WO2023026499A1 - 回転電機の回転子、回転電機 - Google Patents
回転電機の回転子、回転電機 Download PDFInfo
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- WO2023026499A1 WO2023026499A1 PCT/JP2021/031616 JP2021031616W WO2023026499A1 WO 2023026499 A1 WO2023026499 A1 WO 2023026499A1 JP 2021031616 W JP2021031616 W JP 2021031616W WO 2023026499 A1 WO2023026499 A1 WO 2023026499A1
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- magnet
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- 238000012986 modification Methods 0.000 description 21
- 230000004048 modification Effects 0.000 description 21
- 230000000694 effects Effects 0.000 description 20
- 239000004065 semiconductor Substances 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 14
- 230000004907 flux Effects 0.000 description 8
- 238000004804 winding Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Definitions
- patent document 1 discloses a lamination A rotor is disclosed that utilizes two layers of magnets in the stack, with an inner layer located near the rotor and composed of large magnets, and an outer layer located near the outer laminated stack surface and composed of small magnets.
- FIG. 1 is a diagram showing a schematic configuration of a hybrid electric vehicle equipped with a rotating electric machine according to one embodiment of the present invention.
- Rotational torque generated by engine 120 and rotating electric machines 200 and 202 is transmitted to front wheels 110 via transmission 130 and differential gear 160 .
- Transmission 130 is controlled by transmission controller 134 and engine 120 is controlled by engine controller 124 .
- Battery 180 is controlled by battery controller 184 .
- Transmission control device 134 , engine control device 124 , battery control device 184 , power conversion device 600 and integrated control device 170 are connected by communication line 174 .
- FIG. 2 is an electric circuit diagram of the power converter of FIG.
- the power conversion device 600 is provided with a first inverter device for the rotating electrical machine 200 and a second inverter device for the rotating electrical machine 202 .
- the first inverter device includes a power module 610, a first drive circuit 652 that controls the switching operation of each power semiconductor 21 of the power module 610, and a current sensor 660 that detects the current of the rotary electric machine 200.
- the drive circuit 652 is provided on the drive circuit board 650 .
- the second inverter device includes a power module 620, a second drive circuit 656 that controls the switching operation of each power semiconductor 21 in the power module 620, and a current sensor 662 that detects the current of the rotary electric machine 202. I have.
- the drive circuit 656 is provided on the drive circuit board 654 .
- a control circuit 648 provided on a control circuit board 646, a capacitor module 630, and a transmitting/receiving circuit 644 mounted on a connector board 642 are commonly used by the first inverter device and the second inverter device.
- an IGBT (insulated gate bipolar transistor) 21 is used as a switching power semiconductor element.
- the IGBT 21 has three electrodes, a collector electrode, an emitter electrode and a gate electrode.
- a diode 38 is electrically connected between the collector electrode and the emitter electrode of the IGBT 21 .
- the diode 38 has two electrodes, a cathode electrode and an anode electrode. They are electrically connected to emitter electrodes, respectively.
- Drive circuits 652 and 656 constitute a drive section for controlling corresponding inverter devices 610 and 620, and generate a drive signal for driving IGBT 21 based on a control signal output from control circuit 648. do.
- Drive signals generated by respective drive circuits 652 and 656 are output to gates of respective power semiconductor elements of corresponding power modules 610 and 620, respectively.
- the drive circuits 652 and 656 are each provided with six integrated circuits for generating drive signals to be supplied to the gates of the upper and lower arms of each phase, and the six integrated circuits constitute one block.
- a transmitting/receiving circuit 644 mounted on the connector board 642 is for electrically connecting between the power conversion device 600 and an external control device, and communicates information with other devices via the communication line 174 in FIG. Send and receive.
- the capacitor module 630 constitutes a smoothing circuit for suppressing fluctuations in the DC voltage caused by the switching operation of the IGBT 21 . connected in parallel.
- FIG. 3 is a cross-sectional view of the rotating electric machine in FIG.
- FIG. 4 is a cross-sectional view of the rotor core and stator core of FIG. 3 taken along the line AA.
- the stator core shown in FIG. 4 is composed of, for example, 8 poles (4 pole pairs) and 48 slots, but the number of slots and the number of poles are not limited thereto. Also, the number of cores is not limited and the present invention can be applied.
- a stator 230 is held inside the housing 212 , and the stator 230 includes a stator core 232 and stator windings 238 .
- a rotor 280 is rotatably held on the inner peripheral side of the stator core 232 via a gap 222 .
- the rotor 280 includes a rotor core 282 fixed to the shaft 218, permanent magnets 284, and a cover plate 226 of non-magnetic material.
- Housing 212 has a pair of end brackets 214 provided with bearings 216, and shaft 218 is rotatably held by these bearings 216.
- the rotor core 282 has a plurality of magnet holes 3, which are air gaps, into which a plurality of magnets 2 are inserted.
- the shaft 218 is provided with a resolver 224 that detects the pole position and rotational speed of the rotor 280 .
- the output from this resolver 224 is taken into the control circuit 648 shown in FIG.
- Control circuit 648 outputs a control signal to drive circuit 652 based on the captured output.
- Drive circuit 652 outputs a drive signal based on the control signal to power module 610 .
- Power module 610 performs a switching operation based on a control signal to convert DC power supplied from battery 180 into three-phase AC power. This three-phase AC power is supplied to the stator winding 238 shown in FIG. 3, and a rotating magnetic field is generated in the stator 230.
- the frequency of the three-phase alternating current is controlled based on the output value of the resolver 224, and the phase of the three-phase alternating current with respect to the rotor 280 is similarly controlled based on the output value of the resolver 224.
- FIG. 5 is a partially enlarged view of the rotor of the rotating electric machine according to one embodiment of the present invention.
- the magnets 2 inserted into the plurality of gaps of the rotor core 282 are a pair of first magnets 2a inserted into a pair of magnet holes 3 formed in a V shape radially outward, and the first magnets 2a. and a pair of second magnets 2b respectively inserted into a pair of magnet holes 3 formed in a V-shape radially inwardly of the magnet hole.
- the d-axis 4, d-axis 4, A q-axis 5 is defined respectively.
- the magnet hole 3 is a combination of two V shapes (double V shape) as described above is that the effective portion of the gap magnetic flux density in the air gap 222 is increased and the ineffective portion is increased compared to the single V shape. This is because there is a benefit in terms of output torque. Therefore, by adopting the double V shape for the magnet arrangement of the rotor 280 as in the rotary electric machine 200 of the present embodiment, it is possible to obtain the advantage of being able to reduce the amount of magnets and the physical size as compared with the conventional single V shape. .
- the formation positions of the magnets 2 and the magnet holes 3 must be considered.
- the distance 4a from the d-axis 4 to the end of the first magnetic gap 3a is the distance from the d-axis 4 to the second magnet 2b. It is formed longer than the distance 4b to the end on the outermost diameter side.
- FIG. 6 shows the result (torque state) of verifying the effect of 3c ⁇ 3d.
- 4a>4b and 2c>2d Four patterns are prepared for effect verification, and a graph 6a of 3c ⁇ 3d, a graph 6b of 3c ⁇ 3d, a graph 6c of 3c ⁇ 3d, and a graph 6d of 3c>3d are illustrated, respectively. From this, it can be seen that if 3c ⁇ 3d, 3c ⁇ 3d, the torque ripple is smaller than 3c ⁇ 3d or 3c > 3d. It was found that the torque ripple can be suppressed by
- FIG. 9 is a diagram showing the simulation results of the magnetic flux in the rotor and stator for verifying the effect of angle 2c>angle 2d.
- FIG. 9(a) shows the condition of angle 2c ⁇ angle 2d
- FIG. 9(b) shows the condition of angle 2c ⁇ angle 2d
- FIG. 9(c) shows the condition of angle 2c>angle 2d. Illustrated.
- FIG. 9(a) there is a wide magnetic path on the inner diameter side of the rotor, and if the rotor core portion does not reach this range, the torque will decrease. If the range of the magnetic path on the inner diameter side of is suppressed, a high torque can be achieved with a small number of rotor cores.
- FIG. 10 is a first modified example of the present invention.
- FIG. 11(a) is a second modified example of the present invention
- FIG. 11(b) is a third modified example.
- an additional gap (third magnetic gap 3f) is provided between the first magnetic gap 3a and the second magnetic gap 3b.
- a bridge portion 3g is provided between the first magnetic gap 3a and the third magnetic gap 3f and between the second magnetic gap 3b and the third magnetic gap 3f. By doing so, the path of the magnetic flux in the bridge portion 3g becomes narrower, and the torque ripple reduction effect is realized.
- the shape of the third magnetic air gap 3f may be any shape as long as it has the bridge portion 3g.
- FIG. 12A is the fourth modification of the present invention
- FIG. 12B is the fifth modification
- FIG. 12C is the sixth modification.
- the first magnet 2a is not V-shaped, the magnet hole 3 into which the first magnet 2a is inserted is continuous, and the angle 2c (see FIG. 5) is set to 180°. It can be the first magnet 2a. This can have the same effect as the arrangement of the double V-shaped magnets 2 .
- FIGS. 14(a) and 14(b) are the ninth and tenth modified examples of the present invention, respectively.
- the first magnet 2a and the second magnet 2b are divided in the vertical direction (axial direction) with respect to the long sides of the examples used in FIGS. 5 and 12(a), respectively. is.
- the heat generation of the magnets can be suppressed, the demagnetization resistance can be increased, and the torque ripple reduction effect can be the same as that of the other embodiments.
- the cross section of each magnet division is, for example, a cross section in a direction perpendicular to the axial direction (parallel to the paper surface), the heat generated by the magnet can be suppressed, and if the fixation of the magnet can be secured, any Such a division method may be used.
- the magnet characteristics such as the residual magnetic flux density and the coercive force of the first magnet 2a, the second magnet 2b and the third magnet 2e may be the same, and the reverse magnetic field from the stator may be applied to each of them. are different, the materials may be changed to have the required coercive force. By doing so, it is possible to reduce the magnet cost and manufacture a more inexpensive rotary electric machine.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
図1は、本発明の一実施形態の回転電機を搭載したハイブリッド型電気自動車の概略構成を示す図である。
2a 第1磁石
2b 第2磁石
2c 第1磁石のV字の内側の角度の大きさ
2d 第2磁石のV字の内側の角度の大きさ
2e 第3磁石
3 磁石孔
3a 第1磁気的空隙
3b 第2磁気的空隙
3c 第1磁気的空隙と第2磁気的空隙との間の距離
3d 隣接する第2磁気的空隙同士との間の距離
3e 第2磁気的空隙の凸形状
3f 第3磁気的空隙
3g 第3磁気的空隙のブリッジ部
3h 第2磁気的空隙(内周側)
3i 第4磁気的空隙
4 d軸
4a 第1磁気的空隙のd軸から最も離れている点までの距離
4b 第2磁石の径方向外側に対向する角部までの距離
5 q軸
100 車両
200 回転電機
280 回転子
282 回転子コア
600 電力変換装置
Claims (5)
- 磁石と、前記磁石が挿入されている磁石孔と、を備える回転電機の回転子であって、
前記磁石は、V形状に配置される一対の第1磁石と、前記第1磁石よりも径方向内側にV形状に配置される一対の第2磁石と、を含み、
前記磁石孔には、前記第1磁石を間にしてd軸と対向する第1磁気的空隙と、前記第2磁石を間にして前記d軸と対向する第2磁気的空隙と、が形成され、
前記d軸に対して垂直方向に見たときに、前記d軸から前記第1磁気的空隙の端部までの距離は、前記d軸から前記第2磁石のうち最も外径側の端部までの距離よりも長く形成され、
最も外径側において、前記第1磁気的空隙と前記第2磁気的空隙との間の距離は、複数の磁極において隣接する前記第2磁気的空隙の間の距離よりも短く、
前記一対の第1磁石によって形成される前記V形状の内角の大きさは、前記一対の第2磁石によって形成される前記V形状の内角の大きさよりも大きい
回転電機の回転子。 - 請求項1に記載の回転電機の回転子であって、
前記第1磁石が挿入されている前記磁石孔は、前記d軸を間に挟んで一続きで形成されており、
前記一対の第1磁石は、一続きで形成されている
回転電機の回転子。 - 請求項1または請求項2に記載の回転電機の回転子であって、
前記第1磁気的空隙と前記第2磁気的空隙との間には、空隙が形成されている
回転電機の回転子。 - 請求項1または請求項2に記載の回転電機の回転子であって、
前記一対の第2磁石がそれぞれ挿入されている前記磁石孔同士の間の位置に、第3磁石が設けられている
回転電機の回転子。 - 請求項1から4のいずれかに記載の回転電機の回転子を備えた
回転電機。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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CN202180097750.3A CN117280569A (zh) | 2021-08-27 | 2021-08-27 | 旋转电机的转子以及旋转电机 |
JP2023543634A JPWO2023026499A1 (ja) | 2021-08-27 | 2021-08-27 | |
PCT/JP2021/031616 WO2023026499A1 (ja) | 2021-08-27 | 2021-08-27 | 回転電機の回転子、回転電機 |
DE112021007306.0T DE112021007306T5 (de) | 2021-08-27 | 2021-08-27 | Rotor für rotierende elektrische maschine und rotierende elektrische maschine |
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PCT/JP2021/031616 WO2023026499A1 (ja) | 2021-08-27 | 2021-08-27 | 回転電機の回転子、回転電機 |
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CN (1) | CN117280569A (ja) |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018148597A (ja) * | 2017-03-01 | 2018-09-20 | ダイキン工業株式会社 | 回転電気機械 |
WO2020027338A1 (ja) * | 2018-08-03 | 2020-02-06 | 株式会社 東芝 | 回転電機の回転子 |
JP2020137139A (ja) * | 2019-02-12 | 2020-08-31 | トヨタ自動車株式会社 | 回転電機 |
WO2021106395A1 (ja) * | 2019-11-26 | 2021-06-03 | 株式会社安川電機 | 回転電機、回転子及び電磁鋼板 |
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US20200127508A1 (en) | 2018-10-23 | 2020-04-23 | Atieva, Inc. | Low Cogging Torque, High Torque Density Traction Motor |
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- 2021-08-27 WO PCT/JP2021/031616 patent/WO2023026499A1/ja active Application Filing
- 2021-08-27 JP JP2023543634A patent/JPWO2023026499A1/ja active Pending
- 2021-08-27 DE DE112021007306.0T patent/DE112021007306T5/de active Pending
- 2021-08-27 CN CN202180097750.3A patent/CN117280569A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2018148597A (ja) * | 2017-03-01 | 2018-09-20 | ダイキン工業株式会社 | 回転電気機械 |
WO2020027338A1 (ja) * | 2018-08-03 | 2020-02-06 | 株式会社 東芝 | 回転電機の回転子 |
JP2020137139A (ja) * | 2019-02-12 | 2020-08-31 | トヨタ自動車株式会社 | 回転電機 |
WO2021106395A1 (ja) * | 2019-11-26 | 2021-06-03 | 株式会社安川電機 | 回転電機、回転子及び電磁鋼板 |
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CN117280569A (zh) | 2023-12-22 |
DE112021007306T5 (de) | 2024-01-25 |
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