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WO2016174768A1 - Moteur rotatif et compresseur - Google Patents

Moteur rotatif et compresseur Download PDF

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Publication number
WO2016174768A1
WO2016174768A1 PCT/JP2015/062981 JP2015062981W WO2016174768A1 WO 2016174768 A1 WO2016174768 A1 WO 2016174768A1 JP 2015062981 W JP2015062981 W JP 2015062981W WO 2016174768 A1 WO2016174768 A1 WO 2016174768A1
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WO
WIPO (PCT)
Prior art keywords
winding
inclination angle
core
wall portion
stator
Prior art date
Application number
PCT/JP2015/062981
Other languages
English (en)
Japanese (ja)
Inventor
裕貴 田村
良平 宇野
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to GB1716742.0A priority Critical patent/GB2553463B/en
Priority to CN201580078919.5A priority patent/CN107534342B/zh
Priority to PCT/JP2015/062981 priority patent/WO2016174768A1/fr
Priority to JP2017515349A priority patent/JP6362771B2/ja
Publication of WO2016174768A1 publication Critical patent/WO2016174768A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/38—Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation

Definitions

  • the present invention relates to a rotary motor and a compressor having a stator having a core made of laminated steel plates.
  • the rotary electric motor has a stator having a core made of laminated steel plates on the outer peripheral side of the rotor into which the main shaft is inserted.
  • Compressors that use a rotary motor as a power source are increasingly required to improve reliability from the viewpoints of higher performance, enhanced heat resistance, and enhanced oil and refrigerant resistance against refrigeration oil and refrigerant.
  • improving the coil space factor is effective for improving the reliability of the compressor.
  • As a method for improving the space factor there is known an aligned winding in which conducting wires constituting a coil are regularly aligned on an insulator and wound (see, for example, Patent Documents 1 to 4).
  • Patent Document 1 discloses a winding method in which a guide groove serving as a winding guide is provided in an insulator to restrict the movement of a conducting wire.
  • Patent Document 2 discloses a method of winding a conductive wire around a stator core.
  • the insulator described in Patent Document 3 is provided with a concave portion on a surface facing the core of the protruding portion protruding toward the inner diameter side, so that the inner wall portion formed at the inner diameter side end portion of the protruding portion is It is configured to tilt toward the outer diameter side. Further, as in Patent Document 4, by adjusting the tension at the time of winding, the contact force between the conducting wire in the winding and the insulator is suppressed, and the damage to the insulating coating of the conducting wire is reduced. A technique for improving the performance is also known.
  • the core of the stator is made of laminated steel plates as described above, the tightening that causes the core thickness to shrink in the axial direction occurs due to the tension applied during the winding of the coil.
  • the outer wall portion of the insulator is inclined to the inner diameter side from the plane orthogonal to the radial direction following the change in the core thickness due to the tightening. Therefore, when the conducting wire constituting the coil is wound around the outer wall portion, the conducting wire collides with or comes into contact with the outer wall portion, and the situation where the aligned winding is hindered or the insulating coating of the conducting wire is damaged occurs. For this reason, it is desired to suppress the outer wall portion of the insulator from obstructing the winding of the coil.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a rotary motor and a compressor that suppress an outer wall portion of an insulator from interfering with a coil winding.
  • a rotary electric motor has a main shaft, a rotor into which the main shaft is inserted, and a stator provided in an annular shape on the outer peripheral side of the rotor, and the stator is formed by laminating a plurality of electromagnetic steel plates.
  • Formed in the core insulators provided at one end and the other end in the axial direction of the core, and a conductive wire wound between the insulator at one end and the insulator at the other end via the core.
  • Each insulator is provided on the outer diameter side of the winding portion in which the conductive wire is wound in the radial direction, and in the state before being wound, the inner surface is in the axial direction.
  • the plurality of insulators since the plurality of insulators have the outer wall portion inclined by the preset outer inclination angle from the axial direction to the outer diameter side in front of the winding, the thickness of the core due to the tightening of the insulator is increased. Even if the outer wall portion is inclined toward the inner diameter side following the change, the outer wall portion is inclined toward the outer diameter side by an amount corresponding to the outer inclination angle, so that the outer wall portion of the insulator can be prevented from interfering with the winding of the coil.
  • FIG. 3 is a transverse sectional view taken along the line AA in FIG. 2. It is a longitudinal cross-sectional view which shows typically the state before winding among the structures of the stator which the rotary electric motor of FIG. 1 has. It is a longitudinal cross-sectional view which shows typically the state after winding among the structures of the stator which the rotary electric motor of FIG. 1 has.
  • FIG. 16 is a longitudinal sectional view for explaining a problem related to a winding portion of the rotor of FIG. 15.
  • FIG. 1 is a longitudinal sectional view schematically showing a compressor according to the first embodiment.
  • the compressor 10 is composed of, for example, a scroll compressor, and is one of components of a refrigeration cycle used in various industrial machines such as a refrigerator, a freezer, an air conditioner, a refrigeration measure, and a water heater.
  • the compressor 10 sucks the refrigerant circulating in the refrigeration cycle, compresses it, and discharges it as a high-temperature and high-pressure state.
  • the compressor 10 includes a sealed container 20 constituting an outer shell, a suction pipe 30 that sucks refrigerant gas into the sealed container 20, and a discharge pipe 40 that discharges compressed refrigerant gas.
  • the compressor 10 includes a compression mechanism 50 that compresses refrigerant in the sealed container 20, a rotary electric motor 60 that drives the compression mechanism 50 by rotating the main shaft 21, and an end of the main shaft 21 on the rotary electric motor 60 side. And an oil pump 22 immersed in the lubricating oil 22a.
  • the sealed container 20 is formed of a sealed shell or casing and houses the compression mechanism unit 50 and the rotary motor 60.
  • the main shaft 21 is rotationally driven by the rotary electric motor 60.
  • the compression mechanism unit 50 includes a fixed scroll 51 provided with a fixed spiral body 51a and a swing scroll 52 provided with a swing spiral body 52a.
  • the rotary electric motor 60 includes a rotor 61 into which the main shaft 21 is inserted, and a stator 70 provided in an annular shape on the outer peripheral side of the rotor 61.
  • the stator 70 includes a core 71 formed by laminating a plurality of electromagnetic steel plates, insulators 80 provided at one end and the other end in the axial direction of the core 71, an insulator 80 having one end of the conductive wire, and an insulator at the other end. 80, and a coil 72 formed by being wound through a core 71 between the two.
  • the core 71 is a laminated steel plate, and is configured by laminating a plurality of electromagnetic steel plates.
  • the conducting wire constituting the coil 72 is made of, for example, a magnet wire, and the surface thereof is covered with an insulating film (not shown).
  • the compressor 10 has a sealed terminal 24 that is welded to the sealed container 20, takes the lead wire 23 from the stator 70 of the rotary electric motor 60 to the outside of the sealed container 20, and is electrically connected to an external power source. ing.
  • a vertical type hermetic scroll compressor is illustrated, but a horizontal type may be adopted. Further, as the compressor 10, a vane type compressor may be adopted.
  • the operation of the compressor 10 will be described.
  • the stator 70 and the rotor 61 When the sealed terminal 24 is energized, the stator 70 and the rotor 61 generate torque, and the main shaft 21 rotates.
  • the orbiting scroll 52 coupled to the main shaft 21 starts to rotate and cooperates with the fixed scroll 51 to start compressing the refrigerant gas.
  • the refrigerant gas is sucked from the suction pipe 30 and flows into the sealed container 20, and is sucked and compressed into the compression mechanism portion 50 formed by the fixed scroll 51 and the swing scroll 52, and then the discharge pipe.
  • the refrigerant is discharged to the refrigerant circuit outside the sealed container 20 through 40.
  • the oil pump 22 is driven to suck the lubricating oil 22a, and the lubricating oil is supplied to the bearings and the like through the oil supply passage 21a provided in the main shaft 21 and then lubricated. Return to the bottom of 20.
  • FIG. 2 is a longitudinal sectional view schematically showing the rotary electric motor 60 included in the compressor 10.
  • FIG. 3 is a cross-sectional view taken along line AA in FIG.
  • the stator 70 has an annular core 71 on which electromagnetic steel plates made of a high permeability material such as iron are laminated.
  • the core 71 has an annular back yoke portion 71a and a plurality of teeth portions 71b protruding from the back yoke portion 71a to the inner diameter side.
  • the plurality of tooth portions 71b are arranged along the circumferential direction.
  • Resin-molded insulators 80 are respectively disposed at one end and the other end of the tooth portion 71b in the axial direction.
  • a coil 72 is wound around the insulator 80, and a lead wire 23 serving as a connection line with a power source is connected to the coil 72.
  • the coil 72 is wound around the teeth portion 71b via a winding portion 81 (see FIG. 4) of the insulator 80.
  • the rotor 61 includes a boss 61a in which steel plates made of a high permeability material such as iron are laminated, and magnet insertion holes 61b provided in the circumferential direction by the number corresponding to the magnetic poles along the outer periphery of the boss 61a.
  • a permanent magnet 61c embedded in the magnet insertion hole 61b and constituting the magnetic pole of the field of the rotary electric motor 60, and end plates 61d made of a non-magnetic material and provided at both ends in the axial direction of the boss 61a. Have.
  • the rotor 61 includes a balance weight 61e disposed on the end plate 61d at one end or both ends in the axial direction of the boss 61a, and a rivet 61f that passes through the boss 61a, the end plate 61d, and the balance weight 61e. ,have. That is, in the rotor 61, the end plate 61d, the boss 61a, and the balance weight 61e are fastened by the rivet 61f.
  • FIG. 4 is a longitudinal sectional view schematically showing a state before winding in the structure of the stator 70 included in the rotary electric motor 60.
  • the insulator 80 insulates the coil 72 from the tooth portion 71b, and has a winding portion (insulator tooth portion) 81 around which a conducting wire constituting the coil 72 is wound in the radial direction.
  • the insulator 80 is provided with an inner wall portion 82 and an outer wall portion 83 extending in a direction away from the core 71 on the inner diameter side and the outer diameter side of the tooth portion 71b, respectively.
  • the winding part 81 and the inner wall part 82 are in contact with each other, and the winding part 81 and the outer wall part 83 are also in contact with each other.
  • the inner wall portion 82 prevents the coil 73 from collapsing toward the inner diameter side
  • the outer wall portion 83 prevents the coil 73 from collapsing toward the outer diameter side. Therefore, the height in the axial direction is higher in the inner wall portion 82 and the outer wall portion 83 than in the winding portion 81.
  • the height of the inner wall part 82 and the outer wall part 83 generally, there are many that set the outer wall part 83 higher than the inner wall part 82, and FIG. 4 and FIG. However, it is not limited to this. That is, for example, the inner wall portion 82 and the outer wall portion 83 may be set to the same height, and the inner wall portion 82 may be set higher than the outer wall portion 83.
  • the outer wall portion 83 is provided on the outer diameter side of the winding portion 81 and is inclined by an outer inclination angle ⁇ o set in advance toward the outer diameter side with respect to the axial direction in a state before winding (before winding). It is a thing. That is, the outer wall portion 83 is inclined by the outer inclination angle ⁇ o with respect to the plane S orthogonal to the radial direction.
  • the outer inclination angle ⁇ o is configured to be equal to or larger than a reference inclination angle ⁇ MAX calculated based on the thickness and number of stacked cores 71 and the outer diameter and inner diameter of the stator 70.
  • FIG. 5 is a longitudinal sectional view schematically showing a state after winding in the structure of the stator 70 included in the rotary electric motor 60.
  • the core 71 after being wound decreases in thickness as it goes to the inner diameter side due to tightening at the time of winding, and a plane T (contact surface between the core 71 and the insulator 80 before winding) perpendicular to the axial direction. Is inclined at an angle ⁇ .
  • the inclination angle ⁇ and the reference inclination angle ⁇ MAX will be described. Since the amount of winding of the core 71 does not exceed the total sum of the gaps between the cores 71 made of laminated steel sheets, the reference inclination angle ⁇ MAX that is the maximum value of the inclination angle ⁇ is obtained by the following formula 1. Can do.
  • H [mm] is the thickness of the core 71 which is a laminated steel plate.
  • X [sheets] is the number of laminated magnetic steel sheets constituting the core 71.
  • ⁇ [mm] is a gap (lamination gap) between laminated electromagnetic steel sheets.
  • ⁇ O [mm] is the outer diameter of the stator 70, and
  • ⁇ i [mm] is the inner diameter of the stator 70.
  • the outer inclination angle ⁇ o of the first embodiment is set so that the reference inclination angle ⁇ MAX obtained by Equation 1 is a lower limit value in order to avoid contact between the conductors constituting the coil 72 and the insulator 80 ( ⁇ o ⁇ ⁇ MAX ).
  • the inclination angle ⁇ is equal to or less than the reference inclination angle ⁇ MAX ( ⁇ ⁇ ⁇ MAX ).
  • the outer wall portion 83 When the core 71 is inclined by the inclination angle ⁇ by tightening, the outer wall portion 83 also follows the inclination of the core 71 and is inclined toward the inner diameter side by the inclination angle ⁇ .
  • the outer wall portion 83 in the first embodiment has a shape having an inclination of the outer inclination angle ⁇ o that is equal to or larger than the reference inclination angle ⁇ MAX on the outer diameter side before winding,
  • the outer wall portion 83 is not located at the bottom. That is, as shown in FIG. 5, the angle formed by the plane T perpendicular to the axial direction and the side surface (inner surface) on the inner diameter side of the outer wall 83 is 90 degrees or less. For this reason, it is possible to avoid the conductive wire wound in the vicinity of the outer wall portion 83 from coming into contact with the outer wall portion 83 during winding by aligned winding.
  • the rotary motor 60 As described above, the rotary motor 60, a plurality of insulators 80, before the winding, has an outer wall portion 83 which is inclined radially outward by the outer inclination angle theta o with respect to the axial direction. For this reason, even if the insulator 80 is inclined toward the inner diameter side following the change in the core thickness due to the tightening, the outer wall portion 83 is inclined toward the outer diameter side by the outer inclination angle ⁇ o. Can prevent the winding of the coil 72 from being obstructed. Therefore, according to the rotary electric motor 60, it is possible to avoid winding disturbance and damage to the insulating film on the surface of the conductive wire caused by the collision between the conductive wire wound around the winding portion 81 and the outer wall portion 83.
  • the motor efficiency can be improved.
  • the conducting wire and the outer wall 83 do not contact each other, the winding speed can be increased, so that productivity can be improved.
  • it is possible to suppress the manufacturing deterioration of the insulating film of the conductive wire it is possible to improve the reliability.
  • the temperature environment in the compressor 10 is affected by the refrigerant gas or the heat generated by the stator 70, and the like. For this reason, depending on the operating conditions, the temperature in the compressor 10 is ⁇ 50 ° C. to 150 ° C. Therefore, it is necessary to ensure reliability in a wide temperature range.
  • the conductive wire of the coil 72 covered with an insulating film mainly composed of a resin material it is essential to ensure reliability particularly at high temperatures, and damage to the insulating film during winding must be avoided.
  • a mixed refrigerant containing HFO-1123 such as HFC-32 refrigerant, which has a higher temperature and pressure rise during compression than the conventionally used R410A, R407C, R404A refrigerants, etc. is used.
  • HFO-1123 such as HFC-32 refrigerant
  • R410A, R407C, R404A refrigerants, etc. it is required to cope with the temperature rise in the compressor 10, and it is required to improve the motor efficiency by high-precision aligned winding and to improve the reliability by reducing the damage of the insulating coating during winding.
  • the outer wall portion 83 is inclined in advance by the outer inclination angle ⁇ o in consideration of the deformation of the core 71 due to the winding. Therefore, the motor efficiency can be improved. Moreover, since the damage of the insulating film at the time of winding can be prevented, the reliability is improved. Therefore, the compressor 10 can use a single refrigerant made of HFO-1123, a mixed refrigerant containing HFO-1123, or the like as the refrigerant circulating in the refrigeration cycle.
  • the whole outer wall part 83 is comprised so that the outer inclination angle (theta) o may be made, only the side surface (contact surface with the coil 72) of the inner diameter side of the outer wall part 83 is.
  • You may comprise so that the outer inclination
  • a side of the inner diameter side of the outer wall 83, and only a portion of collision with lead constituting the coil 72 may be configured so as to form an outer inclination angle theta o. That is, for example, the tip portion of the outer wall portion 83 and the contact portion of the coil 72 may have different inclination angles, and the inner wall side and outer side surface of the outer wall portion 83 may be curved. Good. Even if it does in this way, the collision with a conducting wire and the insulator 80 can be prevented.
  • the thickness of the outer wall portion 83 needs to be set in consideration of the strength that can withstand the tension at the time of winding, the releasability at the time of molding, and burning.
  • FIGS. 6 and 7 are longitudinal sectional views schematically showing the state before and after winding in the structure of the stator included in the compressor according to the second embodiment.
  • the same constituent members as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
  • the insulator 180 according to the second embodiment is provided on the inner diameter side of the winding portion 181 on which the conducting wire constituting the coil 72 is wound, and on the outer diameter side with respect to the axial direction before the winding.
  • the inner wall portion 182 is inclined by a preset inner inclination angle ⁇ i and the outer diameter side of the winding portion 181 and is inclined by the outer inclination angle ⁇ o with respect to the plane S orthogonal to the radial direction.
  • an outer wall portion 83 The inner surface of the inner wall portion 182 has an inner inner lower edge portion 182a located on the core 71 side, and an inner inner tip portion 182b located at the tip.
  • the inner inclination angle ⁇ i of the inner wall portion 182 is set such that the avoidance angle ⁇ d that can avoid contact with the rotor 61 is a lower limit, and the reference inclination angle ⁇ MAX obtained by the above equation 1 is the upper limit ( ⁇ d ⁇ ⁇ i ⁇ ⁇ MAX ).
  • the inner inclination angle ⁇ i is set with the reference inclination angle ⁇ MAX as the lower limit ( ⁇ i > ⁇ MAX )
  • the inner wall portion 182 is placed on the rotation trajectory of the conducting wire wound in the vicinity thereof. Since it protrudes, the collision between the conductor and the insulator 180 cannot be avoided.
  • the avoidance angle ⁇ d that can avoid contact with the rotor 61 is an inner wall inner diameter inclination that is a radial distance between the inner inner lower edge portion 182a and the inner inner tip portion 182b of the inner wall portion 182 before the winding.
  • the amount Di may be set so that the distance between the rotor 61 and the inner inner lower edge 182a (shortest distance from the rotor 61) is D min or more (D min ⁇ Di). With this setting, since the radial distance between the rotor 61 and the inner inner tip 182b after winding is 0 or more, the inner wall 182 is prevented from jumping out toward the inner diameter, Contact with the inner wall portion 182 can be avoided.
  • the inner wall 182 is inclined in advance in the outer radial direction by the inner inclination angle ⁇ i before the winding, and the outer wall 83 is outer in the outer radial direction. I am inclined by inclination angle ⁇ o. For this reason, contact with the inner wall part 182 and the outer wall part 83, and the conducting wire wound around these can be avoided. That is, as shown in FIG. 7, the angle formed by the plane T orthogonal to the axial direction and the side surface on the outer diameter side of the inner wall portion 182 and the side surface on the inner diameter side of the outer wall portion 83 is 90 degrees or less.
  • the insulator 180 is configured such that the inner wall inner diameter inclination amount Di is not less than the distance Dmin between the rotor 61 and the inner inner lower edge portion 182a, contact between the rotor 61 and the inner wall portion 182 is avoided. can do.
  • the rotary electric motor and the compressor according to the second embodiment it is possible to achieve more accurate aligned winding, and thus it is possible to improve motor efficiency. Further, since the conducting wire does not contact the inner wall portion 182 and the outer wall portion 83, productivity can be improved by increasing the winding speed. And since manufacturing deterioration of the insulating film of a conducting wire can be suppressed, combined with the effect that the contact between the rotor 61 and the inner wall portion 182 can be avoided, reliability can be improved.
  • the entire inner wall portion 182 is configured to have an inner inclination angle ⁇ i , but the inclination of the side surface on the outer diameter side of the inner wall portion 182 and the inner diameter of the inner wall portion 182 are adopted. You may make it set separately the inclination of the side surface of a side. In other words, the inclination angle of the side surface on the inner diameter side of the inner wall portion 182 may be set so that the inner / inner tip portion 182b does not contact the rotor 61 after winding. Further, the inclination angle of the side surface on the outer diameter side of the inner wall portion 182 may be set so as to avoid contact with the conducting wire during winding within the range of ⁇ i ⁇ .
  • the thickness of the inner wall portion 182 needs to be set in consideration of the strength that can withstand the tension at the time of winding, the releasability at the time of molding, and burning.
  • FIGS. 8 and 9 are longitudinal sectional views schematically showing the state before and after the winding in the structure of the stator included in the compressor according to the third embodiment.
  • the same components as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted.
  • the insulator 280 according to the third embodiment is provided on a winding portion 281 around which a conducting wire is wound and an inner diameter side of the winding portion 281, and before the winding, an inner inclination angle ⁇ toward the outer diameter side with respect to the axial direction.
  • the setting of the inner inclination angle ⁇ i of the inner wall portion 182 and the outer inclination angle ⁇ o of the outer wall portion 83 is the same as in the first and second embodiments.
  • the thickness of the winding portion 281 is configured to increase toward the inner diameter side. That is, the winding surface 281a in the axial direction of the winding portion 281 forms a winding surface inclination angle ⁇ t set in advance with respect to the plane T orthogonal to the axial direction.
  • the inner wall 182 is inclined in the outer diameter direction by the inner inclination angle ⁇ i and the outer wall 83 is inclined in the outer diameter direction before the winding. Since it is inclined by the angle ⁇ o , it is possible to avoid contact between the inner wall portion 182 and the outer wall portion 83 and a conducting wire wound in the vicinity thereof. Further, since the insulator 280 is configured such that the inner wall inner diameter inclination amount Di is not less than the distance D min between the rotor 61 and the inner inner lower edge portion 182a, contact between the rotor 61 and the inner wall portion 182 is also avoided. can do.
  • the winding surface 281a in the axial direction of the winding portion 281 forms a winding surface inclination angle ⁇ t with respect to the plane T perpendicular to the axial direction.
  • the winding surface 281a can be configured to be parallel to a plane T perpendicular to the axial direction. That is, the winding portion 281 tilts following the contraction of the core 71 during winding, so that the winding surface tilt angle ⁇ t is canceled after winding, and the winding surface 281a is parallel to the plane T. It becomes.
  • the amount of tightening during winding is stable when the first layer of the coil 72 is wound, and hardly changes when winding the second and subsequent layers. That is, when the first layer is wound, the winding surface 281a is almost parallel to the plane T. Therefore, according to the rotary electric motor of the third embodiment, the second and subsequent layers can be wound while the winding surface 281a is substantially parallel to the plane T. It is possible to prevent the force from being generated in the radial direction, and it is possible to prevent a situation in which the winding slips and collapses.
  • the rotary electric motor and the compressor in the third embodiment it is possible to achieve more accurate aligned winding, and thus it is possible to improve motor efficiency. Further, since the conducting wire does not contact the inner wall portion 182 and the outer wall portion 83, productivity can be improved by increasing the winding speed. And since the manufacture deterioration of the insulating film of a conducting wire can be suppressed and the contact with the rotor 61 can also be avoided, the improvement of reliability can be aimed at. It should be noted that the thickness of the core 71 made of laminated steel sheets is not necessarily contracted by all the interlaminar gaps ⁇ after winding, and it is also assumed that the outer diameter side of the core 71 contracts. Therefore, the winding surface inclination angle ⁇ t may be set to be smaller than the reference inclination angle ⁇ MAX by a preset constant angle.
  • FIGS. 10 and 11 are longitudinal sectional views schematically showing the state before and after the winding in the structure of the stator included in the compressor according to the fourth embodiment.
  • the rotating electric motor according to the fourth embodiment is characterized in that it is configured so as to satisfy the requirement of the aligned winding that the collision width between the insulator and the conducting wire at the time of winding is not more than half the wire diameter of the conducting wire.
  • the same components as those in the first to third embodiments are denoted by the same reference numerals and the description thereof is omitted.
  • the insulator 380 of the fourth embodiment is provided on the winding portion 381 around which the conducting wire is wound, the inner wall portion 82 provided on the inner diameter side of the winding portion 381, and the outer diameter side of the winding portion 381. And an outer wall portion 383 that is inclined by a preset outer inclination angle ⁇ o with respect to the plane S orthogonal to the radial direction.
  • the inner surface of the outer wall 83 has an outer inner lower edge 383a located on the core 71 side and an outer inner tip 383b located at the tip.
  • the core 71 after the winding is reduced in thickness as it goes to the inner diameter side due to the influence of the tightening tension during winding, and forms an inclination angle ⁇ with respect to the plane T perpendicular to the axial direction.
  • the outer inclination angle ⁇ o is less than a reference inclination angle ⁇ MAX ( ⁇ o ⁇ MAX ) calculated based on the thickness and number of stacked cores 71 and the outer diameter and inner diameter of the stator, and the winding
  • the outer wall inner diameter inclination amount Do which is the radial distance between the outer inner lower edge 383a and the outer inner tip 383b of the rear outer wall 383, is set to be equal to or less than the radius of the conducting wire.
  • the outer wall inner diameter inclination amount Do can be expressed as Lo ⁇ sin ( ⁇ o). That is, in the fourth embodiment, when the radius of the conducting wire is ⁇ m / 2, the outer inclination angle ⁇ o is set so that the relationship “Lo ⁇ sin ( ⁇ o) ⁇ ⁇ m / 2” is established. Thus, the outer wall inner diameter inclination amount Do can be made equal to or smaller than the radius of the conducting wire.
  • the collision width between the insulator and the winding at the time of winding can be suppressed to half or less of the wire diameter of the conducting wire, it is possible to improve the winding performance and ensure the reliability of the insulating coating of the conducting wire. it can.
  • FIGS. 12 and 13 are longitudinal sectional views schematically showing a state before winding and a state after winding in the structure of the stator included in the compressor according to the fifth embodiment.
  • the same components as those in the first to fourth embodiments are denoted by the same reference numerals and the description thereof is omitted.
  • the insulator 480 of the fifth embodiment is provided on the inner diameter side of the winding portion 481 and the winding portion 381 around which the conducting wire is wound, and is set in advance to the outer diameter side with respect to the axial direction before the winding. It has an inner wall portion 482 inclined by an inner inclination angle ⁇ i and an outer wall portion 83 provided on the outer diameter side of the winding portion 481.
  • the outer surface of the inner wall 482 has an inner / outer lower edge 482a located on the core 71 side and an inner / outer tip 482b located at the tip.
  • the core 71 after the winding is reduced in thickness as it goes to the inner diameter side due to the influence of the tightening tension during winding, and forms an inclination angle ⁇ with respect to the plane T perpendicular to the axial direction.
  • the inner inclination angle ⁇ i is larger than the reference inclination angle ⁇ MAX calculated based on the thickness and number of stacked cores 71 and the outer diameter and inner diameter of the stator ( ⁇ i > ⁇ MAX ), and
  • the inner wall outer diameter inclination amount Dio which is the radial distance between the inner and outer lower edge portions 482a and the inner and outer tip portions 482b of the inner wall portion 482 after winding, is set to be equal to or less than the radius of the conducting wire.
  • the inner wall outer diameter tilt Dio when the height of the side surface of the outer diameter side of the inner wall portion 482 (contact surface with the coil 72) and L i, the inner wall outer diameter tilt Dio, be expressed as L i ⁇ sin ( ⁇ i - ⁇ ) Can do. That is, in the fifth embodiment, the inner wall outer diameter inclination amount Dio is set by setting the inner inclination angle ⁇ i so that the relationship of “L i ⁇ sin ( ⁇ i ⁇ ) ⁇ ⁇ m / 2” is established. It can be made below the radius of a conducting wire.
  • the collision width between the insulator and the winding at the time of winding can be suppressed to half or less of the wire diameter of the conducting wire, it is possible to improve the winding performance and ensure the reliability of the insulating coating of the conducting wire. it can.
  • FIGS. 14 and 15 are longitudinal sectional views schematically showing the state before and after the winding in the structure of the stator included in the conventional compressor, respectively.
  • FIG. 16 is a longitudinal sectional view for explaining a problem related to the inner wall portion and the outer wall portion of the rotor of FIG. 15.
  • FIG. 17 is a longitudinal sectional view for explaining a problem related to the winding portion of the rotor of FIG.
  • the core 71 made of laminated steel plates is configured by laminating a plurality of electromagnetic steel plates, a slight interlaminar gap ⁇ is generated between the electromagnetic steel plates.
  • the tension applied to the conducting wire acts as an external force that compresses the core 71 in the axial direction, so that the interlaminate gap ⁇ is narrowed, and the core 71 contracts with the total gap amount of the core 71 as the upper limit. This contraction is the tightening.
  • the tightening is characterized in that the amount of tightening is stable when the first layer is wound, and the second and subsequent layers are not substantially changed.
  • the outer wall portion 983 of the insulator 980 be parallel to the rotation track R during winding. Therefore, conventionally, as shown in FIG. 14, the insulator 980 is formed so that the outer wall portion 983 is parallel to the rotation track R in a state before winding. However, in the winding step, winding tightening occurs as described above, and the contraction amount of the core 71 is larger on the inner diameter side than on the outer diameter side. For this reason, the attitude
  • the conducting wire 72a constituting the coil 72 passes in the vicinity of the outer wall portion 983 in the winding (see FIG. 16), the conducting wire 72a collides with the insulator 980 at high speed. Cannot be controlled, and aligned winding cannot be performed. Moreover, since the insulation film of the conducting wire 72a is damaged by the collision between the conducting wire 72a and the outer wall portion 983, there are problems in both productivity and reliability. Further, in the conventional configuration, the inner wall portion 982 protrudes beyond the inner diameter of the stator 70 and contacts the rotor 61. Further, as shown in FIG.
  • the plurality of insulators 80, 180, 280, 380, and 480 are set in advance on the outer diameter side with respect to the axial direction before winding. since it has only inclined outer wall outer inclination angle theta o, be inclined radially inward insulator 80,180,280,380, and 480 following the product thickness change of the core 71 by tightening, the outer wall Since 83 and 383 are inclined toward the outer diameter side by the outer inclination angle ⁇ o , it is possible to suppress the outer wall portion from being inclined toward the inner diameter side due to winding tightening, and the conductor 72 a constituting the coil 72 can be prevented. Damage and the like can be prevented.
  • each embodiment mentioned above is a suitable example in a rotary electric machine and a compressor, and the technical scope of the present invention is not limited to these modes.
  • the outer inclination angle ⁇ o and the inner inclination angle ⁇ i may be set with reference to a value obtained by adding or subtracting a threshold value (threshold value determined based on the shrinkage amount of the interlaminar gap ⁇ ).

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Compressor (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

Le moteur rotatif installé dans le compresseur comporte une broche, un rotor à travers lequel est insérée la broche, et un stator qui est disposé de manière annulaire sur le côté périphérique extérieur du rotor. Le stator a un noyau qui est formé par stratification de multiples plaques d'acier électromagnétique, des isolants qui sont respectivement disposés sur une extrémité et l'autre extrémité dans la direction axiale du noyau, et une bobine qui est formée par enroulement d'un fil conducteur entre l'isolant sur ladite extrémité et l'isolant sur ladite autre extrémité par l'intermédiaire du noyau. Chacun des isolants présente une partie d'enroulement autour de laquelle le fil conducteur est radialement enroulé et une partie de paroi extérieure qui est disposée sur le côté de diamètre externe de la partie d'enroulement, la surface intérieure de celui-ci étant inclinée vers le côté de diamètre externe suivant un angle d'inclinaison prédéfini par rapport à la direction axiale dans un état de pré-enroulement.
PCT/JP2015/062981 2015-04-30 2015-04-30 Moteur rotatif et compresseur WO2016174768A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB1716742.0A GB2553463B (en) 2015-04-30 2015-04-30 Rotary electric motor and compressor
CN201580078919.5A CN107534342B (zh) 2015-04-30 2015-04-30 旋转电动机以及压缩机
PCT/JP2015/062981 WO2016174768A1 (fr) 2015-04-30 2015-04-30 Moteur rotatif et compresseur
JP2017515349A JP6362771B2 (ja) 2015-04-30 2015-04-30 回転電動機及び圧縮機

Applications Claiming Priority (1)

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PCT/JP2015/062981 WO2016174768A1 (fr) 2015-04-30 2015-04-30 Moteur rotatif et compresseur

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WO2016174768A1 true WO2016174768A1 (fr) 2016-11-03

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WO2019058644A1 (fr) * 2017-09-20 2019-03-28 パナソニックＩｐマネジメント株式会社 Matériau isolant, et stator et moteur le comprenant

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EP0871282A1 (fr) * 1997-04-11 1998-10-14 Kabushiki Kaisha Toshiba Stator pour machines électrodynamiques et méthode pour réaliser celui-ci
JP2003319593A (ja) * 2002-04-25 2003-11-07 Aichi Elec Co 電動機の固定子
JP2003333788A (ja) * 2002-05-13 2003-11-21 Mitsubishi Heavy Ind Ltd 電動機のステータ
WO2013166372A1 (fr) * 2012-05-04 2013-11-07 Comprehensive Power, Inc. Dispositif et procédé pour refroidir un dispositif électrique ayant des stators modulaires
WO2015005290A1 (fr) * 2013-07-12 2015-01-15 旭硝子株式会社 Milieu actif pour cycle thermodynamique, composition pour système à cycle thermodynamique et système à cycle thermodynamique
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JPWO2019058644A1 (ja) * 2017-09-20 2020-09-10 パナソニックＩｐマネジメント株式会社 インシュレータ及びそれを備えたステータ、モータ

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JP6362771B2 (ja) 2018-07-25
JPWO2016174768A1 (ja) 2017-11-30
GB2553463A (en) 2018-03-07
CN107534342A (zh) 2018-01-02
GB2553463B (en) 2021-07-28
GB201716742D0 (en) 2017-11-29
CN107534342B (zh) 2019-07-12

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