CN102420475A - Permanent magnet synchronous motor - Google Patents

Permanent magnet synchronous motor Download PDF

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Publication number
CN102420475A
CN102420475A CN2010102930897A CN201010293089A CN102420475A CN 102420475 A CN102420475 A CN 102420475A CN 2010102930897 A CN2010102930897 A CN 2010102930897A CN 201010293089 A CN201010293089 A CN 201010293089A CN 102420475 A CN102420475 A CN 102420475A
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CN
China
Prior art keywords
rotor
magnet steel
synchronous motor
magnetic steel
air gap
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
CN2010102930897A
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Chinese (zh)
Inventor
余国权
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.)
Tianjin Santroll Electric Science & Technology Co Ltd
Original Assignee
Tianjin Santroll Electric Science & Technology Co Ltd
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Filing date
Publication date
Application filed by Tianjin Santroll Electric Science & Technology Co Ltd filed Critical Tianjin Santroll Electric Science & Technology Co Ltd
Priority to CN2010102930897A priority Critical patent/CN102420475A/en
Publication of CN102420475A publication Critical patent/CN102420475A/en
Pending legal-status Critical Current

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Abstract

A purpose of the present invention is providing a permanent magnet synchronous motor rotor structure which has high air gap flux density and is easy to generate back electromotive force with a sine wave. In a permanent magnet synchronous motor, a circumferential surface of the rotor is uniformly provided with a plurality of magnetic steel grooves which are independently enclosed and do not contact mutually. Every two magnetic steel grooves are arranged to form a V shape, an opening of the V shape faces excircle of the rotor, and a tip of the V shape faces a rotor center. Each magnetic steel groove is provided with magnetic steel. In each group of V-shaped magnetic steel grooves, two magnetic steel facing the excircle of the rotor core have a same magnetic pole, and magnetic poles of magnetic steel facing the excircle of the rotor core in two adjacent groups of V-shaped magnetic steel grooves are opposite with the magnetic pole of the two magnetic steel. The excircle of the rotor goes down toward the center with depth delta and smooth transition at a crossing position of axes, which means that air gap width at the crossing position is less than air gap width at a straight axis position by delta. Through improving the rotor, the permanent magnet synchronous motor rotor has high mechanical strength and a large salient pole ratio, and weakened magnetism speed expansion is facilitated.

Description

A kind of permagnetic synchronous motor
Technical field
The present invention relates to technical field of motors, particularly a kind of permagnetic synchronous motor.
Background technology
Permanent-magnetic synchronous motor rotor magnetic structure now commonly used generally is divided into surface-type and built-in.For the surface-type rotor magnetic circuit structural, permanent magnet is tile shape usually, and is affixed on the outer surface of rotor core, and the direction that permanent magnet provides magnetic flux is for radially.Have sine-shaped back electromotive force though this rotor magnetic circuit structural is easy to produce, be convenient to the research and development design of speed governing permagnetic synchronous motor controller, when high-speed cruising; Because centrifugal force is very big, break away from rotor core for preventing permanent magnet, need put the non magnetic sleeve that shields at rotor outer surface; So not only increased the weight of rotor; Also greatly increase the eddy current loss of rotor, caused electric machine temperature rise to improve, reduced efficiency of motor; And, the surface-type rotor structure, its d-axis inductance is very little with the difference of handing over the axle inductance, does not almost have reluctance torque, is unfavorable for weak magnetism speed expansion.
For the built-in rotor magnetic structure, the mechanical strength of rotor is very high, and eddy current loss is little, is more suitable for running up; And it hands over the axle inductance bigger than d-axis inductance, has bigger salient pole ratio, is convenient to weak magnetism speed expansion.But existing built-in structure, its back emf waveform is generally square wave or trapezoidal wave, and very difficult generation has sine-shaped back electromotive force, has just strengthened the research and development design difficulty of electric machine controller virtually.
Summary of the invention
The purpose of this invention is to provide a kind of higher air gap flux density that has, be easy to produce the permanent-magnetic synchronous motor rotor structure with sine-shaped back electromotive force, it has higher mechanical strength, and has bigger salient pole ratio, is convenient to weak magnetism speed expansion.
The present invention takes following technical scheme to realize:
A kind of permagnetic synchronous motor; It is characterized in that: its rotor circumference surface is evenly equipped with several and independently seals and mutual contactless magnet steel groove, the V-shaped arrangement of magnet steel groove in twos, and the V-type opening is towards the rotor cylindrical; The V-type point is towards the rotor center of circle; Be placed with magnet steel in the magnet steel groove, two magnet steel in every group of V-type magnet steel groove are identical towards the magnetic pole of rotor core cylindrical, and the magnet steel in the two adjacent groups V-type magnet steel groove is opposite towards the polarity of rotor core cylindrical; The rotor cylindrical promptly hands over axle place width of air gap than the little δ of d-axis place width of air gap handing over the axle place to the recessed certain depth δ of center of circle direction and seamlessly transit.
Said recessed degree of depth δ=(0.5~1.5) τ, wherein τ is rotor cylindrical width of air gap between circle in d-axis place and motor stator.
The rotor cylindrical has a convexity at the recessed position of handing over axle.
Said convexity is protruding in identical with the maximum outside diameter of rotor, and protruding width is (1~2) δ.
Have the mark groove on the circle in the rotor, said mark groove have a plurality of and shape different.
Said rotor is provided with the tacking contact, and riveted joint is used when supplying rotor punching to laminate.
The present invention compared with prior art has significant advantage and beneficial effect, is embodied in the following aspects:
Novel permanent magnetic synchronous motor of the present invention, cogging torque is little, with respect to the traditional handicraft of skewed stator slot or skewed-rotor, has simplified technological process, is easy to assembling and makes.
Use the motor of V-type magnet steel groove rotor structure, the sine property of waveform is better, simultaneously; The magnetic that permanent magnetic circuit produces is close big, and motor has higher power density, under the same torque; Electric current is less, and is very favourable to the electronic component life-span that prolongs the controller that is connected with motor.
There is convexity the friendship axial region position of rotor cylindrical, can increase the friendship axle inductance of motor effectively, increases the salient pole ratio, improves the weak magnetism speed expansion ability of motor.
Description of drawings
Fig. 1 is a permanent-magnetic synchronous motor rotor structural representation of the present invention;
Fig. 2 is a permanent-magnetic synchronous motor rotor partial structurtes sketch map of the present invention;
Fig. 3 is a permagnetic synchronous motor cogging torque oscillogram of the present invention;
Fig. 4 is the back emf waveform figure that permagnetic synchronous motor of the present invention produces.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is done further detailed description:
Like accompanying drawing 1,1st, rotor, the 2nd, the magnet steel groove, the 3rd, protruding, the 4th, the magnet steel slot air gap, the 5th, the mark groove, the 6th, tacking contact, d are the motor d-axis, q is that motor is handed over axle.
A kind of permagnetic synchronous motor of the present invention, its rotor 1 circumferential surface is evenly equipped with several magnet steel grooves 2, and each magnet steel groove all is independent sealing and contactless each other; Be provided with 16 magnet steel grooves of 8 utmost points on the rotor in the present embodiment altogether; The V-shaped arrangement of magnet steel groove in twos is a V-type magnet steel groove group like 2 two magnet steel grooves pointed in the diagram, and the V-type opening is towards the rotor cylindrical; The V-type point is towards the rotor center of circle, and 8 V-type magnet steel groove groups are distributed on the rotor circumference.
Be placed with magnet steel in the magnet steel groove; Magnet steel in the present embodiment is a word rectangle, and magnet steel is embedded in the magnet steel groove, and the two ends of magnet steel groove still have the magnet steel slot air gap 4 of definite shape; Magnet steel groove in the present embodiment is semicircle near the magnet steel slot air gap 4 of the center of circle one side; Magnet steel slot air gap 4 near cylindrical one side is a triangular form, and the leakage field that magnet steel slot air gap 4 more helps reducing the magnet steel two ends is set, and main magnetic circuit is played better gather the magnetic effect.
Two magnet steel in every group of V-type magnet steel groove are identical towards the magnetic pole of rotor core cylindrical; Magnet steel in the two adjacent groups V-type magnet steel groove is opposite towards the polarity of rotor core cylindrical; Magnet steel as in 2 one group of V-type magnet steel groove pointed in the diagram is the N utmost point towards the magnetic pole of cylindrical; Magnet steel in then should two groups of V-type magnet steel grooves on the group V-type groove both sides magnetic pole of circular direction outwardly is the S utmost point all, is staggered successively.The magnet steel groove that adopts V-type to arrange is placed magnet steel not only makes motor obtain bigger magnetic flux density, and magnet steel is to be embedded in the magnet steel groove of V-type, has increased the stability of rotor when high-speed cruising.
The center of each V-type magnet steel groove group and the line in the rotor center of circle are motor pole d-axis d, and the center between per two V-type magnet steel groove groups and the line in the rotor center of circle are that motor pole is handed over axle q.The rotor cylindrical hands over axle q place to the recessed certain depth δ of center of circle direction in each of motor; And seamlessly transit; Recessed degree of depth δ=(0.5~1.5) τ, wherein τ is rotor cylindrical width of air gap between circle in d-axis place and motor stator, promptly hands over axle place width of air gap than the little δ of d-axis place width of air gap.
The rotor cylindrical hands over the recessed position of axle that a convexity 3 is arranged at each; Protruding 3 is protruding in identical with the maximum outside diameter of rotor, and protruding width is (1~2) δ, and protruding 3 have reduced cylindrical hands over the width of air gap at axle place; Magnetic resistance is corresponding to be reduced; Therefore increase the friendship axle inductance of motor effectively, increased the salient pole ratio, improved the weak magnetism speed expansion ability of motor.
Have mark groove 5 on the circle in the rotor, said mark groove have a plurality of and shape different, adopt symmetric shape different mark groove 5 in a pair of position in the present embodiment, in rotor, having 5, one of two mark grooves on the same straight line of circle is square groove, one is angle-shaped groove.Owing to possibly produce the absolute symmetry that burr maybe can not satisfy circular punching in the manufacturing process of rotor punching; Therefore the direction in the time of can when making rotor core, making rotor punching according to compacting by 5 of mark grooves is arranged and is laminated; Better guarantee the compactness of rotor core, improved the overall performance of motor.
Rotor is provided with tacking contact 6, adopts a plurality of tacking contacts 6 to be distributed on the rotor disc, and riveted joint is used when supplying rotor punching to laminate.

Claims (7)

1. permagnetic synchronous motor; It is characterized in that: its rotor circumference surface is evenly equipped with several and independently seals and mutual contactless magnet steel groove, the V-shaped arrangement of magnet steel groove in twos, and the V-type opening is towards the rotor cylindrical; The V-type point is towards the rotor center of circle; Be placed with magnet steel in the magnet steel groove, two magnet steel in every group of V-type magnet steel groove are identical towards the magnetic pole of rotor core cylindrical, and the magnet steel in the two adjacent groups V-type magnet steel groove is opposite towards the polarity of rotor core cylindrical; The rotor cylindrical promptly hands over axle place width of air gap than the little δ of d-axis place width of air gap handing over the axle place to the recessed certain depth δ of center of circle direction and seamlessly transit.
2. a kind of permagnetic synchronous motor according to claim 1 is characterized in that: said recessed degree of depth δ=(0.5~1.5) τ, wherein τ is rotor cylindrical width of air gap between circle in d-axis place and motor stator.
3. a kind of permagnetic synchronous motor according to claim 1 is characterized in that: the rotor cylindrical has a convexity at the recessed position of handing over axle.
4. a kind of permagnetic synchronous motor according to claim 3 is characterized in that: said convexity is protruding in identical with the maximum outside diameter of rotor, and protruding width is (1~2) δ.
5. a kind of permagnetic synchronous motor according to claim 1 is characterized in that: have the mark groove on the circle in the rotor.
6. a kind of permagnetic synchronous motor according to claim 5 is characterized in that: said mark groove have a plurality of and shape different.
7. a kind of permagnetic synchronous motor according to claim 1 is characterized in that: said rotor is provided with the tacking contact, and riveted joint is used when supplying rotor punching to laminate.
CN2010102930897A 2010-09-27 2010-09-27 Permanent magnet synchronous motor Pending CN102420475A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010102930897A CN102420475A (en) 2010-09-27 2010-09-27 Permanent magnet synchronous motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010102930897A CN102420475A (en) 2010-09-27 2010-09-27 Permanent magnet synchronous motor

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CN102420475A true CN102420475A (en) 2012-04-18

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103259356A (en) * 2013-05-13 2013-08-21 广东威灵电机制造有限公司 Rotor of permanent magnet motor
CN106100183A (en) * 2016-08-13 2016-11-09 中车永济电机有限公司 A kind of high temperature, high rotating speed rotor structure for permanent magnet motor
CN110149016A (en) * 2019-06-28 2019-08-20 泉州装备制造研究所 Novel position-sensor-free permanent magnet synchronous motor and rotor-position judgment method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62166755A (en) * 1986-01-16 1987-07-23 Sanyo Electric Co Ltd Rotor with permanent magnet
JP2001095182A (en) * 1999-09-20 2001-04-06 Fujitsu General Ltd Permanent magent electric motor
CN1392654A (en) * 2001-06-14 2003-01-22 Lg电子株式会社 Single phase directly start permanent magnetic synchronous moter
US20050200223A1 (en) * 2004-03-10 2005-09-15 Hitachi, Ltd. Permanent magnet rotating electric machine and electric car using the same
CN1713483A (en) * 2004-06-24 2005-12-28 发那科株式会社 Synchronous electric motor
CN200983519Y (en) * 2006-11-01 2007-11-28 宁波骏腾国际工贸有限公司 Poly-magnetic low-fluctuation permanent brushless motor
JP2008312318A (en) * 2007-06-13 2008-12-25 Toshiba Industrial Products Manufacturing Corp Rotor of rotary electric machine, and rotary electric machine
CN201533199U (en) * 2009-08-06 2010-07-21 浙江绍兴新星机电有限公司 Electric machine stator and rotor for a refrigeration compressor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62166755A (en) * 1986-01-16 1987-07-23 Sanyo Electric Co Ltd Rotor with permanent magnet
JP2001095182A (en) * 1999-09-20 2001-04-06 Fujitsu General Ltd Permanent magent electric motor
CN1392654A (en) * 2001-06-14 2003-01-22 Lg电子株式会社 Single phase directly start permanent magnetic synchronous moter
US20050200223A1 (en) * 2004-03-10 2005-09-15 Hitachi, Ltd. Permanent magnet rotating electric machine and electric car using the same
CN1713483A (en) * 2004-06-24 2005-12-28 发那科株式会社 Synchronous electric motor
CN200983519Y (en) * 2006-11-01 2007-11-28 宁波骏腾国际工贸有限公司 Poly-magnetic low-fluctuation permanent brushless motor
JP2008312318A (en) * 2007-06-13 2008-12-25 Toshiba Industrial Products Manufacturing Corp Rotor of rotary electric machine, and rotary electric machine
CN201533199U (en) * 2009-08-06 2010-07-21 浙江绍兴新星机电有限公司 Electric machine stator and rotor for a refrigeration compressor

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* Cited by examiner, † Cited by third party
Title
唐任远: "《现代永磁电机理论与设计》", 31 December 1997, 机械工业出版社 *
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103259356A (en) * 2013-05-13 2013-08-21 广东威灵电机制造有限公司 Rotor of permanent magnet motor
CN103259356B (en) * 2013-05-13 2016-06-08 广东威灵电机制造有限公司 The rotor of permanent-magnet machine
CN106100183A (en) * 2016-08-13 2016-11-09 中车永济电机有限公司 A kind of high temperature, high rotating speed rotor structure for permanent magnet motor
CN110149016A (en) * 2019-06-28 2019-08-20 泉州装备制造研究所 Novel position-sensor-free permanent magnet synchronous motor and rotor-position judgment method
CN110149016B (en) * 2019-06-28 2020-05-19 泉州装备制造研究所 Position-sensorless permanent magnet synchronous motor and rotor position judgment method

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Application publication date: 20120418