WO2013080377A1 - 回転電機及び回転電機装置 - Google Patents
回転電機及び回転電機装置 Download PDFInfo
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- WO2013080377A1 WO2013080377A1 PCT/JP2011/077948 JP2011077948W WO2013080377A1 WO 2013080377 A1 WO2013080377 A1 WO 2013080377A1 JP 2011077948 W JP2011077948 W JP 2011077948W WO 2013080377 A1 WO2013080377 A1 WO 2013080377A1
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- coil
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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
- H02K3/28—Layout of windings or of connections between windings
Definitions
- the present invention relates to a stator structure of a rotating electrical machine and a rotating electrical machine apparatus.
- Patent Document 1 As a background art of this technical field, which is configured to be driven with a power transistor having a limited current capacity and to be driven with an output sufficiently larger than the current capacity of the power transistor. Further, the terminal means is configured to supply currents separately to two or more sets of armature windings.
- Patent Document 2 armature windings distributed in slots of a stator of a three-phase motor are armature windings in each slot in the order of outer phase, middle phase, and inner phase.
- the motor is configured such that the cross-sectional area of the armature winding is larger in the outer phase than in the middle phase and smaller in the inner phase than the middle phase.
- the motor is a multi-winding motor in which a plurality of sets of three-phase windings individually driven by a plurality of current control circuits are provided in the same stator slot.
- the motor system in this case is a slot combination in which the required number of windings can be realized as a parallel circuit.
- the windings are lap windings with excellent balance between the windings, and the arrangement of a plurality of sets of three-phase windings is such that several consecutive coils are arranged in the U phase, V phase, or W phase of each three-phase winding. Assigned. That is, when the motor is structurally divided in a range that is equally divided in the circumferential direction, each phase of each winding is arranged around one of them.
- Patent Document 1 in order to further increase the number of windings without increasing the number of slots, two coil elements are arranged in the same slot, and currents that are out of phase from two different current control circuits are arranged in this. It is also described as flowing.
- a concentric winding pattern may be obtained by equivalent conversion and used.
- the winding work is automated by the insertion. After all the windings are divided into several insertion times, all the coils after the insertion times previously wound on the jig are assembled together. In this case, since the old coil after the insertion is arranged outside, the straddling portion becomes long and the total winding length becomes large. For this reason, the resistance value of an old coil may become large compared with the coil arrange
- Patent Document 2 discloses a three-phase winding with a good balance by assigning a large cross-sectional area to a coil having a long circumference in terms of electric wire arrangement, increasing the electric wire diameter, and adjusting the resistance value. The technical content to realize the line is shown.
- a slot combination capable of forming a plurality of windings generally has a large number of slots, and the work cost of the windings becomes large.
- the coils share the same magnetic flux, causing mutual interference and stable control. Is extremely difficult.
- Patent Document 1 it is said that when currents are supplied from two different current control circuits to two coil elements arranged in the same slot, currents that are out of phase are supplied. This means that the total torque value is reduced from twice the original value.
- changing the diameters of the coils included in the same winding makes the winding complicated and increases the operation cost.
- Patent Document 3 can be cited as one that alleviates mutual interference between coils when an in-phase current is passed.
- Patent Document 3 is the same as Patent Document 1 except that the number of windings is increased without increasing the number of slots.
- a plurality of partial windings provided at the same position of the stator core are arranged in different sets of three-phase windings. In this way, the mutual winding between the different three-phase windings is suppressed.
- Patent Document 1 and Patent Document 3 in order to avoid an increase in the number of slots, a large number of windings tend to be wound around the same slot.
- a winding disposed on the inlet side of the slot (inner peripheral side of the stator core) and a winding disposed on the bottom of the slot (outer peripheral side of the stator core) In this case, the wire length is different, and the magnetic coupling between the winding and the iron core is different, resulting in a difference in inductance.
- the winding wound around the entrance side of the slot has a small inductance.
- the inductance differs between the winding arranged on the inlet side of the slot and the winding arranged on the bottom side of the slot.
- Position control is required at high acceleration / deceleration when driving an injection shaft of an injection molding machine that requires a large output and a large torque, or driving a pressure slide of a press machine, but the difference in inductance due to winding is not preferable.
- the present invention provides a rotating electric machine that suppresses a difference in inductance between a plurality of coils when a plurality of sets of multiphase coils are wound around a plurality of slots of a stator.
- the present invention provides a rotating electrical machine in which a plurality of sets of multiphase coils are wound around a plurality of slots provided in a stator.
- a coil of each phase is formed by connecting a plurality of coil sides, and each one coil side is selected from a plurality of different in-phase coils and wound in the same slot,
- the divided coil sides are distributed in at least two but not all of the range obtained by dividing the entire circumference of the stator by the number of pole pairs, and are distributed inside and outside the slot. It is characterized by being arranged.
- the plurality of divided coil sides are characterized in that the same phase coil sides of a plurality of sets of multiphase coils are wound in the same slot.
- the plurality of divided coil sides include a small coil side and a large coil side, and the small coil side is wound between two slots sandwiching a predetermined number of teeth of the stator.
- the large coil side is wound between two slots sandwiching the small coil side.
- the stator has 54 slots, and the multi-phase coil includes six sets of three-phase coils.
- the plurality of divided coil sides are arranged in a distributed manner in slots facing each other in the circumferential direction of the stator.
- the present invention provides a rotating electrical machine apparatus including the rotating electrical machine according to any one of the above, wherein a plurality of sets of multiphase coils of the rotating electrical machine are independently driven by separate servo amplifiers. It is characterized by.
- the in-phase coils of the plurality of sets of multi-phase coils are independently driven by in-phase current from separate servo amplifiers.
- the present invention in order to avoid an increase in the number of slots, even when a large number of coils are wound around the same slot, the difference in inductance between the plurality of coils can be suppressed.
- FIG. 1 is a configuration diagram of a rotating electrical machine apparatus according to an embodiment of the present invention.
- 10A to 10F are servo amplifiers
- 60 is a stator of a rotating electrical machine
- 61A and 61D are three-phase coils
- UA and UD are U-phase coils
- VA and VD are V-phase coils
- WA and WD are W-phase coils.
- the three-phase coils 61A to 61F are fed from the servo amplifiers 10A to 10F.
- (UA) (VA) (WA) of the servo amplifier 10A is a power supply terminal
- (UD) (VD) (WD) of the servo amplifier 10D is a power supply terminal.
- the three-phase coil 61A is composed of three-phase coils UA, VA, WA that are Y-shaped at the neutral point (NA), and 61D is a three-phase coil that is Y-shaped at the neutral point (ND) It consists of UD, VD, and WD.
- Other three-phase coils (61B, 61C, 61E, 61F) not shown are also configured by Y-shaped connection at neutral points in the same manner as described above.
- the stator 20 of the rotating electrical machine is provided with six sets of three-phase coils composed of U-phase, V-phase, and W-phase, and each set is driven separately by different servo amplifiers. That is, the three-phase coil 61A is supplied with power from the terminals (UA) (VA) (WA) of the servo amplifier 10A, and the three-phase coil 61D is supplied with power from the terminals (UD) (VD) (WD) of the servo amplifier 10D. In addition, other sets of three-phase coils (not shown) are also separately supplied with power.
- each phase coil of the three-phase coil is further divided into three coil sides.
- the U-phase coil UA of the three-phase coil 61A is divided into coil sides UA1 to UA3, the V-phase coil UA is divided into coil sides VA1 to VA3, and the W-phase coil WA is divided into coil sides WA1 to WA3.
- the U-phase coil UD of the three-phase coil 61D is divided into coil sides UD1 to UD3, the V-phase coil VD is divided into coil sides VD1 to VD3, and the W-phase coil WD is divided into coil sides WD1 to WD3. .
- each phase coil is divided into three coil sides as described above.
- FIG. 2 is an explanatory view showing the arrangement and connection in the stator of the three-phase coil of the rotating electrical machine.
- FIG. 2 shows a cross section obtained by cutting the stator along a plane perpendicular to a central axis (not shown), and shows a stator having 54 slots used in combination with a rotor (not shown).
- Reference numeral 60 denotes a stator of the rotating electric machine, 1 to 54, slot numbers, 62, teeth formed between the slots, and other corresponding parts shown in FIG.
- the stator 60 is a cylindrical iron core, and 54 slots 1 to 54 extending in the direction along the central axis are arranged on the inner peripheral side, and the protrusions between the slots serve as teeth 62. Individually formed. A coil of each phase of UVW is wound around this tooth 62.
- each phase coil UA, VA, WA of the three-phase coil 61A and each phase coil UD, VD, WD of the three-phase coil 61D will be described.
- the coil side UA1 having one end connected to the output terminal (UA) of the servo amplifier 10A is in the slot 36-33, and the terminal on the slot 33 side is a jumper ( Is connected to the terminal on the slot 37 side of the coil side UA2 located in the slot 37-32, and the terminal on the slot 32 side of this coil side UA2 is connected to the coil side located in the slot 10-5 by a jumper It is connected to a terminal on the slot 10 side of UA3.
- a terminal on the slot 5 side of the coil side UA3 is connected to a neutral point (NA).
- the coil side UA1 is located in the slot 36-33
- the coil side UA2 is located in the slot 37-32
- the coil side UA3 is located in the slot 10-5, and these are connected by a jumper.
- the slot 36-33 and the slot 37-32 are in the same area, and the area and the slot 10-5 are at positions (diagonal positions) facing each other across the central axis of the stator.
- the coil side UA1 is arranged across the two slots (34, 35) on the inlet side (inside) of the slot, and the coil side UA2 is located on the bottom side (outside) of the slot.
- the four slots (33 to 36) are arranged, and the UA 3 is arranged across the four slots (6 to 9) on the bottom side (outside) of the slots.
- the coil side UA1 straddling two slots is a small coil
- the coil sides UA2 and UA3 straddling the four slots are large coils.
- the coil side VA1 whose one end is connected to the output terminal (VA) of the servo amplifier 10A is in the slot 24-21, and the terminal on the slot 21 side. Is connected to the terminal on the slot 25 side of the coil side VA2 located in the slot 25-20 by a crossover (not shown), and the terminal on the slot 20 side of the coil side VA2 is connected to the slot 52-47 by a crossover It is connected to the terminal on the slot 52 side of the coil side VA3 located. The terminal on the slot 47 side of the coil side VA3 is connected to the neutral point (NA).
- NA neutral point
- the coil side VA1 is located in the slot 24-21
- the coil side VA2 is located in the slot 25-20
- the coil side VA3 is located in the slot 52-47, and these are connected by a jumper.
- Slot 24-21 and slot 25-20 are in the same area, and this area and slots 52-47 are at diagonal positions.
- the coil side VA1 is arranged inside the slot and straddling the two slots (22, 23), and the coil side VA2 is arranged outside the slot, and the four slots (21 to 24). ), And VA3 is arranged outside the slot and across four slots (48 to 51).
- the coil side VA1 straddling two slots is a small coil
- the coil side VA2 and coil side VA3 straddling the four slots are large coils.
- the coil side WA1 whose one end is connected to the output terminal (WA) of the servo amplifier 10A is in the slot 30-27, and the terminal on the slot 27 side Is connected to the terminal on the slot 31 side of the coil side WA2 located in the slot 31-26 by a crossover (not shown), and the terminal on the slot 26 side of the coil side WA2 is connected to the slot 4-53 by a crossover. It is connected to the terminal on the slot 4 side of the coil side WA3 located.
- the terminal on the slot 53 side of the coil side WA3 is connected to the neutral point (NA).
- the coil side WA1 is located in the slot 30-27
- the coil side WA2 is located in the slot 31-26
- the coil side WA3 is located in the slot 4-53, and these are connected by a jumper.
- Slot 30-27 and slot 31-26 are in the same area, and this area and slot 4-53 are at diagonal positions.
- the coil side WA1 is arranged inside the slot and straddling the two slots (28, 29), and the coil side WA2 is outside the slot, and the four slots (27 to 30). ) And WA3 is arranged outside the slot and across 4 slots (54 to 3).
- the coil side WA1 straddling two slots is a small coil
- the coil side WA2 and coil side WA3 straddling the four slots are large coils.
- the other three-phase coils 61D are similarly arranged as shown by broken lines in FIG.
- the U-phase coil UD will be described as a representative.
- a coil side UD1 whose one end is connected to the output terminal (UD) of the servo amplifier 10D is in the slot 6-9, and the terminal on the slot 6 side is located in the slot 5-10 by a jumper (not shown).
- the terminal on the slot 10 side of the coil side UD2 is connected, and the terminal on the slot 5 side of the coil side UD2 is connected to the terminal on the slot 37 side of the coil side UD3 located in the slot 37-32 by a jumper.
- a terminal on the slot 32 side of the coil side UD3 is connected to a neutral point (ND).
- the coil side UD1 is located in the slot 6-9
- the coil side UD2 is located in the slot 5-10
- the coil side UD3 is located in the slot 37-32, and these are connected by a jumper.
- Slot 6-9 and slot 5-10 are in the same area, and this area and slot 37-32 are at diagonal positions.
- the coil side UD1 is arranged outside the slot and straddling the two slots (7, 8), and the coil side UD2 is arranged inside the slot, and the four slots (6 to 9).
- UD3 is arranged across the four slots (33 to 36) inside the slot.
- the coil side UD1 straddling two slots is a small coil
- the coil side UD2 and coil side UD3 straddling the four slots are large coils.
- FIG. 3 is an explanatory diagram showing the positions of the coil pieces of each of the plural sets of UVW shown in FIG.
- the horizontal axis shows three divided coil sides (coil sides 1, 2, and 3), and the vertical axis shows each set of three-phase coils.
- the three-phase coil two sets of UA, VA, WA and UD, VD, WD are shown, and the others are omitted.
- as an arrangement position of each coil side in the slot “inside” is displayed inside the slot, and “outside” is displayed outside the slot.
- “large” and “small” indicate large and small coils on the coil side
- solid lines and broken lines in the display column indicate types of lines representing the coils shown in FIG.
- the coil side UA1 is a small coil disposed inside the slot 36-33
- the coil side UA2 is a large coil disposed outside the slot 37-32
- the coil side UA3 is A large coil is placed outside the slot 10-5.
- the arrangement positions of the coil sides of the three-phase coils VA and WA are shown.
- the coil side UD1 is a small coil disposed outside the slot 9-6
- the coil side UD2 is a large coil disposed inside the slot 10-5
- the coil side UD3 is large.
- a coil is placed inside slots 37-32.
- the arrangement positions of the coil sides of the three-phase coils VD and WD are shown.
- FIG. 4 is an explanatory diagram of the coil arrangement of the rotating electric machine, and shows the arrangement position of a plurality of sets of three-phase coils in the stator.
- each phase coil of each set of three-phase coils is sequentially arranged in the circumferential direction of the stator, and in-phase coils (coil sides) are paired at diagonal positions across the center of the stator. Has been placed. If the in-phase coils are arranged as a pair at diagonal positions, the thermal influence on the entire in-phase coil can be reduced even if the thermal conditions of the rotating electrical machine change.
- the thermal influence can be reduced in the entire in-phase coil.
- the coil sides are concentrated in an area where the coils of the same phase are located, when this area is heated, the coils of the entire phase are heated, while the temperature difference between the coils of the other phases with less thermal influence is increased. Increases, and there is a possibility that a difference occurs in coil characteristics (inductance, resistance value, etc.), resulting in imbalance in the control of the rotating electrical machine.
- a plurality of sets of in-phase coils are multiplexed and arranged in the same area of the stator. That is, if the in-phase coil is a U-phase, the coil sides UD1 and UD2 (both are broken lines) of the U-phase coil of the three-phase coil 61D and the coil sides UA3 of the other three-phase coils 61A are slots in the same area. The coil sides UA1, UA2 and the coil side UD3 (broken line) are arranged in slots in the same area of the slots 37-32. For this reason, many coils can be wound around the same area without increasing the number of slots.
- the coil sides of the coils of each phase are arranged at different positions along the circumferential direction of the stator 60 and are distributed on the inner side and the outer side of the stator slots with respect to the same phase. Therefore, the difference in inductance of the coils between the phases can be reduced, and the difference in inductance between the plurality of sets of three-phase coils can also be suppressed.
- the three coil sides are divided into two and one on the inside and outside of the slot, but the three coil sides are placed at one place (only inside or only outside) of the slot.
- the balance is changed from 3: 0 to 2: 1 and can be made closer to equal.
- the inductance and resistance values of the coil have a large value as a base, and a balance element is added to these values, so that the balance in terms of the actual inductance and resistance values is equally close.
- the number of coil sides of each phase coil is increased from 2 to 4 or the like, the coil sides can be distributed to a larger number of positions in the slot, so that it becomes easier to balance.
- each phase coil is configured to include the coil sides of the large coil and the small coil by arranging the coil sides dispersed inside and outside the slot. The difference in the average winding diameter of the coil can be reduced, and the difference between the coil inductance and the resistance value can be suppressed.
- a 54-slot motor is described. However, it is generally applicable to a multiphase motor, and is not limited to this.
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- Windings For Motors And Generators (AREA)
Abstract
Description
各相のコイルが各々複数のコイル辺を連結されてなり、複数個の異なる同相コイルから各ひとつの該コイル辺を選択して同一スロットに巻回し、
前記分割されたコイル辺は、前記固定子全周を極対数で分割した範囲の、少なくとも2つ以上でかつ全てではない範囲に分散して配置されると共に、前記スロットの内側と外側に分散して配置されることを特徴とする。
Claims (7)
- 固定子に設けられた複数スロットに複数組の多相コイルが巻線された回転電機において、
各相のコイルが各々複数のコイル辺を連結されてなり、複数個の異なる同相コイルから各ひとつの該コイル辺を選択して同一スロットに巻回し、
前記分割されたコイル辺は、前記固定子全周を極対数で分割した範囲の、少なくとも2つ以上でかつ全てではない範囲に分散して配置されると共に、前記スロットの内側と外側に分散して配置されることを特徴とする回転電機。 - 請求項1に記載の回転電機において、
分割された複数のコイル辺は、複数組の多相コイルの同一相のコイル辺が同一スロットに巻回されていることを特徴とする回転電機。 - 請求項1または2に記載の回転電機において、
分割された複数のコイル辺は小コイル辺と大コイル辺からなり、小コイル辺は前記固定子の所定個数のティースを挟む2つのスロット間に巻回され、前記大コイル辺は前記小コイル辺を挟む2つのスロット間に巻回されたことを特徴とする回転電機。 - 請求項1~3のいずれかに記載の回転電機において、
前記固定子は54個のスロットを有し、前記多相コイルは6組の3相コイルからなることを特徴とする回転電機。 - 請求項1~4のいずれかに記載の回転電機において、
前記分割された複数のコイル辺は、前記固定子の周方向で対向する位置のスロットに分散して配置されたことを特徴とする回転電機。 - 請求項1~5のいずれかに記載の回転電機を備えた回転電機装置において、前記回転電機の複数組の多相コイルは、別個のサーボアンプによって独立に駆動されることを特徴とする回転電機装置。
- 請求項6に記載の回転電機装置において、前記複数組の多相コイルの同相コイルには、別個のサーボアンプから同相電流で独立に駆動されることを特徴とする回転電機装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2013546938A JP5822947B2 (ja) | 2011-12-02 | 2011-12-02 | 回転電機 |
CN201180072333.XA CN103650297B (zh) | 2011-12-02 | 2011-12-02 | 旋转电机和旋转电机装置 |
PCT/JP2011/077948 WO2013080377A1 (ja) | 2011-12-02 | 2011-12-02 | 回転電機及び回転電機装置 |
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PCT/JP2011/077948 WO2013080377A1 (ja) | 2011-12-02 | 2011-12-02 | 回転電機及び回転電機装置 |
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Cited By (1)
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WO2015102840A1 (en) * | 2013-12-30 | 2015-07-09 | Google Inc. | Winding technique for minimizing voltage stress in a motor |
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DE102018105129A1 (de) * | 2018-03-06 | 2019-09-12 | Gkn Sinter Metals Engineering Gmbh | Verfahren zum Betreiben eines elektrischen Motors |
Citations (5)
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JPH09121491A (ja) * | 1995-08-18 | 1997-05-06 | Toshiba Corp | 回転電機の電機子巻線及びその製造方法 |
JP2004282858A (ja) * | 2003-03-14 | 2004-10-07 | Hitachi Ltd | 固定子及びそれを用いた回転機 |
JP2009254135A (ja) * | 2008-04-07 | 2009-10-29 | Toshiba Industrial Products Manufacturing Corp | 回転電機の固定子および回転電機 |
JP2010130821A (ja) * | 2008-11-28 | 2010-06-10 | Hitachi Ltd | 回転電機の巻線構造及びその回転電機の駆動システム |
JP2011199933A (ja) * | 2010-03-17 | 2011-10-06 | Toyota Industries Corp | 回転電機のステータ |
Family Cites Families (1)
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CN102025248B (zh) * | 2009-09-18 | 2014-03-12 | 德昌电机(深圳)有限公司 | 用于电动交通工具的动力系统的电机 |
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2011
- 2011-12-02 CN CN201180072333.XA patent/CN103650297B/zh not_active Expired - Fee Related
- 2011-12-02 JP JP2013546938A patent/JP5822947B2/ja not_active Expired - Fee Related
- 2011-12-02 WO PCT/JP2011/077948 patent/WO2013080377A1/ja active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH09121491A (ja) * | 1995-08-18 | 1997-05-06 | Toshiba Corp | 回転電機の電機子巻線及びその製造方法 |
JP2004282858A (ja) * | 2003-03-14 | 2004-10-07 | Hitachi Ltd | 固定子及びそれを用いた回転機 |
JP2009254135A (ja) * | 2008-04-07 | 2009-10-29 | Toshiba Industrial Products Manufacturing Corp | 回転電機の固定子および回転電機 |
JP2010130821A (ja) * | 2008-11-28 | 2010-06-10 | Hitachi Ltd | 回転電機の巻線構造及びその回転電機の駆動システム |
JP2011199933A (ja) * | 2010-03-17 | 2011-10-06 | Toyota Industries Corp | 回転電機のステータ |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015102840A1 (en) * | 2013-12-30 | 2015-07-09 | Google Inc. | Winding technique for minimizing voltage stress in a motor |
US9621003B2 (en) | 2013-12-30 | 2017-04-11 | X Development Llc | Winding technique for minimizing voltage stress in a motor |
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JPWO2013080377A1 (ja) | 2015-04-27 |
JP5822947B2 (ja) | 2015-11-25 |
CN103650297A (zh) | 2014-03-19 |
CN103650297B (zh) | 2016-04-20 |
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