CN104767305A - Novel rotor of permanent magnet motor - Google Patents

Novel rotor of permanent magnet motor Download PDF

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Publication number
CN104767305A
CN104767305A CN201510199117.1A CN201510199117A CN104767305A CN 104767305 A CN104767305 A CN 104767305A CN 201510199117 A CN201510199117 A CN 201510199117A CN 104767305 A CN104767305 A CN 104767305A
Authority
CN
China
Prior art keywords
rotor
magnet steel
magnet
magnetic
permanent magnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510199117.1A
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Chinese (zh)
Inventor
孙德强
贾喜勤
姬春霞
倪伟
吴楠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CRRC Yongji Electric Co Ltd
Original Assignee
Yongji Xinshisu Electric Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yongji Xinshisu Electric Equipment Co Ltd filed Critical Yongji Xinshisu Electric Equipment Co Ltd
Priority to CN201510199117.1A priority Critical patent/CN104767305A/en
Publication of CN104767305A publication Critical patent/CN104767305A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2706Inner rotors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

The invention relates to permanent magnet motors, in particular to rotors of the permanent magnet motors, provides a novel rotor of a permanent magnet motor and solves the problems caused by structural defects of rotors in existing permanent magnet motors. The rotor of the permanent magnet motor comprises a revolving shaft, a rotor sheet and magnetic steel, wherein the rotor sheet is fitted with the revolving shaft in a superimposed mode, magnetic steel grooves and vent holes are formed in the rotor sheet, and the magnetic steel is inserted in the magnetic steel grooves; the rotor sheet is of a U-shaped magnetic structure, namely every three magnetic steel grooves which are distributed in a U shape form a magnetic pole; two magnetism isolating bridge holes are formed below each magnetic pole, and the rotor sheet is in interference fit with the revolving shaft; the magnetic steel is in clearance fit with the rotor sheet, and gaps at the two ends of each section of the magnetic steel are sealed up with silicone rubber in a pouring mode. Fillets used for eliminating stress concentration are formed at the two ends of each magnetic steel groove. By means of the novel rotor of the permanent magnet motor, the realistic basis is provided for research and development of permanent magnet motors with higher power and higher rotating speed.

Description

A kind of rotor of Novel permanent-magnet motor
Technical field
The present invention relates to magneto, particularly the rotor of magneto, be specially a kind of rotor of Novel permanent-magnet motor.
Background technology
Have the plurality of advantages such as volume is little, lightweight, moment of inertia is little, rapid dynamic response speed, dynamic property balance due to magneto, in recent years, the research and extension application of magneto is subject to people's most attention.In addition, the fast development of electronic technology and control technology, the control technology of magneto is also ripe and be gradually improved.That can not exaggerate says, magneto is widely used in every field, and its market prospects are very wide.Therefore, magneto will become New-type electric machine Developing mainstream of future generation.Be even more important in Design of PM Motor process rotor punching its innovative design of key components and parts as magneto.
As shown in Figure 1, its design feature is as follows for existing rotor sheet of permanent magnet motor structure: a. adopts V-type magnetic structure punching (two magnet steel grooves of V-shaped distribution form a magnetic pole).B. magnet steel groove two ends are straight angle design substantially.C. do not design every magnetic bridge hole under the magnet steel groove of every pole.D. punching and rotating shaft are installed and are not only adopted interference fit but also adopt key to locate.Above-mentioned design feature brings following defect: startup and the speed adjusting performance of this construction rotor motor of a. are poor, and the magnetic flux often provided extremely is down limited, cause power of motor density little, permanent merit narrow range.B. this construction rotor magnet steel groove periphery and magnet steel contact position produce stress concentrate, easily cause punching local damage.C. this construction rotor magnetic leakage factor is little, and in air gap, harmonic content is high, and magnet steel utilance is low, causes capacity motor little.D. this construction rotor laminates complex process, and motor safety allowance is excessive, and not only cost is high to cause motor, and the manufacturing cycle is long.
Summary of the invention
The present invention solves the problem that existing magneto brings due to the said structure defect of its rotor, provides a kind of rotor of Novel permanent-magnet motor.
The present invention adopts following technical scheme to realize: a kind of rotor of Novel permanent-magnet motor, comprises rotating shaft, laminates and is matched with in rotating shaft and it has the rotor punching of magnet steel groove, ventilation hole, and insert in the magnet steel in magnet steel groove; Described rotor punching is U-shaped magnetic structure, and three magnet steel grooves of the distribution that namely takes the shape of the letter U form a magnetic pole; In the scope that under each magnetic pole, namely three magnet steel grooves taking the shape of the letter U distribution enclose, have two every magnetic bridge hole, two inner side and rotor punching outer rims laying respectively at the both sides magnet steel groove (three the magnet steel grooves forming each magnetic pole be divided into both sides with centre) of each magnetic pole every magnetic bridge hole; Rotor punching and rotating shaft adopt interference fit; Magnet steel and rotor punching matched in clearance, gap, every section of magnet steel two ends adopts silicon rubber embedding.Adopt U-shaped magnetic circuit permanent-magnet structure, optimize magnetic circuit, improve startup and the overload capacity of motor, effectively reduce rotor weight, add electric efficiency and capacity.Increasing under each magnetic pole every magnetic bridge hole, not affecting under punching strength conditions, can leakage field be reduced, increase magnet steel utilance, improve capacity motor.Punching and rotating shaft adopt interference fit, while ensure that motor reliability, simplify rotor and laminate technique, reduce cost and manufacturing cycle.Gap, every section of magnet steel two ends adopts silicon rubber embedding, not only plays the effect being completely fixed permanent magnet, and the elastomer after solidification can reduce magnet steel when motor runs and to withstand shocks vibration, guarantee effective sealing reliably and with long-term.
Further, magnet steel groove two ends offer for the concentrated fillet that eliminates stress.Fillet design eliminates magnet steel groove edge stress concentration problem, increases motor stamping local strength.As long as understand that the object of fillet design eliminates stress concentrated, the particular location of fillet at magnet steel groove two ends and the concrete shape of fillet, known or easy design obtains to those skilled in the art.
The rotor of magneto of the present invention improves startup and the overload capacity of motor, adds electric efficiency and capacity.Embody that permanent magnet motor structure is simple, volume is little, lightweight, loss is little, efficiency advantages of higher to the full extent.Adopt internal rotor U-shaped magnetic circuit permanent-magnet structure, meeting under motor characteristic requirement, improving the anti-demagnetizing energy force and work rate density of motor on the one hand, improve magnet steel utilance on the other hand, improving the performance of motor, reliability and life-span, decrease motor cost.Increase every magnetic bridge hole and fillet design, improve magnetic property very well and utilize, add the intensity of magnet steel groove periphery simultaneously, reach the reliability object improving motor.The present invention provides realistic basis for researching and developing more high-power, more high-revolving magneto.
Accompanying drawing explanation
Fig. 1 is the rotor punching structure schematic diagram of existing magneto;
Fig. 2 is rotor structure for permanent magnet motor schematic diagram of the present invention;
In figure: 1-rotating shaft, 2-magnet steel, 3-fillet, 4-magnet steel groove, 5-every magnetic bridge hole, 6-ventilation hole, 7-rotor punching.
Embodiment
A rotor for Novel permanent-magnet motor, comprises rotating shaft 1, laminates and is matched with in rotating shaft 1 and it has the rotor punching 7 of magnet steel groove 4, ventilation hole 6, and insert in the magnet steel 2 in magnet steel groove; Described rotor punching is U-shaped magnetic structure, and three magnet steel grooves of the distribution that namely takes the shape of the letter U form a magnetic pole; In the scope that under each magnetic pole, namely three magnet steel grooves taking the shape of the letter U distribution enclose, have two lay respectively at the both sides magnet steel groove (three the magnet steel grooves forming each magnetic pole be divided into both sides with centre) of each magnetic pole every magnetic bridge hole inner side and rotor punching outer rim every 5, two, magnetic bridge hole; Rotor punching 7 and rotating shaft 1 adopt interference fit; Magnet steel 2 and rotor punching matched in clearance, gap, every section of magnet steel two ends (gap namely and between magnet steel groove) adopts silicon rubber embedding.Magnet steel groove 4 two ends offer the fillet 3 for eliminating stress concentrated.During concrete enforcement, ventilation hole 6 is all opened under magnetic pole.Ventilation hole under each magnetic pole is five.Described every magnetic bridge hole 5 be kidney-shaped, to improve the effect that it reduces leakage field further.Rotor punching 7 adopts the thick silicon steel sheet of 0.5mm to make.Magnet steel 2 adopts the rare-earth permanent magnet of N38EH elevated operating temperature, high energy product.

Claims (7)

1. a rotor for Novel permanent-magnet motor, comprises rotating shaft (1), laminates that to be matched with rotating shaft (1) upper and it has the rotor punching (7) of magnet steel groove (4), ventilation hole (6), and inserts in the magnet steel (2) in magnet steel groove; It is characterized in that described rotor punching is U-shaped magnetic structure, three magnet steel grooves of the distribution that namely takes the shape of the letter U form a magnetic pole; In the scope that under each magnetic pole, namely three magnet steel grooves taking the shape of the letter U distribution enclose, have two every magnetic bridge hole (5), two inner side and rotor punching outer rims laying respectively at the both sides magnet steel groove of each magnetic pole every magnetic bridge hole; Rotor punching (7) and rotating shaft (1) adopt interference fit; Magnet steel (2) and rotor punching matched in clearance, gap, every section of magnet steel two ends adopts silicon rubber embedding.
2. the rotor of a kind of Novel permanent-magnet motor according to claim 1, is characterized in that magnet steel groove (4) two ends offer the fillet (3) for eliminating stress concentrated.
3. the rotor of a kind of Novel permanent-magnet motor according to claim 1 and 2, is characterized in that ventilation hole (6) is all opened under magnetic pole.
4. the rotor of a kind of Novel permanent-magnet motor according to claim 3, is characterized in that the ventilation hole under each magnetic pole is five.
5. the rotor of a kind of Novel permanent-magnet motor according to claim 1 and 2, is characterized in that every magnetic bridge hole (5) be kidney-shaped.
6. the rotor of a kind of Novel permanent-magnet motor according to claim 3, is characterized in that every magnetic bridge hole (5) be kidney-shaped.
7. the rotor of a kind of Novel permanent-magnet motor according to claim 1 and 2, is characterized in that rotor punching (7) adopts the thick silicon steel sheet of 0.5mm to make; Magnet steel (2) adopts the rare-earth permanent magnet of N38EH elevated operating temperature, high energy product.
CN201510199117.1A 2015-04-24 2015-04-24 Novel rotor of permanent magnet motor Pending CN104767305A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510199117.1A CN104767305A (en) 2015-04-24 2015-04-24 Novel rotor of permanent magnet motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510199117.1A CN104767305A (en) 2015-04-24 2015-04-24 Novel rotor of permanent magnet motor

Publications (1)

Publication Number Publication Date
CN104767305A true CN104767305A (en) 2015-07-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510199117.1A Pending CN104767305A (en) 2015-04-24 2015-04-24 Novel rotor of permanent magnet motor

Country Status (1)

Country Link
CN (1) CN104767305A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106026465A (en) * 2016-06-30 2016-10-12 安徽美芝制冷设备有限公司 Motor rotor, motor and compressor
CN106059142A (en) * 2016-06-29 2016-10-26 苏州爱知科技有限公司 Rotor structure of built-in permanent magnet synchronous motor
CN107437858A (en) * 2016-05-27 2017-12-05 比亚迪股份有限公司 Motor rotor punching sheet, rotor, motor and electric automobile
CN107666193A (en) * 2017-10-11 2018-02-06 江苏东航空机械有限公司 A kind of new energy electric automobile motor rotor punching
CN108808920A (en) * 2018-08-18 2018-11-13 上海崇林汽车电子有限公司 A kind of electric vehicle permanent magnet motor low magnetism leakage highly stressed rotor punching

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01144337A (en) * 1987-11-30 1989-06-06 Okuma Mach Works Ltd Structure of rotor of permanent magnet type motor
CN201294443Y (en) * 2008-12-01 2009-08-19 东元总合科技(杭州)有限公司 Permanent magnet self-startup synchronous motor rotor
CN102891552A (en) * 2012-10-26 2013-01-23 安徽江淮汽车股份有限公司 Built-in permanent magnet motor rotor punching and built-in permanent magnet motor rotor
CN103138444A (en) * 2011-11-29 2013-06-05 永济新时速电机电器有限责任公司 Permanent magnet synchronous motor rotor used for electric automobile
CN103872819A (en) * 2012-12-10 2014-06-18 艾默生环境优化技术(苏州)有限公司 Rotor assembly and permanent magnet motor including the same
CN104009564A (en) * 2013-02-21 2014-08-27 本田技研工业株式会社 Rotary electric machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01144337A (en) * 1987-11-30 1989-06-06 Okuma Mach Works Ltd Structure of rotor of permanent magnet type motor
CN201294443Y (en) * 2008-12-01 2009-08-19 东元总合科技(杭州)有限公司 Permanent magnet self-startup synchronous motor rotor
CN103138444A (en) * 2011-11-29 2013-06-05 永济新时速电机电器有限责任公司 Permanent magnet synchronous motor rotor used for electric automobile
CN102891552A (en) * 2012-10-26 2013-01-23 安徽江淮汽车股份有限公司 Built-in permanent magnet motor rotor punching and built-in permanent magnet motor rotor
CN103872819A (en) * 2012-12-10 2014-06-18 艾默生环境优化技术(苏州)有限公司 Rotor assembly and permanent magnet motor including the same
CN104009564A (en) * 2013-02-21 2014-08-27 本田技研工业株式会社 Rotary electric machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107437858A (en) * 2016-05-27 2017-12-05 比亚迪股份有限公司 Motor rotor punching sheet, rotor, motor and electric automobile
CN107437858B (en) * 2016-05-27 2021-05-14 比亚迪股份有限公司 Motor rotor punching sheet, motor rotor, motor and electric automobile
CN106059142A (en) * 2016-06-29 2016-10-26 苏州爱知科技有限公司 Rotor structure of built-in permanent magnet synchronous motor
CN106059142B (en) * 2016-06-29 2019-02-19 苏州爱知科技有限公司 A kind of rotor structure of internal permanent magnet synchronous motor
CN106026465A (en) * 2016-06-30 2016-10-12 安徽美芝制冷设备有限公司 Motor rotor, motor and compressor
CN107666193A (en) * 2017-10-11 2018-02-06 江苏东航空机械有限公司 A kind of new energy electric automobile motor rotor punching
CN108808920A (en) * 2018-08-18 2018-11-13 上海崇林汽车电子有限公司 A kind of electric vehicle permanent magnet motor low magnetism leakage highly stressed rotor punching

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Application publication date: 20150708

RJ01 Rejection of invention patent application after publication