WO2016021451A1 - 回転電機の固定子、及びこれを備えた回転電機 - Google Patents
回転電機の固定子、及びこれを備えた回転電機 Download PDFInfo
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- WO2016021451A1 WO2016021451A1 PCT/JP2015/071439 JP2015071439W WO2016021451A1 WO 2016021451 A1 WO2016021451 A1 WO 2016021451A1 JP 2015071439 W JP2015071439 W JP 2015071439W WO 2016021451 A1 WO2016021451 A1 WO 2016021451A1
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- stator
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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
- H02K3/14—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
-
- 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 rotating electric machine such as a motor or a generator, and a rotating electric machine including the same.
- Patent Document 1 JP 2011-234482 A (Patent Document 1).
- This publication provides “a stator for a rotating electrical machine that is capable of reducing the damage to the insulation film of the conductors constituting the stator coil while suppressing the increase in the coil end of the stator coil.
- the turn portion is spaced from the first slot by a protruding portion protruding from the first slot in a direction parallel to the axial direction of the stator core and a first bent portion bent in the circumferential direction from the tip of the protruding portion ( A slope portion extending obliquely at an angle of less than 90 degrees toward the k-th slot (the other slot) apart by one magnetic pole pitch, and the k-th portion bent from the tip of the slope portion in a direction parallel to the axial direction of the stator core.
- the second bent portion connected to the slot accommodating portion accommodated in the slot.
- the turn portion has two bent portions formed in an asymmetric shape in the circumferential direction.
- an object of the present invention is to provide a stator for a rotating electrical machine in which the height of the coil end is suppressed while avoiding interference between adjacent conductors at the coil end of the stator coil, and a rotating electrical machine including the stator. .
- a stator of a rotating electrical machine including a stator core having a plurality of slots and a stator coil inserted into the slots.
- the stator coil has two or more conductors arranged in the same layer as the first conductor and inserted in a slot adjacent to the first conductor, and is a coil to the outer diameter.
- the shape of the protrusion is configured to draw an arc.
- stator for a rotating electrical machine in which the height of the coil end is suppressed while avoiding interference between adjacent conductors at the coil end of the stator coil, and a rotating electrical machine including the stator.
- the figure which looked at the stator of a present Example perpendicularly to the axial direction.
- a rotary electric machine for a hybrid electric vehicle is used as an example of the rotary electric machine.
- axial direction refers to a direction along the rotation axis of the rotating electrical machine.
- the circumferential direction refers to the direction along the rotational direction of the rotating electrical machine.
- the “radial direction” refers to a radial direction (radial direction) when the rotational axis of the rotating electrical machine is the center.
- Inner circumference side refers to the radially inner side (inner diameter side)
- outer circumference side refers to the opposite direction, that is, the radially outer side (outer diameter side).
- the embodiment described here relates to a coil structure of a stator of a rotating electric machine.
- the rotating electrical machine is roughly divided into a cylindrical stator and a rotor arranged at a predetermined gap on the inner peripheral side of the stator.
- the stator has a plurality of magnetic poles arranged so that the polarities are alternately different in the rotation direction, and has a cylindrical stator core and a plurality of stator coils wound around the stator core. And have.
- the stator core is formed with a plurality of slots penetrating in the axial direction and arranged in the circumferential direction in order to accommodate the stator coil.
- Each stator coil is configured by electrically connecting a number of conductors accommodated in each slot, and extends in the slot in the axial direction and is drawn from one end in the axial direction of the slot.
- the lead wire portion extends across a plurality of slots spaced at a predetermined circumferential pitch so as to correspond to the plurality of magnetic poles.
- Each stator coil has a crank portion for moving between layers when separated at a predetermined circumferential pitch, and is configured such that coils drawn from adjacent slots do not interfere with each other.
- a bent portion that is bent back from the radially outer side to the radially inner side is provided. Since the distance that avoids interference between adjacent coils can be increased, the bending back bending portion can reduce the height in the axial direction, thereby realizing a low coil end and a gap with other devices such as the mission section. Can be secured.
- FIG. 1 is a block diagram of a hybrid electric vehicle equipped with a rotating electrical machine according to an embodiment of the present invention.
- the vehicle 1 is equipped with an engine 2 and a rotating electrical machine 3 as vehicle power sources.
- Two rotating electrical machines having different roles may be used in combination. In this case, one rotating electrical machine performs both power generation and vehicle driving, and the other rotating electrical machine is responsible for driving the vehicle.
- Rotational torque generated by the engine 2 and the rotating electrical machine 3 is transmitted to wheels (drive wheels) 6 via a transmission 4 such as a continuously variable transmission or a stepped automatic transmission, and a differential gear 5.
- the rotating electrical machine 3 is mounted between the engine 2 and the transmission 4 or in the transmission 4. Therefore, the rotating electrical machine 3 is required to have a small size and high output in order to minimize the influence of the space on the vehicle 1.
- FIG. 2 is a partial cross-sectional view schematically showing the rotary electric machine 3, in which the left region is shown in cross section with the shaft 201 in between, and the right region is shown as a side view.
- the rotating electrical machine 3 is accommodated in the case 7.
- the case 7 is configured using the case of the engine 2 or the case of the transmission 4.
- the rotating electrical machine 3 is mounted in the transmission 4, the case 7 is configured using the case of the transmission 4.
- the rotating electrical machine 3 includes a stator 100 and a rotor 200.
- the rotor 200 is disposed on the inner peripheral side of the stator 100 with a gap 11 therebetween.
- the rotor 200 is fixed to the shaft 201 and rotates integrally with the shaft 201. Both ends of the shaft 201 are rotatably supported by the case 7 by bearings 202A and 202B.
- the outer periphery of the stator 100 is fixed to the inner periphery of the case 7 using bolts 12 or the like.
- the rotating electrical machine 3 is a three-phase synchronous motor having a permanent magnet in the rotor 200, and operates as a motor when a large current (for example, about 300 A) is supplied to the stator 100.
- FIG. 3 is a perspective view showing the stator 100 of the rotating electrical machine 1 as a single unit
- FIG. 4 is a cross-sectional view showing the inside of each slot 105.
- the stator 100 includes a stator core (also referred to as a stator core) 101 in which a plurality of slots 105 are formed on the inner peripheral side, and a U wound around the stator core 101. And three stator coils 102 corresponding to the phase, the V phase, and the W phase.
- the slots 105 are formed so as to penetrate in the axial direction, and are arranged at equal intervals in the circumferential direction at a predetermined circumferential pitch, and slits 108 extending in the axial direction are formed on the inner circumferential side.
- Each stator coil 102 has a large number of conductors 106 inserted and held in slots 105, as will be described later.
- the conductors 106 adjacent in the same slot 105 are welded to each other at a welded portion 104 provided on one end side in the axial direction of the stator core 101 (the lower end side in FIG. 3). Is a long stator coil 102 electrically connected by a welded portion 104.
- Insulating paper 103 is inserted into each slot 105, and the insulating paper 103 insulates between the straight portion passing through the slot 105 of the conductor 106 and the stator core 101. As shown in FIG. 4, the insulating paper 103 is provided so as to bundle two adjacent conductors 106 among the four conductors 106 arranged in each slot 105, that is, two insulations are provided in each slot 105. Paper 103 is provided.
- Each stator coil 102 extends across a plurality of slots 105 spaced apart at a predetermined circumferential pitch by a lead wire portion 107 having a substantially U shape or a substantially V shape drawn from one axial end of the slot 105.
- the plurality of stator coils 102 generate a plurality of magnetic poles arranged so that the polarities are alternately different in the rotation direction.
- the four conductors 106a, 106b, 106c, and 106d inserted into the slot 105 are arranged in a row in the radial direction of the stator core 101 so as to form concentric layers.
- the positions where the conductors 106a, 106b, 106c, and 106d are inserted into the slots 105 are defined as a first layer, a second layer, a third layer, and a fourth layer in order from the inner diameter direction. That is, the conductor 106a is disposed and inserted in the first layer, the conductor 106b is disposed and inserted in the second layer, the conductor 106c is disposed in the third layer, and the conductor 106d is disposed and inserted in the fourth layer.
- the stator coil 102 has a crank portion 109 with a twist when moving from the first layer to the second layer and when moving from the third layer to the fourth layer. .
- twisting at the time of transition between layers is not essential.
- FIG. 5 is a view of the state where the coil is inserted into the stator core as viewed from the inner diameter side.
- Each conductor 106 constituting the stator coil 102 is a square coil in cross section, as shown in FIGS.
- Each conductor 106 has a straight portion 110 that passes through the slot 105 in the axial direction, and one lead line portion 107 that is drawn from one axial end (the upper end in FIG. 3) of the slot 105 has a U-shape or V-shape.
- a portion of the conductor 106 that is drawn out from the slot 105 and constitutes a coil end portion is referred to as a coil end conductor portion 300.
- the detailed structure of the coil end conductor part 300 will be described later.
- a segment coil can also be used as the conductor 106.
- coil ends positioned at both axial ends from the end of the stator core 101 can be formed in advance, and an appropriate insulation distance between different phases or between the same phases can be obtained. Can be easily provided.
- FIG. 6 is a view showing the appearance of the stator of the present embodiment
- FIG. 7 is a view showing the appearance of the conventional stator.
- the conductor 106 When the stator 100 is viewed from the axial direction, the conductor 106 is disposed on the circumference of a certain radius R.
- the outer diameter of the conductor 106 in this embodiment is a configuration having a molded shape that draws a smooth arc, and as shown in FIG. 7, the outer diameter of the conventional conductor 106 is relative to the outer diameter line.
- the configuration has a wavy shaped shape W.
- the conductor 106 is formed so that the gap 111 generated when the adjacent conductors intersect each other is a parallelogram, so that even when the wire diameter is large, the gap between the adjacent conductors can be increased. An insulation distance can be secured.
- FIG. 8 is a view of the stator 100 of this embodiment as viewed perpendicular to the axial direction.
- the conductor 106 drawn out from the stator core forms a substantially trapezoidal shape extending in the outer diameter direction (left-right direction in FIG. 8) and parallel to the axial direction (up-down direction in FIG. 8).
- the protrusion of the coil end portion in the outer diameter direction can be suppressed to the minimum, and the rotating electric machine can be reduced in size and space.
- direct cooling by transmission oil or indirect cooling by a water channel or air flow is performed on the housing assembled outside the stator, but by providing a planar shape 112 in the outer diameter direction of the coil end.
- the flow of the cooling member can be improved and the cooling effect can be enhanced.
- FIG. 9 is a diagram showing a conventional configuration of the coil end conductor portion 300 of the conductor 106 constituting the stator coil 102
- FIGS. 10 to 12 are diagrams showing the coil end conductor portion 300 in this embodiment. It is.
- each coil end conductor portion 300 has a straight portion 110 extending in the axial direction from the slot at both ends, and forms a bent portion 302 for connecting to the oblique portion 301 in the axial direction.
- the crank portion 303 for layer transition is formed at the vertex of the skew portion.
- the wire diameter width or the wire diameter width or more between the skewed portion 301 and the crank portion 302 does not protrude to the outer diameter.
- FIG. 9 the wire diameter width or the wire diameter width or more between the skewed portion 301 and the crank portion 302 does not protrude to the outer diameter.
- bent portion 305 between the slanting portion 301 and the crank portion 303 that is bent and returned from the outer diameter to the inner diameter or from the inner diameter to the outer diameter in the radial direction by the width of the wire diameter. Formed in shape.
- the axial connection angle 304 from the straight portion 110 penetrating in the axial direction of the conductor 106 to the oblique portion 301 is the same shape at both ends when the crank portion 303 is at the center.
- the end conductor portion 300 has a shape having no bent portion in the axial direction between the skew portion 301 and the crank portion 303 at the top of the skew portion.
- the coil end conductor portion 300 has a skew portion 301 whose axial height changes, and a radial bent portion 305 provided in the middle of the skew portion 301 is adjacent to another coil end conductor portion. It becomes the structure which adjoins 300 skew feeding parts 301 in radial direction.
- the coil end height can be reduced regardless of the wire diameter because interference with the adjacent stator coil can be avoided while minimizing the protrusion of the coil end portion in the outer direction of the stator core.
- the bending portion provided in the axial direction in the segment coil in the stator of the rotating electrical machine for the vehicle is provided in the stator core outer diameter direction with one apex portion and two slot root portions.
- the second-stage bent part or more bent back from the outer diameter to the inner diameter direction is provided.
- this invention is not limited to the above-mentioned Example, Various modifications are included.
- the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
Abstract
Description
2:エンジン
3:回転電機
4:変速機
5:ディファレンシャルギア
6:車輪
7:ケース
100:固定子
101:固定子コア
102:固定子コイル
103:絶縁紙
104:導体溶接部
105:スロット
106,106a~d:導体
107:U字またはV字に成形された導体引き出し部
108:スロットに設けたスリット部
109:クランク部
110:スロット内の導体直線部
111:導体間の交差する時に生じる隙間
112:コイルエンド外径の平面形状
200:回転子
201:シャフト
202A、202B:軸受
300:コイルエンド導体部
301:斜行部
302:導体斜行部と直線部の屈曲部
303:固定子コイルレイヤー移行のためのクランク部
304:導体斜行部と直線部の屈曲部の接続角度
305:斜行部に設けた径方向屈曲部
Claims (11)
- 複数のスロットを有する固定子コアと、
前記スロットに挿入された固定子コイルとを備える回転電機の固定子であって、
前記固定子コイルが、第1の導体と同じレイヤーに配置され、かつ、当該第1の導体と隣接するスロットに挿入される2つ以上の導体とを有し、外径へのコイル突出部の形状が円弧を描くように構成されている回転電機の固定子。 - 請求項1に記載の回転電機の固定子において、
前記固定子コイルのコイルエンド部において、2つのスロット挿入部の間に、レイヤーを移行するクランク部の他に、径方向外側から径方向内側へ曲げ戻る屈曲部、又は径方向内側から径方向外側へ曲げ戻る屈曲部を有する回転電機の固定子。 - 分布巻の固定子コイルを備える回転電機の固定子において、
前記固定子コイルのコイルエンド導体部が、レイヤーを移行するクランク部の他に、径方向外側から径方向内側へ曲げ戻る屈曲部、又は径方向内側から径方向外側へ曲げ戻る屈曲部を有する回転電機の固定子。 - 請求項1又は3に記載の回転電機の固定子において、
前記固定子コイルが、前記屈曲部を有する第1の導体と、
前記第1の導体と同じレイヤーに配置され、かつ、当該第1の導体と隣接するスロットに挿入される第2の導体とを有し、
前記第1の導体の屈曲部の径方向内側を、前記第2の導体が通過している回転電機の固定子。 - 請求項4に記載の回転電機の固定子において、
前記第1の導体と前記第2の導体とのそれぞれが、軸方向高さの変わる斜行部を有し、
前記第1の導体において、前記屈曲部が、前記斜行部に配置され、当該屈曲部と、前記第2の導体の斜行部とが径方向に隣接している回転電機の固定子。 - 請求項1乃至4のいずれかに記載の回転電機の固定子において、
断面形状が角型であることを特徴とする回転電機の固定子。 - 請求項1乃至4のいずれかに記載の回転電機の固定子において、
コイル端末部を溶接していることを特徴とする回転電機の固定子。 - 請求項1乃至4のいずれかに記載の回転電機の固定子において、
前記固定子コアの全周に渡り、連続して巻回されていることを特徴とする回転電機の固定子。 - 請求項1乃至4のいずれかに記載の回転電機の固定子において、
前記レイヤーを移行するクランク部にねじりを伴うことを特徴とする回転電機の固定子。 - 請求項1乃至4のいずれかに記載の回転電機の固定子において、
固定子コアから引き出された固定子コイルが外径方向に広がる形状であり、軸方向に対して並行になるような略台形形状を形成することを特徴とする回転電機の固定子。 - 請求項1乃至10のいずれかに記載の回転電機の固定子を備える回転電機。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201580041878.2A CN106663975B (zh) | 2014-08-07 | 2015-07-29 | 旋转电机的定子,以及具备该定子的旋转电机 |
CN202010150165.2A CN111245119B (zh) | 2014-08-07 | 2015-07-29 | 旋转电机的定子,以及具备该定子的旋转电机 |
JP2016540167A JP6461158B2 (ja) | 2014-08-07 | 2015-07-29 | 回転電機の固定子、及びこれを備えた回転電機 |
US15/320,943 US10554085B2 (en) | 2014-08-07 | 2015-07-29 | Rotating electrical-machine stator, and rotating electrical machine provided with same |
US16/732,546 US11387698B2 (en) | 2014-08-07 | 2020-01-02 | Rotating-electrical-machine stator, and rotating electrical machine provided with same |
Applications Claiming Priority (2)
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JP2014-160935 | 2014-08-07 | ||
JP2014160935 | 2014-08-07 |
Related Child Applications (2)
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US15/320,943 A-371-Of-International US10554085B2 (en) | 2014-08-07 | 2015-07-29 | Rotating electrical-machine stator, and rotating electrical machine provided with same |
US16/732,546 Continuation US11387698B2 (en) | 2014-08-07 | 2020-01-02 | Rotating-electrical-machine stator, and rotating electrical machine provided with same |
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WO2016021451A1 true WO2016021451A1 (ja) | 2016-02-11 |
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JP (1) | JP6461158B2 (ja) |
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WO2018003461A1 (ja) * | 2016-06-30 | 2018-01-04 | 日立オートモティブシステムズ株式会社 | 回転電機 |
CN107733116A (zh) * | 2016-08-10 | 2018-02-23 | 富士电机株式会社 | 定子以及具备该定子的旋转电机 |
JP2018088729A (ja) * | 2016-11-28 | 2018-06-07 | トヨタ自動車株式会社 | 回転電機のステータ |
WO2022137765A1 (ja) * | 2020-12-22 | 2022-06-30 | 株式会社日立製作所 | 回転電機、電動ホイールおよび車両 |
CN114762221A (zh) * | 2020-03-11 | 2022-07-15 | 株式会社东芝 | 旋转电机的定子以及旋转电机 |
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JP6614067B2 (ja) * | 2016-08-24 | 2019-12-04 | 株式会社デンソー | 回転電機の固定子 |
JP6996407B2 (ja) * | 2018-04-19 | 2022-01-17 | スズキ株式会社 | 固定子コイル及びこれを備えた固定子 |
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Also Published As
Publication number | Publication date |
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US10554085B2 (en) | 2020-02-04 |
CN106663975A (zh) | 2017-05-10 |
US20170133899A1 (en) | 2017-05-11 |
CN111245119A (zh) | 2020-06-05 |
JPWO2016021451A1 (ja) | 2017-04-27 |
US20200136452A1 (en) | 2020-04-30 |
CN111245119B (zh) | 2023-03-14 |
US11387698B2 (en) | 2022-07-12 |
JP6461158B2 (ja) | 2019-01-30 |
CN106663975B (zh) | 2020-03-27 |
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