CN105048671A - Asymmetric V-shaped rotor punching sheet and built-in permanent-magnetic motor using the same - Google Patents

Asymmetric V-shaped rotor punching sheet and built-in permanent-magnetic motor using the same Download PDF

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Publication number
CN105048671A
CN105048671A CN201510509200.4A CN201510509200A CN105048671A CN 105048671 A CN105048671 A CN 105048671A CN 201510509200 A CN201510509200 A CN 201510509200A CN 105048671 A CN105048671 A CN 105048671A
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China
Prior art keywords
permanent magnet
asymmetric
rotor
rotor punching
magnetic bridge
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Pending
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CN201510509200.4A
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Chinese (zh)
Inventor
任武
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WUHAN MAXSINE ELECTRIC CO Ltd
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WUHAN MAXSINE ELECTRIC CO Ltd
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Priority to CN201510509200.4A priority Critical patent/CN105048671A/en
Publication of CN105048671A publication Critical patent/CN105048671A/en
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Abstract

The invention discloses an asymmetric V-shaped rotor punching sheet and a built-in permanent-magnetic motor using the same. A stator iron core, a stator winding, and a rotor iron core are arranged. The stator winding employs the single-layer distribution winding and the pitch is four. The rotor iron core includes a center shaft, a plurality of groups of permanent magnets arranged at the periphery of the center shaft, and magnetism isolating bridges connected to the two ends of the permanent magnets; the permanent magnets are asymmetric V-shaped rotor punching sheets formed by connection of first permanent magnets and second permanent magnets; the magnetism isolating bridges contains first magnetism isolating bridges and second magnetism isolating bridges, and the first magnetism isolating bridges are connected with the first permanent magnets and the second magnetism isolating bridges are connected with the second permanent magnets. According to the built-in permanent-magnetic motor using the asymmetric V-shaped rotor punching sheets, the counter-electromotive-force harmonic wave can be inhibited; and the cogging torque of the built-in permanent-magnetic motor can be reduced obviously and the torque pulse can be reduced. Moreover, the structure is simple, the operation is convenient, the flexibility and reliability are high, and the cost is low; and the defects in the prior art can be effectively overcome.

Description

A kind of asymmetric V-type rotor punching and use its interior permanent magnet machines
Technical field
The present invention relates to the electric rotating machine with permanent magnet, particularly relate to a kind of asymmetric V-type rotor punching and use its interior permanent magnet machines.
Background technology
High torque density and high efficiency magneto have been widely used in the fields such as Aero-Space, Digit Control Machine Tool, robot, electric automobile.Different in the position of rotor according to permanent magnet, magneto is divided into surface-mounted permanent magnet machine (SPM) and interior permanent magnet machines (IPM), and wherein the torque of interior permanent magnet machines comprises permanent-magnet torque and reluctance torque.Permanent-magnet torque is interacted by rotor permanent magnet magnetic field and stator field and produces, and reluctance torque is by stator field and has saliency rotor and produced.Therefore, when other are consistent, interior permanent magnet machines has higher power density and efficiency.Just because of this architectural feature of rotor, interior permanent magnet machines has higher cogging torque and torque pulsation, but torque pulsation not only causes motor oscillating, produces noise, and affects the even running of motor.
The common method reducing the torque pulsation of interior permanent magnet machines in existing technology is skewed stator slot technology.But this technology also has some shortcomings being difficult to overcome simultaneously.Adopt skewed stator slot, winding overhang is elongated, and end effect strengthens, and copper loss loss increases, and electric efficiency reduces, enamelled wire cost increase etc.Rotor segment tiltedly can effectively reduce torque pulsation extremely equally, but adopts the oblique pole of segmentation, increases interelectrode magnetic leakage, also makes the technique of motor become complicated.In addition, skewed slot and the oblique pole of segmentation can produce axial out-of-balance force, damage bearing.
Therefore, be necessary to provide a kind of new technical scheme, can reach and reduce costs, technique effect easy to use.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide a kind of asymmetric V-type rotor punching and uses its interior permanent magnet machines, significantly can reduce the cogging torque of interior permanent magnet machines and reduce torque pulsation.
For achieving the above object, the invention provides a kind of asymmetric V-type rotor punching and use its interior permanent magnet machines, it is characterized in that: comprise stator core, stator winding, rotor core; Described stator winding adopts monolayer distribution winding, and pitch is four; Described rotor core comprises central shaft, and is arranged on many groups permanent magnet of central shaft periphery, and be connected to permanent magnet two ends every magnetic bridge; Described permanent magnet is the asymmetric V-type rotor punching that the first permanent magnet and the second permanent magnet connect to form, describedly comprise first every magnetic bridge and second every magnetic bridge every magnetic bridge, described first is connected with the first permanent magnet every magnetic bridge, and described second is connected with the second permanent magnet every magnetic bridge.
Above-mentioned a kind of asymmetric V-type rotor punching and use its interior permanent magnet machines, is characterized in that: described first permanent magnet is identical with the shape of the second permanent magnet.
Above-mentioned a kind of asymmetric V-type rotor punching and use its interior permanent magnet machines, it is characterized in that: described first permanent magnet is rotated counterclockwise, is θ with datum line OD angle 2, the second permanent magnet is rotated counterclockwise, and is θ with datum line OD angle 3, θ 2< θ 3.
Above-mentioned a kind of asymmetric V-type rotor punching and use its interior permanent magnet machines, it is characterized in that: described second is not identical every magnetic bridge shape with first every magnetic bridge, second is greater than first every magnetic bridge width every magnetic bridge width.
Above-mentioned a kind of asymmetric V-type rotor punching and use its interior permanent magnet machines, it is characterized in that: described rotor core is divided into two parts, adopt same rotor punching, Part I rotor is that core lamination faces up and is overrided to form, and Part II rotor is that the core lamination back side is upwards overrided to form.
Above-mentioned a kind of asymmetric V-type rotor punching and use its interior permanent magnet machines, is characterized in that: described θ 2=65 °, θ 3=70 °.
Above-mentioned a kind of asymmetric V-type rotor punching and use its interior permanent magnet machines, is characterized in that: the axial length adjustable of described Part I rotor and Part II rotor.
Above-mentioned a kind of asymmetric V-type rotor punching and use its interior permanent magnet machines, is characterized in that: the axial length of described Part I rotor and Part II rotor is than being 0.8-1.2.
The invention has the beneficial effects as follows:
1, the stator winding of interior permanent magnet machines of the present invention adopts monolayer distribution winding, can effectively suppress back-emf harmonic wave;
2, built-in permanent magnet motor rotor of the present invention adopts asymmetric V-type rotor punching, rotor core is divided into two parts, adopt same rotor punching, Part I rotor is that core lamination faces up and is overrided to form, and Part II rotor is the core lamination back side is upwards overrided to form, the axial length adjustable of Part I rotor and Part II rotor, significantly can reduce the cogging torque of interior permanent magnet machines and reduce torque pulsation;
3, structure of the present invention is simple, easy to operate, flexibility is good, reliability is high, cost is lower, efficiently solves the deficiencies in the prior art.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the interior permanent magnet machines stator Facad structure schematic diagram of reference example;
Fig. 2 is the built-in permanent magnet motor rotor Facad structure schematic diagram of reference example;
Fig. 3 is the built-in permanent magnet motor rotor punching front schematic view of the embodiment of the present invention;
Fig. 4 is the built-in permanent magnet motor rotor punching schematic rear view of the embodiment of the present invention;
Fig. 5 is the rotor schematic perspective view of the embodiment of the present invention;
Fig. 6 is reference example and embodiment of the present invention interior permanent magnet machines cogging torque comparison diagram;
Fig. 7 is reference example and embodiment of the present invention interior permanent magnet machines instantaneous torque comparison diagram.
Embodiment
As Figure 1-4, a kind of asymmetric V-type rotor punching and use its interior permanent magnet machines, is characterized in that: comprise stator core 1, stator winding 2, rotor core 3; Described stator winding 2 adopts monolayer distribution winding, and pitch is four; Described rotor core 3 comprises central shaft 31, and is arranged on many groups permanent magnet 32 of central shaft 31 periphery, and be connected to permanent magnet 32 two ends every magnetic bridge 33; Described permanent magnet 32 is the asymmetric V-type rotor punching that the first permanent magnet 321 and the second permanent magnet 322 connect to form, describedly comprise first every magnetic bridge 331 and second every magnetic bridge 332 every magnetic bridge 33, described first is connected with the first permanent magnet 321 every magnetic bridge 331, and described second is connected with the second permanent magnet 322 every magnetic bridge 332.
The present invention take number of pole-pairs as P=4, and stator slot is the interior permanent magnet machines of Z=36 is that example is illustrated, but is not limited to this pole slot fit.
Fig. 2 is the interior permanent magnet machines front section view of reference example.Stator winding 2 adopts three-phase distributed winding, and pitch is 4, adopts star-like connected mode, can effectively suppress back-emf harmonic wave.Rotor is conventional v-shaped structure, it is characterized in that permanent magnet 32 groove is uniformly distributed, every the width of magnetic bridge 33 and the width of permanent magnet 32 completely the same.The v-shaped rotor structure that Fig. 2 shows is full symmetric structure.
Preferably, the angle of two pieces of permanent magnets 32 is 2 θ 1=135 °, θ 1=67.5 °.
Fig. 3 is the built-in permanent magnet motor rotor punching front schematic view of the embodiment of the present invention, and Fig. 4 is the built-in permanent magnet motor rotor punching schematic rear view that the present invention executes example.The rotor of the embodiment of the present invention adopts asymmetric V-type rotor punching, the first permanent magnet 321 in V-type permanent magnet trough is identical with the shape of the second permanent magnet 322, but riding position is different, it is characterized in that: the first permanent magnet 321 turns clockwise, be θ 2 with datum line OD angle, second permanent magnet 322 turns clockwise, and is θ 3, θ 2< θ 3 with datum line OD angle; θ 2+ θ 3=2 θ 1.
Preferably, the first permanent magnet 321 and datum line OD angle theta 2=65 °, the second permanent magnet 322 and datum line OD angle theta 3=70 °.
Two of V-type permanent magnet trough are not identical every magnetic bridge 33 shape, and second is greater than first every magnetic bridge 331 width every magnetic bridge 332 width.
Fig. 5 is the rotor schematic perspective view of this embodiment of the present invention.Asymmetric V-type rotor core 3 is divided into two parts, adopts same rotor punching, but Part I rotor is core lamination faces up and be overrided to form, and Part II rotor to be the core lamination back side be upwards overrided to form.The axial length adjustable of Part I rotor and Part II rotor.
Preferably, axial length is than 0.8 ~ 1.2, and optimal value obtains according to numerical computations.
Fig. 6 is reference example and embodiment of the present invention interior permanent magnet machines cogging torque comparison diagram.In the embodiment of the present invention, the peak-to-peak value of cogging torque is only 0.872Nm; And in reference example, the peak-to-peak value of cogging torque is up to 0.118Nm.Therefore, after adopting technology of the present invention, cogging torque reduces effectively.
Fig. 7 is reference example and embodiment of the present invention interior permanent magnet machines instantaneous torque comparison diagram.In the embodiment of the present invention, torque pulsation is only 4.11%; And in reference example, torque pulsation is up to being 11.97%.Therefore, after adopting technology of the present invention, torque pulsation significantly reduces.
Embodiments of the invention are not limited to the pole slot fit of 8/36, are also applicable to other pole slot fit.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technical staff in the art, all should by the determined protection range of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.

Claims (8)

1. asymmetric V-type rotor punching and use its a interior permanent magnet machines, is characterized in that: comprise stator core (1), stator winding (2), rotor core (3); Described stator winding (2) adopts monolayer distribution winding, and pitch is four; Described rotor core (3) comprises central shaft (31), with the many groups permanent magnet (32) being arranged on central shaft (31) periphery, and be connected to permanent magnet (32) two ends every magnetic bridge (33); Described permanent magnet (32) is the asymmetric V-type rotor punching that the first permanent magnet (321) and the second permanent magnet (322) connect to form, describedly comprise first every magnetic bridge (331) and second every magnetic bridge (332) every magnetic bridge (33), described first is connected with the first permanent magnet (321) every magnetic bridge (331), and described second is connected with the second permanent magnet (322) every magnetic bridge (332).
2. a kind of asymmetric V-type rotor punching as claimed in claim 1 and use its interior permanent magnet machines, is characterized in that: described first permanent magnet (321) is identical with the shape of the second permanent magnet (322).
3. a kind of asymmetric V-type rotor punching as claimed in claim 1 and use its interior permanent magnet machines, is characterized in that: described first permanent magnet (321) is rotated counterclockwise, and is θ with datum line OD angle 2, the second permanent magnet (322) is rotated counterclockwise, and is θ with datum line OD angle 3, θ 2< θ 3.
4. a kind of asymmetric V-type rotor punching as claimed in claim 1 and use its interior permanent magnet machines, it is characterized in that: described second is not identical every magnetic bridge (331) shape with first every magnetic bridge (332), second is greater than first every magnetic bridge (331) width every magnetic bridge (332) width.
5. a kind of asymmetric V-type rotor punching as claimed in claim 1 and use its interior permanent magnet machines, it is characterized in that: described rotor core (3) is divided into two parts, adopt same rotor punching, Part I rotor is that core lamination faces up and is overrided to form, and Part II rotor is that the core lamination back side is upwards overrided to form.
6. a kind of asymmetric V-type rotor punching as claimed in claim 3 and use its interior permanent magnet machines, is characterized in that: described θ 2=65 °, θ 3=70 °.
7. a kind of asymmetric V-type rotor punching as claimed in claim 5 and use its interior permanent magnet machines, is characterized in that: the axial length adjustable of described Part I rotor and Part II rotor.
8. a kind of asymmetric V-type rotor punching as claimed in claim 7 and use its interior permanent magnet machines, is characterized in that: the axial length of described Part I rotor and Part II rotor is than being 0.8-1.2.
CN201510509200.4A 2015-08-19 2015-08-19 Asymmetric V-shaped rotor punching sheet and built-in permanent-magnetic motor using the same Pending CN105048671A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105406626A (en) * 2015-12-18 2016-03-16 珠海凌达压缩机有限公司 Motor rotor and motor
CN105449894A (en) * 2016-01-05 2016-03-30 上海特波电机有限公司 Asymmetric permanent magnet motor for new energy automobile
CN105846568A (en) * 2016-03-23 2016-08-10 东南大学 Modularized rotor of outer rotor hub motor
CN105914925A (en) * 2016-05-18 2016-08-31 江苏仪能电机有限公司 High-torque-density permanent magnet reluctance synchronous motor rotor structure
CN106300733A (en) * 2016-08-31 2017-01-04 湖北立锐机电有限公司 Interior permanent magnet machines based on I type rotor structure
CN106357072A (en) * 2016-08-31 2017-01-25 湖北立锐机电有限公司 Spoke-type rotor structure and interior permanent magnet motor adopting same
CN107834733A (en) * 2017-11-24 2018-03-23 江苏大学 A kind of method for reducing by five phase built-in permanent magnetic motor torque ripples
CN107872136A (en) * 2016-09-22 2018-04-03 通用电气公司 Motor
CN109802504A (en) * 2019-04-04 2019-05-24 山东大学 A kind of permanent magnetism magneticfocusing synchronous magnetic resistance motor and its asymmetrical rotor
CN111384799A (en) * 2018-12-27 2020-07-07 现代自动车株式会社 Embedded permanent magnet motor and rotor comprising same
CN114400804A (en) * 2022-01-24 2022-04-26 中车永济电机有限公司 Permanent magnet synchronous motor rotor structure with low torque fluctuation
USD960086S1 (en) 2017-07-25 2022-08-09 Milwaukee Electric Tool Corporation Battery pack
US11780061B2 (en) 2019-02-18 2023-10-10 Milwaukee Electric Tool Corporation Impact tool
CN117550050A (en) * 2023-11-15 2024-02-13 德州市等磁科技有限公司 Intelligent regulation type marine propulsion device
CN111384799B (en) * 2018-12-27 2024-07-05 现代自动车株式会社 Embedded permanent magnet motor and rotor comprising same

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CN101741158A (en) * 2008-11-11 2010-06-16 福特全球技术公司 Permanent magnet machine with offset pole spacing
CN103208872A (en) * 2012-01-16 2013-07-17 三星电子株式会社 Rotor and motor including the same
CN203104152U (en) * 2012-10-24 2013-07-31 广东美芝制冷设备有限公司 Compressor and permanent magnet motor rotor device thereof
KR20150022087A (en) * 2013-08-22 2015-03-04 한밭대학교 산학협력단 Interior Permanent Magnet Synchronous Machine
CN104836355A (en) * 2015-05-14 2015-08-12 广东美芝制冷设备有限公司 Rotor of rotary motor, permanent magnetic motor, compressor and air-conditioning system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101741158A (en) * 2008-11-11 2010-06-16 福特全球技术公司 Permanent magnet machine with offset pole spacing
CN103208872A (en) * 2012-01-16 2013-07-17 三星电子株式会社 Rotor and motor including the same
CN203104152U (en) * 2012-10-24 2013-07-31 广东美芝制冷设备有限公司 Compressor and permanent magnet motor rotor device thereof
KR20150022087A (en) * 2013-08-22 2015-03-04 한밭대학교 산학협력단 Interior Permanent Magnet Synchronous Machine
CN104836355A (en) * 2015-05-14 2015-08-12 广东美芝制冷设备有限公司 Rotor of rotary motor, permanent magnetic motor, compressor and air-conditioning system

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105406626A (en) * 2015-12-18 2016-03-16 珠海凌达压缩机有限公司 Motor rotor and motor
CN105449894A (en) * 2016-01-05 2016-03-30 上海特波电机有限公司 Asymmetric permanent magnet motor for new energy automobile
CN105846568A (en) * 2016-03-23 2016-08-10 东南大学 Modularized rotor of outer rotor hub motor
CN105914925A (en) * 2016-05-18 2016-08-31 江苏仪能电机有限公司 High-torque-density permanent magnet reluctance synchronous motor rotor structure
CN105914925B (en) * 2016-05-18 2018-04-13 江苏仪能电机有限公司 A kind of high torque density permanent-magnet magnetic resistance synchronous motor rotor structure
CN106300733A (en) * 2016-08-31 2017-01-04 湖北立锐机电有限公司 Interior permanent magnet machines based on I type rotor structure
CN106357072A (en) * 2016-08-31 2017-01-25 湖北立锐机电有限公司 Spoke-type rotor structure and interior permanent magnet motor adopting same
CN107872136B (en) * 2016-09-22 2021-05-04 通用电气公司 Electric machine
CN107872136A (en) * 2016-09-22 2018-04-03 通用电气公司 Motor
US11476527B2 (en) 2017-07-25 2022-10-18 Milwaukee Electric Tool Corporation High power battery-powered system
USD960086S1 (en) 2017-07-25 2022-08-09 Milwaukee Electric Tool Corporation Battery pack
US11462794B2 (en) 2017-07-25 2022-10-04 Milwaukee Electric Tool Corporation High power battery-powered system
CN107834733A (en) * 2017-11-24 2018-03-23 江苏大学 A kind of method for reducing by five phase built-in permanent magnetic motor torque ripples
CN111384799A (en) * 2018-12-27 2020-07-07 现代自动车株式会社 Embedded permanent magnet motor and rotor comprising same
CN111384799B (en) * 2018-12-27 2024-07-05 现代自动车株式会社 Embedded permanent magnet motor and rotor comprising same
US11780061B2 (en) 2019-02-18 2023-10-10 Milwaukee Electric Tool Corporation Impact tool
CN109802504A (en) * 2019-04-04 2019-05-24 山东大学 A kind of permanent magnetism magneticfocusing synchronous magnetic resistance motor and its asymmetrical rotor
CN109802504B (en) * 2019-04-04 2023-12-08 山东大学 Permanent magnet magnetic-gathering type synchronous reluctance motor and asymmetric rotor thereof
CN114400804A (en) * 2022-01-24 2022-04-26 中车永济电机有限公司 Permanent magnet synchronous motor rotor structure with low torque fluctuation
CN117550050A (en) * 2023-11-15 2024-02-13 德州市等磁科技有限公司 Intelligent regulation type marine propulsion device

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