WO2021033290A1 - Rotating electric machine stator - Google Patents

Rotating electric machine stator Download PDF

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Publication number
WO2021033290A1
WO2021033290A1 PCT/JP2019/032626 JP2019032626W WO2021033290A1 WO 2021033290 A1 WO2021033290 A1 WO 2021033290A1 JP 2019032626 W JP2019032626 W JP 2019032626W WO 2021033290 A1 WO2021033290 A1 WO 2021033290A1
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WO
WIPO (PCT)
Prior art keywords
stator
stator winding
phase
coil
coils
Prior art date
Application number
PCT/JP2019/032626
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French (fr)
Japanese (ja)
Inventor
晃生 関口
浩二 矢部
Original Assignee
三菱電機株式会社
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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 PCT/JP2019/032626 priority Critical patent/WO2021033290A1/en
Publication of WO2021033290A1 publication Critical patent/WO2021033290A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots

Definitions

  • the present invention relates to a stator of a rotary electric machine in which a plurality of stator windings are arranged in a slot portion.
  • the stator of the rotary electric machine has a fixed iron core and a stator winding wound around the fixed iron core.
  • the fixed iron core has a cylindrical core back portion and a plurality of teeth portions that protrude from the core back portion toward the inner peripheral side in the radial direction and are formed in the axial direction of the core back portion.
  • a slot portion is formed between the core back portion and the adjacent teeth portion.
  • the stator winding is wound around a slot portion separated by a predetermined number of slots through the slot portion.
  • the coil end portion of the coil of the stator winding is composed of a distribution winding extending in the circumferential direction from both ends of the slot portion.
  • the place where one stator winding on the inner peripheral side and one stator winding on the outer peripheral side are arranged in the slot portion is unbalanced. Further, the positions where the coil of one stator winding on the inner peripheral side and the coil of one stator winding on the outer peripheral side are arranged in the slot portion are different.
  • the inductance of the coil of one stator winding on the inner peripheral side and the inductance of the coil of one stator winding on the outer peripheral side are different.
  • the coil of one stator winding on the inner peripheral side and the coil of one stator winding on the outer peripheral side are connected in parallel, current imbalance occurs due to the influence of different inductances, resulting in winding loss. growing. Therefore, there are problems that the efficiency of the rotary electric machine is deteriorated and the temperature of the winding is increased.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a stator of a rotary electric machine capable of preventing deterioration of efficiency of the rotary electric machine and increase in temperature of windings.
  • the cylindrical core back portion and the core back portion projecting from the core back portion to the radial inner peripheral side of the core back portion and formed in the axial direction of the core back portion.
  • a stator core having a plurality of teeth portions and having a slot portion formed between the core back portion and the adjacent teeth portions, and a coil portion that passes through the slot portion and is separated by a predetermined number of slots.
  • the number of coils of the stator winding of each phase is s / 3, and two coils of the stator winding of the same phase are inserted into one of the slot portions, and the coils of the two in-phase stator windings are inserted.
  • the plurality of first coils of one stator winding are located on the outer peripheral side of the stator core with respect to the plurality of second coils of the other stator winding in the one slot portion.
  • the number of the plurality of first coils is the same as the number of the plurality of second coils, and the plurality of first coils and the plurality of second coils are connected in series, respectively, and the series Each of the first coil and the second coil connected to the above is connected in parallel with each other.
  • the number of the plurality of first coils of one stator winding on the outer peripheral side is the number of the plurality of first coils of the other stator winding on the inner peripheral side.
  • the number of the two coils is the same, the plurality of first coils and the plurality of second coils are connected in series, and the first coil and the second coil connected in series are connected in parallel with each other. To. Therefore, it is possible to prevent the efficiency of the rotary electric machine from deteriorating and the temperature of the stator winding from rising.
  • the inductance will be unbalanced, so when the current during operation of the electric motor is diverted to the coils connected in parallel, the inductance will increase. The smaller the current, the larger the current, and the current diversion becomes unbalanced, resulting in increased coil loss.
  • the number of coils connected in parallel with each other is the same, so that the current during operation of the rotary electric machine is divided into the coils connected in parallel. It can be split evenly.
  • the coil loss can be reduced and a highly efficient rotary electric machine can be provided. Further, since the loss of the coil can be reduced, the temperature rise of the coil can also be reduced.
  • FIG. 5 is a view of the arrangement configuration of the coil of the A-phase stator winding of the stator of the stator of the rotary electric machine according to the first embodiment as viewed from the axial direction of the stator core. It is a figure which shows the wiring structure of the coil of the stator winding of A phase of the stator of the rotary electric machine which concerns on Embodiment 1.
  • FIG. It is a figure which looked at the winding direction of the coil of the stator winding of each phase of the stator of the rotary electric machine which concerns on Embodiment 2 from the axial direction of the stator core.
  • stator of the rotary electric machine will be described with reference to the drawings.
  • the same components will be described with the same reference numerals, and duplicate explanations will be given only when necessary.
  • FIG. 1 is a diagram schematically showing a sealed compressor provided with a stator of a rotary electric machine according to the first embodiment.
  • the sealed compressor provided with the rotary electric machine according to the first embodiment includes a closed container 1 having an oil storage portion 1a for storing lubricating oil at the bottom.
  • a rotary electric machine having a rotor 2 of a rotary electric machine having a magnet attached to a laminated electromagnetic steel plate and a stator 3 having a stator winding applied to the laminated electromagnetic steel plate is arranged above the compression mechanism portion 20. Has been done.
  • the closed container 1 is composed of a cylindrical central container 41 and an upper container 43 and a lower container 45 that are fitted in the upper and lower openings of the central container 41 in a closed state.
  • a suction pipe 44 is connected to the central container 41, and a discharge pipe 42 is connected to the upper container 43.
  • the suction pipe 44 is a connecting pipe for sending the inflowing gas refrigerant (low temperature and low pressure) into the compression mechanism unit 20.
  • the discharge pipe 42 is a connecting pipe for allowing the refrigerant in the closed container 1 compressed by the compression mechanism unit 20 to flow into the refrigerant pipe.
  • the compression mechanism unit 20 has a rotating shaft 21, a main bearing 22, an auxiliary bearing 23, a rolling piston 24, a cylindrical cylinder 25, and a vane (not shown here).
  • the rotary shaft 21 is fixed to the rotor 2 of the rotary electric machine, and is held by the main bearing 22 and the sub bearing 23.
  • the rolling piston 24 is fixed to the rotating shaft 21 and is eccentrically and rotatably housed in the cylindrical cylinder 25.
  • the cylindrical cylinder 25 is separated into each compression chamber by a vane, moves in the compression chamber, and discharges the high-pressure refrigerant into the space inside the closed container 1.
  • the refrigerant discharged into the space inside the closed container 1 passes through the gap portion of the rotary electric machine and is discharged to the outside from the discharge pipe 42 arranged in the upper container 43. At this time, the lubricating oil is also wound up in the upper container 43 together with the refrigerant, and is partially taken out from the discharge pipe 42 to the outside.
  • FIG. 2 is a view of the stator 3 of the rotary electric machine according to the first embodiment as viewed from the direction of the rotation axis.
  • the stator 3 of the rotary electric machine has a stator core 4.
  • the stator core 4 is manufactured by laminating a plurality of electromagnetic steel sheets in the axial direction, and includes a cylindrical core back portion 4a and a plurality of teeth portions 4b protruding radially inward from the core back portion 4a. There is.
  • the core back portion 4a and the teeth portion 4b form 18 slot portions sp between the teeth portions 4b.
  • the coil of the stator winding 10 is inserted into the slot portion sp.
  • a copper wire having a circular cross section and low resistance is used for the stator winding 10.
  • the stator winding 10 is wound around the teeth portion 4b of the stator core 4 every 3 slot portions sp. Specifically, the stator winding 10 is wound around the teeth portion 4b in a circular shape when viewed from the cross-sectional direction orthogonal to the axial direction of the stator core 4. More specifically, the A-phase stator winding 11 is wound around the outermost peripheral side of the stator core 4. A B-phase stator winding 12 adjacent to the A-phase stator winding 11 is wound around the inner peripheral side of the A-phase stator winding 11. On the innermost peripheral side of the B-phase stator winding 12, the stator winding 13 of C adjacent to the B-phase stator winding 12 is wound.
  • two A-phase coils of the A-phase stator winding 11 are arranged in every three slot portions in one slot portion sp.
  • two B-phase coils of the B-phase stator winding 12 are arranged in every three slot portions.
  • two C-phase coils of the C-phase stator winding 13 are arranged in every three slot portions. The position of the slot portion sp in which the two coils are arranged is different for each phase.
  • the coil end of the A-phase stator winding 11 is a stator core more than the coil end of the B-phase stator winding 12 and the coil end of the C-phase stator winding 13. It is placed on the outer peripheral side of.
  • the coil end of the B-phase stator winding 12 is arranged between the coil end of the A-phase stator winding 11 and the coil end of the C-phase stator winding, and is a C-phase stator.
  • the coil end of the winding 13 is arranged on the inner peripheral side of the stator core 4 with respect to the coil end of the B-phase stator winding 12.
  • FIG. 3 is a view of the arrangement configuration of the coils 11a to 11f of the A-phase stator winding 11 of the stator 3 of the rotary electric machine according to the first embodiment as viewed from the axial direction of the stator core 4.
  • the arrangement configuration of the A-phase stator winding 11 will be described here, the coil of the B-phase stator winding 12 and the coil of the C-phase stator winding 14 are also connected to the slot portion sp. Only the arrangement position is different, and the same arrangement configuration as the coils 11a to 11f of the A-phase stator winding 11 is adopted.
  • the coils 11a, 11c and 11e of the A-phase stator winding 11 are arranged on the outer peripheral side of the slot portion sp. Further, the coils 11b, 11d and 11f of the A-phase stator winding 11 are arranged on the inner peripheral side of the slot portion sp.
  • one coil end of the stator winding 11 arranged in one slot portion sp extends in one of the circumferential directions of the core back portion 4a, and the other coil end extends in the above-mentioned direction. Extends in the opposite circumferential direction.
  • FIG. 4 is a diagram showing a wiring configuration of coils 11a to 11f of the A-phase stator winding 11 of the stator 3 of the rotary electric machine according to the first embodiment.
  • the number of coils 11a, 11c and 11e arranged on the outer peripheral side is the same as the number of coils 11b, 11d and 11f arranged on the inner peripheral side.
  • the coil 11a and the coil 11b are connected in series.
  • the coil 11c and the coil 11d are connected in series.
  • the coil 11e and the coil 11f are connected in series.
  • the coils 11a and 11b connected in series, the coils 11c and 11d connected in series, and the coils 11e and 11f connected in series are connected in parallel with each other.
  • the coils 11a, 11c and 11e are also referred to as the first coil, and the coils 11b, 11d and 11f are also referred to as the second coil.
  • the first coil (coils 11a, 11c and 11e) of the coils connected in parallel is arranged outside the slot portion sp, and the second coil (coils 11b, 11d and 11f) is arranged inside the slot portion sp.
  • the inductance differs between the 1 coil and the 2nd coil. If coils with different inductances are connected in parallel, the inductance becomes unbalanced. Therefore, when the current during operation of the electric motor is shunted to the coils connected in parallel, the smaller the inductance, the larger the current, and the current. The diversion of the coil becomes unbalanced and the coil loss increases.
  • the number of the first coil and the second coil connected in parallel to each other is the same, so that the current during the operation of the rotary electric machine is connected in parallel. Since the inductances of the above are the same, the current can be evenly divided when the current is divided.
  • the coil loss can be reduced and a highly efficient rotary electric machine can be provided. Further, since the loss of the coil can be reduced, the temperature rise of the coil can also be reduced.
  • the in-phase coils connected in series need to be electrically joined, they need to be joined with a conductive material.
  • the longer the conductive material the higher the cost, so a shorter one is preferable.
  • adjacent coils having the same phase are connected in series.
  • the conductive material for joining the coils connected in series can be shortened, and the cost can be suppressed.
  • the coils are adjacent to each other, the workability of wiring is good. If it is to be joined to a place where the coils are not adjacent to each other, it is necessary to join the coils across the adjacent coils, which makes it difficult to handle the conductive material to be joined.
  • the coils are adjacent to each other, it is easy to wind the coils continuously without cutting between the coils, and it is possible to reduce the processing, joining material, and insulating material of the joint when connecting, which reduces the cost. It can be reduced.
  • FIG. 5 is a view of the coil winding direction of the stator windings 11 to 13 of each phase of the stator 3 of the rotary electric machine according to the second embodiment as viewed from the axial direction of the stator core 4.
  • the coil 11a of the A-phase stator winding 11 is wound clockwise when viewed from the center of the stator 3, and the coil 11b of the next adjacent stator winding 11 is counterclockwise. It is wound around.
  • the coils 11a of the A-phase stator winding 11 are arranged clockwise, and the coils 11b are arranged counterclockwise alternately.
  • the arrangement of the coil ends of the coils of the A-phase stator winding 11 is configured to be out of phase in the circumferential direction.
  • the clockwise and counterclockwise directions when viewed from the center of the stator here indicate that the coils of the adjacent stator windings are wound in opposite directions, and the winding direction of the windings of each phase is that of the motor.
  • the winding direction may be any shape as long as the winding direction that can form the stator is wound.
  • the coil 12a of the B-phase stator winding 12 is also wound clockwise when viewed from the center of the stator 3, and the coil 12b of the next adjacent stator winding 12 is counterclockwise. It is wound.
  • the coil 12a of the B-phase stator winding 12 is arranged clockwise, and the coil 12b is arranged counterclockwise alternately.
  • the arrangement of the coil ends of the coils of the B-phase stator winding 12 is configured to be out of phase in the circumferential direction.
  • the coil 13a of the C-phase stator winding 13 is also wound clockwise when viewed from the center of the stator 3, and the coil 13b of the next adjacent stator winding 13 is turned counterclockwise. It is wound.
  • the coil 13a of the C-phase stator winding 13 is arranged clockwise, and the coil 13b is arranged counterclockwise alternately.
  • the arrangement of the coil ends of the coils of the C-phase stator winding 13 is configured to be out of phase in the circumferential direction.
  • the coil is inserted into the slot portion sp and arranged for each phase.
  • the coil ends can be inserted without overlapping, so that the insertion force at the time of insertion can be reduced.
  • the stator of the rotary electric machine of the second embodiment since the coil end extends over almost the entire circumference, it is particularly necessary to insert it for each phase.
  • the coils are inserted in the order of A phase, B phase, and C phase, the coil end of A phase exists on the outer peripheral side of the stator rather than the B phase and C phase, and the coil end of B phase is of A phase and C phase. It will exist in between.
  • the arrangement of the coil ends is well-balanced, and the circumference of the coil ends can be shortened. Therefore, the cost can be reduced, and the insertion force when arranging the coil in the slot can also be reduced. Further, since each phase is separated from the outer phase, the middle phase, and the inner phase, it becomes easy to distinguish each phase, and workability can be improved.
  • Embodiment 3. 3-1 Configuration In the stator 3 of the rotary electric machine of the second embodiment, since the coil 11a and the coil 11b of the stator winding 11 of one phase, for example, the A phase are alternately wound, the coil 11a and the coil 11b are wound. It takes time to switch the rotation.
  • the stator winding 10 of each phase is wound by skipping one coil of the stator winding 10 of the phase.
  • the coil 11a of the A-phase stator winding 11 is wound by skipping the coil 11b of the A-phase stator winding 11.
  • the coil 12a of the B-phase stator winding 12 is wound by skipping the coil 12b of the B-phase stator winding 12.
  • the coil 13a of the C-phase stator winding 13 is wound by skipping the coil 13b of the C-phase stator winding 13.
  • the coil of the stator winding 10 is wound in the same direction, and the coil of the stator winding 10 can be wound smoothly. Further, since the stator winding 10 is continuously wound, the work of cutting the stator winding 10 becomes unnecessary, and the time for cutting the stator winding 10 can be shortened.
  • the second coil of the A-phase stator winding 11 is continuously wound while the second coil of the A-phase stator winding 11 is slotted. Fit it into the winding insertion tool of the part sp.
  • the first coil of the A-phase stator winding 11 is continuously wound and fitted into the winding insertion jig or the like of the slot.
  • the second coil enters the insertion jig first, and then the first coil enters the winding insertion jig of the slot.
  • the order in which the coils are inserted into the slot portion sp is the second coil after the first coil. Therefore, the first coil is naturally arranged on the outer peripheral side of the stator of the slot portion sp, and the second coil is arranged on the inner peripheral side of the stator of the slot. As a result, the coils of the stator windings 10 having the same phase can be arranged on the outer peripheral side and the inner peripheral side.
  • the A-phase stator winding 11 is located outside the stator core 4 in the radial direction, and the B-phase stator winding 12 is located in the middle.
  • a C-phase stator winding 13 is arranged inside and inside. Since the stator winding 11 of the A phase on the outer side in the radial direction is on the outer side in the radial direction as compared with the other phases, it is necessary to increase the peripheral length of the coil end.
  • the coil of the stator winding 10 when the coil of the stator winding 10 is inserted into the slot portion sp, the coil of the outermost A-phase stator winding in the radial direction is inserted, and then the coil of the intermediate B-phase stator winding is inserted. Insert the coil of the stator winding into the slot portion sp in the order of the coil and finally the coil of the C-phase stator winding that exists on the innermost side in the radial direction.
  • the coil of the A-phase stator winding 11 needs to be released to the outside in the radial direction because the coil end portion interferes when the coil of the B-phase stator winding 12 is inserted. Further, since the coil of the C-phase stator winding 13 is inserted after the coil of the B-phase stator winding 12 is inserted, the coil end is prevented from interfering with the coil end portion of the B-phase stator winding 12. It is necessary to let the portion escape outward in the radial direction, and the peripheral length of the coil end portion needs to be longer than the peripheral length of the coil end portion of the C-phase stator winding 13.
  • the coil resistance of each phase has the same voltage drop due to the coil resistance, in order to match the resistance, for example, in FIG. 2, the outermost phase, which is the A phase and has the longest peripheral length, is fixed. It is common to perform winding by matching the circumference of the coil of the child winding 10 with the circumference of the coil. Therefore, for example, the fixed child winding of the inner peripheral side phase, which is the C phase in FIG. The coil peripheral length of the wire 10 becomes long, which increases the cost.
  • the circumference of the coil of the C-phase stator winding 13 is changed to the circumference of the coil of the A-phase stator winding 11 and the B-phase stator. Make it shorter than the circumference of the coil of winding 12. Then, the coil resistance is reduced by the amount of shortening the circumference of the coil of the C-phase stator winding 13, and the wire diameter of the coil of the C-phase stator winding 13 is reduced. Similarly, the circumference of the coil of the B-phase stator winding 12 is made shorter than the circumference of the coil of the A-phase stator winding 11. Then, the coil resistance is reduced by the amount of shortening the circumference of the coil of the B-phase stator winding 12, and the wire diameter of the coil of the B-phase stator winding 12 is reduced.
  • the coil resistance of the coil of the A-phase stator winding 11 and the coil of the B-phase stator winding 12 and the coil of the C-phase stator winding 13 can be made the same, and the B-phase and C can be made the same.
  • the coil weight of the phase can be reduced.
  • the coil circumference is Phase A> Phase B> Phase C
  • the wire diameter of the coil is also A phase> B phase> C phase.
  • the wire diameter of the coil the relationship with the total cross-sectional area of the coil is obtained, and the wire diameter can be similarly expressed as the total cross-sectional area of the coil.
  • the cross-sectional area of the coil of the stator winding of the innermost phase is smaller than the cross-sectional area of the stator winding of the outermost phase of the stator core.
  • the stator winding may be an aluminum winding.
  • stator 3 of the rotary electric machine of the third embodiment when a current is applied to the stator winding, the force applied to the coil end can be reduced. Therefore, the stator winding is fixed by using an aluminum wire. Even in the child, since the coil end becomes difficult to move, damage to the stator winding can be reduced, and the quality of the stator winding can be improved.
  • the force applied to the coil end can be reduced, so that the winding quality deteriorates in the rotary electric machine in which the magnet of the rotor 2 is magnetized by the stator 3. It is possible to realize a rotary electric machine that can suppress the above.
  • stator winding 10 is an aluminum wire
  • stator winding 10 is soft, so in the case of the method of magnetizing the rotor magnet by the stator 3, the damage to the coil end becomes large and the stator winding The deformation of 10 also becomes large.
  • the rare earth magnet when a rare earth magnet is used as the rotor magnet, the rare earth magnet has a stronger magnetic force than the ferrite magnet, but it is difficult to magnetize. Therefore, in the case of the method of magnetizing the rare earth magnet of the rotor by the stator 3 in the rotary electric machine, a larger current is required, so that the damage to the winding of the coil end becomes large. According to the stator 3 of the rotary electric machine of the third embodiment, the force applied to the coil end when energized can be reduced, so that a large current can be supplied.
  • the stator 3 of the rotary electric machine of the third embodiment since the force applied to the coil end when energized can be reduced, the stator is arranged on the rotor in order to assemble it accurately when used in a compressor. After assembling the compressor without magnetizing the magnet, it is possible to reduce the force applied to the coil end when magnetizing the magnet with the stator. Therefore, damage to the coil can be reduced, deterioration of the quality of the coil can be suppressed, and a high-quality compressor can be provided.
  • the embodiment is presented as an example and is not intended to limit the scope of the embodiment.
  • the embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the embodiment. These embodiments and variations thereof are included in the scope and gist of the embodiments.
  • stator winding 11 A phase stator winding, 11a-11fA Phase stator winding coil, 12B phase stator winding, 12a, 12b B phase stator winding coil, 13C phase stator winding, 13a, 13b C phase stator winding Coil, 20 compression mechanism, 21 rotating shaft, 22 main bearing, 23 auxiliary bearing, 24 rolling piston, 25 cylindrical cylinder, 41 central container, 42 discharge pipe, 43 upper container, 44 suction pipe, 45 lower container, sp slot Department.

Abstract

The rotating electric machine stator according to the present invention is provided with: a stator core having a cylindrical core back portion and a plurality of tooth portions and formed with slot portions between the core back portion and the tooth portions adjacent to each other, said tooth portions projecting from the core back portion to the inner circumferential side of the core back portion in the radial direction and being formed in the axial direction of the core back portion; and a stator winding passing the slot portions and wound in the slot portion separated by a predetermined number of the slot portions. The number of poles p and the number of slots s satisfy s = 3p. The stator winding has a three-phase stator winding. The number of stator winding coils of each phase is s/3. Two stator winding coils of the same phase are inserted into one slot portion. A plurality of first coils of one of the two stator winding coils of the same phase are respectively disposed on the outer circumferential side of the stator core with respect to a plurality of second coils of the other of the two stator winding coils of the same phase in the one slot portion. The number of the plurality of first coils is equal to the number of the plurality of second coils. The plurality of first coils and the plurality of second coils are each connected in series. The first coils and the second coils each connected in series are connected in parallel with each other.

Description

回転電機の固定子Rotating machine stator
　本発明は、スロット部に複数の固定子巻線が配置される回転電機の固定子に関する。 The present invention relates to a stator of a rotary electric machine in which a plurality of stator windings are arranged in a slot portion.
　回転電機の固定子は、固定鉄心と、この固定鉄心に巻装された固定子巻線とを有する。固定鉄心は、円筒状のコアバック部と、コアバック部からその径方向内周側に突出し、コアバック部の軸方向に形成された複数のティース部とを有する。コアバック部と隣り合うティース部との間にはスロット部が形成される。固定子巻線は、スロット部を通り所定スロット部数離れたスロット部に巻回される。固定子巻線のコイルのコイルエンド部は、スロット部の両端部から周方向に延びる振り分け巻線により構成されている。 The stator of the rotary electric machine has a fixed iron core and a stator winding wound around the fixed iron core. The fixed iron core has a cylindrical core back portion and a plurality of teeth portions that protrude from the core back portion toward the inner peripheral side in the radial direction and are formed in the axial direction of the core back portion. A slot portion is formed between the core back portion and the adjacent teeth portion. The stator winding is wound around a slot portion separated by a predetermined number of slots through the slot portion. The coil end portion of the coil of the stator winding is composed of a distribution winding extending in the circumferential direction from both ends of the slot portion.
国際公開第２００４／０６２０６５号International Publication No. 2004/062065
　しかしながら、従来の回転電機の固定子では、内周側の１つの固定子巻線及び外周側の１つの固定子巻線がスロット部内に配置される箇所がアンバランスとなっている。また、内周側の１つの固定子巻線のコイル及び外周側の１つの固定子巻線のコイルをスロット部内で配置される位置が異なる。 However, in the stator of a conventional rotary electric machine, the place where one stator winding on the inner peripheral side and one stator winding on the outer peripheral side are arranged in the slot portion is unbalanced. Further, the positions where the coil of one stator winding on the inner peripheral side and the coil of one stator winding on the outer peripheral side are arranged in the slot portion are different.
　従って、内周側の１つの固定子巻線のコイルのインダクタンス及び外周側の１つの固定子巻線のコイルのインダクタンスが異なる。内周側の１つの固定子巻線のコイルと外周側の１つの固定子巻線のコイルとを並列に接続する際、インダクタンスが異なる影響により電流のアンバランスが発生し、巻線の損失が大きくなる。そのため回転電機の効率の悪化及び巻線の温度の上昇が大きくなるという課題があった。 Therefore, the inductance of the coil of one stator winding on the inner peripheral side and the inductance of the coil of one stator winding on the outer peripheral side are different. When the coil of one stator winding on the inner peripheral side and the coil of one stator winding on the outer peripheral side are connected in parallel, current imbalance occurs due to the influence of different inductances, resulting in winding loss. growing. Therefore, there are problems that the efficiency of the rotary electric machine is deteriorated and the temperature of the winding is increased.
　本発明は、上記実情に鑑みてなされたものであり、回転電機の効率の悪化及び巻線の温度の上昇を防止することができる回転電機の固定子を提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a stator of a rotary electric machine capable of preventing deterioration of efficiency of the rotary electric machine and increase in temperature of windings.
　本発明に係る回転電機の固定子によれば、円筒状のコアバック部と、前記コアバック部から前記コアバック部の径方向内周側に突出し、前記コアバック部の軸方向に形成された複数のティース部とを有し、前記コアバック部と、隣り合う前記ティース部との間にスロット部が形成された固定子鉄心と、前記スロット部を通り所定スロット部数離れたスロット部に巻回される固定子巻線とを備えた回転電機の固定子において、極数ｐ及びスロット数ｓは、ｓ＝３ｐを満たし、前記固定子巻線は、三相の固定子巻線を有し、各相の固定子巻線のコイルの数はｓ／３個であり、１つの前記スロット部には、２つの同相の固定子巻線のコイルが挿入され、前記２つの同相の固定子巻線のコイルのうち、一方の固定子巻線の複数の第１コイルは、前記１つのスロット部において、前記他方の固定子巻線の複数の第２コイルよりも前記固定子鉄心の外周側にそれぞれ配置され、前記複数の第１コイルの数は、前記複数の第２コイルの数と同じであり、前記複数の第１コイルと前記複数の第２コイルとは、それぞれ直列に接続され、前記直列に接続された前記第１コイル及び前記第２コイルの各々は、互いに並列に接続される。 According to the stator of the rotary electric machine according to the present invention, the cylindrical core back portion and the core back portion projecting from the core back portion to the radial inner peripheral side of the core back portion and formed in the axial direction of the core back portion. A stator core having a plurality of teeth portions and having a slot portion formed between the core back portion and the adjacent teeth portions, and a coil portion that passes through the slot portion and is separated by a predetermined number of slots. In a rotary electric coil having a stator winding, the number of poles p and the number of slots s satisfy s = 3p, and the stator winding has a three-phase stator winding. The number of coils of the stator winding of each phase is s / 3, and two coils of the stator winding of the same phase are inserted into one of the slot portions, and the coils of the two in-phase stator windings are inserted. Among the coils of the above, the plurality of first coils of one stator winding are located on the outer peripheral side of the stator core with respect to the plurality of second coils of the other stator winding in the one slot portion. Arranged, the number of the plurality of first coils is the same as the number of the plurality of second coils, and the plurality of first coils and the plurality of second coils are connected in series, respectively, and the series Each of the first coil and the second coil connected to the above is connected in parallel with each other.
　本発明によれば、同相の２つの固定子巻線のうち、外周側の一方の固定子巻線の複数の第１コイルの数を、内周側の他方の固定子巻線の複数の第２コイルの数と同じにし、複数の第１コイルと複数の第２コイルとは、それぞれ直列に接続され、直列に接続された第１コイル及び前記第２コイルの各々は、互いに並列に接続される。このため、回転電機の効率の悪化及び固定子巻線の温度の上昇を防止することができる。 According to the present invention, of the two in-phase stator windings, the number of the plurality of first coils of one stator winding on the outer peripheral side is the number of the plurality of first coils of the other stator winding on the inner peripheral side. The number of the two coils is the same, the plurality of first coils and the plurality of second coils are connected in series, and the first coil and the second coil connected in series are connected in parallel with each other. To. Therefore, it is possible to prevent the efficiency of the rotary electric machine from deteriorating and the temperature of the stator winding from rising.
　並列に接続されたコイルの外側コイル及び内側のコイルの数が異なる場合、インダクタンスがアンバランスとなることから、電動機の運転時の電流が並列に接続されたコイルに分流される際に、インダクタンスが小さいほうに電流が多くながれ、電流の分流がアンバランスとなり、コイルの損失が増えてしまう。 If the number of outer coils and inner coils of the coils connected in parallel are different, the inductance will be unbalanced, so when the current during operation of the electric motor is diverted to the coils connected in parallel, the inductance will increase. The smaller the current, the larger the current, and the current diversion becomes unbalanced, resulting in increased coil loss.
　本発明の回転電機の固定子によれば、互いに並列に接続されたコイルの数が同じになるので、回転電機の運転時の電流が並列に接続されたコイルに分流される際に、電流を均等に分流することができる。 According to the stator of the rotary electric machine of the present invention, the number of coils connected in parallel with each other is the same, so that the current during operation of the rotary electric machine is divided into the coils connected in parallel. It can be split evenly.
　さらに、電流の分流のアンバランスを解消することができることから、コイルの損失を低減することができ、高効率な回転電機を提供することができる。また、コイルの損失が低減できることから、コイルの温度上昇も小さくすることができる。 Furthermore, since the imbalance of the current shunt can be eliminated, the coil loss can be reduced and a highly efficient rotary electric machine can be provided. Further, since the loss of the coil can be reduced, the temperature rise of the coil can also be reduced.
実施の形態１に係る回転電機の固定子を備えた密閉型圧縮機を概略的に示す図である。It is a figure which shows typically the closed type compressor provided with the stator of the rotary electric machine which concerns on Embodiment 1. FIG. 実施の形態１に係る回転電機の固定子を回転軸方向からみた図である。It is a figure which saw the stator of the rotary electric machine which concerns on Embodiment 1 from the direction of the rotation axis. 実施の形態１に係る回転電機の固定子のＡ相の固定子巻線のコイルの配置構成を固定子鉄心の軸方向から見た図である。FIG. 5 is a view of the arrangement configuration of the coil of the A-phase stator winding of the stator of the stator of the rotary electric machine according to the first embodiment as viewed from the axial direction of the stator core. 実施の形態１に係る回転電機の固定子のＡ相の固定子巻線のコイルの配線構成を示す図である。It is a figure which shows the wiring structure of the coil of the stator winding of A phase of the stator of the rotary electric machine which concerns on Embodiment 1. FIG. 実施の形態２に係る回転電機の固定子の各相の固定子巻線のコイルの巻き回し方向を固定子鉄心の軸方向から見た図である。It is a figure which looked at the winding direction of the coil of the stator winding of each phase of the stator of the rotary electric machine which concerns on Embodiment 2 from the axial direction of the stator core.
　以下、図面を参照して、実施の形態に係る回転電機の固定子について説明する。なお、図面において、同一の構成要素には同一符号を付して説明し、重複説明は必要な場合にのみ行なう。 Hereinafter, the stator of the rotary electric machine according to the embodiment will be described with reference to the drawings. In the drawings, the same components will be described with the same reference numerals, and duplicate explanations will be given only when necessary.
実施の形態１．
１－１．構成
　図１は、実施の形態１に係る回転電機の固定子を備えた密閉型圧縮機を概略的に示す図である。実施の形態１における回転電機を備えた密閉型圧縮機は、図１に示すように、底部に潤滑油を貯留する油貯留部１ａを有する密閉容器１を備えている。 Embodiment 1.
1-1. Configuration FIG. 1 is a diagram schematically showing a sealed compressor provided with a stator of a rotary electric machine according to the first embodiment. As shown in FIG. 1, the sealed compressor provided with the rotary electric machine according to the first embodiment includes a closed container 1 having an oil storage portion 1a for storing lubricating oil at the bottom.
　密閉容器１内は、積層した電磁鋼板に磁石を取り付けた回転電機の回転子２及び積層した電磁鋼板に固定子巻線を施した固定子３を有する回転電機が圧縮機構部２０の上部に配置されている。 Inside the closed container 1, a rotary electric machine having a rotor 2 of a rotary electric machine having a magnet attached to a laminated electromagnetic steel plate and a stator 3 having a stator winding applied to the laminated electromagnetic steel plate is arranged above the compression mechanism portion 20. Has been done.
　密閉容器１は、円筒形状の中央容器４１と、中央容器４１の上下の各開口内に密閉状態で嵌入された上容器４３及び下容器４５とで構成されている。中央容器４１には、吸入管４４が接続されており、上容器４３には、吐出管４２が接続されている。吸入管４４は、流入するガス冷媒（低温低圧）を圧縮機構部２０内に送り込むための接続管である。吐出管４２は、圧縮機構部２０によって圧縮された密閉容器１内の冷媒を冷媒配管に流入させるための接続管である。 The closed container 1 is composed of a cylindrical central container 41 and an upper container 43 and a lower container 45 that are fitted in the upper and lower openings of the central container 41 in a closed state. A suction pipe 44 is connected to the central container 41, and a discharge pipe 42 is connected to the upper container 43. The suction pipe 44 is a connecting pipe for sending the inflowing gas refrigerant (low temperature and low pressure) into the compression mechanism unit 20. The discharge pipe 42 is a connecting pipe for allowing the refrigerant in the closed container 1 compressed by the compression mechanism unit 20 to flow into the refrigerant pipe.
　圧縮機構部２０は、回転軸２１と、主軸受２２と、副軸受２３と、ローリングピストン２４と、円筒シリンダ２５と及びここでは図示されていないベーンとを有する。回転軸２１は、回転電機の回転子２に固定されており、主軸受２２と副軸受２３とにより保持されている。ローリングピストン２４は、回転軸２１に固定され、円筒シリンダ２５内に偏芯回転可能に収容されている。円筒シリンダ２５は、ベーンにより圧縮室毎に区切られており、圧縮室を移動し、高圧となった冷媒が密閉容器１内部の空間に吐出される。 The compression mechanism unit 20 has a rotating shaft 21, a main bearing 22, an auxiliary bearing 23, a rolling piston 24, a cylindrical cylinder 25, and a vane (not shown here). The rotary shaft 21 is fixed to the rotor 2 of the rotary electric machine, and is held by the main bearing 22 and the sub bearing 23. The rolling piston 24 is fixed to the rotating shaft 21 and is eccentrically and rotatably housed in the cylindrical cylinder 25. The cylindrical cylinder 25 is separated into each compression chamber by a vane, moves in the compression chamber, and discharges the high-pressure refrigerant into the space inside the closed container 1.
　密閉容器１内部の空間に吐出された冷媒は、回転電機の空隙部を通過して上容器４３へ配置された吐出管４２より外部へと吐出される。この際、冷媒と共に潤滑油も上容器４３へ巻き上げられ、吐出管４２より一部外部へと持ち出される。 The refrigerant discharged into the space inside the closed container 1 passes through the gap portion of the rotary electric machine and is discharged to the outside from the discharge pipe 42 arranged in the upper container 43. At this time, the lubricating oil is also wound up in the upper container 43 together with the refrigerant, and is partially taken out from the discharge pipe 42 to the outside.
　図２は、実施の形態１に係る回転電機の固定子３を回転軸方向からみた図である。実施の形態１では、固定子３は、スロット数ｓ＝１８、極数ｐ＝６の場合について示している。 FIG. 2 is a view of the stator 3 of the rotary electric machine according to the first embodiment as viewed from the direction of the rotation axis. In the first embodiment, the stator 3 shows the case where the number of slots s = 18 and the number of poles p = 6.
　図２において、回転電機の固定子３は、固定子鉄心４を有する。固定子鉄心４は、複数の電磁鋼板を軸方向に積層し製造され、円筒状のコアバック部４ａとコアバック部４ａから径方向内周側に突出している複数のティース部４ｂとを備えている。コアバック部４ａとティース部４ｂとにより、ティース部４ｂ間には１８個のスロット部ｓｐが形成される。このスロット部ｓｐには、固定子巻線１０のコイルが挿入される。なお、固定子巻線１０には、円形断面をもつ抵抗の小さい銅線が用いられる。 In FIG. 2, the stator 3 of the rotary electric machine has a stator core 4. The stator core 4 is manufactured by laminating a plurality of electromagnetic steel sheets in the axial direction, and includes a cylindrical core back portion 4a and a plurality of teeth portions 4b protruding radially inward from the core back portion 4a. There is. The core back portion 4a and the teeth portion 4b form 18 slot portions sp between the teeth portions 4b. The coil of the stator winding 10 is inserted into the slot portion sp. A copper wire having a circular cross section and low resistance is used for the stator winding 10.
　固定子鉄心４のティース部４ｂには、３スロット部ｓｐ毎に固定子巻線１０が巻き回される。具体的には、固定子巻線１０は、固定子鉄心４の軸方向に直交する断面方向から見て円形にティース部４ｂに巻き回される。より具体的には、固定子鉄心４の最外周側にはＡ相の固定子巻線１１が巻き回される。Ａ相の固定子巻線１１の内周側には、Ａ相の固定子巻線１１に隣り合うＢ相の固定子巻線１２が巻き回される。Ｂ相の固定子巻線１２の最内周側には、Ｂ相の固定子巻線１２に隣り合うＣの固定子巻線１３巻き回される。 The stator winding 10 is wound around the teeth portion 4b of the stator core 4 every 3 slot portions sp. Specifically, the stator winding 10 is wound around the teeth portion 4b in a circular shape when viewed from the cross-sectional direction orthogonal to the axial direction of the stator core 4. More specifically, the A-phase stator winding 11 is wound around the outermost peripheral side of the stator core 4. A B-phase stator winding 12 adjacent to the A-phase stator winding 11 is wound around the inner peripheral side of the A-phase stator winding 11. On the innermost peripheral side of the B-phase stator winding 12, the stator winding 13 of C adjacent to the B-phase stator winding 12 is wound.
　図２に示すように、１つのスロット部ｓｐには、Ａ相の固定子巻線１１の２つのＡ相のコイルが３スロット部毎に配置される。他の１つのスロット部ｓｐには、Ｂ相の固定子巻線１２の２つのＢ相のコイルが３スロット部毎に配置される。他の１つのスロット部ｓｐには、Ｃ相の固定子巻線１３の２つのＣ相のコイルが３スロット部毎に配置される。２つのコイルが配置されるスロット部ｓｐの位置は、各相毎に異なる。 As shown in FIG. 2, two A-phase coils of the A-phase stator winding 11 are arranged in every three slot portions in one slot portion sp. In the other slot portion sp, two B-phase coils of the B-phase stator winding 12 are arranged in every three slot portions. In the other slot portion sp, two C-phase coils of the C-phase stator winding 13 are arranged in every three slot portions. The position of the slot portion sp in which the two coils are arranged is different for each phase.
　また、図２に示すように、Ａ相の固定子巻線１１のコイルエンドは、Ｂ相の固定子巻線１２のコイルエンド及びＣ相の固定子巻線１３のコイルエンドよりも固定子鉄心の外周側に配置される。
　同様に、Ｂ相の固定子巻線１２のコイルエンドは、Ａ相の固定子巻線１１のコイルエンドとＣ相の固定子巻線のコイルエンドとの間に配置され、Ｃ相の固定子巻線１３のコイルエンドは、Ｂ相の固定子巻線１２のコイルエンドよりも固定子鉄心４の内周側に配置される。 Further, as shown in FIG. 2, the coil end of the A-phase stator winding 11 is a stator core more than the coil end of the B-phase stator winding 12 and the coil end of the C-phase stator winding 13. It is placed on the outer peripheral side of.
Similarly, the coil end of the B-phase stator winding 12 is arranged between the coil end of the A-phase stator winding 11 and the coil end of the C-phase stator winding, and is a C-phase stator. The coil end of the winding 13 is arranged on the inner peripheral side of the stator core 4 with respect to the coil end of the B-phase stator winding 12.
　図３は、実施の形態１に係る回転電機の固定子３のＡ相の固定子巻線１１のコイル１１ａ～１１ｆの配置構成を固定子鉄心４の軸方向から見た図である。なお、ここでは、Ａ相の固定子巻線１１の配置構成について説明するが、Ｂ相の固定子巻線１２のコイル及びＣ相の固定子巻線１４のコイルについても、スロット部ｓｐへの配置位置が異なるのみで、Ａ相の固定子巻線１１のコイル１１ａ～１１ｆと同様の配置構成が採用される。 FIG. 3 is a view of the arrangement configuration of the coils 11a to 11f of the A-phase stator winding 11 of the stator 3 of the rotary electric machine according to the first embodiment as viewed from the axial direction of the stator core 4. Although the arrangement configuration of the A-phase stator winding 11 will be described here, the coil of the B-phase stator winding 12 and the coil of the C-phase stator winding 14 are also connected to the slot portion sp. Only the arrangement position is different, and the same arrangement configuration as the coils 11a to 11f of the A-phase stator winding 11 is adopted.
　図３に示すように、Ａ相の固定子巻線１１のコイル１１ａ、１１ｃ及び１１ｅは、スロット部ｓｐの外周側に配置される。また、Ａ相の固定子巻線１１のコイル１１ｂ、１１ｄ及び１１ｆは、スロット部ｓｐの内周側に配置される。 As shown in FIG. 3, the coils 11a, 11c and 11e of the A-phase stator winding 11 are arranged on the outer peripheral side of the slot portion sp. Further, the coils 11b, 11d and 11f of the A-phase stator winding 11 are arranged on the inner peripheral side of the slot portion sp.
　また、図３に示すように、１つのスロット部ｓｐに配置された固定子巻線１１の一方のコイルエンドはコアバック部４ａの周方向の一方に延び、他方のコイルエンドは前述の方向とは逆の周方向へと延びる。 Further, as shown in FIG. 3, one coil end of the stator winding 11 arranged in one slot portion sp extends in one of the circumferential directions of the core back portion 4a, and the other coil end extends in the above-mentioned direction. Extends in the opposite circumferential direction.
　図４は、実施の形態１に係る回転電機の固定子３のＡ相の固定子巻線１１のコイル１１ａ～１１ｆの配線構成を示す図である。 FIG. 4 is a diagram showing a wiring configuration of coils 11a to 11f of the A-phase stator winding 11 of the stator 3 of the rotary electric machine according to the first embodiment.
　図４に示すように、外周側に配置されたコイル１１ａ、１１ｃ及び１１ｅの数は、内周側に配置されたコイル１１ｂ、１１ｄ及び１１ｆの数と同じである。 As shown in FIG. 4, the number of coils 11a, 11c and 11e arranged on the outer peripheral side is the same as the number of coils 11b, 11d and 11f arranged on the inner peripheral side.
　コイル１１ａとコイル１１ｂとは直列に接続される。コイル１１ｃとコイル１１ｄとは直列に接続される。コイル１１ｅとコイル１１ｆとは直列に接続される。直列に接続されたコイル１１ａ及びコイル１１ｂと、直列に接続されたコイル１１ｃ及びコイル１１ｄと、直列に接続されたコイル１１ｅ及びコイル１１ｆとは互いに並列に接続される。 The coil 11a and the coil 11b are connected in series. The coil 11c and the coil 11d are connected in series. The coil 11e and the coil 11f are connected in series. The coils 11a and 11b connected in series, the coils 11c and 11d connected in series, and the coils 11e and 11f connected in series are connected in parallel with each other.
　なお、実施の形態１においては、固定子３は、スロット部ｓｐのスロット数ｓ＝１８、極数ｐ＝６の場合について示したが、極数ｐ及びスロット部ｓｐの数ｓは、ｓ＝３ｐを満たせば良い。また、各相の固定子巻線のコイルの数はｓ／３個を満たせば良い。 In the first embodiment, the stator 3 shows the case where the number of slots s = 18 and the number of poles p = 6 of the slot portion sp, but the number of poles p and the number s of the slot portions sp are s =. It suffices to satisfy 3p. Further, the number of coils of the stator winding of each phase may satisfy s / 3.
　コイル１１ａ、１１ｃ及び１１ｅは第１コイルとも称し、コイル１１ｂ、１１ｄ及び１１ｆは第２コイルとも称する。 The coils 11a, 11c and 11e are also referred to as the first coil, and the coils 11b, 11d and 11f are also referred to as the second coil.
１－２．効果
　並列に接続されたコイルの第１コイル(コイル１１ａ、１１ｃ及び１１ｅ)はスロット部ｓｐの外側、第２コイル(コイル１１ｂ、１１ｄ及び１１ｆ)はスロット部ｓｐの内側に配置されるため、第１コイル、第２コイルでインダクタンスが異なる。インダクタンスの異なるコイルを並列に接続すると、インダクタンスがアンバランスとなることから、電動機の運転時の電流が並列に接続されたコイルに分流される際に、インダクタンスが小さいほうに電流が多くながれ、電流の分流がアンバランスとなり、コイルの損失が増えてしまう。 1-2. Effect The first coil ( coils 11a, 11c and 11e) of the coils connected in parallel is arranged outside the slot portion sp, and the second coil ( coils 11b, 11d and 11f) is arranged inside the slot portion sp. The inductance differs between the 1 coil and the 2nd coil. If coils with different inductances are connected in parallel, the inductance becomes unbalanced. Therefore, when the current during operation of the electric motor is shunted to the coils connected in parallel, the smaller the inductance, the larger the current, and the current. The diversion of the coil becomes unbalanced and the coil loss increases.
　実施の形態１の回転電機の固定子３によれば、互いに並列に接続された第１コイルと第２コイルの数が同じになるので、回転電機の運転時の電流が並列に接続されたコイルのインダクタンスが同じになるため、分流される際に、電流を均等に分流することができる。 According to the stator 3 of the rotary electric machine of the first embodiment, the number of the first coil and the second coil connected in parallel to each other is the same, so that the current during the operation of the rotary electric machine is connected in parallel. Since the inductances of the above are the same, the current can be evenly divided when the current is divided.
　さらに、電流の分流のアンバランスを解消することができることから、コイルの損失を低減することができ、高効率な回転電機を提供することができる。また、コイルの損失が低減できることから、コイルの温度上昇も小さくすることができる。 Furthermore, since the imbalance of the current shunt can be eliminated, the coil loss can be reduced and a highly efficient rotary electric machine can be provided. Further, since the loss of the coil can be reduced, the temperature rise of the coil can also be reduced.
　また、直列に接続される同相のコイルは電気的に接合する必要があるため、導電性の材料にて接合する必要がある。導電性の材料は長いとコストが高くなるため、短いほうが好ましい。実施の形態１の回転電機の固定子３によれば、同相の隣り合うコイルが直列に接続される。これにより、直列に接続されたコイルを接合する導電性の材料を短くすることができ、コストを抑えることができる。また、隣り合うコイルのため、結線の作業性も良好である。仮に隣り合うコイルでない個所と接合する場合、隣り合うコイルをまたいで接合する必要があることから、接合する導電性の材料の取り回しなどが困難となる。また、隣り合うコイルのため、コイル間を切断せずにコイルを連続して巻線することが容易となり、接続する際の加工や接合材料、接合部の絶縁材料の削減が可能となり、コストを削減することができる。 Also, since the in-phase coils connected in series need to be electrically joined, they need to be joined with a conductive material. The longer the conductive material, the higher the cost, so a shorter one is preferable. According to the stator 3 of the rotary electric machine of the first embodiment, adjacent coils having the same phase are connected in series. As a result, the conductive material for joining the coils connected in series can be shortened, and the cost can be suppressed. Further, since the coils are adjacent to each other, the workability of wiring is good. If it is to be joined to a place where the coils are not adjacent to each other, it is necessary to join the coils across the adjacent coils, which makes it difficult to handle the conductive material to be joined. In addition, since the coils are adjacent to each other, it is easy to wind the coils continuously without cutting between the coils, and it is possible to reduce the processing, joining material, and insulating material of the joint when connecting, which reduces the cost. It can be reduced.
実施の形態２．
２－１．構成
　図５は、実施の形態２に係る回転電機の固定子３の各相の固定子巻線１１～１３のコイルの巻き回し方向を固定子鉄心４の軸方向から見た図である。
　図５に示すように、Ａ相の固定子巻線１１のコイル１１ａは、固定子３の中心からみて、時計回りに巻回され、次に隣り合う固定子巻線１１のコイル１１ｂは反時計回りに巻回される。Ａ相の固定子巻線１１のコイル１１ａは時計回り、コイル１１ｂは反時計回りと交互に配置される。これにより、Ａ相の固定子巻線１１のコイルのコイルエンドの配置は、周方向に位相のずれた構成となる。 Embodiment 2.
2-1. Configuration FIG. 5 is a view of the coil winding direction of the stator windings 11 to 13 of each phase of the stator 3 of the rotary electric machine according to the second embodiment as viewed from the axial direction of the stator core 4.
As shown in FIG. 5, the coil 11a of the A-phase stator winding 11 is wound clockwise when viewed from the center of the stator 3, and the coil 11b of the next adjacent stator winding 11 is counterclockwise. It is wound around. The coils 11a of the A-phase stator winding 11 are arranged clockwise, and the coils 11b are arranged counterclockwise alternately. As a result, the arrangement of the coil ends of the coils of the A-phase stator winding 11 is configured to be out of phase in the circumferential direction.
　Ａ相の固定子巻線１１のコイルは、ｓ／３＝６個で構成され、固定子３のスロット部ｓｐ内に挿入されている。ここでいう固定子中心からみて時計回り、反時計回りは隣り合う固定子巻線のコイルが逆方向に巻かれていることを示しており、各相の巻線の巻かれる方向は、電動機の固定子を構成できる巻線の巻かれる方向であれば巻く方向はどのような形でも良い。 The coil of the A-phase stator winding 11 is composed of s / 3 = 6, and is inserted into the slot portion sp of the stator 3. The clockwise and counterclockwise directions when viewed from the center of the stator here indicate that the coils of the adjacent stator windings are wound in opposite directions, and the winding direction of the windings of each phase is that of the motor. The winding direction may be any shape as long as the winding direction that can form the stator is wound.
　Ｂ相の固定子巻線１２のコイル１２ａもＡ相と同様に、固定子３の中心からみて、時計回りに巻回され、次に隣り合う固定子巻線１２のコイル１２ｂは反時計回りに巻回される。Ｂ相の固定子巻線１２のコイル１２ａは時計回り、コイル１２ｂは反時計回りと交互に配置される。これにより、Ｂ相の固定子巻線１２のコイルのコイルエンドの配置は、周方向に位相のずれた構成となる。 Like the A phase, the coil 12a of the B-phase stator winding 12 is also wound clockwise when viewed from the center of the stator 3, and the coil 12b of the next adjacent stator winding 12 is counterclockwise. It is wound. The coil 12a of the B-phase stator winding 12 is arranged clockwise, and the coil 12b is arranged counterclockwise alternately. As a result, the arrangement of the coil ends of the coils of the B-phase stator winding 12 is configured to be out of phase in the circumferential direction.
　Ｃ相の固定子巻線１３のコイル１３ａもＡ相と同様に、固定子３の中心からみて、時計回りに巻回され、次に隣り合う固定子巻線１３のコイル１３ｂは反時計回りに巻回される。Ｃ相の固定子巻線１３のコイル１３ａは時計回り、コイル１３ｂは反時計回りと交互に配置される。これにより、Ｃ相の固定子巻線１３のコイルのコイルエンドの配置は、周方向に位相のずれた構成となる。 Like the A phase, the coil 13a of the C-phase stator winding 13 is also wound clockwise when viewed from the center of the stator 3, and the coil 13b of the next adjacent stator winding 13 is turned counterclockwise. It is wound. The coil 13a of the C-phase stator winding 13 is arranged clockwise, and the coil 13b is arranged counterclockwise alternately. As a result, the arrangement of the coil ends of the coils of the C-phase stator winding 13 is configured to be out of phase in the circumferential direction.
２－２．効果
　コイルをスロット部ｓｐ内に配置する際、コイルをスロット部ｓｐに挿入して各相ごとに配置する。これにより、コイルエンドが重ならずに挿入可能なため、挿入する際の挿入力が低減できる。実施の形態２の回転電機の固定子では、コイルエンドがほぼ全周に渡るため、特に各相ごとに挿入する必要がある。Ａ相、Ｂ相、Ｃ相の順でコイルを挿入すると、Ａ相のコイルエンドはＢ相、Ｃ相よりも固定子の外周側に存在し、Ｂ相のコイルエンドはＡ相とＣ相の間に存在することになる。このような構造にすることで、コイルエンドの配置がバランスよくなり、コイルエンドの周長を短くできる。従って、コストの低減が可能となり、コイルをスロット内に配置する際の挿入する力も低減することができる。
　また、各相ごとに外相、中相及び内相と別れるため、各相の判別もしやすくなり、作業性を向上することができる。 2-2. Effect When arranging the coil in the slot portion sp, the coil is inserted into the slot portion sp and arranged for each phase. As a result, the coil ends can be inserted without overlapping, so that the insertion force at the time of insertion can be reduced. In the stator of the rotary electric machine of the second embodiment, since the coil end extends over almost the entire circumference, it is particularly necessary to insert it for each phase. When the coils are inserted in the order of A phase, B phase, and C phase, the coil end of A phase exists on the outer peripheral side of the stator rather than the B phase and C phase, and the coil end of B phase is of A phase and C phase. It will exist in between. With such a structure, the arrangement of the coil ends is well-balanced, and the circumference of the coil ends can be shortened. Therefore, the cost can be reduced, and the insertion force when arranging the coil in the slot can also be reduced.
Further, since each phase is separated from the outer phase, the middle phase, and the inner phase, it becomes easy to distinguish each phase, and workability can be improved.
実施の形態３．
３－１．構成
　実施の形態２の回転電機の固定子３では、１つの相、例えば、Ａ相の固定子巻線１１のコイル１１ａ及びコイル１１ｂを交互に巻回しているため、コイル１１ａ及びコイル１１ｂの巻き回しの切り替えに時間がかかってしまう。 Embodiment 3.
3-1. Configuration In the stator 3 of the rotary electric machine of the second embodiment, since the coil 11a and the coil 11b of the stator winding 11 of one phase, for example, the A phase are alternately wound, the coil 11a and the coil 11b are wound. It takes time to switch the rotation.
　実施の形態３の回転電機の固定子３では、各相の固定子巻線１０は、その相の固定子巻線１０の１コイル分飛ばして巻回される。例えば、図５において、Ａ相の固定子巻線１１のコイル１１ａは、Ａ相の固定子巻線１１のコイル１１ｂを飛ばして巻回される。また、Ｂ相の固定子巻線１２のコイル１２ａは、Ｂ相の固定子巻線１２のコイル１２ｂを飛ばして巻回される。Ｃ相の固定子巻線１３のコイル１３ａは、Ｃ相の固定子巻線１３のコイル１３ｂを飛ばして巻回される。これにより、固定子巻線１０のコイルを巻く方向が同じとなり、固定子巻線１０のコイルをスムーズに巻くことが可能となる。
　さらに、固定子巻線１０を連続して巻くことから、固定子巻線１０を切る作業も不要となり、固定子巻線１０を切る時間も短縮することができる。 In the stator 3 of the rotary electric machine of the third embodiment, the stator winding 10 of each phase is wound by skipping one coil of the stator winding 10 of the phase. For example, in FIG. 5, the coil 11a of the A-phase stator winding 11 is wound by skipping the coil 11b of the A-phase stator winding 11. Further, the coil 12a of the B-phase stator winding 12 is wound by skipping the coil 12b of the B-phase stator winding 12. The coil 13a of the C-phase stator winding 13 is wound by skipping the coil 13b of the C-phase stator winding 13. As a result, the coil of the stator winding 10 is wound in the same direction, and the coil of the stator winding 10 can be wound smoothly.
Further, since the stator winding 10 is continuously wound, the work of cutting the stator winding 10 becomes unnecessary, and the time for cutting the stator winding 10 can be shortened.
　さらに、実施の形態３の回転電機の固定子３では、例えば、Ａ相の固定子巻線１１の第２コイルを連続して巻きつつ、Ａ相の固定子巻線１１の第２コイルをスロット部ｓｐの巻線挿入冶具等にはめ込む。その次に、Ａ相の固定子巻線１１の第１コイルを連続して巻き、スロットの巻線挿入冶具等にはめ込む。これにより、第２コイルが先に挿入冶具に入り、次に、第１コイルがスロットの巻線挿入冶具に入ることになる。 Further, in the stator 3 of the rotary electric machine of the third embodiment, for example, the second coil of the A-phase stator winding 11 is continuously wound while the second coil of the A-phase stator winding 11 is slotted. Fit it into the winding insertion tool of the part sp. Next, the first coil of the A-phase stator winding 11 is continuously wound and fitted into the winding insertion jig or the like of the slot. As a result, the second coil enters the insertion jig first, and then the first coil enters the winding insertion jig of the slot.
　巻線挿入冶具を用いて固定子巻線のコイルを挿入する場合、スロット部ｓｐ内にコイルが挿入される順番が第１コイルの次に第２コイルとなる。そのため、自然と第１コイルはスロット部ｓｐの固定子外周側、第２コイルはスロットの固定子内周側に配置される。これにより、同相の固定子巻線１０のコイルの配置を外周側と内周側とにすることができる。 When inserting the coil of the stator winding using the winding insertion tool, the order in which the coils are inserted into the slot portion sp is the second coil after the first coil. Therefore, the first coil is naturally arranged on the outer peripheral side of the stator of the slot portion sp, and the second coil is arranged on the inner peripheral side of the stator of the slot. As a result, the coils of the stator windings 10 having the same phase can be arranged on the outer peripheral side and the inner peripheral side.
　また、実施の形態１～実施の形態３の回転電機の固定子３では、固定子鉄心４の径方向外側にはＡ相の固定子巻線１１、中間にはＢ相の固定子巻線１２及び内側にはＣ相の固定子巻線１３を配置している。径方向外側のＡ相の固定子巻線１１は他の相に比べて径方向外側にあるため、コイルエンドの周長を長くする必要がある。また、固定子巻線１０のコイルをスロット部ｓｐに挿入する際、径方向で最も外側のＡ相の固定子巻線のコイルを挿入し、次に中間であるＢ相の固定子巻線のコイル、最後に最も径方向内側に存在するＣ相の固定子巻線のコイルの順で固定子巻線のコイルをスロット部ｓｐに挿入する。 Further, in the stator 3 of the rotary electric machine according to the first to third embodiments, the A-phase stator winding 11 is located outside the stator core 4 in the radial direction, and the B-phase stator winding 12 is located in the middle. A C-phase stator winding 13 is arranged inside and inside. Since the stator winding 11 of the A phase on the outer side in the radial direction is on the outer side in the radial direction as compared with the other phases, it is necessary to increase the peripheral length of the coil end. Further, when the coil of the stator winding 10 is inserted into the slot portion sp, the coil of the outermost A-phase stator winding in the radial direction is inserted, and then the coil of the intermediate B-phase stator winding is inserted. Insert the coil of the stator winding into the slot portion sp in the order of the coil and finally the coil of the C-phase stator winding that exists on the innermost side in the radial direction.
　そのため、Ａ相の固定子巻線１１のコイルはＢ相の固定子巻線１２のコイルを挿入する際にコイルエンド部が干渉するため、径方向外側に逃がす必要がある。またＢ相の固定子巻線１２のコイルを挿入後、Ｃ相の固定子巻線１３のコイルを挿入するため、Ｂ相の固定子巻線１２のコイルエンド部の干渉を防ぐため、コイルエンド部を径方向外側に逃がす必要があり、コイルエンド部の周長をＣ相の固定子巻線１３のコイルエンド部の周長よりも長くする必要がある。各相のコイル抵抗は、コイル抵抗による電圧降下を同一にした方が望ましいことから、抵抗を合わせるために、例えば、図２ではＡ相である、最も長い周長となる最も外側の相の固定子巻線１０のコイルの周長と、コイルの周長を合わせて巻線を行うことが一般的である、従って、例えば、図２ではＣ相である、内周側の相の固定子巻線１０のコイル周長が長くなり、コストが増加してしまう。 Therefore, the coil of the A-phase stator winding 11 needs to be released to the outside in the radial direction because the coil end portion interferes when the coil of the B-phase stator winding 12 is inserted. Further, since the coil of the C-phase stator winding 13 is inserted after the coil of the B-phase stator winding 12 is inserted, the coil end is prevented from interfering with the coil end portion of the B-phase stator winding 12. It is necessary to let the portion escape outward in the radial direction, and the peripheral length of the coil end portion needs to be longer than the peripheral length of the coil end portion of the C-phase stator winding 13. Since it is desirable that the coil resistance of each phase has the same voltage drop due to the coil resistance, in order to match the resistance, for example, in FIG. 2, the outermost phase, which is the A phase and has the longest peripheral length, is fixed. It is common to perform winding by matching the circumference of the coil of the child winding 10 with the circumference of the coil. Therefore, for example, the fixed child winding of the inner peripheral side phase, which is the C phase in FIG. The coil peripheral length of the wire 10 becomes long, which increases the cost.
　実施の形態３の固定子３の回転電機の固定子３では、Ｃ相の固定子巻線１３のコイルの周長をＡ相の固定子巻線１１のコイルの周長及びＢ相の固定子巻線１２のコイルの周長よりも短くする。そして、Ｃ相の固定子巻線１３のコイルの周長を短くした分のコイル抵抗低減分を、Ｃ相の固定子巻線１３のコイルの線径を小さくする。同様に、Ｂ相の固定子巻線１２のコイルの周長をＡ相の固定子巻線１１のコイルの周長よりも短くする。そして、Ｂ相の固定子巻線１２のコイルの周長を短くした分のコイル抵抗低減分を、Ｂ相の固定子巻線１２のコイルの線径を小さくする。 In the stator 3 of the rotary electric machine of the stator 3 of the third embodiment, the circumference of the coil of the C-phase stator winding 13 is changed to the circumference of the coil of the A-phase stator winding 11 and the B-phase stator. Make it shorter than the circumference of the coil of winding 12. Then, the coil resistance is reduced by the amount of shortening the circumference of the coil of the C-phase stator winding 13, and the wire diameter of the coil of the C-phase stator winding 13 is reduced. Similarly, the circumference of the coil of the B-phase stator winding 12 is made shorter than the circumference of the coil of the A-phase stator winding 11. Then, the coil resistance is reduced by the amount of shortening the circumference of the coil of the B-phase stator winding 12, and the wire diameter of the coil of the B-phase stator winding 12 is reduced.
　これにより、Ａ相の固定子巻線１１のコイル、Ｂ相の固定子巻線１２のコイル及びＣ相の固定子巻線１３のコイルのコイル抵抗を同じにすることができ、Ｂ相及びＣ相のコイル重量を減らすことができる。
　理想的な関係として、
　コイル周長は、
　Ａ相＞Ｂ相＞Ｃ相
　となり、
　コイルの線径も
　Ａ相＞Ｂ相＞Ｃ相
　となる。 As a result, the coil resistance of the coil of the A-phase stator winding 11 and the coil of the B-phase stator winding 12 and the coil of the C-phase stator winding 13 can be made the same, and the B-phase and C can be made the same. The coil weight of the phase can be reduced.
Ideally,
The coil circumference is
Phase A> Phase B> Phase C,
The wire diameter of the coil is also A phase> B phase> C phase.
　また、
　コイル周長をＡ相、Ｂ相と同じとし、
　Ａ相＝Ｂ相＞Ｃ相
　コイルの線径も
　Ａ相＝Ｂ相＞Ｃ相
としてもコイル重量も低減しつつ、各相のコイル抵抗も同じにすることができる。
　なお、コイルの線径で説明したが、コイルの断面積合計との関係となり、線径をコイルの断面積合計としても同様に表すことができる。例えば、最も内周側の相の固定子巻線のコイルの断面積は、前記固定子鉄心の最も外周側の相の固定子巻線の断面積よりも小さい。また、固定子巻線は、アルミ巻線であっても良い。 Also,
The coil circumference is the same as the A phase and B phase.
Even if the wire diameter of the A phase = B phase> C phase coil and the A phase = B phase> C phase, the coil weight can be reduced and the coil resistance of each phase can be the same.
Although described with reference to the wire diameter of the coil, the relationship with the total cross-sectional area of the coil is obtained, and the wire diameter can be similarly expressed as the total cross-sectional area of the coil. For example, the cross-sectional area of the coil of the stator winding of the innermost phase is smaller than the cross-sectional area of the stator winding of the outermost phase of the stator core. Further, the stator winding may be an aluminum winding.
３－２．効果
　実施の形態３の回転電機の固定子３によれば、固定子巻線に電流を通電した際、コイルエンドにかかる力を低減する効果もある。これは、コイルエンドが周方向にバランスよく配置され、コイルエンドにかかる力もバランスよく分散されるためである。 3-2. Effect According to the stator 3 of the rotary electric machine of the third embodiment, there is also an effect of reducing the force applied to the coil end when a current is applied to the stator winding. This is because the coil ends are arranged in a well-balanced manner in the circumferential direction, and the force applied to the coil ends is also well-balanced.
　実施の形態３の回転電機の固定子３によれば、固定子巻線に電流を通電した際、コイルエンドにかかる力を低減することができることから、固定子巻線にアルミ線を用いた固定子においても、コイルエンドが動きにくくなるため、固定子巻線へのダメージを低減することができ、固定子巻線の品質を改善することができる。 According to the stator 3 of the rotary electric machine of the third embodiment, when a current is applied to the stator winding, the force applied to the coil end can be reduced. Therefore, the stator winding is fixed by using an aluminum wire. Even in the child, since the coil end becomes difficult to move, damage to the stator winding can be reduced, and the quality of the stator winding can be improved.
　さらに、回転電機では、固定子３により回転子の磁石を着磁する方式もある。磁石を着磁するためには運転時の電流に対して大きな電流が必要である。そのため、コイルエンドのダメージが課題であり、コイルエンドに発生する力を低減する必要がある。 Further, in the rotary electric machine, there is also a method of magnetizing the magnet of the rotor by the stator 3. In order to magnetize the magnet, a large current is required with respect to the operating current. Therefore, damage to the coil end is an issue, and it is necessary to reduce the force generated at the coil end.
　実施の形態３に係る回転電機の固定子３によれば、コイルエンドにかかる力を低減することができるため、固定子３により回転子２の磁石を着磁する回転電機において巻線品質の悪化を抑えることができる回転電機を実現することができる。 According to the stator 3 of the rotary electric machine according to the third embodiment, the force applied to the coil end can be reduced, so that the winding quality deteriorates in the rotary electric machine in which the magnet of the rotor 2 is magnetized by the stator 3. It is possible to realize a rotary electric machine that can suppress the above.
　さらに、固定子巻線１０がアルミ線の場合、固定子巻線１０が柔らかいため、固定子３により回転子の磁石を着磁する方式の場合、コイルエンドのダメージが大きくなり、固定子巻線１０の変形も大きくなる。 Further, when the stator winding 10 is an aluminum wire, the stator winding 10 is soft, so in the case of the method of magnetizing the rotor magnet by the stator 3, the damage to the coil end becomes large and the stator winding The deformation of 10 also becomes large.
　そのため、アルミ線を用いた回転電機にて固定子３により回転子の磁石を着磁する方式の場合、実施の形態３の回転電機の固定子３によれば、コイルエンドのダメージを抑えることができ、かつ固定子巻線１０の変形も抑えることができる。 Therefore, in the case of a method in which the magnet of the rotor is magnetized by the stator 3 in a rotary electric machine using an aluminum wire, damage to the coil end can be suppressed according to the stator 3 of the rotary electric machine of the third embodiment. It is possible to suppress the deformation of the stator winding 10.
　また、回転子の磁石に希土類磁石を用いた場合、希土類磁石はフェライト磁石に比べて磁力が強いものの、着磁しにくい特性がある。そのため、回転電機において固定子３により回転子の希土類磁石を着磁する方式の場合、より大きな電流が必要となるため、コイルエンドの巻線に与えるダメージが大きくなるのが課題であった。実施の形態３の回転電機の固定子３によれば、通電時にコイルエンドにかかる力を低減することができるため、大きな電流を供給することが可能となる。 Also, when a rare earth magnet is used as the rotor magnet, the rare earth magnet has a stronger magnetic force than the ferrite magnet, but it is difficult to magnetize. Therefore, in the case of the method of magnetizing the rare earth magnet of the rotor by the stator 3 in the rotary electric machine, a larger current is required, so that the damage to the winding of the coil end becomes large. According to the stator 3 of the rotary electric machine of the third embodiment, the force applied to the coil end when energized can be reduced, so that a large current can be supplied.
　また、圧縮機に用いられる回転電機の場合、精度よく組み立てる必要があるため、回転子に配置された磁石が着磁されていると、磁石の吸引力により組立が難しくなり、結果、固定子と回転子との間の空隙（エアギャップ）を大きくする必要がある。
　回転子に配置された磁石、特に希土類磁石を着磁せずに圧縮機を組み立てた後、固定子により磁石を着磁する方式を用いた場合、磁石を着磁するエネルギーにより固定子のコイルにダメージを与え、コイルの品質低下を招いてしまう。 Also, in the case of a rotating electric machine used for a compressor, it is necessary to assemble it accurately, so if the magnet placed on the rotor is magnetized, it will be difficult to assemble due to the attractive force of the magnet, and as a result, it will be a stator. It is necessary to increase the gap (air gap) between the rotor and the rotor.
When the compressor is assembled without magnetizing the magnets placed on the rotor, especially rare earth magnets, and then magnetizing the magnets with the stator, the energy to magnetize the magnets causes the coil of the stator. It causes damage and deteriorates the quality of the coil.
　実施の形態３の回転電機の固定子３によれば、通電時にコイルエンドにかかる力を低減することができるため、圧縮機に用いた場合に、精度よく組み立てるために、回転子に配置された磁石を着磁せずに圧縮機を組み立てた後、固定子で磁石を着磁する際、コイルエンドにかかる力を低減することができる。従って、コイルへのダメージを低減することができ、コイルの品質低下を抑えることができ、高品質な圧縮機を提供することができる。 According to the stator 3 of the rotary electric machine of the third embodiment, since the force applied to the coil end when energized can be reduced, the stator is arranged on the rotor in order to assemble it accurately when used in a compressor. After assembling the compressor without magnetizing the magnet, it is possible to reduce the force applied to the coil end when magnetizing the magnet with the stator. Therefore, damage to the coil can be reduced, deterioration of the quality of the coil can be suppressed, and a high-quality compressor can be provided.
　実施の形態は、例として提示したものであり、実施の形態の範囲を限定することは意図していない。実施の形態は、その他の様々な形態で実施されることが可能であり、実施の形態の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行なうことができる。これら実施の形態及びその変形は、実施の形態の範囲及び要旨に含まれる。 The embodiment is presented as an example and is not intended to limit the scope of the embodiment. The embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the embodiment. These embodiments and variations thereof are included in the scope and gist of the embodiments.
　１　密閉容器、１ａ　油貯留部、２　回転子、３　固定子、４　固定子鉄心、４ａ　コアバック部、４ｂ　ティース部、１０　固定子巻線、１１　Ａ相の固定子巻線、１１ａ～１１ｆ　Ａ相の固定子巻線のコイル、１２　Ｂ相の固定子巻線、１２ａ、１２ｂ　Ｂ相の固定子巻線のコイル、１３　Ｃ相の固定子巻線、１３ａ、１３ｂ　Ｃ相の固定子巻線のコイル、２０　圧縮機構部、２１　回転軸、２２　主軸受、２３　副軸受、２４　ローリングピストン、２５　円筒シリンダ、４１　中央容器、４２　吐出管、４３　上容器、４４　吸入管、４５　下容器、ｓｐ　スロット部。 1 closed container, 1a oil storage part, 2 rotor, 3 stator, 4 stator core, 4a core back part, 4b teeth part, 10 stator winding, 11 A phase stator winding, 11a-11fA Phase stator winding coil, 12B phase stator winding, 12a, 12b B phase stator winding coil, 13C phase stator winding, 13a, 13b C phase stator winding Coil, 20 compression mechanism, 21 rotating shaft, 22 main bearing, 23 auxiliary bearing, 24 rolling piston, 25 cylindrical cylinder, 41 central container, 42 discharge pipe, 43 upper container, 44 suction pipe, 45 lower container, sp slot Department.

Claims (9)

  1. 　円筒状のコアバック部と、
    　前記コアバック部から前記コアバック部の径方向内周側に突出し、前記コアバック部の軸方向に形成された複数のティース部とを有し、前記コアバック部と、隣り合う前記ティース部との間にスロット部が形成された固定子鉄心と、
    　前記スロット部を通り所定スロット部数離れたスロット部に巻回される固定子巻線と
    を備えた回転電機の固定子において、
    　極数ｐ及びスロット数ｓは、ｓ＝３ｐを満たし、
    　前記固定子巻線は、三相の固定子巻線を有し、各相の固定子巻線のコイルの数はｓ／３個であり、
    　１つの前記スロット部には、２つの同相の固定子巻線のコイルが挿入され、
    　前記２つの同相の固定子巻線のコイルのうち、一方の固定子巻線の複数の第１コイルは、前記１つのスロット部において、前記他方の固定子巻線の複数の第２コイルよりも前記固定子鉄心の外周側にそれぞれ配置され、
    　前記複数の第１コイルの数は、前記複数の第２コイルの数と同じであり、
    　前記複数の第１コイルと前記複数の第２コイルとは、それぞれ直列に接続され、
    　前記直列に接続された前記第１コイル及び前記第２コイルの各々は、互いに並列に接続される、
    回転電機の固定子。     Cylindrical core back and
    It has a plurality of teeth portions protruding from the core back portion toward the inner peripheral side in the radial direction of the core back portion and formed in the axial direction of the core back portion, and the core back portion and the adjacent teeth portions. With a stator core with a slot formed between them,
    In a stator of a rotary electric machine provided with a stator winding that is wound around a slot portion separated by a predetermined number of slots through the slot portion.
    The number of poles p and the number of slots s satisfy s = 3p, and
    The stator winding has a three-phase stator winding, and the number of coils of the stator winding of each phase is s / 3.
    Two in-phase stator winding coils are inserted into one of the slots.
    Of the two coils of the stator winding of the same phase, the plurality of first coils of the one stator winding are larger than the plurality of second coils of the other stator winding in the one slot portion. It is arranged on the outer peripheral side of the stator core, respectively.
    The number of the plurality of first coils is the same as the number of the plurality of second coils.
    The plurality of first coils and the plurality of second coils are connected in series, respectively.
    Each of the first coil and the second coil connected in series are connected in parallel with each other.
    Stator of rotary electric machine.
  2. 　前記一方の固定子巻線のコイルエンドは、前記コアバック部の周方向の一方に延び、前記他方の固定子巻線のコイルエンドは、前記周方向と逆の周方向に延びる、
    請求項１に記載の回転電機の固定子。     The coil end of the one stator winding extends in one of the circumferential directions of the core back portion, and the coil end of the other stator winding extends in the circumferential direction opposite to the circumferential direction.
    The stator of a rotary electric machine according to claim 1.
  3. 　前記固定子巻線の各相をＡ相、Ｂ相及びＣ相とした場合に、
    　前記Ａ相の固定子巻線のコイルエンドは、前記Ｂ相の固定子巻線のコイルエンド及び前記Ｃ相の固定子巻線のコイルエンドよりも前記固定子鉄心の外周側に配置され、
    　前記Ｂ相の固定子巻線のコイルエンドは、前記Ａ相の固定子巻線のコイルエンドと前記Ｃ相の固定子巻線のコイルエンドとの間に配置され、
    　前記Ｃ相の固定子巻線のコイルエンドは、前記Ｂ相の固定子巻線のコイルエンド及び前記Ｃ相の固定子巻線のコイルエンドよりも前記固定子鉄心の内周側に配置される、
    請求項１又は２に記載の回転電機の固定子。     When each phase of the stator winding is A phase, B phase and C phase,
    The coil end of the A-phase stator winding is arranged on the outer peripheral side of the stator core with respect to the coil end of the B-phase stator winding and the coil end of the C-phase stator winding.
    The coil end of the B-phase stator winding is arranged between the coil end of the A-phase stator winding and the coil end of the C-phase stator winding.
    The coil end of the C-phase stator winding is arranged on the inner peripheral side of the stator core with respect to the coil end of the B-phase stator winding and the coil end of the C-phase stator winding. ,
    The stator of a rotary electric machine according to claim 1 or 2.
  4. 　前記一方の固定子巻線のコイルの巻線方向は、前記他方の固定子巻線の巻線方向とは逆方向である、
    請求項１～３のいずれか１項に記載の回転電機の固定子。     The winding direction of the coil of the one stator winding is opposite to the winding direction of the other stator winding.
    The stator of a rotary electric machine according to any one of claims 1 to 3.
  5. 　前記三相の固定子巻線のうち、前記固定子鉄心の最も内周側の相の固定子巻線のコイルの周長は、前記固定子鉄心の最も外周側の相の固定子巻線の周長よりも短い、
    請求項１～４のいずれか１項に記載の回転電機の固定子。     Of the three-phase stator windings, the circumference of the coil of the stator winding of the innermost phase of the stator core is the same as that of the stator winding of the outermost phase of the stator core. Shorter than the circumference,
    The stator of a rotary electric machine according to any one of claims 1 to 4.
  6. 　前記最も内周側の相の固定子巻線のコイルの断面積は、前記最も外周側の相の固定子巻線のコイルの断面積よりも小さい、
    請求項５に記載の回転電機の固定子。     The cross-sectional area of the coil of the stator winding of the innermost phase is smaller than the cross-sectional area of the coil of the stator winding of the outermost phase.
    The stator of a rotary electric machine according to claim 5.
  7. 　前記固定子巻線はアルミ巻線である、
    請求項１～６のいずれか１項に記載の回転電機の固定子。     The stator winding is an aluminum winding.
    The stator of a rotary electric machine according to any one of claims 1 to 6.
  8. 　前記固定子巻線のコイルは、回転子に配置された希土類磁石を着磁する、
    請求項１～７のいずれか１項に記載の回転電機の固定子。     The coil of the stator winding magnetizes a rare earth magnet arranged on the rotor.
    The stator of a rotary electric machine according to any one of claims 1 to 7.
  9. 　請求項１～８のいずれか１項に記載の回転電機の固定子を有する密閉型圧縮機。 A sealed compressor having the stator of the rotary electric machine according to any one of claims 1 to 8.
PCT/JP2019/032626 2019-08-21 2019-08-21 Rotating electric machine stator WO2021033290A1 (en)

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Publication number Priority date Publication date Assignee Title
WO2022264588A1 (en) * 2021-06-18 2022-12-22 株式会社デンソー Motor
WO2023032134A1 (en) * 2021-09-02 2023-03-09 三菱電機株式会社 Electric motor, compressor, and refrigeration cycle device
WO2023248268A1 (en) * 2022-06-20 2023-12-28 三菱電機株式会社 Stator, rotary electric machine, compressor, and refrigeration cycle apparatus

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JP2012050262A (en) * 2010-08-27 2012-03-08 Mitsubishi Electric Corp Permanent magnet type motor and closed compressor
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WO2022264588A1 (en) * 2021-06-18 2022-12-22 株式会社デンソー Motor
WO2023032134A1 (en) * 2021-09-02 2023-03-09 三菱電機株式会社 Electric motor, compressor, and refrigeration cycle device
WO2023248268A1 (en) * 2022-06-20 2023-12-28 三菱電機株式会社 Stator, rotary electric machine, compressor, and refrigeration cycle apparatus

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