CN201918877U - Small-size, light and high-efficiency direct-driving motor - Google Patents

Small-size, light and high-efficiency direct-driving motor Download PDF

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Publication number
CN201918877U
CN201918877U CN2010205135695U CN201020513569U CN201918877U CN 201918877 U CN201918877 U CN 201918877U CN 2010205135695 U CN2010205135695 U CN 2010205135695U CN 201020513569 U CN201020513569 U CN 201020513569U CN 201918877 U CN201918877 U CN 201918877U
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CN
China
Prior art keywords
motor
adjustable magnetic
stator
static
rotor
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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.)
Expired - Lifetime
Application number
CN2010205135695U
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Chinese (zh)
Inventor
樊英
江和和
程明
邹国荣
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Southeast University
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Southeast University
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Publication date
Application filed by Southeast University filed Critical Southeast University
Priority to CN2010205135695U priority Critical patent/CN201918877U/en
Application granted granted Critical
Publication of CN201918877U publication Critical patent/CN201918877U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a small-size, light and high-efficiency direct-driving motor which can output larger stable torque at a low speed and overcomes the disadvantage of the large size of the traditional direct-driving motor. An outer rotor (1) of the motor is used as a shell of the motor, the outer rotor (1) is rotatablely connected with a motor shaft (7) by a bearing (8), and permanent magnets (3) are uniformly embedded on a rotor yoke (2) along the circumferential direction; an inner stator (5) adopts a stator structure of a traditional outer-rotor permanent-magnet brushless direct-current motor, and a static magnet-adjusting ring (4) adopts a cup-shaped structure and is directly sleeved on the surface of the inner stator (5), so that an air gap between the static magnet-adjusting ring (4) and the inner stator (5) is saved, and the motor becomes a single air gap structure; the static magnet-adjusting ring (4) consists of magnet-adjusting blocks (9) and non-magnet-adjusting blocks (10), wherein the magnet-adjusting blocks (9) and the non-magnet-adjusting blocks (10) are arranged at intervals along the circumferential direction; and the motor shaft (7) is used for fixing the inner stator (5) of the motor and the static magnet-adjusting ring (4).

Description

The little lightweight high efficiency direct-drive motor of volume
Technical field
The utility model relates to the little lightweight high efficiency direct-drive motor of a kind of volume, belongs to the technical field that specific type of electric machine is made.
Background technology
For avoiding mechanical gear drive system noise height, problems such as efficient is low, transmission precision is low, low-response, mechanical wear, often need direct-drive motor in the industrial production.But traditional direct-drive motor rotating speed is low, bulky, cost is high.The magnetic gear is a kind of novel gear structure; advantages such as it has that noise is low, freedom from repairs, reliability height, torque transfer ability are big, automatic overload protection; thereby the formation compound machine is integrated in it and common brushless, permanently external rotor electric machine; the structure of this motor compact can realize the control of high-speed electric expreess locomotive and the output of the big torque of low-speed direct driving simultaneously; therefore, be necessary to propose the New-type electric machine that a kind of space magnetic field modulation principle that utilizes the magnetic gear carries out low-speed direct driving.
Summary of the invention
Technical problem: the utility model is by proposing the little lightweight high efficiency direct-drive motor of a kind of volume, solved mechanical step-up gear power density in the existing transmission device low, problem and the bulky shortcomings of traditional direct-drive motor such as mechanical wear and noise are arranged, on the basis of traditional magnetic gear structure, save simultaneously the internal rotor and the two-layer air gap of a magnetic gear, simplified manufacturing process, volume, weight and the manufacturing cost of motor have been reduced, improve efficient, also removed the bigger vibration and the noise that bring by magnetic gear internal rotor simultaneously.
Technical scheme: the utility model discloses the little lightweight high efficiency direct-drive motor of a kind of volume, it comprises motor outer rotor, external rotor yoke, permanent magnet, static adjustable magnetic ring, internal stator, winding, motor shaft, bearing; It is characterized in that the casing of the external rotor of this motor as motor, external rotor is rotationally connected by bearing and motor shaft, and permanent magnet along the circumferential direction evenly embeds on rotor yoke; Internal stator adopts external rotor permanent magnet brushless DC motor stator structure, and static adjustable magnetic ring adopts cup-shaped structure directly to be placed in inner stator face, saves the air gap between static adjustable magnetic ring and the internal stator, and motor becomes single air gap mechanism; Static adjustable magnetic ring is made up of circumferencial direction adjustable magnetic piece and non-adjustable magnetic piece spaced apart; Motor shaft is used for fixing electric motor internal stator and static adjustable magnetic ring, is connected by bearing with external rotor simultaneously.
The adjustable magnetic block of material of described static adjustable magnetic ring is a silicon steel sheet, and non-adjustable magnetic block of material is the aluminium of non-magnetic conduction.
Magnetic gear external rotor adopts permanent magnet and the staggered form of iron core, and all permanent magnet polarities are identical, and permanent magnet material is a neodymium iron boron.The motor outer rotor permanent magnet is counted n rWith armature winding field pole logarithm n pSum is an adjustable magnetic piece number n in the static adjustable magnetic ring s
The field pole logarithm that produces when the connected mode of inner stator coil winding is n P,And when passing to the alternating current of certain frequency, the rotating magnetic field angular speed that the armature winding electric current produces is ω 1, by the magnetic field modulation effect of stator rise magnetic patch, in the close air gap of external rotor one side, producing a modulating wave magnetic field, its angular velocity of rotation is-ω 2, the permanent magnet on this magnetic field and the external rotor interacts, and drives the external rotor rotation, thereby realizes different angular velocity omegas by changing the frequency that feeds winding current 1, and then obtain different external rotor rotary speed-ω 2, realize that speed governing drives.ω 1: ω 2Be the speed no-load voltage ratio, equal the ratio of the field pole logarithm that external rotor permanent magnet body number and internal stator armature winding produces.
For modulating maximum harmonic field, get the field pole logarithm sum that adjustable magnetic iron block number in the static adjustable magnetic ring equals external rotor permanent magnet body number and the generation of internal stator armature winding.
Beneficial effect:
(1) saves the mechanical speed-changing gear case, do not had mechanical wear, maintenance and the noise problem of gear box, improved device reliability.Improved motor speed simultaneously, reduced the volume of motor, weight and manufacturing cost.
(2) saved the internal rotor of magnetic gear, manufacturing process is simplified greatly, reduces the permanent magnet consumption.
(3) save air gap between static adjustable magnetic ring and the stator, reduced magnetic resistance, increased the power density of motor.
(4) static adjustable magnetic ring adopts the structure that directly is placed in stator surface, and is easy for installation, simplified the structure of motor, improved Mechanical Reliability.
(5) the non-adjustable magnetic of static adjustable magnetic ring partly adopts non-magnetic aluminium, helps the heat radiation of motor.
(6) rotor adopts high energy product neodymium iron boron excitation, does not have slip ring and brush, need not the additional power source excitation, have simple in structure, volume little in light weight, power density is high, efficient is high and advantage such as good reliability.
Description of drawings
Fig. 1 is the utility model structural representation.
Wherein have: external rotor 1, external rotor yoke 2, permanent magnet 3, static adjustable magnetic ring 4, internal stator 5, winding 6, motor shaft 7, bearing 8.
Fig. 2 is the utility model motor complete machine sectional view.
Wherein have: external rotor yoke 2, permanent magnet 3, static adjustable magnetic ring 4, the adjustable magnetic piece 9 of static adjustable magnetic ring, the non-adjustable magnetic piece 10 of static adjustable magnetic ring, stator slot 11, stator tooth 12, motor shaft 7.
Embodiment
Be concrete enforcement of the present utility model below, be used for further describing:
The utility model is the little lightweight high efficiency direct-drive motor of a kind of volume, comprises motor outer rotor 1, external rotor yoke 2, permanent magnet 3, static adjustable magnetic ring 4, internal stator 5, winding 6, motor shaft 7, bearing 8; The external rotor 1 of motor is as the casing of motor, and external rotor 1 is rotationally connected by bearing 8 and motor shaft 7, and permanent magnet 3 along the circumferential direction evenly embeds on rotor yoke 2.Internal stator 5 adopts traditional external rotor permanent magnet brushless DC motor stator structure, static adjustable magnetic ring 4 adopts cup-shaped structure directly to be placed in stator surface, save the air gap between adjustable magnetic ring and the stator, motor becomes single air gap mechanism, static adjustable magnetic ring is made up of circumferencial direction adjustable magnetic piece 9 and non-adjustable magnetic piece 10 spaced apart, motor shaft 7 is used for fixing internal stator 5 and static adjustable magnetic ring 4, is rotationally connected by bearing 8 with external rotor 1 simultaneously.
Be depicted as this electric machine structure as figure two: between external rotor 1 and the static adjustable magnetic ring 4 air gap is arranged.Static adjustable magnetic ring 4 adopts cup-shaped structure directly to be placed in stator 5 surfaces, saves the air gap between adjustable magnetic ring and the stator.
Basic principle of the present invention is the space magnetic field modulation principle of traditional magnetic gear adjustable magnetic ring, utilizes space harmonics to transmit energy, both may operate in motoring condition, also may operate in generating state.
When this motor operates in motoring condition, pass to the alternating current of certain frequency in the inner stator coil, the rotating magnetic field angular speed that the armature winding electric current produces is ω 1, through the modulating action of static adjustable magnetic ring, in the close air gap of external rotor one side, producing a modulating wave magnetic field, its angular velocity of rotation is-ω 2, the permanent magnet at this magnetic field and external rotor place interacts, and drives the external rotor rotation, thereby realizes different angular velocity omegas by the frequency that changes armature supply 1, and then obtain different external rotor rotary speed-ω 2, realize that speed governing drives.ω 1: ω 2Be the speed no-load voltage ratio, equal the external rotor permanent magnet body and count n rWith internal stator field pole logarithm n pThe ratio.Therefore, this motor can be applicable in the hub motor for electric automobile of direct driving, can satisfy when low speed the requirement to big torque, can realize the electric braking of Electric Motor Wheel, electromechanical combined braking and braking energy feedback, energy savings simultaneously.
When this motor operated in generating state, the permanent magnet low-speed external rotor was with angular speed-ω 2Rotation through the modulating action of static adjustable magnetic ring magnetic inductive block, modulates the magnetic field of linkage stator, and its rotating magnetic field angular speed is ω 1, this magnetic field and motor stator winding produce relative motion, and the cutting winding conducting wire produces electric energy.ω 1: ω 2Be the speed no-load voltage ratio, equal the external rotor permanent magnet body and count n rField pole logarithm n with internal stator pThe ratio.Generally, the external rotor permanent magnet body is counted n rBe much larger than stator field number of pole-pairs n p, therefore, can realize motor generator operation under low-speed conditions, be particularly useful for the occasion of low-speed direct driving wind power generation.

Claims (3)

1. little lightweight high efficiency direct-drive motor of volume, it comprises motor outer rotor (1), external rotor yoke (2), permanent magnet (3), static adjustable magnetic ring (4), internal stator (5), winding (6), motor shaft (7), bearing (8); It is characterized in that the casing of the external rotor (1) of this motor as motor, external rotor (1) is rotationally connected by bearing (8) and motor shaft (7), and permanent magnet (3) along the circumferential direction evenly embeds on rotor yoke (2); Internal stator (5) adopts external rotor permanent magnet brushless DC motor stator structure, and static adjustable magnetic ring (4) adopts cup-shaped structure directly to be placed in internal stator (5) surface, and motor becomes single air gap mechanism; Static adjustable magnetic ring (4) is made up of circumferencial direction adjustable magnetic piece (9) and non-adjustable magnetic piece (10) spaced apart; Motor shaft (7) is used for fixing electric motor internal stator (5) and static adjustable magnetic ring (4).
2. the little lightweight high efficiency direct-drive motor of volume according to claim 1, the adjustable magnetic block of material that it is characterized in that described static adjustable magnetic ring (4) is a silicon steel sheet, non-adjustable magnetic block of material is the aluminium of non-magnetic conduction.
3. the little lightweight high efficiency direct-drive motor of volume according to claim 1 is characterized in that the number n of motor outer rotor permanent magnet (3) rWith armature winding field pole logarithm n pSum is an adjustable magnetic piece number n in the static adjustable magnetic ring s
CN2010205135695U 2010-08-31 2010-08-31 Small-size, light and high-efficiency direct-driving motor Expired - Lifetime CN201918877U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010205135695U CN201918877U (en) 2010-08-31 2010-08-31 Small-size, light and high-efficiency direct-driving motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010205135695U CN201918877U (en) 2010-08-31 2010-08-31 Small-size, light and high-efficiency direct-driving motor

Publications (1)

Publication Number Publication Date
CN201918877U true CN201918877U (en) 2011-08-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010205135695U Expired - Lifetime CN201918877U (en) 2010-08-31 2010-08-31 Small-size, light and high-efficiency direct-driving motor

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101951048A (en) * 2010-08-31 2011-01-19 东南大学 Direct-drive electric motor modulated basing on space magnetic field
CN105790545A (en) * 2016-04-15 2016-07-20 江苏磁谷科技股份有限公司 High-power permanent magnetic coupler provided with single-turn wave winding
CN105871139A (en) * 2016-04-01 2016-08-17 张汝林 Permanent-magnet double-layer rotor motor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101951048A (en) * 2010-08-31 2011-01-19 东南大学 Direct-drive electric motor modulated basing on space magnetic field
CN105871139A (en) * 2016-04-01 2016-08-17 张汝林 Permanent-magnet double-layer rotor motor
CN105790545A (en) * 2016-04-15 2016-07-20 江苏磁谷科技股份有限公司 High-power permanent magnetic coupler provided with single-turn wave winding

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CU01 Correction of utility model patent

Correction item: Name of the fourth inventor

Correct: Zou Guotang

False: Zou Guorong

Number: 31

Page: The title page

Volume: 27

CU03 Correction of utility model patent gazette

Correction item: Inventor

Correct: Fan Ying|Jiang Hehe|Cheng Ming| Zou Guotang

False: Fan Ying|Jiang Hehe|Cheng Ming|Zou Guorong

Number: 31

Volume: 27

ERR Gazette correction

Free format text: CORRECT: INVENTOR; FROM: FAN YING; JIANG HEHE, CHENG MING, ZOU GUORONG TO: FAN YING; JIANG HEHE, CHENG MING, ZOU GUOTANG

AV01 Patent right actively abandoned

Granted publication date: 20110803

Effective date of abandoning: 20120613