WO2014192121A1 - Machine électrique rotative de type à fente axiale - Google Patents

Machine électrique rotative de type à fente axiale Download PDF

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Publication number
WO2014192121A1
WO2014192121A1 PCT/JP2013/065070 JP2013065070W WO2014192121A1 WO 2014192121 A1 WO2014192121 A1 WO 2014192121A1 JP 2013065070 W JP2013065070 W JP 2013065070W WO 2014192121 A1 WO2014192121 A1 WO 2014192121A1
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WO
WIPO (PCT)
Prior art keywords
electrical machine
holding member
axial gap
gap type
rotating electrical
Prior art date
Application number
PCT/JP2013/065070
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English (en)
Japanese (ja)
Inventor
芳紹 堤
博洋 床井
榎本　裕治
Original Assignee
株式会社日立製作所
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
Application filed by 株式会社日立製作所 filed Critical 株式会社日立製作所
Priority to PCT/JP2013/065070 priority Critical patent/WO2014192121A1/fr
Priority to JP2015519564A priority patent/JP5957605B2/ja
Publication of WO2014192121A1 publication Critical patent/WO2014192121A1/fr

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Classifications

    • 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
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
    • 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
    • H02K1/2793—Rotors axially facing stators
    • H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2798—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the stator face a rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/08—Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
    • 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
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium

Definitions

  • the present invention relates to an axial gap type rotating electrical machine.
  • An axial gap type rotating electrical machine in which a rotor and a stator are arranged in an axial direction so as to face each other is known.
  • heat generated in the stator coil and the stator core is transmitted to the rotor, and the magnetic force of the permanent magnet is reduced as the temperature of the rotor increases. For this reason, it is desirable to make the temperature rise of the rotor as small as possible.
  • the cooling technique described in Patent Document 1 an intake port and an exhaust port communicating with the outside are provided in the housing, and air (outside air) taken from the outside of the housing is used for cooling the rotor to exchange heat with the rotor.
  • the air warmed by is discharged outside the housing. That is, the cooling technique described in Patent Document 1 is not a technique that considers application to a fully-closed rotating electrical machine that houses a rotor and a stator in a space sealed by a housing.
  • an axial gap type rotating electrical machine includes a pair of rotors fixed to a rotating shaft, a stator disposed between the pair of rotors, a pair of rotors and a stator. And a housing having a cylindrical center bracket disposed so as to cover a radially outer side of the rotating shaft, and a pair of end brackets for closing openings at both ends of the center bracket.
  • the rotor is a sealed space, and the rotor includes a plurality of permanent magnets arranged along the circumferential direction of the rotating shaft, and a holding member that is fixed to the rotating shaft and holds the permanent magnet.
  • a sealed flow path is provided that communicates the cooling air inlet provided on the rotating shaft side of the member and the cooling air outlet provided on the center bracket side of the holding member.
  • the present invention it is possible to effectively cool the rotor accommodated in the housing by circulating the air inside the housing, which is a sealed space.
  • FIG. 3 is a schematic cross-sectional view taken along line III-III in Fig. 1.
  • the fragmentary perspective view which shows the flow path formed in a yoke holding member. It is the elements on larger scale of FIG. 1, and is a figure explaining the flow of the air in a housing.
  • the graph which shows the relationship between the temperature of a permanent magnet, and a residual magnetic flux density.
  • FIG. 7 The cross-sectional schematic diagram which follows the rotating shaft of the axial gap type rotary electric machine which concerns on the 2nd Embodiment of this invention.
  • XX sectional schematic drawing of FIG. The partial perspective view which shows the flow path formed with a yoke holding member and a yoke.
  • the partial perspective view which shows the flow path formed by the 1st member and the 2nd member in the axial gap type rotary electric machine which concerns on a modification (1).
  • the axial gap type rotary electric machine which concerns on a modification (3) WHEREIN: The fragmentary perspective view which shows the flow path of the circular cross section formed in a yoke holding member.
  • the axial cross-section rotary electric machine which concerns on a modification (6) WHEREIN: The partial cross-section schematic diagram which shows the flow path provided in the yoke holding member.
  • FIG. 1 is a schematic cross-sectional view along the rotating shaft 188 of the axial gap type rotating electrical machine according to the first embodiment of the present invention.
  • FIG. 1 schematically shows a cross section taken along a plane including the central axis CL of the rotating shaft 188 and parallel to the central axis CL.
  • An axial gap type rotating electric machine (hereinafter simply referred to as rotating electric machine 100) includes a rotating shaft 188, a pair of rotors 150 fixed to the rotating shaft 188, and a stator 120 disposed between the pair of rotors 150. And a housing 180 that accommodates the pair of rotors 150 and the stator 120.
  • the rotating electrical machine 100 operates as an electric motor or a generator depending on the operation method.
  • the rotating electrical machine 100 of the present embodiment is a 2-rotor 1-stator axial gap rotating electrical machine having a structure in which a stator 120 is sandwiched between a pair of rotors 150 via a predetermined gap.
  • a stator type axial gap type rotating electrical machine more permanent magnet magnetic flux can be used, which is advantageous in terms of higher efficiency and higher output density.
  • the housing 180 has a cylindrical center bracket 182 disposed so as to cover the outer side of the rotating shaft 188 in the radial direction, and a pair of end brackets 181 that close the openings at both ends of the center bracket 182.
  • An interior of the housing 180 that is, a space surrounded by the center bracket 182 and the pair of end brackets 181 is a sealed space that accommodates the pair of rotors 150 and the stator 120.
  • the center bracket 182 and the rotation shaft 188 are arranged so that their center axes coincide.
  • Each end bracket 181 is provided with a through hole through which the rotary shaft 188 passes, and a bearing 186 is provided in the through hole.
  • the rotating shaft 188 is rotatably held by a bearing 186.
  • the pair of rotors 150 are arranged to face each other at a predetermined interval in the axial direction of the rotating shaft 188 (hereinafter also simply referred to as the axial direction).
  • the pair of rotors 150 has the same shape.
  • the rotor 150 includes a plurality of permanent magnets 151, a yoke 152 to which the permanent magnets 151 are fixed, and a yoke holding member 153 to which the yoke 152 is fixed.
  • the yoke 152 and the yoke holding member 153 are preferably formed of a metal material having high thermal conductivity and high electrical conductivity (conductivity).
  • FIG. 2 is a view showing the permanent magnet 151, the yoke 152, and the yoke holding member 153 constituting the rotor 150 of FIG.
  • the yoke 152 has a disk shape, and both side surfaces are flat surfaces, and a circular through hole 152h is provided at the center.
  • the yoke 152 is integrated with the yoke holding member 153 by press-fitting a boss portion 155 of a yoke holding member 153, which will be described later, into the through-hole 152h and being fixed to the yoke holding member 153.
  • a plurality of permanent magnets 151 are fixed to the surface of the yoke 152 on the stator 120 side.
  • the permanent magnet 151 a ferrite magnet, a neodymium magnet, or the like can be used.
  • the permanent magnets 151 have a fan-like plate shape and are arranged at equal intervals along the circumferential direction of the rotating shaft 188 (hereinafter also simply referred to as the circumferential direction).
  • the permanent magnet 151 is magnetized in the axial direction, and one side in the axial direction is an S pole and the other side is an N pole.
  • the permanent magnets 151 are arranged so that the magnetic poles adjacent to each other in the circumferential direction are alternately reversed, that is, N, S, N, S,.
  • the permanent magnet 151 of the rotor 150 on the left side of the drawing and the permanent magnet 151 of the rotor 150 on the right side of the drawing are arranged at the same position and in the same shape in the circumferential direction when viewed from the axial direction. ing.
  • the yoke holding member 153 includes a disk-shaped disk portion 154 and a boss portion 155 that protrudes toward the stator 120 from the center portion of the surface of the disk portion 154 on the stator 120 side. have.
  • a through hole through which the rotation shaft 188 is inserted is provided at the center of the yoke holding member 153.
  • the through hole of the yoke holding member 153 has a small diameter opening 155h and a large diameter opening 154h.
  • the small diameter opening 155h is provided on the stator 120 side, and the large diameter opening 154h is provided on the end bracket 181 side. ing.
  • the small-diameter opening 155h is a portion into which the rotary shaft 188 is press-fitted, and has a diameter substantially the same as the radius R0 of the rotary shaft 188.
  • the large-diameter opening 154h has a radius R1 that is slightly larger than the radius R0 of the rotating shaft 188.
  • the disk portion 154 has a radius R2, and the magnitude relationship between R0, R1, and R2 is R0 ⁇ R1 ⁇ R2.
  • the rotor 150 is integrated with the rotating shaft 188 as shown in FIG. 1 by press-fitting the rotating shaft 188 into the small-diameter opening 155h and fixing the yoke holding member 153 to the rotating shaft 188.
  • a gap G1 is formed between the outer peripheral surface of the rotating shaft 188 and the inner peripheral surface of the large diameter opening 154h.
  • the stator 120 includes a plurality of stator cores 121 arranged at equal intervals along the circumferential direction of the rotation shaft 188, and a stator coil 122 wound around each stator core 121.
  • the stator core 121 is formed by laminating magnetic thin plates such as amorphous foil strips and electromagnetic steel plates made of amorphous metal.
  • the stator core 121 can also be formed of a soft magnetic material such as a dust core.
  • the stator coil 122 is made of copper or aluminum.
  • the stator core 121 and the stator coil 122 are integrally molded with an insulating resin.
  • the mold body 110 has a substantially cylindrical shape, the stator core 121 and the stator coil 122 are held by the mold body 110, and the mold body 110 is fixed to the center bracket 182.
  • FIG. 3 is a schematic cross-sectional view taken along the line III-III in FIG. 1, and FIG. 4 is a partial perspective view showing the flow path 160 formed in the yoke holding member 153.
  • the disk portion 154 of the yoke holding member 153 is provided with a plurality of flow paths 160 so as to extend radially from the central portion toward the radially outer side of the rotation shaft 188.
  • each flow path 160 is a hollow sealed flow path provided so as to penetrate the yoke holding member 153 in the radial direction, and the cross-sectional shape orthogonal to the flow direction is rectangular. Yes.
  • the flow path 160 is provided on the outer peripheral surface of the disk portion 154 from the cooling air inlet (hereinafter simply referred to as the inlet 161) provided on the inner peripheral surface of the large-diameter opening 154h.
  • the cooling air outlet (hereinafter simply referred to as the outlet 162) extends along the radial direction of the rotating shaft 188 (hereinafter also simply referred to as the radial direction), that is, in a direction orthogonal to the rotating shaft 188. That is, the flow path 160 communicates the inlet 161 provided on the rotating shaft 188 side of the yoke holding member 153 and the outlet 162 provided on the center bracket 182 side of the yoke holding member 153.
  • the inlet 161 is provided to face the outer peripheral surface of the rotating shaft 188, and the outlet 162 is provided to face the inner peripheral surface of the center bracket 182.
  • the inlet 161 is shown smaller than the outlet 162, but the cross-sectional area of the flow path 160 is actually the same from the inlet 161 to the outlet 162.
  • FIG. 5 is a partially enlarged view of FIG.
  • white arrows F1 to F5 schematically show the flow of air
  • a black thick line arrow H schematically shows how heat of the rotating electrical machine 100 is released through the housing 180.
  • the housing 180 is filled with air, and when the rotor 150 rotates, air as cooling air circulates in the housing 180 as indicated by white arrows F1 to F5. This will be specifically described below.
  • stator coil 122 When an electric current is passed through the stator coil 122 by an inverter or AC power supply (not shown), an alternating magnetic field is formed in the stator 120.
  • the alternating magnetic field and the static magnetic field generated by the permanent magnet 151 are repeatedly attracted and repelled, whereby the rotor 150 rotates.
  • Euler's force is generated between an inlet 161 provided at a distance R1 from the central axis CL and an outlet 162 provided at a distance R2 from the central axis CL. Air flows from the inlet 161 toward the outlet 162.
  • the size of the Euler head generated by the Euler force is proportional to the difference between the square of the angular velocity and the square of the rotation radius.
  • a predetermined flow rate of air flows in the flow path 160 due to a balance between the Euler force generated by the rotation of the rotor 150 and the frictional resistance in the flow path 160.
  • the open end of the center bracket 182 is closed with an end bracket 181.
  • the air flowing along the inner peripheral surface of the center bracket 182 changes its direction so as to go to the rotation shaft 188 by the end bracket 181 (see arrow F5).
  • the air further changes direction toward the rotor 150 in the vicinity of the rotation shaft 188, flows along the rotation shaft 188, passes through the gap G1 between the rotation shaft 188 and the disk portion 154, and again from the inlet 161. It is introduced into the channel 160 (see arrow F1). In this way, a circulating air flow is formed in the sealed space inside the housing 180 (... ⁇ F 1 ⁇ F 2 ⁇ F 3 ⁇ F 4 ⁇ F 5 ⁇ F 1 ⁇ ).
  • the heat of the air in the housing 180 is radiated to the outside of the housing 180 through the housing 180, so that the temperature of the air in the housing 180 is lowered.
  • the housing 180 is kept at a temperature lower than that of the air in the housing 180 by being blown by cooling air generated by a cooling fan (not shown) or by natural convection.
  • the magnitude relationship of the temperature Th is Tr> To> Ti> Th.
  • the yoke holding member 153 includes a cooling air inlet 161 provided on the rotating shaft 188 side of the yoke holding member 153 and a cooling air outlet 162 provided on the center bracket 182 side of the yoke holding member 153.
  • a communicating hollow channel 160 is provided.
  • Patent Document 1 The technology described in Patent Document 1 (hereinafter referred to as conventional technology) is a technology in which a fan blade is provided in a rotor, the rotor functions as an open centrifugal fan, and the rotor is cooled.
  • the prior art takes air from the outside of the housing, cools the rotor by heat exchange with the rotor, and discharges the warmed air to the outside of the housing. Since the prior art is based on the premise that it is used in an open space, when a rotor having a fan blade of the prior art is used in a fully-closed rotating electrical machine, air is circulated in the sealed space. It is difficult to let
  • the rotation of the rotor 150 generates a pressure difference between the inlet 161 and the outlet 162, thereby generating an air flow in the flow path 160, and the inside of the sealed housing 180. Then, the air is circulated, and the heat of the heated air is radiated to the outside of the housing 180 through the housing 180.
  • a circulation flow of air can be formed in the sealed space, and a predetermined flow rate of air can be continuously introduced into the flow channel 160 having a rectangular cross section.
  • the rotor 150 can be efficiently cooled as a cooling surface.
  • the cooling air inlet 161 is provided to face the outer peripheral surface of the rotating shaft 188. Therefore, an air flow can be formed in the vicinity of the rotating shaft 188, and the rotating shaft 188 is exchanged by heat exchange between the low-temperature air and the rotating shaft 188 before being introduced into the flow path 160 through the inlet 161. Can be cooled. Thereby, the rotor 150 can be cooled more effectively than the case where the inlet 161 is not provided facing the inner peripheral surface of the rotating shaft 188.
  • the outlet 162 is provided to face the inner peripheral surface of the center bracket 182. For this reason, air can be actively sprayed on the center bracket 182 to cool the air by heat exchange between the air and the center bracket 182. Further, the air flowing along the center bracket 182 is sprayed onto the end bracket 181, and the air can be cooled by heat exchange between the air and the end bracket 181.
  • the air sent from the outlet 162 flows toward the end bracket 181, and much of the heat of the air in the sealed space is center bracket. It is discharged to the outside of the housing 180 through 182.
  • a sealed space is formed through both members of the center bracket 182 and the end bracket 181, that is, the entire housing 180. The heat of the air inside can be efficiently released to the outside of the housing 180, and the temperature of the air can be lowered. As a result, the rotor 150 can be effectively cooled by the low-temperature air.
  • FIG. 6 is a graph showing the relationship between the temperature T of the permanent magnet 151 and the residual magnetic flux density Br.
  • the residual magnetic flux density Br of the permanent magnet 151 increases as the temperature T of the permanent magnet 151 decreases.
  • rotor 150 can be cooled by the air flow circulating in the sealed space. That is, according to the present embodiment, the motor efficiency can be improved by reducing the temperature of the permanent magnet 151 so that the residual magnetic flux density Br is increased.
  • an exhaust port for the introduced outside air is provided in a cylindrical portion (corresponding to the center bracket 182 of the present application) of a motor case (corresponding to the housing 180 of the present application), and a plate (end of the present application)
  • the stator is held by a bracket 181).
  • the stator core 121 can be held using the center bracket 182 without considering the position and shape of the exhaust port, compared to the case where the conventional technology is applied to a two-rotor one-stator type rotating electrical machine.
  • a simple configuration can be obtained.
  • productivity can be improved and costs can be reduced.
  • a plurality of flow paths 160 are provided so as to extend radially in the radial direction. For this reason, the rotor 150 can be cooled uniformly.
  • FIG. 7 is a view similar to FIG. 1 and is a schematic cross-sectional view taken along the rotation shaft 188 of the axial gap type rotating electrical machine 200 according to the second embodiment.
  • the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • differences from the first embodiment will be described in detail.
  • the flow path 160 is formed in the yoke holding member 153 (see FIGS. 1 to 5).
  • the flow path 260 is formed by the yoke 152 and the yoke holding member 253.
  • FIG. 8 is a view showing the permanent magnet 151, the yoke 152, and the yoke holding member 253 constituting the rotor 250 of FIG.
  • FIG. 9 is a view of the yoke holding member 253 of FIG. 8 as viewed from the A direction. Note that the cross section of the yoke holding member 253 shown in FIG. 8 is a cross section taken along line VIII-VIII of FIG.
  • the yoke holding member 253 protrudes toward the stator 120 from the center of the disk-shaped disk portion 254 and the surface of the disk portion 254 on the stator 120 side. And a boss portion 255.
  • a through hole 253h through which the rotation shaft 188 is inserted is provided at the center of the yoke holding member 253.
  • the through-hole 253h is a portion into which the rotary shaft 188 is press-fitted, and has a diameter substantially the same as the radius R0 of the rotary shaft 188.
  • the rotor 250 is integrated with the rotary shaft 188 as shown in FIG. 7 by press-fitting the rotary shaft 188 into the through hole 253h and fixing the yoke holding member 253 to the rotary shaft 188.
  • the disk portion 254 is provided with a plurality of grooves 265 so as to extend radially outward from the center portion.
  • the groove 265 is recessed so as to be recessed toward the end bracket 181 from the surface to which the yoke 152 is fixed, and has a bottom surface 265a and a pair of side surfaces 265b rising from the bottom surface 265a.
  • the groove 265 is open on the stator 120 side.
  • An opening 266 penetrating in the axial direction is provided at the end of the bottom surface 265a on the rotating shaft 188 side.
  • FIG. 10 is a schematic cross-sectional view taken along the line XX of FIG. 7, and FIG. 11 is a partial perspective view showing a flow path 260 formed by the yoke holding member 253 and the yoke 152.
  • the plurality of permanent magnets 151 are fixed to the surface of the yoke 152 on the stator 120 side, and are arranged at equal intervals in the circumferential direction.
  • the yoke 152 is integrated with the yoke holding member 253 by press-fitting the boss portion 255 of the yoke holding member 253 into the through hole 152h and being fixed to the yoke holding member 253.
  • the surface of the yoke 152 opposite to the surface to which the permanent magnet 151 is fixed is in contact with the surface of the yoke holding member 253 on the stator 120 side, and the groove 265 on the stator 120 side.
  • the opening is closed by the yoke 152.
  • the flow path cross-section is rectangular and hollow by the four surfaces of the bottom surface 265a constituting the groove 265, the pair of side surfaces 265b, and the surface of the yoke 152 opposite to the surface to which the permanent magnet 151 is fixed.
  • a flow path 260 is formed.
  • the bottom surface 265a of the groove 265 is provided with the opening 266 penetrating in the axial direction.
  • the end face of the opening 266 on the end bracket 181 side is an inlet 261 of the flow path 260, and the inlet 261 faces the end bracket 181.
  • the outlet 262 is provided so as to face the inner peripheral surface of the center bracket 182 as in the first embodiment.
  • the same effects as (1) and (3) to (6) described in the first embodiment are obtained. Furthermore, in the second embodiment, the flow is achieved by the yoke holding member 253 having the groove 265 extending in the radial direction from the inlet 261 to the outlet 262 and the yoke 152 closing the opening of the groove 265 on the stator 120 side. A path 260 was formed. Since the yoke 152 constitutes a part of the flow path 260, the permanent magnet 151 fixed to the yoke 152 can be cooled more effectively, and the motor efficiency can be further improved.
  • the processing is performed as compared with the first embodiment. This makes it easy to reduce the processing cost.
  • the flow path 160 penetrating the yoke holding member 153 that is a single member has been described.
  • a plurality of grooves 165 are formed in the first member 153a so as to extend radially outward from the central portion, and the opening of the groove 165 is closed with the flat surface of the second member 153b, whereby the first member A hollow channel 160 can be formed by the groove 165 of the 153a and the second member 153b.
  • the groove 165 is provided in the first member 153a and the second member 153b is flat.
  • the first member 153a is flat and the second member 153b is A groove may be provided.
  • the grooves 165 and 265 are formed in one of the two members forming the flow paths 160 and 260, and the flat surface of the other member is used.
  • a groove 365 may be provided in both of the two members 363a and 363b, and the channel 360 may be formed by abutting the grooves 365 together.
  • channel 365 can be made small, and manufacturing cost can be reduced.
  • this modification has the effect of reducing manufacturing cost, so that a flow-path area becomes large.
  • the flow path 460 of the cross section of closed curves such as circular shape as shown in FIG.
  • it may be a polygon such as a triangle or a pentagon. It can also be a shape that combines a straight line and a curve, such as a semicircular shape.
  • the flow path is a hollow flow path surrounded by the wall surface of the member holding the permanent magnet 151, that is, a closed flow path (sealed flow path) in which the periphery of the flow path cross section orthogonal to the flow direction is closed.
  • a closed flow path sealed flow path in which the periphery of the flow path cross section orthogonal to the flow direction is closed.
  • a convex portion 553 b extending from the center of the yoke holding member 553 to the outside in the radial direction may be provided along the flow path 160.
  • the yoke holding member 553 has a fixing portion 553a to which the yoke 152 is fixed, and a convex portion 553b protruding in the axial direction from the fixing portion 553a toward the end bracket 181.
  • the channel 160 is provided in the convex portion 553b. That is, the plurality of convex portions 553b are provided so as to extend radially from the central portion of the yoke holding member 553.
  • the cooling effect of the rotor 150 can be further enhanced.
  • the stirring of air is gentle, the flow of the circulating flow that is sent out from the outlet 162 of the flow path 160 and returns to the inlet 161 of the flow path 160 is not hindered.
  • the power for rotating the rotor 150 can be reduced.
  • the flow path 660 may be formed by a circular pipe 668.
  • a plurality of pipes 668 are arranged radially on one surface of a disk-shaped yoke holding member 653, and the pipes 668 are fixed to the yoke holding member 653 by welding, brazing, or the like. According to this modification, it is possible to reduce production man-hours and production costs.
  • the shape of the pipe 668 is not limited to a circular shape, and pipes having various shapes such as a rectangular pipe can be adopted.
  • each of the inlet 761 and the outlet 762 may be disposed to face the end bracket 181.
  • the radial distance R2 from the central axis CL of the rotating shaft 188 to the outlet 762 is made larger than the radial distance R1 from the central axis CL of the rotating shaft 188 to the inlet 761, so that A pressure difference can be generated to generate an air flow in the flow path 760.
  • the outer peripheral portion 753c of the yoke holding member 753 can be used as a cutting allowance for balancing, and the assemblability of the rotating electrical machine can be improved.
  • the holding member that holds the permanent magnet 151 is configured by the yoke 152 to which the permanent magnet 151 is fixed and the yoke holding member 153 to which the yoke 152 is fixed. It is not limited to this.
  • the yoke holding member 153 can be omitted. In this case, a hollow channel through which cooling air flows is formed in the yoke 152.
  • the number of the flow paths 160 and 260 is not limited to the above-described embodiment.
  • the number of permanent magnets 151 provided in each rotor 150 and the number of stator cores 121 can be set as appropriate.
  • the present invention is not limited to the above-described embodiments, and other forms conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention. .
  • rotating electric machine 110 molded body, 120 stator, 121 stator core, 122 stator coil, 150 rotor, 151 permanent magnet, 152 yoke, 152h opening, 153 yoke holding member, 153a first member, 153b second Member, 154 disc part, 154h large diameter opening, 155 boss part, 155h small diameter opening, 160 flow path, 161 inlet, 162 outlet, 165 groove, 180 housing, 181 end bracket, 182 center bracket, 186 bearing, 188 Rotating shaft, 200 axial gap type rotating electrical machine, 250 rotor, 253 yoke holding member, 253h through hole, 254 disc part, 255 boss part, 260 flow path, 261 inlet, 262 outlet, 265 groove, 265a bottom, 26 b Side surface, 266 opening, 360 flow path, 363a, 363b member, 365 groove, 460 flow path, 553 yoke holding member, 553a fixing part, 553b convex part, 653 yok

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  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

L'invention concerne une machine électrique rotative de type à fente axiale munie d'une paire de rotors fixée à un arbre rotatif ; un stator placé entre la paire de rotors ; et un logement pour stocker la paire de rotors et le stator. Le logement comprend un support de central cylindrique disposé de façon à couvrir le côté radial externe de l'arbre rotatif et une paire de supports d'extrémité fermant les ouvertures aux deux extrémités du support central, l'intérieur du logement étant étanche. Les rotors comprennent une pluralité d'aimants permanents disposée le long de la circonférence de l'arbre rotatif et un membre de retenue qui est fixé à l'arbre rotatif et retient les aimants permanents. Le membre de retenue est muni d'un passage étanche qui lie l'une à l'autre une entrée d'air de refroidissement ménagée sur le côté de l'arbre rotatif du membre de retenue et une sortie d'air de refroidissement montée sur le côté du support central du membre de retenue.
PCT/JP2013/065070 2013-05-30 2013-05-30 Machine électrique rotative de type à fente axiale WO2014192121A1 (fr)

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PCT/JP2013/065070 WO2014192121A1 (fr) 2013-05-30 2013-05-30 Machine électrique rotative de type à fente axiale
JP2015519564A JP5957605B2 (ja) 2013-05-30 2013-05-30 アキシャルギャップ型回転電機

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PCT/JP2013/065070 WO2014192121A1 (fr) 2013-05-30 2013-05-30 Machine électrique rotative de type à fente axiale

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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GB2538526A (en) * 2015-05-19 2016-11-23 Yasa Motors Ltd Axial flux machine
JP2018064402A (ja) * 2016-10-14 2018-04-19 マツダ株式会社 アキシャルギャップ型回転電機
CN109586508A (zh) * 2017-09-29 2019-04-05 日本电产株式会社 轴向磁通马达以及电气装置
CN111864966A (zh) * 2020-08-03 2020-10-30 华中科技大学 一种集成式风冷轴向磁通电机
US20220224177A1 (en) * 2021-01-08 2022-07-14 Toyota Jidosha Kabushiki Kaisha Oil-cooling structure for magnets of motor, and motor
DE102022004791A1 (de) 2022-12-19 2024-06-20 Mercedes-Benz Group AG Rotoranordnung für eine elektrische Maschine sowie elektrische Maschine und Verfahren zum Kühlen eines Rotors

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Publication number Priority date Publication date Assignee Title
JP2016135078A (ja) * 2015-01-22 2016-07-25 株式会社デンソー 回転電機
GB2538526A (en) * 2015-05-19 2016-11-23 Yasa Motors Ltd Axial flux machine
WO2016185173A1 (fr) * 2015-05-19 2016-11-24 Yasa Motors Limited Machine à flux axial
US10630157B2 (en) 2015-05-19 2020-04-21 Yasa Limited Axial flux machine
GB2538526B (en) * 2015-05-19 2021-05-26 Yasa Ltd Axial flux machine
JP2018064402A (ja) * 2016-10-14 2018-04-19 マツダ株式会社 アキシャルギャップ型回転電機
CN109586508A (zh) * 2017-09-29 2019-04-05 日本电产株式会社 轴向磁通马达以及电气装置
CN111864966A (zh) * 2020-08-03 2020-10-30 华中科技大学 一种集成式风冷轴向磁通电机
CN111864966B (zh) * 2020-08-03 2021-08-10 华中科技大学 一种集成式风冷轴向磁通电机
US20220224177A1 (en) * 2021-01-08 2022-07-14 Toyota Jidosha Kabushiki Kaisha Oil-cooling structure for magnets of motor, and motor
DE102022004791A1 (de) 2022-12-19 2024-06-20 Mercedes-Benz Group AG Rotoranordnung für eine elektrische Maschine sowie elektrische Maschine und Verfahren zum Kühlen eines Rotors

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