WO2014136503A1 - Machine électrique rotative - Google Patents

Machine électrique rotative Download PDF

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Publication number
WO2014136503A1
WO2014136503A1 PCT/JP2014/052017 JP2014052017W WO2014136503A1 WO 2014136503 A1 WO2014136503 A1 WO 2014136503A1 JP 2014052017 W JP2014052017 W JP 2014052017W WO 2014136503 A1 WO2014136503 A1 WO 2014136503A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
motor case
heat conducting
conducting member
motor
Prior art date
Application number
PCT/JP2014/052017
Other languages
English (en)
Japanese (ja)
Inventor
壮一 舞原
山際　正憲
正 矢部
Original Assignee
日産自動車株式会社
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
Application filed by 日産自動車株式会社 filed Critical 日産自動車株式会社
Priority to JP2015504200A priority Critical patent/JPWO2014136503A1/ja
Publication of WO2014136503A1 publication Critical patent/WO2014136503A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • H02K9/223—Heat bridges
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators

Definitions

  • the present invention relates to a rotating electrical machine.
  • a rotating electrical machine in which a stator (stator) is housed in a motor case (housing) is known.
  • a rotating electrical machine described in Patent Document 1 includes an annular stator and a bottomed cylindrical motor case, and an axial end of the stator is fastened to a wall portion serving as a bottom portion of the motor case via a plurality of bolts.
  • the stator is cantilevered on the motor case.
  • the present invention focuses on the above-described problem, and an object thereof is to propose a rotating electrical machine that can improve the heat dissipation performance of heat generated in a stator.
  • the rotating electrical machine of the present invention includes a heat conduction member that is in thermal contact with the stator and the motor case in the radial gap between the outer peripheral surface of the stator in the radial direction and the inner peripheral surface of the motor case. Inserted.
  • ⁇ Heat dissipation performance can be improved by transferring the heat generated in the stator to the motor case via the heat conducting member.
  • FIG. 3 is a schematic view of a cross section of the motor 1 according to the first embodiment cut along a plane passing through its axis O. It is a perspective view of the motor case 4 (only a part is shown) which accommodated the stator 2 and the heat conductive member 5 of Example 1.
  • FIG. It is the front view which looked at a part of stator 2 and heat conduction member 5 accommodated in motor case 4 (cylindrical part 4a) of Example 1 from the axial direction. It is the front view which looked at a part of stator 2 and heat conduction member 5 accommodated in motor case 4 (cylindrical part 4a) of Example 2 from the axial direction.
  • the rotating electrical machine (hereinafter referred to as motor 1) of the present embodiment is used in an in-wheel motor (wheel drive unit) of an electric vehicle, and is provided on each wheel, so that the vehicle can run by driving the wheels individually. To do.
  • the motor 1 is accommodated in a wheel support member (not shown) that rotatably supports the wheel.
  • the motor 1 is a three-phase AC motor, functions as an electric motor (motor) when the power source (battery) is discharged, and generates power by applying the three-phase AC supplied from the inverter to the stator coil. When the battery is charged, it functions as a generator, and supplies three-phase alternating current from the stator coil to the inverter.
  • the motor 1 may be used in a drive unit or the like of a hybrid vehicle or the like, and the application is not particularly limited.
  • the motor 1 is not limited to three-phase alternating current.
  • the motor 1 includes an annular stator 2, an unillustrated rotor (rotor) accommodated on the inner peripheral side of the stator 2, a motor case 4 that accommodates the stator 2, and one axial end of the stator 2 as a motor case. 4 and an inner frame 3 as a support member that is fixedly supported with respect to 4.
  • FIG. 1 is a schematic view of a cross section of the motor 1 taken along a plane passing through its axis O.
  • the x axis is provided in the direction in which the axis O extends, and the side on which the inner frame 3 is disposed with respect to the stator 2 (or the side on which the bottom 4b is provided in the motor case 4) is defined as the positive direction.
  • FIG. 2 is a perspective view of the motor case 4 (cylindrical portion 4a) containing the stator 2 and the heat conducting member 5 as seen from the x-axis negative direction side. Only a part of the motor case 4 (cylindrical portion 4a) is shown.
  • FIG. 3 is a front view of a part of the stator 2 and the like in the above state as viewed from the x-axis direction.
  • the stator 2 has a stator core 2a and a coil 2b wound around the stator core 2a.
  • the stator core 2a has an annular shape (hollow cylindrical shape), and has a plurality (18 in this embodiment) of teeth arranged in an annular shape in the circumferential direction on the inner peripheral surface thereof. Each tooth is provided so as to extend in the radial direction, and a slot 21 is formed between adjacent teeth. The winding of the coil 2 b is wound around the teeth so as to fit into the slot 21.
  • the stator core 2a is configured by, for example, arranging a plurality of core pieces (divided stator cores) in an annular shape.
  • the core piece is configured, for example, by laminating magnetic steel sheets made of magnetic material in the axial direction.
  • a plurality of (for example, three) bolt fastening portions 22 are formed at substantially equal intervals (shifted by 120 °) in the circumferential direction at the end portion in the positive x-axis direction of the stator core 2a.
  • a bolt hole into which the fastening bolt is inserted is formed in the bolt fastening portion 22 in the axial direction.
  • the rotor is arranged substantially coaxially with the stator 2 on the inner periphery of the stator 2.
  • the rotor is arranged with respect to the stator 2 via a radial gap (radial gap), and a magnetic path is formed through this gap.
  • the rotor includes, for example, a rotor core configured by stacking a plurality of electromagnetic steel plates, and a plurality of permanent magnets arranged (embedded) in the rotor core.
  • An output shaft (not shown) of the motor 1 is fixedly installed on the rotor.
  • the output shaft is rotatably supported with respect to the wheel support member by bearings disposed on both sides in the axial direction of the rotor.
  • One end side (the x-axis positive direction side near the wheel) of the output shaft is rotatably supported by a bearing provided on the radially inner side of the motor case 4 and is coupled to the wheel (wheel hub).
  • the stator 2 When the stator 2 is energized, the rotor is rotationally driven by the electromagnetic force generated by the stator 2.
  • the rotational driving force output from the motor 1 is transmitted as a rotational force to the wheel via the output shaft, and the electric vehicle can run by rotating the wheel integrally with the output shaft.
  • the wheels are rotated by the inertial force of the vehicle body, and the motor 1 is driven via the output shaft by the rotational force from the wheels.
  • the motor 1 operates as a generator, and the generated electric power is stored in the battery via the inverter.
  • the motor case 4 is an outer frame (outer frame) of the motor 1 and has a function of protecting the stator 2 and the like from the outside of the motor, and is fixedly installed on the wheel support member.
  • the motor case 4 has a bottomed cylindrical shape, and includes a cylindrical portion 4a extending in the axial direction and a disc-shaped bottom portion 4b extending in the radial direction.
  • a bolt fastening portion 42 is provided on the bottom portion 4b in a substantially annular shape surrounding the bearing portion 41 (bearing).
  • the bolt fastening portion 42 is provided integrally with the bearing portion 41 on the outer peripheral side of the bearing portion 41 (bearing).
  • the bolt fastening portion 42 is formed with a plurality (for example, 8) of bolt holes (female screw portions) into which fastening bolts are inserted side by side at substantially equal intervals in the circumferential direction.
  • the bolt fastening portion 42 is thicker in the x-axis direction than the other portions of the bottom portion 4b and has a relatively high rigidity so that the strength around the bolt hole can be sufficiently secured.
  • the stator 2 is disposed substantially coaxially with the motor case 4 (cylindrical portion 4a) on the inner peripheral side of the motor case 4 (cylindrical portion 4a).
  • the stator 2 is disposed with respect to the motor case 4 (cylindrical portion 4a) via a radial gap (radial gap) CL1.
  • the inner frame 3 is an inner frame of the motor 1 and is a support member for holding the stator 2 with respect to the motor case 4.
  • the inner frame 3 is made of, for example, an aluminum-based or iron-based metal material.
  • the inner frame 3 has a donut-shaped disk shape, and includes a cylindrical portion 3a extending in the axial direction, and a donut-shaped circular plate extending radially inward from the inner periphery of one end side (x-axis positive direction side) of the cylindrical portion 3a in the axial direction. Plate portion 3b.
  • a plurality of (for example, three) bolt fastening portions 30 are formed at substantially equal intervals (120 ° shifted) from each other in the circumferential direction.
  • a bolt hole into which the fastening bolt is inserted is formed in the bolt fastening portion 30 in the axial direction.
  • the inner bolt 3 is fixed to the stator 2 by fastening the bolt fastening portion 30 of the cylindrical portion 3 a and the bolt fastening portion 22 of the stator 2.
  • the bolt fastening portion 30 of the cylindrical portion 3 a is a coupling portion (first coupling portion) with the stator 2 of the inner frame 3, and is provided on the radially outer side of the inner frame 3.
  • the outer peripheral surface 34 on the radially outer side of the cylindrical portion 3a is provided so as to be accommodated in the outer peripheral surface 23 on the outer side in the radial direction of the stator core 2a when viewed from the x-axis direction.
  • the inner frame 3 (cylindrical portion 3a) is arranged in a state of being coupled to the stator 2 via a radial gap (radial gap) CL2 with respect to the motor case 4 (cylindrical portion 4a).
  • a through hole 31 is provided in the approximate center of the plate portion 3b, and a bolt fastening portion 32 is provided in a substantially annular shape surrounding the through hole 31.
  • the bearing portion 41 of the motor case 4 is fitted and installed in the through hole 31.
  • a plurality (for example, 8) of holes, into which fastening bolts are inserted, are formed in the axial direction so as to be arranged at substantially equal intervals in the circumferential direction.
  • the inner bolt 3 is fixed to the motor case 4 by fastening the bolt fastening portion 32 of the plate portion 3 b and the bolt fastening portion 42 of the motor case 4.
  • the bolt fastening portion 32 of the plate portion 3 b is a coupling portion (second coupling portion) between the inner frame 3 and the motor case 4, and is provided inside the inner frame 3 in the radial direction. In a state where the inner frame 3 is coupled to the stator 2, the bolt fastening portion 32 is located radially inward of the stator core 2 a and faces the rotor in the axial direction.
  • the inner frame 3 is coupled to the stator 2 at the cylindrical portion 3a (first coupling portion), and is coupled to the motor case 4 on the inner peripheral side (second coupling portion) of the plate portion 3b. That is, the inner frame 3 supports the stator 2 on the motor case 4 on the radially inner side of the stator 2.
  • the stator 2 is coupled to the motor case 4 via the inner frame 3 so that the axis thereof substantially coincides with the axis O of the motor case 4. Thereby, one end (x-axis positive direction end) of the stator 2 in the axial direction is cantilevered with respect to the motor case 4.
  • a connecting portion 33 is provided on the plate portion 3b of the inner frame 3 on the radially outer side of the bolt fastening portion 32 and on the radially inner side of the cylindrical portion 3a (bolt fastening portion 30).
  • the connecting portion 33 is a portion that connects the cylindrical portion 3a and the bolt fastening portion 32, and surrounds the bolt fastening portion 32 and has a substantially annular shape with a smaller dimension in the x-axis direction than the bolt fastening portion 32 (that is, a plate thickness). It is a thin part provided.
  • the plate portion 3b is provided at the positive end in the x-axis direction of the cylindrical portion 3a.
  • the connecting portion 33 is connected to the stator coil 2b with an axial gap ( It is arranged via an axial gap) CL3 corresponding to the dimension in the x-axis direction of the cylindrical portion 3a. Further, in a state in which the inner frame 3 (bolt fastening portion 32) is coupled to the motor case 4, the connection portion 33 is disposed with respect to the motor case 4 (bottom portion 4b) via an axial gap (axial gap) CL4. .
  • the rigidity of the inner frame 3 is set lower than that of the motor case 4. Specifically, the rigidity in the radial direction of the plate portion 3b (connecting portion 33) of the inner frame 3 is lower than the rigidity in the radial direction of the bottom portion 4b of the motor case 4, and the same plate portion 3b (connecting portion 33). Is provided lower than the rigidity in the circumferential direction. In addition, in the connection part 33 (between the bolt fastening parts 30 and 32) of the plate part 3b, it is good also as reducing the rigidity of the radial direction by providing several thinning.
  • the heat conducting member 5 is a heat transfer member that is in thermal contact with the stator 2 and the motor case 4 and moves heat from the stator 2 to the motor case 4.
  • the heat conducting member 5 is also a spring as an elastic member.
  • a metal material constituting the heat conducting member 5 a material having relatively high heat conductivity, for example, a copper material can be employed. In addition, it is good also as using the stainless steel strip for springs.
  • the heat conducting member 5 is provided at a substantially symmetrical position with respect to the axis O on the outer peripheral side of the stator 2.
  • the heat conducting member 5 is formed in an annular shape using a strip-shaped metal thin plate.
  • the thin plate is provided so as to spread substantially parallel to the x-axis direction, and is installed so as to cover the outer peripheral surface 23 over the entire circumference of the stator 2.
  • the dimension (plate width) of the heat conducting member 5 in the x-axis direction is substantially equal to the dimension of the stator core 2a in the x-axis direction.
  • the heat conducting member 5 is formed so as to be alternately displaced radially outward and inward as it advances along the circumferential direction thereof, and is formed so as to be undulated. And a plurality of case press contact portions 52 located in each.
  • the heat conducting member 5 When viewed from the x-axis direction, the heat conducting member 5 has a substantially sinusoidal shape, and both the pressure contact portions 51 and 52 have a curved shape.
  • the curvatures of the two pressure contact parts 51 and 52 viewed from the x-axis direction are larger than the curvatures of the surfaces 23 and 43 constituting the gap CL1.
  • the adjacent pressure contact parts 51 and 52 are connected by a connection part 50.
  • the radial dimension of the heat conducting member 5 in the unloaded state is slightly larger than the radial dimension of the gap CL1.
  • the heat conducting member 5 is slightly compressed in the radial direction in a state of being inserted into the gap CL1, the stator pressure contact portion 51 is pressed against the outer peripheral surface 23 of the stator 2, and the case pressure contact portion 52 is the inner periphery of the motor case 4. Press contact with the surface 43.
  • the heat conducting member 5 comes into contact with both the outer peripheral surface 23 of the stator 2 and the inner peripheral surface 43 of the motor case 4 by the stator press contact portions 51 and the case press contact portions 52 that alternately appear in the circumferential direction.
  • connection part 50 and the two pressure contact parts 51 and 52 are formed so as to extend in the x-axis direction.
  • the x-axis positive direction end of the heat conducting member 5 reaches the x-axis positive direction end of the stator core 2a
  • the x-axis negative direction end of the heat conducting member 5 reaches the x-axis negative direction end of the stator core 2a. That is, the stator pressure contact portion 51 of the heat conducting member 5 is in pressure contact with the outer peripheral surface 23 over the entire range of the stator core 2a in the x-axis direction. Further, the case pressure contact portion 52 of the heat conducting member 5 is in pressure contact with the inner peripheral surface 43 of the motor case 4 over the entire range in the x-axis direction.
  • the stator pressure contact portion 51 is not fixed to the outer peripheral surface 23 of the stator 2 by welding or the like.
  • the case pressure contact portion 52 is not fixed to the inner peripheral surface 43 of the motor case 4 by welding or the like. That is, the heat conducting member 5 is not fixed to both the stator 2 and the motor case 4 and is provided to be slidable in the circumferential direction with respect to both.
  • the motor 1 vibrates when driving force is generated as an electric motor and when power is generated as a generator.
  • the stator core 2 a is an oscillation source of the vibration of the motor 1.
  • noise to the outside of the motor case 4 is generated.
  • the stator core 2a vibrates radially (radially) with a relatively large amplitude at the outer peripheral portion. Vibration and noise are generated by such an electromagnetic excitation force in the radial direction of the stator 2.
  • the electromagnetic excitation force of the stator 2 is such that the magnetic path of the field magnetic flux generated from the magnetic pole of the rotor crosses the opening of the slot 21 provided in the stator 2 when the magnetic pole of the rotor crosses the rotor and the stator 2 relative to each other. This occurs when the magnetic flux distribution in the gap changes.
  • the rotational order, spatial order, and amplitude of the electromagnetic excitation force in the radial direction depend on the number of magnetic poles of the motor 1 (the number of effective magnetic pole opening angles of the rotor and the number of slots 21 provided in the stator 2).
  • As a vibration mode by the electromagnetic excitation force in the radial direction there is an annular zero-order mode in which the stator 2 vibrates in the same direction in the radial direction of the motor 1.
  • the electromagnetic excitation force that depends on the number of magnetic poles of the motor 1 excites a resonance mode caused by the structure of the motor case 4, it becomes a high-tone noise that is annoying.
  • the vibration of the stator 2 is transmitted to the motor case 4 through a relatively short vibration transmission path. Further, when the stator 2 is supported by the inner peripheral surface 43 of the motor case 4, the stator 2 and the motor case 4 come into surface contact, and the vibration in the radial direction of the stator 2 is transmitted to the motor case 4 through the contact surface. There is a fear. In other words, the electromagnetic excitation force of the stator 2 is directly transmitted to the motor case 4 and noise to the outside of the motor case 4 is generated.
  • a floating structure is used in which the stator 2 is supported in a floating state with respect to the motor case 4. Specifically, the stator 2 is separated from the inner periphery of the motor case 4 in the radial direction, and the stator 2 is fixed to a portion of the motor case 4 that is separated from the stator 2 in the axial direction. Therefore, the noise from the motor 1 that the driver feels uncomfortable can be reduced, and a comfortable vehicle interior space can be provided.
  • the inner frame 3 as a stator supporting member (support member) is not used as in the present embodiment, but the stator 2 is fixed to the bottom 4b of the motor case 4 as it is. It is good as well.
  • stator 2 is supported at both ends by the motor case 4 (the stator 2 is supported at both axial ends of the motor case 4).
  • the radial vibration of the stator 2 is transmitted to the motor case 4 via the support portions on both sides in the axial direction of the stator 2. Therefore, vibration transmitted from the stator 2 to the motor case 4 cannot be sufficiently reduced, and the sound vibration performance of the motor 1 may be deteriorated.
  • the stator 2 is cantilevered with respect to the motor case 4. Therefore, the vibration transmission path from the stator 2 to the motor case 4 is limited to only one side in the axial direction, thereby reducing the vibration transmitted from the stator 2 to the motor case 4, thereby improving the sound vibration performance of the motor 1.
  • the vibration generated in the stator 2 is directly transmitted to the motor case 4, and the motor case 4 becomes a vibration source, resulting in a large noise.
  • the vibration energy applied to the stator 2 is directly (without being reduced) via the fixed portion integrated with the bolts or the like. It is transmitted to case 4.
  • the vibration energy applied to the stator 2 is directly (without being reduced) via the fixed portion integrated with the bolts or the like. It is transmitted to case 4.
  • the stator 2 is directly fixed to the motor case 4 via the inner frame 3
  • a part of the vibration energy applied to the stator 2 is consumed for elastically deforming the inner frame 3.
  • the Therefore, vibration energy transmitted to the motor case 4 through the inner frame 3 can be reduced. Therefore, it can be suppressed that the motor case 4 vibrates and the motor case 4 itself becomes a vibration source and a noise source.
  • the inner frame 3 does not fix the stator 2 to the inner peripheral surface 43 on the radially inner side of the bottomed cylindrical motor case 4 (cylindrical portion 4 a), but to the stator 2. It fixes with respect to the bottom part 4b of the motor case 4 separated in the axial direction (x-axis direction).
  • the gap CL1 (CL2) is sufficient if it is a gap that prevents the inner peripheral surface 43 of the motor case 4 and the outer peripheral surface 23 of the stator 2 (outer peripheral surface 34 of the inner frame 3) from coming into surface contact with each other.
  • the stator 2 is displaced in the radial direction by an electromagnetic excitation force.
  • the amount of displacement in the radial direction at this time is y.
  • the plate portion 3b (connecting portion 33) of the inner frame 3 functions as an elastic member (spring) that absorbs displacement (vibration) in the radial direction, and the radial rigidity k can be regarded as a spring constant. .
  • the value of the stiffness k is adjusted to reduce the force f, thereby reducing the vibration of the motor 1 and the external emission of noise.
  • the radial rigidity k of the connection portion 33 is set lower than the radial rigidity of the bottom portion 4 b of the motor case 4. Therefore, compared with the case where the rigidity k is equal to or higher than the rigidity of the bottom portion 4b of the motor case 4, the force f is reduced, thereby sufficiently exerting the function of the inner frame 3 as a vibration absorbing member. Thus, vibration transmitted from the stator 2 to the motor case 4 can be reduced.
  • the inner frame 3 is not coupled to the motor case 4 in the radial direction of the stator 2 as a donut-shaped disk as in the present embodiment. It may be coupled to the motor case 4 at substantially the same radial position as the fastening point on the stator 2 side. Also in this case, by setting the radial rigidity k of the inner frame 3 to be low, the same effect as described above can be obtained. Further, the donut-shaped disc-shaped inner frame 3 is not coupled to the motor case 4 on the radially inner side of the stator 2 as in the present embodiment, but is coupled to the motor case 4 on the radially outer side of the stator 2. It is good to do.
  • the inherent resonance mode of the motor case 4 itself is excited by the electromagnetic excitation force in the radial direction of the stator 2, and vibration with amplified vibration transmission characteristics may be input to the motor case 4. .
  • the vibration and noise of the motor 1 may deteriorate due to vibration amplification due to the resonance mode of the motor case 4.
  • the radial direction dimension of the motor case 4 may increase. If the radial dimension of the connecting portion 33 of the inner frame 3 (vibration transmission path length from the stator 2 to the motor case 4) is shortened in order to avoid this increase in size, the effect of reducing the vibration transmitted from the stator 2 to the motor case 4 is reduced. May be insufficient, and vibration and noise of the motor 1 may be deteriorated.
  • the inner frame 3 is coupled to the motor case 4 on the radially inner side of the stator 2. Therefore, it is possible to improve the sound vibration performance and the like of the motor 1 while avoiding the above inconvenience and suppressing an increase in the size of the motor 1. For example, it is possible to prevent the resonance mode of the motor case 4 from being excited by the electromagnetic excitation force of the stator 2 and amplifying the vibration. Further, the electromagnetic excitation force itself transmitted from the stator 2 to the motor case 4 can be reduced. That is, the main direction of vibration transmitted through the inner frame 3 by the electromagnetic excitation force of the stator 2 is the radial direction (radial), and therefore the inner frame 3 to the bottom 4b of the motor case 4 (bolt fastening portion 42).
  • the vector of the force f input to is symmetrical (opposite direction) with the axis O interposed therebetween.
  • the bolt fastening part 42 is located radially inward of the outer diameter of the motor case 4 (bottom part 4b), so the radius of the bolt fastening part 42 is relatively (radius at the bottom part 4b). Smaller than the outer part. Therefore, in the bolt fastening portion 42, the symmetric (opposite direction) forces f can be canceled (cancelled) and reduced.
  • the rigidity of the bolt fastening part 42 which is a joint portion of the inner frame 3 (bolt fastening part 32) is relatively high (than the radially outer part of the bottom part 4b).
  • the bolt fastening portion 42 is provided integrally with a bearing portion 41 for rotatably supporting the rotor. That is, the inner frame 3 (bolt fastening portion 32) is connected to the bearing portion 41 that is thickly provided to rotatably support the rotor via the bolt fastening portion 42.
  • the configuration of the motor 1 is simplified by connecting (coupling) the inner frame 3 (bolt fastening portion 32) to a portion (bearing portion 41, bolt fastening portion 42) having a relatively high rigidity in the motor case 4 from the beginning.
  • the vibration canceling action can be effectively obtained.
  • the bolt fastening portion 32 (bolt fastening portion 42) at a position radially inward of the stator core 2a, the inner frame 3 and the motor case 4 can be fastened by the bolt 6 even from the x-axis negative direction side. It becomes easy.
  • the motor 1 generates heat when driving force is generated as an electric motor and when power is generated as a generator.
  • the stator 2 is a heat source of the motor 1 and generates heat due to copper loss and iron loss.
  • the radial gap CL1 is provided between the outer peripheral surface 23 on the radially outer side of the stator 2 and the inner peripheral surface 43 of the motor case 4
  • heat generated in the stator 2 is efficiently transmitted to the motor case 4. Therefore, it is difficult to dissipate heat to the outside, and heat dissipation performance becomes a problem.
  • the heat conducting member 5 that is in thermal contact with the stator 2 and the motor case 4 is inserted into (inserted into) the gap CL1.
  • the heat generated in the stator 2 can be efficiently transmitted to the motor case 4 via the heat conducting member 5 to improve the heat dissipation performance.
  • the heat conduction efficiency can be improved by reducing the thermal resistance in the gap CL1 by the heat conducting member 5.
  • the heat conducting member 5 has a predetermined rigidity (elastic modulus) in the radial direction, and is in contact with both the outer peripheral surface 23 of the stator 2 and the inner peripheral surface 43 of the motor case 4. It is inserted into the gap CL1.
  • the stator pressure contact portion 51 of the heat conducting member 5 is in pressure contact with the outer peripheral surface 23 of the stator core 2a, the stator 2 is held with respect to the heat conducting member 5, and the heat conducting member 5 and the stator 2 can conduct heat. (Both are in thermal contact.)
  • the case pressure contact portion 52 is in pressure contact with the inner peripheral surface 43 of the motor case 4, the heat conducting member 5 is held with respect to the motor case 4, and the motor case 4 and the heat conducting member 5 can transfer heat ( Both are in thermal contact).
  • stator pressure contact portion 51 When the stator pressure contact portion 51 is in pressure contact with the outer peripheral surface 23 of the stator 2, the degree of adhesion between the two is increased, the contact thermal resistance between the two is suppressed, and the substantial contact area between the two is smaller (than when not pressed). Also increases slightly. As a result, the heat in the stator 2 is radiated well into the heat conducting member 5 through the stator pressure contact portion 51.
  • case pressure contact portion 52 is in pressure contact with the inner peripheral surface 43 of the motor case 4, the contact thermal resistance between the two is suppressed to be small, and the contact area between the two is slightly increased (as compared to the case where pressure contact is not performed). Thereby, the heat from the stator 2 transmitted to the heat conducting member 5 is favorably radiated to the motor case 4 through the case pressure contact portion 52.
  • the heat conducting member 5 may be provided only in a part of the stator 2 in the circumferential direction, or may be provided at a position that is not symmetrical in the circumferential direction of the stator 2. In this embodiment, since the heat conducting member 5 is provided over the entire circumference of the stator 2, the heat dissipation performance can be improved. Further, since the heat conducting member 5 is provided at a substantially symmetrical position in the circumferential direction of the stator 2, it is possible to dissipate heat generated by the stator 2 substantially evenly in the circumferential direction, thereby improving heat radiation performance.
  • both the pressure contact portions 51 and 52 of the heat conducting member 5 extend in the x-axis direction, but the both pressure contact portions 51 and 52 may be formed to extend in the circumferential direction. Alternatively, both the press contact portions 51 and 52 may be formed so as to extend spirally around the axis O. It is also conceivable to provide the inner frame 3 (cylindrical portion 3 a) not only in the axial end portion of the stator 2 but also on the radially outer side of the stator 2. However, in this case, when heat is released from the stator 2 in the radial direction, one element that becomes thermal resistance increases, which is disadvantageous in terms of thermal performance. On the other hand, in this embodiment, the inner frame 3 is installed only at the axial end portion of the stator 2 and is not provided outside the stator 2 in the radial direction. Therefore, the heat dissipation performance can be improved.
  • the size of the radial gap CL1 (radial direction) is set to be narrow to such an extent that the heat radiation performance by the heat conducting member 5 is more than a predetermined value. That is, when the gap CL1 is wide, the distance from the outer peripheral surface 23 of the stator 2 to the inner peripheral surface 43 of the motor case 4 becomes longer. For this reason, it is difficult to efficiently transmit the heat generated in the stator 2 to the motor case 4 to dissipate the heat to the outside. Further, if the gap CL1 is wide, even when the heat conduction member 5 is provided in the gap CL1, the amount of heat transfer through the heat conduction member 5 is limited, and there is a possibility that sufficient heat radiation performance cannot be ensured.
  • the size of the gap CL1 is set to a small value to such an extent that the heat dissipation performance by the heat conducting member 5 is exhibited more than a predetermined value. Thereby, it is possible to ensure sufficient heat dissipation performance without using a cooling medium. Thus, it is possible or easy to reduce the gap CL1 by reducing the thickness of the heat conducting member 5.
  • the heat conducting member 5 a spring composed of a thin plate that spreads facing the outer peripheral surface 23 of the stator 2 and the inner peripheral surface 43 of the motor case 4 is used.
  • the elasticity in the radial direction of the heat conducting member 5 can be adjusted by selecting the material of the heat conducting member 5 and processing the thin plate into an arbitrary shape that can be elastically deformed in the radial direction.
  • the thickness of the heat conducting member 5 is reduced to weaken the spring characteristics in the radial direction (decrease the elastic modulus in the radial direction), and the heat conducting member 5 installed in the gap CL1 has spring properties (restorability). Make it as small as possible.
  • reducing the radial spring characteristic of the heat conducting member 5 and reducing the gap CL1 is a structure for supporting the stator 2 with respect to the motor case 4, and the stator 2 at the axial end thereof.
  • a structure that is fixed to the motor case 4 it is possible or easy. That is, for example, when the stator 2 is supported on the motor case 4 only by the heat conducting member 5 installed in the gap CL1 without fixing the stator 2 to the motor case 4 at the axial end thereof, the heat conducting member 5 Without providing a substantial rigidity (without increasing the elastic modulus in the radial direction), it becomes difficult to support the stator 2.
  • the thickness of the heat conducting member 5 is increased to a certain extent in the radial direction. It is necessary to increase the gap CL1 to such an extent that the heat conduction member 5 does not lose its spring property (deformability) while strengthening its spring characteristics (increasing the elastic modulus in the radial direction).
  • the heat conducting member 5 of the present embodiment does not need to have a function of supporting the stator 2 or attenuating the electromagnetic excitation force in the radial direction of the stator 2.
  • the spring characteristics in the radial direction of the heat conducting member 5 can be arbitrarily weakened (the elastic modulus in the radial direction can be reduced), and therefore the gap CL1 can be set small as described above.
  • the rigidity (elastic modulus) in the radial direction of the heat conducting member 5 is such that the heat conducting member 5 (stator pressure contact portion 51, case pressure contact portion 52) is the stator.
  • the outer peripheral surface 23 of the motor 2 and the inner peripheral surface 43 of the motor case 4 are set so as to be able to contact with an appropriate pressure (which can maintain thermal contact despite the radial vibration of the stator 2).
  • the rigidity (elastic force) in the radial direction of the heat conducting member 5 is set to such a small value that the thermal contact between the stator 2 and the motor case 4 and the heat conducting member 5 can be maintained. It is possible to suppress the electromagnetic excitation force in the radial direction 2 from being transmitted to the motor case 4 via the heat conducting member 5.
  • stator 2 when the outer circumference of the outer side of the stator 2 in the radial direction is separated from the inner circumference of the motor case 4 in the radial direction and the stator 2 is fixed to the motor case 4 at its axial end, Compared to the case where the outer periphery is fixed to the inner periphery of the motor case 4 (including the case where the stator 2 is supported with respect to the motor case 4 by a member installed in the gap CL1), the support rigidity of the stator 2 in the circumferential direction is reduced.
  • the stator 2 may vibrate in the circumferential direction. This is because the stator core 2a can generate vibration due to electromagnetic excitation force not only in the radial direction but also in the circumferential direction.
  • the axial end of the stator 2 is fixed to the motor case 4 via the inner frame 3.
  • the support rigidity k of the stator 2 in the radial direction can be reduced by the inner frame 3, and the electromagnetic excitation force in the radial direction of the stator 2 can be attenuated by the inner frame 3.
  • the inner frame 3 can also secure a certain degree of support rigidity in the circumferential direction and the tilting direction of the stator 2 (direction inclined with respect to the axis O).
  • the circumferential end of the stator 2 is compared with the case where the axial end portion of the stator 2 is directly fixed to the motor case 4.
  • the support rigidity is reduced, and the possibility that the stator 2 vibrates in the circumferential direction due to the electromagnetic excitation force is further increased. Further, when the stator 2 is cantilevered and supported by the motor case 4 as in the present embodiment, the rigidity of the stator 2 relative to the motor case 4 is lower than the case where the stator 2 is supported at both ends. There is a high risk of circumferential vibration. When such circumferential vibration of the stator 2 is transmitted to the motor case 4, vibration of the motor 1 is generated and sound vibration performance may be deteriorated. This circumferential vibration occurs particularly in the low frequency region and affects sound vibration performance. Although vibration in the radial direction occurs in the entire frequency region, the influence on the sound vibration performance is large in the high frequency region.
  • the heat conduction member 5 installed in the gap CL1 is provided so that a frictional force can be generated in the circumferential direction with respect to the stator 2 or the motor case 4, thereby increasing the support rigidity of the stator 2 in the circumferential direction.
  • the vibration in the circumferential direction is suppressed.
  • the heat conducting member 5 has a predetermined rigidity (elastic modulus) in the circumferential direction, is not fixed to both the stator 2 and the motor case 4, and is installed in a floating manner in the gap CL1.
  • the heat conducting member 5 is provided so as to be movable relative to at least one of the stator 2 and the motor case 4 in the circumferential direction.
  • the heat conducting member 5 A circumferential frictional force is generated against the stator 2 or the motor case 4. This frictional force can suppress or attenuate the circumferential vibration of the stator 2 relative to the motor case 4. Therefore, it is possible to suppress the deterioration of the sound vibration performance due to the circumferential vibration propagating from the stator 2 to the motor case 4.
  • the heat conducting member 5 may be fixed to one of the stator 2 and the motor case 4 and not fixed to only the other.
  • the rigidity (elastic modulus) in the radial direction of the heat conducting member 5 is reduced in order to reduce the gap CL1 and improve the heat radiation performance, while the stator 2 or the motor case 4 is heated.
  • the circumferential rigidity (elastic modulus) of the heat conductive member 5 is increased. Therefore, by providing the gap CL1, the deterioration of the sound vibration performance due to the radial vibration of the stator 2 is suppressed, and the rebound to the sound vibration performance due to the vibration of the stator 2 is suppressed while improving the heat dissipation performance. can do.
  • the radial and circumferential rigidity (elastic modulus) of the heat conducting member 5 and the contact area of the heat conducting member 5 with the outer peripheral surface 23 of the stator 2 or the inner peripheral surface 43 of the motor case 4 are as follows. 5 and the stator 2 or the motor case 4 is set to a value that can exert a vibration suppression effect in the circumferential direction of the stator 2 at a predetermined level or more.
  • the rigidity (elastic modulus) in the radial direction of the heat conducting member 5, that is, the pressing force of the press contact portions 51 and 52 against the stator 2 and the motor case 4 is set to be relatively small (so that the thermal contact can be maintained). Even if it is a case, the frictional force which the heat conductive member 5 can generate
  • the amount of heat that can be transferred from the stator 2 to the motor case 4 can be increased by increasing the wave number of the heat conducting member 5 and increasing the number of the pressure contact portions 51 and 52. Therefore, the heat dissipation performance can be improved. In this way, increasing the wave number of the heat conducting member 5 is possible or easy by reducing the plate thickness of the heat conducting member 5.
  • the heat conducting member 5 is not fixed to at least one of the stator 2 and the motor case 4. Therefore, the heat conduction member 5 generates a frictional force in the circumferential direction with respect to the stator 2 or the motor case 4, thereby suppressing the vibration in the circumferential direction of the stator 2 due to the electromagnetic excitation force, thereby deteriorating the sound vibration performance. Can be suppressed.
  • FIG. 4 is a front view of a portion of the stator 2 and the heat conducting member 5 housed in the motor case 4 (cylindrical portion 4a) of this embodiment as seen from the x-axis direction.
  • the outer peripheral surface 23 of the stator 2 is provided with a rougher surface than the inner peripheral surface 43 of the motor case 4 because of differences in materials and processing methods. This is expressed by the unevenness drawn on the outer peripheral surface 23.
  • the heat conducting member 5 is composed of a plurality of units installed over the entire circumference of the stator 2 so as to cover the outer circumferential surface 23 of the stator 2.
  • Each unit has a purse-like shape in which a Z-shape and an S-shape (Z reversed in the left-right direction) are connected in the horizontal direction (circumferential direction) when viewed from the x-axis direction.
  • Each unit is positioned inwardly in the radial direction and spreads in a flat plate shape.
  • the stator pressure contact portion 51 spreads out from both sides in the circumferential direction of the stator pressure contact portion 51 toward the central side in the circumferential direction.
  • connecting portions 50 that spread
  • a case press-contact portion 52 that spreads in a flat plate shape from the radially outer end of both connecting portions 50 so as to be folded back from the circumferential center side of the unit toward both sides in the circumferential direction.
  • a plurality of units are inserted and installed (inserted) into the gap CL1 so that the circumferential ends of the case press contact portions 52 of adjacent units are in contact with each other, whereby the heat conducting member 5 is installed over the entire circumference of the stator 2. ing.
  • the heat conducting member 5 When viewed from the x-axis direction, the heat conducting member 5 composed of a plurality of units includes a trapezoid whose bottom is the stator press-contact portion 51 and the inner peripheral surface 43 of the motor case 4 (opposed to this in the radial direction),
  • the trapezoidal wave shape is such that a trapezoid whose bottom is the case press-contact portion 52 and the outer peripheral surface 23 of the stator 2 (opposite to this in the radial direction) continues in the circumferential direction.
  • stator press-contact portion 51 is wider than the inner peripheral surface 43 of the motor case 4, and among the bottom of the latter trapezoid, the case press-contact portion 52 is wider than the outer peripheral surface 23 of the stator 2. is there.
  • the circumferential dimension of the stator press-contact portion 51 (configured by adjacent units) is larger than the circumferential dimension of the inner circumferential surface 43 of the motor case 4 (which faces this in the radial direction).
  • the circumferential dimension of the case pressure contact portion 52 is larger than the circumferential dimension of the outer peripheral surface 23 of the motor stator 2 (which faces this in the radial direction).
  • the function and effect will be described.
  • the contact area of the heat conductive member 5 with respect to the stator 2 or the motor case 4 can be increased as compared with the case where the heat conductive member 5 has a sine wave shape as in the first embodiment.
  • the heat dissipation performance by the heat conductive member 5 can be improved.
  • the contact area 51, 52 of the heat conducting member 5 is provided wider than the surfaces 43, 23 facing each other, thereby increasing the contact area more effectively. Therefore, the above-described effects can be improved.
  • Other functions and effects are the same as those of the first embodiment.
  • the heat conducting member 5 has a trapezoidal wave shape when viewed from the axial direction of the stator 2. Therefore, the heat dissipation performance can be improved and the deterioration of the sound vibration performance can be more effectively suppressed.
  • FIG. 5 is a view similar to FIG. 4, and is a front view of a part of the stator 2 and the heat conducting member 5 housed in the motor case 4 (cylindrical portion 4 a) of this embodiment as seen from the x-axis direction.
  • the heat conducting member 5 is composed of a plurality of units installed over the entire circumference of the stator 2 so as to cover the outer circumferential surface 23 of the stator 2.
  • Each unit has a flat, substantially C-shape when viewed from the x-axis direction. Specifically, each unit is located on the inner side in the radial direction and spreads out in the form of a flat plate, and the connection extends from the one end in the circumferential direction of the stator pressure contact portion 51 to the outer side in the radial direction while curving in a C shape.
  • Part 50 and a case press-contact part 52 that spreads out in a flat plate shape from the radially outer end of the connection part 50 and faces the stator press-contact part 51 in the radial direction.
  • Each unit is not limited to a C shape with one end in the lateral direction opened as viewed from the x-axis direction, and may be a flat annular shape with both ends in the lateral direction closed.
  • a plurality of units are inserted and installed (inserted) into the gap CL1 through a slight circumferential gap between adjacent units, whereby the heat conducting member 5 is installed over the entire circumference of the stator 2.
  • the heat conducting member 5 composed of a plurality of units has a chain shape in which a plurality of flat, substantially C-shaped units (in other words, a shape in which a U-shape is collapsed) are continuous.
  • the contact area of the heat conducting member 5 with respect to the stator 2 or the motor case 4 can be increased by setting the heat conducting member 5 (each unit) to a flat C-shape and raising the radiation fins. Thereby, the heat dissipation performance by the heat conductive member 5 can be improved. In addition, it is possible to suppress the propagation of sound vibration from the stator 2 to the motor case 4 by increasing the circumferential frictional force of the heat conducting member 5 with respect to the stator 2 or the motor case 4. Other functions and effects are the same as those of the first embodiment.
  • the heat conducting member 5 (each unit) has a flat C shape when viewed from the axial direction of the stator 2. Therefore, the heat dissipation performance can be improved and the deterioration of the sound vibration performance can be more effectively suppressed.
  • FIG. 6 is a view similar to FIG. 4 and is a front view of a part of the stator 2 and the heat conducting member 5 housed in the motor case 4 (cylindrical portion 4a) of the present embodiment as seen from the x-axis direction.
  • the heat conducting member 5 is composed of a thin plate that extends opposite to the outer peripheral surface 23 of the stator 2 and the inner peripheral surface 43 of the motor case 4, is formed in an annular shape, and extends over the entire circumference of the stator 2. is set up.
  • the heat conducting member 5 is formed so as to wave alternately by moving radially outward and inward alternately as it advances along its circumferential direction.
  • the heat conducting member 5 has a trapezoidal shape with the stator press-contact portion 51 and the inner peripheral surface 43 of the motor case 4 as the bottom, and a case press-contact portion 52 and the outer peripheral surface 23 of the stator 2 as the base.
  • the inner peripheral surface 43 of the motor case 4 is wider than the stator pressure contact portion 51 in the bottom of the former trapezoid, and the outer periphery of the stator 2 is larger than the case pressure contact 52 in the latter trapezoid bottom.
  • the surface 23 is wider. In a state where both the pressure contact portions 51 and 52 are in pressure contact with the surfaces 23 and 43 constituting the gap CL1, the curvatures of the both pressure contact portions 51 and 52 viewed from the x-axis direction can be substantially equated with the curvatures of the surfaces 23 and 43, respectively.
  • the contact area of the heat conducting member 5 per unit area W 0 with the stator 2 (area occupied by the stator pressure contact portion 51) is W 1
  • the contact area of the heat conducting member 5 per unit area W 0 with the motor case 4 (the area) which the case contact portion 52 occupies a W 2.
  • the thermal resistance per unit area W 0 from the stator 2 to the motor case 4 is R
  • the thermal resistance per unit area W 0 depending on the thermal conduction of the heat conducting member 5 is R v0
  • the unit on the stator 2 side The thermal resistance per unit area W 0 with the stator 2 (area occupied by the stator pressure contact portion 51) is W 1
  • the contact area of the heat conducting member 5 per unit area W 0 with the motor case 4 (the area) which the case contact portion 52 occupies a W 2.
  • the thermal resistance per unit area W 0 from the stator 2 to the motor case 4 is R
  • the thermal resistance per unit area W 0 depending on the thermal conduction of the heat conducting member 5 is R v0
  • interface thermal resistance per area W 0 (the contact thermal resistance per unit area W 0 at the contact portion between the stator 2 and the heat conductive member 5) and R s1, interface thermal resistance per unit area W 0 of the motor casing 4 side (contact thermal resistance per unit area W 0 at the contact portion of the motor case 4 and the heat conductive member 5) and R s2.
  • the values of R s1 and R s2 can be derived from experiments, for example. At this time, the following equation holds.
  • R R v0 + R s1 ⁇ W 0 / W 1 + R s2 ⁇ W 0 / W 2
  • R s1 ⁇ W 0 / W 1 R s2 ⁇ W 0 / W 2
  • Ie W 2 / W 1 R s2 / R s1
  • the shape, range, etc. of the contact surface (both pressure contact portions 51, 52) of the heat conducting member 5 are determined so that Other configurations are the same as those of the first embodiment.
  • the heat conducting member 5 has a trapezoidal shape when viewed from the axial direction of the stator 2. Therefore, like Example 2, while improving heat dissipation performance, the deterioration of sound vibration performance can be suppressed more effectively.
  • the surface roughness of the stator 2 and the motor case 4 in contact with the heat conducting member 5 is different from each other. Therefore, when the shape and range of the contact surfaces of the heat conducting member 5 with respect to the stator 2 and the motor case 4 are not adjusted, the thermal resistance at these contact surfaces becomes larger than necessary, and the effect of improving the heat dissipation performance is limited. There is a risk of being.
  • the ratio W 2 / W 1 of the contact area W 2 of the contact area W 1 and the motor case 4 of the stator 2 in the heat conductive member 5 is
  • the shape, range, and the like of the contact surface of the heat conducting member 5 are set so that the ratio R s2 / R s1 of the interfacial thermal resistance R s1 on the stator 2 side and the interfacial thermal resistance R s2 on the motor case 4 side.
  • the contact area W of the heat conducting member 5 is increased on the side of the stator 2 and the motor case 4 where the interfacial thermal resistance R s is large (the surface is rough and the thermal resistance per unit area is large).
  • the contact area W of the heat conducting member 5 is reduced.
  • the thermal resistance is balanced between both contact portions, and the series thermal resistance R from the stator 2 to the motor case 4 is minimized as a whole. Therefore, the heat dissipation performance by the heat conducting member 5 can be improved.
  • the shape of the heat conductive member 5 is not restricted to the thing of FIG. Other functions and effects are the same as those of the first embodiment.

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

Abstract

La présente invention vise à proposer une machine électrique rotative permettant d'améliorer la performance de dissipation de la chaleur générée par un stator. A cette fin, un moteur (une machine électrique rotative) (1) comprend un stator annulaire (2) et un carter de moteur (4) dans lequel est logé le stator (2). Un jeu prescrit (CL1) est ménagé en direction radiale entre une surface périphérique intérieure (43) du carter de moteur (4) et une surface périphérique extérieure (23) du stator (2) au niveau d'un côté extérieur de ce dernier dans la direction radiale. Une extrémité du stator (2) est supportée en direction axiale sur le carter de moteur (4). Un élément thermoconducteur (5) est inséré dans le jeu (CL1) dans la direction radiale, ledit élément thermoconducteur (5) étant mis en contact thermique avec le stator (2) et le carter de moteur (4).
PCT/JP2014/052017 2013-03-07 2014-01-30 Machine électrique rotative WO2014136503A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015504200A JPWO2014136503A1 (ja) 2013-03-07 2014-01-30 回転電機

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JP2013044986 2013-03-07
JP2013-044986 2013-03-07

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WO2014136503A1 true WO2014136503A1 (fr) 2014-09-12

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016067085A (ja) * 2014-09-24 2016-04-28 日産自動車株式会社 回転電機の組立方法
JP2016067086A (ja) * 2014-09-24 2016-04-28 日産自動車株式会社 回転電機
JP2016067084A (ja) * 2014-09-24 2016-04-28 日産自動車株式会社 回転電機の組立方法および回転電機
DE102014223012A1 (de) * 2014-11-12 2016-05-12 Bayerische Motoren Werke Aktiengesellschaft Akustische Entkopplung von Stator und Gehäuse einer E-Maschine
CN107503923A (zh) * 2017-09-22 2017-12-22 保定准择恒流泵制造有限公司 蠕动泵头及蠕动泵

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08182277A (ja) * 1994-09-30 1996-07-12 Aisin Seiki Co Ltd スイッチドリラクタンスモータ
JPH08251857A (ja) * 1995-03-06 1996-09-27 Hitachi Ltd 回転電機
JPH09322466A (ja) * 1996-06-03 1997-12-12 Hitachi Ltd 車両用交流発電機
JP2002542626A (ja) * 1999-04-20 2002-12-10 タイコ・エレクトロニクス・コーポレイション 裸のシリコンチップを搭載した回路板からの熱の散逸
JP2012100516A (ja) * 2010-10-06 2012-05-24 Jtekt Corp モータ及び電動パワーステアリング装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08182277A (ja) * 1994-09-30 1996-07-12 Aisin Seiki Co Ltd スイッチドリラクタンスモータ
JPH08251857A (ja) * 1995-03-06 1996-09-27 Hitachi Ltd 回転電機
JPH09322466A (ja) * 1996-06-03 1997-12-12 Hitachi Ltd 車両用交流発電機
JP2002542626A (ja) * 1999-04-20 2002-12-10 タイコ・エレクトロニクス・コーポレイション 裸のシリコンチップを搭載した回路板からの熱の散逸
JP2012100516A (ja) * 2010-10-06 2012-05-24 Jtekt Corp モータ及び電動パワーステアリング装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016067085A (ja) * 2014-09-24 2016-04-28 日産自動車株式会社 回転電機の組立方法
JP2016067086A (ja) * 2014-09-24 2016-04-28 日産自動車株式会社 回転電機
JP2016067084A (ja) * 2014-09-24 2016-04-28 日産自動車株式会社 回転電機の組立方法および回転電機
DE102014223012A1 (de) * 2014-11-12 2016-05-12 Bayerische Motoren Werke Aktiengesellschaft Akustische Entkopplung von Stator und Gehäuse einer E-Maschine
CN107503923A (zh) * 2017-09-22 2017-12-22 保定准择恒流泵制造有限公司 蠕动泵头及蠕动泵

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