to the first and second pole core bodies 17 and 21 can be improved.
  • first and second heat radiating blades 32 and 37 are integrally formed with the first and second magnet holders 30 and 35 as a single member, the first and second heat radiating blades 32 and 37 are formed. And the thermal resistance between the first and second magnet holders 30 and 35 is reduced. Therefore, the heat generated by the first and second permanent magnets 33 and 38 is quickly transmitted to the first and second heat dissipating blades 32 and 37 via the first and second magnet holders 30 and 35, and The heat is dissipated from the first and second heat dissipating blades 32 and 37 into the air flow.
  • the heat generated in the first and second permanent magnets 33 and 38 is efficiently radiated, the temperature rise of the first and second permanent magnets 33 and 38 is suppressed, and the first and second permanent magnets 33, The thermal demagnetization of 38 is suppressed.
  • FIG. FIG. 5 is a perspective view showing a permanent magnet mounted state of the magnet holder in the automotive alternator according to Embodiment 2 of the present invention.
  • the first heat dissipating blade 32 ⁇ / b> A is located at the center position in the groove width direction of the first fitting groove 31 and from the one end surface in the thickness direction of the first magnet holder 30 in the thickness direction of the first magnet holder 30. It extends upward and extends downward from the lower surface of the first magnet holder 30.
  • the first heat dissipating blade 37A extends from the one end surface in the thickness direction of the second magnet holder 35 in the thickness direction of the second magnet holder 35 and upward at the center position in the groove width direction of the second fitting groove 36. And is extended downward from the lower surface of the second magnet holder 35.
  • the first and second heat dissipating blades 32A, 32A are replaced with the first and second heat dissipating blades 32, 37 instead of the first and second magnet holders 30, 35 formed integrally. Except that the first and second magnet holders 30 and 35 in which 37A is integrally formed are used, the configuration is the same as that of the first embodiment.
  • the first and second heat dissipating blades 32A, 37A are arranged at the center positions in the groove width direction of the first and second fitting grooves 31, 36, and the first and second magnet holders 30, 35 extends from one end face in the thickness direction of the first and second magnet holders 30 and 35 in the thickness direction and upward, and extends downward from the lower surfaces of the first and second magnet holders 30 and 35. ing.
  • the radial width of the first and second heat dissipating blades 32A, 37A is larger than the radial width of the first and second magnet holders 30, 35, the first and second heat dissipating blades 32A, The heat radiation area of 37A increases, the heat radiation characteristics of the first and second permanent magnets 33, 38 are improved, and the temperature rise of the first and second permanent magnets 33, 38 can be suppressed.
  • the first and second radiating blades 32A and 37A are in contact with the other end faces in the thickness direction of the first and second permanent magnets 33 and 38, the axial direction of the first and second permanent magnets 33 and 38 is The movement is restricted, and the first and second permanent magnets 33 and 38 can be stably held.
  • FIG. 6 is a perspective view showing a permanent magnet mounted state of the magnet holder in the automotive alternator according to Embodiment 3 of the present invention.
  • the first heat radiating blade 32 ⁇ / b> B is located at the center position in the groove width direction of the first fitting groove 31 from the one end surface in the thickness direction of the first magnet holder 30 in the thickness direction of the first magnet holder 30. And extends downward from the lower surface of the first magnet holder 30.
  • the first heat radiating blade 32 ⁇ / b> B is formed in a curved shape in which a cross-sectional shape orthogonal to the thickness direction of the first magnet holder 30 is an arc shape.
  • the second heat radiating blade 37 ⁇ / b> B extends in the thickness direction of the second magnet holder 35 from one end face in the thickness direction of the second magnet holder 35 at the center position in the groove width direction of the second fitting groove 36. , And extends downward from the lower surface of the second magnet holder 35.
  • the second heat radiating blade 37 ⁇ / b> B is formed in a curved shape in which a cross-sectional shape orthogonal to the thickness direction of the second magnet holder 35 is an arc shape.
  • the first and second heat dissipating blades 32B instead of the first and second magnet holders 30 and 35 in which the first and second heat dissipating blades 32 and 37 are integrally formed, the first and second heat dissipating blades 32B,
  • the configuration is the same as that of the first embodiment except that the first and second magnet holders 30 and 35 integrally formed with 37B are used.
  • the first and second heat dissipating blades 32B and 37B are formed in a curved surface shape in which the cross-sectional shape perpendicular to the thickness direction of the first and second magnet holders 30 and 35 is an arc shape. Therefore, the amount of air blown as a fan can be increased, and heat generating components such as a rectifier and a voltage regulator can be effectively cooled.
  • FIG. 7 is a perspective view showing a permanent magnet mounted state of a magnet holder in an automotive alternator according to Embodiment 4 of the present invention.
  • the first heat radiating blade 32 ⁇ / b> C extends in the thickness direction of the first magnet holder 30 along one end face of the first fitting groove 31 of the first magnet holder 30 in the groove width direction.
  • the first heat radiating blade 32 ⁇ / b> C is made into a flat plate having a cross-sectional shape orthogonal to the thickness direction of the first magnet holder 30 that is an elongated rectangle.
  • the second heat radiating blade 37 ⁇ / b> C extends in the thickness direction of the second magnet holder 35 along the end surface on one side in the groove width direction of the second fitting groove 36 of the second magnet holder 35.
  • the second heat radiating blade 37 ⁇ / b> C is made into a flat plate having a cross-sectional shape perpendicular to the thickness direction of the second magnet holder 35 and having an elongated rectangle.
  • the first and second heat radiating blades 32C instead of the first and second magnet holders 30 and 35 in which the first and second heat radiating blades 32 and 37 are integrally formed, the first and second heat radiating blades 32C, the configuration is the same as that in the first embodiment except that the first and second magnet holders 30 and 35 in which 37C is integrally formed are used.
  • the first and second heat radiating blades 32C and 37C are arranged on one side in the groove width direction of the first and second fitting grooves 31 and 36 of the first and second magnet holders 30 and 35. Since the first and second magnet holders 30 and 35 are extended in the thickness direction along the end surfaces, the first and second heat radiation blades 32C and 37C can be easily manufactured.
  • FIG. FIG. 8 is a perspective view showing a permanent magnet mounted state of a magnet holder in an automotive alternator according to Embodiment 5 of the present invention.
  • two first heat radiating blades 32 ⁇ / b> C extend in the thickness direction of the first magnet holder 30 along the end surfaces on both sides in the groove width direction of the first fitting groove 31 of the first magnet holder 30.
  • Two second heat radiating blades 37 ⁇ / b> C extend in the thickness direction of the second magnet holder 35 along the end faces on both sides in the groove width direction of the second fitting groove 36 of the second magnet holder 35. .
  • the first and second magnet holders 30 and 35 in which the first and second heat dissipating blades 32 and 37 are integrally formed are replaced with two first and second magnet holders 30 and 35.
  • the configuration is the same as that of the first embodiment except that the first and second magnet holders 30 and 35 in which the blades 32C and 37C for heat radiation are integrally formed are used.
  • the two first and second heat dissipating blades 32C and 37C are provided in the groove width direction of the first and second fitting grooves 31 and 36 of the first and second magnet holders 30 and 35, respectively. Is extended in the thickness direction of the first and second magnet holders 30 and 35 along both end faces of the magnet, so that the heat radiation area is increased and the heat of the first and second permanent magnets 33 and 38 is effectively increased. It is possible to suppress the temperature rise of the first and second permanent magnets 33 and 38.
  • the two heat dissipating blades are formed on the magnet holder, but the number of heat dissipating blades formed on the magnet holder is not limited to two. It may be more than one. Also in the first to third embodiments, the number of heat radiation blades formed on the magnet holder may be two or more.
  • FIG. 9 is an end view showing a rotor applied to an automotive alternator according to Embodiment 6 of the present invention.
  • the first magnet holder 30 is installed on each of the eight first valley portions 25.
  • the first heat dissipating blade 32 is formed integrally with every other first magnet holder 30.
  • the first permanent magnet 33 is fitted and held only in the first fitting groove 31 of the first magnet holder 30 in which the first heat radiation blade 32 is integrally formed.
  • the second magnet holder 35 is installed on each of the eight second trough portions 26, and the second heat dissipating blades 37 are provided every second.
  • the second permanent magnet 38 is fitted and held only in the second fitting groove 36 of the second magnet holder 35 formed integrally with the magnet holder 35 and formed with the second heat radiation blade 37 integrally.
  • Other configurations are the same as those in the first embodiment.
  • the first magnet holder 30 is installed on each of the first valley portions 25, and the first permanent magnets 33 are held by every other first magnet holder 30 in the circumferential direction.
  • the 2nd magnet holder 35 is constructed in each of the 2nd trough part 26, and the 2nd permanent magnet 38 is hold
  • the output is slightly lower than when permanent magnets are arranged in all valleys, the number of parts is reduced. The output can be increased with an inexpensive configuration.
  • the first and second magnet holders 30 and 35 for holding the first and second permanent magnets 33 and 38 are integrally formed with the first and second heat radiation blades 32 and 37, respectively. Thermal demagnetization of the first and second permanent magnets 33 and 38 is suppressed.
  • the magnet holder is installed in each valley portion of each pole core body of the first and second pole core bodies, and the permanent magnet is held by every other magnet holder in the circumferential direction.
  • the magnet holder may be installed in each trough, and the permanent magnet may be selected and held by any magnet holder.
  • the permanent magnet is installed in each trough of the first pole core body.
  • the magnet holder may be held by all of the magnet holders, and the permanent magnets may not be held by the magnet holders erected in each valley portion of the second pole core body.
  • the output is slightly lower than when permanent magnets are provided in all the magnet holders, but the number of parts can be reduced and the output can be increased with an inexpensive configuration.
  • the permanent magnets are arranged in a balanced manner in the circumferential direction, there is no heavy imbalance with respect to centrifugal force.
  • a magnet holder is constructed in each trough part of each pole core body of a 1st and 2nd pole core body, and a permanent magnet is hold
  • the magnet holder may be installed in every other trough in the circumferential direction of each of the pole core bodies of the first and second pole core bodies, and the permanent magnet may be held in each of the magnet holders.
  • FIG. 10 is an end view showing a rotor that is applied to an automotive alternator according to Embodiment 7 of the present invention.
  • the first heat radiating blade 32 is integrally formed with each of the first magnet holders 30 by changing the blade extending position in the groove width direction of the first fitting groove 31 of the first magnet holder 30.
  • the second heat dissipating blade 37 changes the blade extending position in the groove width direction of the second fitting groove 36 of the second magnet holder 35 to change each of the second magnet holders 35.
  • Other configurations are the same as those in the first embodiment.
  • the first and second blades are changed.
  • the arrangement pitch in the circumferential direction of the heat dissipating blades 32 and 37 becomes unequal pitch, and wind noise caused by the rotation of the first and second heat dissipating blades 32 and 37 together with the rotor 13 is reduced.
  • the blade extension positions from the first and second magnet holders 30 and 35 of the first and second heat radiating blades 32 and 37 are changed to make the arrangement pitch of the blades unequal.
  • the method of setting the blade arrangement pitch to be unequal is not limited to this.
  • the first heat dissipating blades 32, 32A, 32B, 32C described in the first to fifth embodiments are not limited thereto.
  • the second heat radiation blades 37, 37A, 37B, and 37C may be arranged in combination.
  • FIG. 11 is a sectional view schematically showing an automotive alternator according to Embodiment 8 of the present invention
  • FIG. 12 shows a rotor applied to the automotive alternator according to Embodiment 8 of the present invention
  • FIG. 13 is a perspective view showing a rotor applied to an automotive alternator according to Embodiment 8 of the present invention
  • FIG. 14 is Embodiment 8 of the present invention
  • FIG. 15 is a perspective view showing a permanent magnet mounting state of a magnet holder in an automotive alternator according to Embodiment 8 of the present invention. is there. In FIG. 13, the rotating shaft 16 and the fan are omitted.
  • the vehicle alternator 1 ⁇ / b> A supports a case 4 composed of a substantially bowl-shaped aluminum front bracket 2 and a rear bracket 3, and a rotating shaft 16 supported by the case 4 via a bearing 5.
  • the rotor 13 rotatably disposed in the case 4, the pulley 6 fixed to the end of the rotating shaft 16 extending to the front side of the case 4, and both ends of the rotor 13 in the axial direction
  • a fan 40 fixed to the surface, a fixed air gap 29 with respect to the rotor 13, a stator 10 surrounding the outer periphery of the rotor 13 and fixed to the case 4, and a rear of the rotating shaft 16
  • a pair of slip rings 8 fixed to the side and supplying current to the rotor 13 and a pair of brushes 9 disposed in the case 4 so as to slide on the slip rings 8 are provided.
  • a rectifier that rectifies alternating current generated in the stator 10 into direct current
  • a voltage regulator that adjusts the magnitude of the alternating voltage generated in the stator 10, and
  • the stator 10 is wound around a cylindrical stator core 11 and the stator core 11, and an alternating current is generated by a change in magnetic flux from a field coil 14 (to be described later) as the rotor 13 rotates. And.
  • the rotor 13 includes a field coil 14 that generates a magnetic flux when an excitation current is passed, a pole core 15 that is provided so as to cover the field coil 14, and a magnetic pole is formed by the magnetic flux, and an axial center position of the pole core 15. And a rotating shaft 16 penetrating the shaft.
  • the axial direction of the rotating shaft 16 is defined as the axial direction.
  • the pole core 15 is divided into first and second pole core bodies 17 and 21 made of a low carbon steel such as S10C by a cold forging method.
  • the first pole core body 17 has a cylindrical outer peripheral surface, a first boss portion 18 formed with a rotation shaft insertion hole 18a penetrating the axial center position, and a radially outer side from one end edge of the first boss portion 18.
  • a thick ring-shaped first yoke portion 19 extended to the first yoke portion 19 and a first claw-shaped magnetic pole portion 20 extended from the outer peripheral portion of the first yoke portion 19 to the other axial end side.
  • the first claw-shaped magnetic pole portion 20 has a substantially trapezoidal outermost surface shape, the circumferential width gradually decreases toward the distal end side, and the radial thickness gradually decreases toward the distal end side.
  • first trough portion 25 is recessed at a portion located between the adjacent first claw-shaped magnetic pole portions 20 of the first yoke portion 19 in, for example, a U-shape that is convexly curved toward the inner diameter side. ing.
  • the second pole core body 21 has a cylindrical outer peripheral surface, a second boss portion 22 formed with a rotation shaft insertion hole 22a penetrating the axial center position, and a radial direction from the other end edge of the second boss portion 22.
  • a thick ring-shaped second yoke portion 23 extending outward, and a second claw-shaped magnetic pole portion 24 extending from the outer periphery of the second yoke portion 23 to one end in the axial direction.
  • the second claw-shaped magnetic pole portion 24 has a substantially trapezoidal outermost surface shape, its circumferential width gradually decreases toward the distal end side, and its radial thickness gradually decreases toward the distal end side.
  • the second valley portion 26 is recessed in a U-shape that is curved convexly toward the inner diameter side, for example, at a portion located between the adjacent first claw-shaped magnetic pole portions 24 of the second yoke portion 23. ing.
  • the first magnet holder 30 is made into a trapezoidal cross section having a predetermined thickness using a magnetic metal such as iron or an iron-based magnetic alloy.
  • channel 31 which makes a groove direction the thickness direction of the 1st magnet holder 30 is recessedly provided so that it may open in the upper surface of the 1st magnet holder 30.
  • the upper and lower surfaces of the first magnet holder 30 and the bottom surface of the first fitting groove 31 are flat surfaces parallel to each other.
  • the first fitting groove 31 is formed in a wedge shape whose groove width gradually decreases toward the opening.
  • the first heat radiation blade 32 is formed integrally with the first magnet holder 30 with a single member.
  • the first heat radiating blade 32 extends in the thickness direction of the first magnet holder 30 from one end face in the thickness direction of the first magnet holder 30 at the center position in the groove width direction of the first fitting groove 31. And is extended downward from the lower surface of the first magnet holder 30.
  • the first heat dissipating blade 32 is formed as a flat plate having an elongated rectangular cross-sectional shape perpendicular to the thickness direction of the first magnet holder 30.
  • the first permanent magnet 33 has an outer shape that can be fitted into the first fitting groove 31 having a trapezoidal cross section in a plane orthogonal to the thickness direction.
  • the flat surface is parallel to the thickness direction, and the distance between the upper surface and the lower surface is an inclined surface that gradually increases from one side to the other in the thickness direction.
  • the first permanent magnet 33 has the thickness direction aligned with the thickness direction of the first magnet holder 30, and the lower end portion of the first permanent magnet 33 is fitted into the first fitting groove 31 from the outside in the thickness direction of the first magnet holder 30. It is attached, and an adhesive is applied as necessary, and is magnetically connected to the first magnet holder 30 and held. At this time, the other side in the thickness direction of the first permanent magnet 33 is positioned on one end surface side in the thickness direction of the first magnet holder 30 from which the first heat dissipating blade 32 extends.
  • the second magnet holder 35 is made in the same shape using the same material as the first magnet holder 30. Similar to the first fitting groove 31, the second fitting groove 36 is formed in the second magnet holder 35. Further, like the first heat radiation blade 32, the second heat radiation blade 37 is formed integrally with the second magnet holder 35 with a single member.
  • the second permanent magnet 38 is made in the same shape using the same material as the first permanent magnet 33.
  • the second permanent magnet 38 has the thickness direction aligned with the thickness direction of the second magnet holder 35, and the lower end portion of the second permanent magnet 38 extends from the outside of the second magnet holder 35 in the thickness direction to the second fitting groove 36. It is fitted, and an adhesive is applied as necessary, and is magnetically connected to the second magnet holder 35 and held. At this time, the other side in the thickness direction of the second permanent magnet 38 is located on one end face side in the thickness direction of the second magnet holder 35 from which the second heat radiation blade 37 extends.
  • the first holding groove 27 opens to each of the opposing portions on the upper side of the inner wall surface of each first trough portion 25 on the base side of each first claw-shaped magnetic pole portion 20 of the first pole core body 17, and the groove The first yoke portion 19 is recessed from one end to the other end side with the direction as the axial direction.
  • the second holding groove 28 opens to each of the opposing portions on the upper side of the inner wall surface of each second valley portion 26 on the root side of each second claw-shaped magnetic pole portion 24 of the second pole core body 21. And it is recessedly provided toward the one end side from the other end of the 2nd yoke part 23 by making a groove direction into an axial direction.
  • the first and second holding grooves 27 and 28 are formed in a groove shape into which both side portions of the first and second magnet holders 30 and 35 are fitted by broaching or end milling.
  • the fan 40 is manufactured by cutting and bending a sheet metal such as iron, copper, aluminum, and stainless steel.
  • the fan base 41 has a flat plate ring shape, and each fan base 41 is cut and raised from the fan base 41 at an equiangular pitch in the circumferential direction.
  • eight fan blades 42 are arranged, and each of the fan bases 41 is formed in an elongated hole shape through which the first and second heat dissipating blades 32 and 37 can be inserted, and arranged at an equiangular pitch in the circumferential direction.
  • eight blade insertion holes 43 are provided. At this time, the angles ⁇ 1 and ⁇ 2 between the blade insertion hole 43 and the fan blades 42 on both sides in the circumferential direction are equal.
  • the fan 40 is attached to the fan base 41 by resistance welding at a plurality of circumferentially welded portions 39 to one end face in the axial direction of the first pole core body 17 and the other end face in the axial direction of the second pole core body 21. It has been.
  • An extension portion of the first heat radiating blade 32 extending from between the first claw-shaped magnetic pole portions 20 passes through the blade insertion hole 43 and extends from the fan base portion 41.
  • an extension portion from between the second claw-shaped magnetic pole portions 24 of the second heat radiating blade 37 passes through the blade insertion hole 43 and extends from the fan base portion 41.
  • the first magnet holder 30 has the first permanent magnet 33 facing upward and the one side in the thickness direction of the first permanent magnet 33 is a field. It is press-fitted into the first holding groove 27 facing from the outside in the axial direction toward the coil 14 side, coated with an adhesive as necessary, and magnetically mounted on each first trough 25. It is connected and attached to the first pole core body 17.
  • the second magnet holder 35 is opposed from the outside in the axial direction with the second permanent magnet 38 facing upward and one side in the thickness direction of the second permanent magnet 38 facing the field coil 14. It is press-fitted into the second holding groove 28, is coated with an adhesive as necessary, is magnetically connected in a state of being laid on each second valley portion 26, and is attached to the second pole core body 21.
  • the first and second pole core bodies 17 and 21 holding the first and second permanent magnets 33 and 38 alternately mesh the first and second claw-shaped magnetic pole portions 20 and 24, and the first The other end surface of the boss portion 18 is abutted against one end surface of the second boss portion 22, and the rotary shaft 16 is fixed to the rotary shaft insertion holes 18a and 22a.
  • the field coil 14 wound around the bobbin (not shown) has the first and second boss portions 18 and 22, the first and second yoke portions 19 and 23, and the first and second claw shapes. A space surrounded by the magnetic pole portions 20 and 24 is mounted.
  • the fan base 41 is applied to one end face in the axial direction of the first pole core body 17 so that the first heat dissipating blade 32 passes through each blade insertion hole 43, and the fan base 41 has a plurality of welded portions 39 in the circumferential direction.
  • resistance welding is performed on the first pole core body 17.
  • the fan base 41 is applied to the other end face in the axial direction of the second pole core body 21 so that the second heat dissipating blade 37 is inserted through each blade insertion hole 43, and the fan base 41 is welded 39 at a plurality of locations in the circumferential direction.
  • resistance welding is performed on the second pole core body 21, and the rotor 13 is assembled.
  • first and second boss portions 18, 22 and the first and second yoke portions 19, 23 correspond to the boss portion of the pole core 15 and a pair of yoke portions, respectively. Further, in the axial direction, the distal end sides of the first and second claw-shaped magnetic pole portions 20 and 24 overlap the second and first yoke portions 23 and 19, respectively.
  • the thickness directions of the first magnet holder 30 and the first permanent magnet 33 coincide with the axial direction, and the upper surface of the first permanent magnet 33 has a predetermined gap with the inner peripheral surface of the distal end side of the second claw-shaped magnetic pole portion 24. Open and face each other.
  • the first heat radiating blade 32 extends through the blade insertion hole 43 from between the first claw-shaped magnetic pole portions 20 adjacent in the circumferential direction and extends outward in the axial direction.
  • the thickness direction of the second magnet holder 35 and the second permanent magnet 38 coincides with the axial direction, and the upper surface of the second permanent magnet 38 has a predetermined gap with the inner peripheral surface of the tip end side of the first claw-shaped magnetic pole part 20. Opposite to each other.
  • the second heat radiating blade 37 extends outward in the axial direction through the blade insertion hole 43 from between the second claw-shaped magnetic pole portions 24 adjacent to each other in the circumferential direction.
  • the first and second permanent magnets 33 and 38 are magnetized and oriented in the direction opposite to the direction of the magnetic field 51 generated when the field coil 14 is energized. And the extension line
  • the first and second permanent magnets 33 and 38 are also magnetized and oriented in opposite directions.
  • the vehicle alternator 1A configured as described above has fans 40 fixed to both end surfaces of the rotor 13 in the axial direction, and first and second heat dissipating blades 32 and 37 are formed in the fan base 41. Except for the point that it is inserted through the provided blade insertion hole 43 and extends from the fan base 41, it is configured in the same manner as the vehicle alternator 1 described in the first embodiment. Therefore, the vehicle alternator 1A operates in the same manner as the vehicle alternator 1, and the description thereof is omitted here.
  • the fan 40 is made of metal, the manufacture is simplified and high rigidity is obtained. Since the first and second heat dissipating blades 32 and 37 are inserted through the blade insertion holes 43, the displacement of the first and second heat dissipating blades 32 and 37 due to the wind pressure when rotating together with the pole core 15 causes the fan base. 41. Thus, the first and second heat radiating blades 32 and 37 are displaced, and the first and second magnet holders 30 and 35 are generated in the fitting portions between the first and second holding grooves 27 and 28. Stress to be reduced, and stable holding of the first and second magnet holders 30 and 35 is ensured.
  • the fan blade 42 protruding from the fan base 41 and the first and second heat radiation blades 32 and 37 extending from the fan base 41 rotate together with the pole core 15 to generate an air flow.
  • heat generating components such as a rectifier and a voltage regulator disposed in the case 4 are effectively cooled.
  • the blade insertion hole 43 is formed in the fan base 41 so that the angles ⁇ 1 and ⁇ 2 between the blade insertion hole 43 and the fan blades 42 on both sides in the circumferential direction are equal.
  • the blade insertion hole 43 is formed in the fan base 41 so that the angles ⁇ 1 and ⁇ 2 between the blade insertion hole 43 and the fan blades 42 on both sides in the circumferential direction are different, the fan blade 42 and the blade insertion hole
  • the arrangement pitch with 43 can be an unequal pitch. In this case, wind noise generated by the rotation of the fan 40 can be reduced.
  • Embodiment 9 FIG.
  • the first and second magnet holders 30 and 35 in which the first and second heat radiation blades 32 and 37 are integrally formed are used.
  • blade insertion holes are formed in the fan base in accordance with the cross-sectional shapes and extending positions of the first and second heat radiation blades 32A, 37A, and the first and second heat radiation blades 32A, 37A extends from the fan base through the blade insertion hole.
  • the first and second heat dissipating blades 32A, 37A are located at the center positions in the groove width direction of the first and second fitting grooves 31, 36, and the first and second magnet holders 30, 35 extends from one end face in the thickness direction of the first and second magnet holders 30 and 35 in the thickness direction and upward, and extends downward from the lower surfaces of the first and second magnet holders 30 and 35. ing.
  • the radial width of the first and second heat dissipating blades 32A, 37A is larger than the radial width of the first and second magnet holders 30, 35, the first and second heat dissipating blades 32A, The heat radiation area of 37A increases, the heat radiation characteristics of the first and second permanent magnets 33, 38 are improved, and the temperature rise of the first and second permanent magnets 33, 38 can be suppressed.
  • the first and second radiating blades 32A and 37A are in contact with the other end faces in the thickness direction of the first and second permanent magnets 33 and 38, the axial direction of the first and second permanent magnets 33 and 38 is The movement is restricted, and the first and second permanent magnets 33 and 38 can be stably held.
  • Embodiment 10 FIG.
  • the first and second magnet holders 30 and 35 in which the first and second heat radiation blades 32 and 37 are integrally formed are used.
  • blade insertion holes are formed in the fan base in accordance with the cross-sectional shapes and extending positions of the first and second heat radiation blades 32B, 37B, and the first and second heat radiation blades 32B, 37B extends through the blade insertion hole and extends from the fan base.
  • the first and second heat radiating blades 32B and 37B are formed in a curved surface shape in which the cross-sectional shape perpendicular to the thickness direction of the first and second magnet holders 30 and 35 is an arc shape. Therefore, the amount of air blown as the fan 40 can be increased, and heat generating components such as a rectifier and a voltage regulator can be effectively cooled.
  • Embodiment 11 FIG.
  • the first and second magnet holders 30 and 35 in which the first and second heat radiation blades 32 and 37 are integrally formed are used.
  • the first and second magnet holders 30 and 35 in which the first and second heat radiation blades 32C and 37C shown in FIG. 7 are integrally formed are used.
  • blade insertion holes are formed in the fan base in accordance with the cross-sectional shapes and extending positions of the first and second heat dissipating blades 32C, 37C, and the first and second heat dissipating blades 32C, 37C extends through the blade insertion hole and extends from the fan base.
  • the two first and second heat dissipating blades 32C, 37C are provided in the groove width direction of the first and second fitting grooves 31, 36 of the first and second magnet holders 30, 35. Since the first and second magnet holders 30 and 35 are extended in the thickness direction along one end face, the first and second heat dissipating blades 32C and 37C can be easily manufactured. Further, the circumferential arrangement pitch between the fan blades and the first and second heat radiation blades 32C and 37C becomes unequal, and the fan blades and the first and second heat radiation blades 32C and 37C rotate together with the rotor 13. Wind noise caused by this is reduced.
  • Embodiment 12 FIG.
  • the first and second magnet holders 30 and 35 in which the first and second heat dissipating blades 32 and 37 are integrally formed are used.
  • 8 uses the first and second magnet holders 30 and 35 in which two first and second heat dissipating blades 32C and 37C are integrally formed.
  • blade insertion holes are formed in the fan base in accordance with the cross-sectional shapes and extending positions of the first and second heat dissipating blades 32C, 37C, and the first and second heat dissipating blades 32C, 37C extends through the blade insertion hole and extends from the fan base.
  • the two first and second heat dissipating blades 32C, 37C are provided in the groove width direction of the first and second fitting grooves 31, 36 of the first and second magnet holders 30, 35. Is extended in the thickness direction of the first and second magnet holders 30 and 35 along both end faces of the magnet, so that the heat radiation area is increased and the heat of the first and second permanent magnets 33 and 38 is effectively increased. It is possible to suppress the temperature rise of the first and second permanent magnets 33 and 38.
  • the two heat dissipating blades are formed on the magnet holder, but the number of heat dissipating blades formed on the magnet holder is not limited to two. It may be more than one. Also in the above eighth to tenth embodiments, the number of heat radiation blades formed on the magnet holder may be two or more.
  • Embodiment 13 FIG.
  • the first magnet holder 30 is installed on each of the first valley portions 25, and the first heat dissipating blades 32 are every other first magnet in the circumferential direction.
  • the first permanent magnet 33 formed on the holder 30 is held only by the first magnet holder 30 on which the first heat radiation blade 32 is formed.
  • the second magnet holders 35 are installed on each of the second valley portions 26, and the second heat radiating blades 37 are formed on every other second magnet holder 35 in the circumferential direction.
  • the second permanent magnet 38 is held only by the second magnet holder 35 on which the second heat radiating blade 37 is formed.
  • blade insertion holes are formed in the fan base in accordance with the cross-sectional shapes and extending positions of the first and second heat dissipating blades 32, 37, and the first and second heat dissipating blades 32, 37 extends from the fan base through the blade insertion hole.
  • Other configurations are the same as those in the eighth embodiment.
  • the first magnet holder 30 is installed on each of the first valley portions 25, and the first permanent magnets 33 are held by every other first magnet holder 30 in the circumferential direction.
  • the 2nd magnet holder 35 is constructed in each of the 2nd trough part 26, and the 2nd permanent magnet 38 is hold
  • the output is slightly lower than when permanent magnets are provided in the valleys, the number of parts can be reduced and the output can be increased with an inexpensive configuration.
  • first and second magnet holders 30 and 35 for holding the first and second permanent magnets 33 and 38 are integrally formed with the first and second heat radiation blades 32 and 37, respectively. Thermal demagnetization of the first and second permanent magnets 33 and 38 is suppressed. Further, the circumferential arrangement pitch between the fan blades and the first and second heat radiation blades 32 and 37 becomes unequal, and the fan blades and the first and second heat radiation blades 32 and 37 rotate together with the rotor 13. Wind noise resulting from the above is reduced.
  • the magnet holder is installed in each valley of each pole core body of the first and second pole core bodies, and the permanent magnet is held by every other magnet holder in the circumferential direction.
  • the magnet holder may be installed in each trough, and the permanent magnet may be selected and held by any magnet holder.
  • the permanent magnet is installed in each trough of the first pole core body.
  • the magnet holder may be held by all of the magnet holders, and the permanent magnets may not be held by the magnet holders erected in each valley portion of the second pole core body.
  • the output is slightly lower than when permanent magnets are provided in all the magnet holders, but the number of parts can be reduced and the output can be increased with an inexpensive configuration.
  • the permanent magnets are arranged in a balanced manner in the circumferential direction, there is no heavy imbalance with respect to centrifugal force.
  • the magnet holder is installed in each valley portion of each pole core body of the first and second pole core bodies, and the permanent magnet is held by every other magnet holder in the circumferential direction.
  • the magnet holder may be installed in every other trough in the circumferential direction of each of the pole core bodies of the first and second pole core bodies, and the permanent magnet may be held in each of the magnet holders.
  • Embodiment 14 FIG.
  • the first heat radiating blade 32 changes the blade extending position in the groove width direction of the first fitting groove 31 of the first magnet holder 30 to change the first.
  • Each of the magnet holders 30 is integrally formed.
  • the second heat dissipating blade 37 changes the blade extending position in the groove width direction of the second fitting groove 36 of the second magnet holder 35 to change each of the second magnet holders 35.
  • blade insertion holes are formed in the fan base in accordance with the cross-sectional shapes and extending positions of the first and second heat radiation blades 32, 37, and the first and second heat radiation blades 32, 37 extends from the fan base through the blade insertion hole.
  • Other configurations are the same as those in the eighth embodiment.
  • the blade extension positions of the first and second heat dissipating blades 32 and 37 from the first magnet holder 30 and the second magnet holder 35 are changed. Wind noise caused by rotation of the fan blades and the first and second heat dissipating blades 32 and 37 together with the rotor 13 due to unequal pitches in the circumferential arrangement pitch between the second heat dissipating blades 32 and 37 and the second heat dissipating blades 32 and 37. Reduced.
  • the magnet holder in which the same heat radiating blade is formed is used.
  • the first heat radiating blades 32, 32A, 32B described in the first to fifth embodiments are used.
  • a magnet holder on which 32C and the second heat radiation blades 37, 37A, 37B, 37C are formed may be used in combination.
  • the vehicle alternator has been described.
  • the present invention is not limited to the vehicle alternator, and is applied to rotating electric machines such as a vehicle motor and a vehicle generator motor. Produces the same effect.
  • the materials of the first and second permanent magnets 33 and 38 are not described, but sintered rare earth magnets such as neodymium / iron / boron magnets and samarium cobalt magnets having a high magnetic flux density are used. Is preferably used.
  • the first and second magnet holders are fitted and held in the first and second holding grooves formed in the first and second yoke portions.
  • the holding structure of the first and second magnet holders is not limited to this.
  • the first and second magnet holders may be held by being joined to the first and second yoke portions by welding or the like. Good.
  • the first and second valley portions are formed using the first and second pole core bodies formed in the first and second yoke portions, but the first and second valley portions are used. However, you may use the 1st and 2nd pole core body which is not formed in the 1st and 2nd yoke part.
  • the first and second magnet holders may be directly held on the outer peripheral surfaces of the first and second yoke portions so as to be opposed to the inner peripheral surfaces of the distal ends of the second and first claw-shaped magnetic pole portions. .
  • the first and second permanent magnets are formed in a trapezoidal cross section having a predetermined thickness.
  • the first and second permanent magnets are formed on the first and second magnet holders.
  • the cross-sectional shape is not particularly limited as long as it is fitted and held.
  • the first and second magnet holders are formed in a trapezoidal cross section having a predetermined thickness, but the first and second magnet holders are fitted and held in the first and second holding grooves. If it is, the cross-sectional shape is not particularly limited.
  • the first and second heat dissipating blades and the first and second magnet holders are integrally formed with a single member.
  • the first and second heat radiating blades and the first and second magnet holders may be joined together by welding or the like to be integrally formed.
  • the fan blade uses a fan protruding from the fan base. However, since the heat dissipating blade rotates together with the pole core to generate an air flow, When the heat generation amount of the heat-generating component is small, the fan blade protruding from the fan base may be omitted or the number of fan blades may be reduced.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Synchronous Machinery (AREA)

Abstract

L'invention porte sur une machine électrique tournante dans laquelle des aimants permanents peuvent être maintenus de façon stable, et la désaimantation des aimants permanents due à de la chaleur est supprimée par dissipation efficace de la chaleur des aimants permanents au moyen d'ailettes de dissipation de chaleur. Dans la machine électrique tournante, des premier et second supports d'aimant sont maintenus sur des première et seconde parties de culasse de façon à faire face aux surfaces périphériques internes sur les côtés d'extrémité de pointe de seconde et première parties de pôle magnétique du type griffe, respectivement, et les premier et second aimants sont maintenus sur les premier et second supports d'aimant de façon à faire face aux surfaces périphériques internes sur les côtés d'extrémité de pointe des seconde et première parties de pôle magnétique du type griffe, respectivement. Les première et seconde ailettes de dissipation de chaleur sont formées d'un seul tenant avec les premier et second supports d'aimant de façon à s'étendre axialement vers l'extérieur à partir de la partie comprise entre les premier et second pôles magnétiques du type griffe adjacents l'un à l'autre dans la direction circonférentielle.
PCT/JP2008/061667 2008-04-01 2008-06-26 Machine électrique tournante WO2009122596A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2008095141A JP5219590B2 (ja) 2008-04-01 2008-04-01 回転電機
JP2008-095137 2008-04-01
JP2008095137A JP4974948B2 (ja) 2008-04-01 2008-04-01 回転電機
JP2008-095141 2008-04-01

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Publication Number Publication Date
WO2009122596A1 true WO2009122596A1 (fr) 2009-10-08

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PCT/JP2008/061667 WO2009122596A1 (fr) 2008-04-01 2008-06-26 Machine électrique tournante

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WO (1) WO2009122596A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20110377A1 (it) * 2011-03-10 2012-09-11 Wilic Sarl Macchina elettrica rotante per aerogeneratore

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10136623A (ja) * 1996-10-17 1998-05-22 Robert Bosch Gmbh クローポールジェネレータ
JPH11275831A (ja) * 1998-01-26 1999-10-08 Robert Bosch Gmbh 同期機
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JP2003244875A (ja) * 2002-01-24 2003-08-29 Visteon Global Technologies Inc オールタネータ用回転子アセンブリ

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ITMI20110377A1 (it) * 2011-03-10 2012-09-11 Wilic Sarl Macchina elettrica rotante per aerogeneratore
EP2498386A1 (fr) * 2011-03-10 2012-09-12 Wilic S.Ar.L Machine électrique rotative d'éolienne
US8937398B2 (en) 2011-03-10 2015-01-20 Wilic S.Ar.L. Wind turbine rotary electric machine

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