CN101707405B - Halbach array external rotor of composite-structure permanent magnet motor - Google Patents

Halbach array external rotor of composite-structure permanent magnet motor Download PDF

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Publication number
CN101707405B
CN101707405B CN2009103106238A CN200910310623A CN101707405B CN 101707405 B CN101707405 B CN 101707405B CN 2009103106238 A CN2009103106238 A CN 2009103106238A CN 200910310623 A CN200910310623 A CN 200910310623A CN 101707405 B CN101707405 B CN 101707405B
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permanent magnet
halbach
array
halbach permanent
magnet array
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CN101707405A (en
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郑萍
赵静
佟诚德
白金刚
柯文静
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Harbin Institute of Technology
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Harbin Institute of Technology
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Abstract

The invention discloses a Halbach array external rotor of a composite-structure permanent magnet motor, relating to an external rotor of a composite-structure permanent magnet synchronous motor and solving the problems of magnetic coupling and flexible selection of pole numbers of a composite-structure motor. A rotor core of the external rotor is of a cylindrical iron core, all permanent magnets in the outer layer and the inner layer of Halbach permanent magnet array are tile-shape permanent magnets which are evenly distributed inside and outside the rotor core in the circumferential direction, and the inner surfaces of one sides of the tile-shaped permanent magnets with weakened magnetic field in the outer layer Halbach permanent magnet array and the outer surfaces of one sides of the tile-shaped permanent magnets with weakened magnetic field in the inner layer Halbach permanent magnet array are respectively and fixedly connected with the outer surface and the inner surface of the rotor core. Magnetic flux in the rotor core is extremely less whether pole numbers are equal or not, so that independent control can be realized, a whole hybrid power system is in coordinated operation, and motors combined together can flexibly select magnetic pole numbers as required by actual power grade and base speed.

Description

The Halbach array external rotor of composite-structure permanent magnet motor
Technical field
The present invention relates to permanent-magnetic synchronous motor rotor, what be specifically related to is a kind of Halbach array external rotor of composite-structure permanent magnet motor.
Background technology
The fuel consume of traditional combustion engine automobile and pollution emission are the hot issues of worldwide attention.In order to overcome problems such as the efficient that the single powered vehicle of internal-combustion engine system causes in the existing vehicle is low, discharging is serious, various motors, battery and power inverter are introduced in the driver for vehicle, with the traditional combustion engine co-ordination, realize vehicle energy saving, reduction of discharging.
The patent No. is PCT/NL03/00155, publication number is WO03075437, open day on 09 12nd, 2003 the international monopoly and the patent No. are 200510130739.5, publication number is CN1945939, the motor that open day on 04 11st, 2007 Chinese patent relates to all is the feature with composite structure motor that is applied to hybrid vehicle, promptly constitute by a stator and two rotors, two rotors are as a double-rotor machine job, external rotor adjacent with stator and stator are as another common electric machine work, and total is equivalent to two motor height and is combined with each other.
Publication number is that two motors that are combined with each other that relate in the WO03075437 international monopoly all are asynchronous machine, shared external rotor is the double squirrel-cage structure, during two machine operation, causes the saturated of external rotor, cause two motor magnetic couplings very big, be difficult to independent control.Publication number is that the shared external rotor of two motors that are combined with each other that the Chinese patent of CN1945939 relates to is a permanent-magnet structure, this patent relates to has one deck permanent magnet to provide main flux for two motors simultaneously on the external rotor, can't decoupling zero when this makes two Electric Machine Control, can not realize independent control, influence the flexible operation of whole hybrid power system.On external rotor, there is two-layer permanent magnet to be respectively two motors in some prior aries in addition main flux is provided, two-layer permanent magnet number identical and over against, this is for two power of motor grades or base speed situation mutually far short of what is expected, be a disadvantageous structure: if few number of poles is all selected in both sides, can cause the low motor volume of speed to increase, power density reduces; If multipole number is all selected in both sides, can cause fast motor iron loss to increase, efficient reduces.And if select two-layer permanent magnet number of poles difference according to the power grade of two motors or base speed, the permanent magnet that relates to according to the patent mode that magnetizes also can cause two motor magnetic couplings serious, influences the control and the operation of whole system.
Summary of the invention
The present invention selects dumb problem in order to solve composite structure motor magnetic coupling problem and motor pole number, and the Halbach array external rotor of composite-structure permanent magnet motor is provided.
The Halbach array external rotor of composite-structure permanent magnet motor of the present invention is made up of rotor core 1, outer Halbach permanent magnet array 2 and internal layer Halbach permanent magnet array 3; Rotor core 1 is a cylindrical iron core, each permanent magnet in outer Halbach permanent magnet array 2 and the internal layer Halbach permanent magnet array 3 is the tile shape permanent magnet, the tile shape permanent magnet of outer Halbach array permanent magnet 2 along the circumferential direction is evenly arranged in the outside of rotor core 1, the inner surface of field weakening one side of the tile shape permanent magnet of outer Halbach array permanent magnet 2 is fixedlyed connected with the outer surface of rotor core 1, the tile shape permanent magnet of internal layer Halbach array permanent magnet 3 along the circumferential direction is evenly arranged in the inside of rotor core 1, and the outer surface of field weakening one side of the tile shape permanent magnet of internal layer Halbach array permanent magnet 3 is fixedlyed connected with the inner surface of rotor core 1.
The Halbach permanent magnet array is all adopted in the inside and outside both sides of rotor of the present invention, no matter whether number of poles is identical for two-layer permanent magnet, the capital makes that the interior magnetic flux of rotor core is few, rotor core is very unsaturated, can not cause the coupling on the magnetic circuit of two motors, two motors just can be realized independent control, the operation that whole hybrid power system is more coordinated, and each motor that is combined with each other also can be selected self number of magnetic poles with base speed by power grade according to actual needs flexibly.The employing of Halbach permanent magnet array can make rotor core adopt non-magnet material in addition, thereby can reduce the rotor core iron loss greatly, improves electric efficiency.
Description of drawings
Fig. 1 is a rotor structure cutaway view of the present invention; Fig. 2 is that outer Halbach permanent magnet array 2 and internal layer Halbach permanent magnet array 3 all are 90 ° of Halbach permanent magnet array magnetizing direction schematic diagrames that magnetize of two of every utmost points; Fig. 3 is that outer Halbach permanent magnet array 2 and internal layer Halbach permanent magnet array 3 all are 60 ° of Halbach permanent magnet array magnetizing direction schematic diagrames that magnetize of three of every utmost points; Fig. 4 is that outer Halbach permanent magnet array 2 and internal layer Halbach permanent magnet array 3 all are 45 ° of Halbach permanent magnet array magnetizing direction schematic diagrames that magnetize of four of every utmost points; Fig. 5 is that outer Halbach permanent magnet array 2 is that 90 ° of Halbach permanent magnet arrays that magnetize, the internal layer Halbach permanent magnet array 3 of two of every utmost points is 60 ° of Halbach permanent magnet array magnetizing direction schematic diagrames that magnetize of three of every utmost points; Fig. 6 is that outer Halbach permanent magnet array 2 is that 90 ° of Halbach permanent magnet arrays that magnetize, the internal layer Halbach permanent magnet array 3 of two of every utmost points is 45 ° of Halbach permanent magnet array magnetizing direction schematic diagrames that magnetize of four; Fig. 7 is that outer Halbach permanent magnet array 2 is that 60 ° of Halbach permanent magnet arrays that magnetize, the internal layer Halbach permanent magnet array 3 of three of every utmost points is 45 ° of Halbach permanent magnet array magnetizing direction schematic diagrames that magnetize of four; Fig. 8 is that two groups of Halbach permanent magnet arrays all are Distribution of Magnetic Field schematic diagrames of 90 ° of Halbach permanent magnet arrays that magnetize of two of every utmost points, Fig. 9 is that two groups of Halbach permanent magnet arrays all are Distribution of Magnetic Field schematic diagrames of 60 ° of Halbach permanent magnet arrays that magnetize of three of every utmost points, and Figure 10 is that two groups of Halbach permanent magnet arrays all are Distribution of Magnetic Field schematic diagrames of 45 ° of Halbach permanent magnet arrays that magnetize of four of every utmost points; Figure 11 and Figure 12 are one group and adopt 6 utmost points, the Distribution of Magnetic Field schematic diagram of another group employing 4 utmost points, and Figure 11 is the rotor field distribution schematic diagram of parallel magnetization in the prior art; Figure 12 is a rotor field of the present invention distribution schematic diagram; Figure 13 and Figure 14 are that rotor core is when being magnetic conductive material and non-magnetic material, the comparison diagram of the close distribution situation along circumference of motor gas-gap magnetic, air gap flux density when Figure 13 is rotor employing Halbach array structure is along the distribution situation schematic diagram of circumference, what its cathetus was represented is that rotor core 1 is permeability magnetic material, what dotted line was represented is that rotor core 1 is non-magnet material, Figure 14 be the permanent magnet of rotor when adopting radial parallel to magnetize structure air gap flux density along the distribution situation schematic diagram of circumference, what its cathetus was represented is that rotor core 1 is permeability magnetic material, and what dotted line was represented is that rotor core 1 is non-magnet material.
Embodiment
Embodiment one: in conjunction with Fig. 1 to Fig. 7 present embodiment is described, present embodiment is made up of rotor core 1, outer Halbach permanent magnet array 2 and internal layer Halbach permanent magnet array 3; Rotor core 1 is a cylindrical iron core, each permanent magnet in outer Halbach permanent magnet array 2 and the internal layer Halbach permanent magnet array 3 is the tile shape permanent magnet, the tile shape permanent magnet of outer Halbach array permanent magnet 2 along the circumferential direction is evenly arranged in the outside of rotor core 1, the inner surface of field weakening one side of the tile shape permanent magnet of outer Halbach array permanent magnet 2 is fixedlyed connected with the outer surface of rotor core 1, outer Halbach array permanent magnet 2 fixedly the time one side of magnetic field enhancing deviate from rotor core 1, the tile shape permanent magnet of internal layer Halbach array permanent magnet 3 along the circumferential direction is evenly arranged in the inside of rotor core 1, the outer surface of field weakening one side of the tile shape permanent magnet of internal layer Halbach array permanent magnet 3 is fixedlyed connected with the inner surface of rotor core 1, and internal layer Halbach array permanent magnet 3 side that magnetic field strengthens fixedly the time deviates from rotor core 1.
Embodiment two: in conjunction with Fig. 2, Fig. 3, Fig. 4, Fig. 8, Fig. 9 and Figure 10 illustrate present embodiment, present embodiment and embodiment one difference are that outer Halbach permanent magnet array 2 and internal layer Halbach permanent magnet array 3 adopts the Halbach permanent magnet array of same form, and outer Halbach permanent magnet array 2 and internal layer Halbach permanent magnet array 3 adopt 90 ° of two of the every utmost points Halbach permanent magnet arrays that magnetize simultaneously, a kind of in 45 ° of Halbach permanent magnet arrays that magnetize that 60 ° of Halbach permanent magnet arrays that magnetize that every utmost point is three or every utmost point are four.Other composition is identical with embodiment one with connected mode.Every utmost point permanent magnet blocks number is many more, and the magnetic flux between the two-layer Halbach array is few more.
Embodiment three: present embodiment is described in conjunction with Fig. 5 to Fig. 7, present embodiment and embodiment one difference are that outer Halbach permanent magnet array 2 and internal layer Halbach permanent magnet array 3 adopts multi-form Halbach permanent magnet array, and outer Halbach permanent magnet array 2 and internal layer Halbach permanent magnet array 3 adopt a kind of in 45 ° of Halbach permanent magnet arrays that magnetize of four of 60 ° of Halbach permanent magnet arrays that magnetize of three of 90 ° of two of the every utmost points Halbach permanent magnet arrays that magnetize, every utmost point or every utmost points respectively.Other composition is identical with embodiment one with connected mode.
Embodiment four: present embodiment is described in conjunction with Fig. 5, present embodiment and embodiment three differences are that outer Halbach permanent magnet array 2 adopts 90 ° of Halbach permanent magnet arrays that magnetize of two of every utmost points, internal layer Halbach permanent magnet array 3 adopts 60 ° of Halbach permanent magnet arrays that magnetize of three of every utmost points, perhaps the Halbach permanent magnet array form that adopted of internal layer Halbach permanent magnet array 3 and outer Halbach permanent magnet array 2 is exchanged, internal layer Halbach permanent magnet array 3 adopts 90 ° of Halbach permanent magnet arrays that magnetize of two of every utmost points, and outer Halbach permanent magnet array 2 adopts 60 ° of Halbach permanent magnet arrays that magnetize of three of every utmost points.Other composition is identical with embodiment three with connected mode.
Embodiment five: present embodiment is described in conjunction with Fig. 6, present embodiment and embodiment three differences are that outer Halbach permanent magnet array 2 adopts 90 ° of Halbach permanent magnet arrays that magnetize of two of every utmost points, internal layer Halbach permanent magnet array 3 adopts 45 ° of Halbach permanent magnet arrays that magnetize of four of every utmost points, perhaps the Halbach permanent magnet array form that adopted of internal layer Halbach permanent magnet array 3 and outer Halbach permanent magnet array 2 is exchanged, internal layer Halbach permanent magnet array 3 adopts 90 ° of Halbach permanent magnet arrays that magnetize of two of every utmost points, and outer Halbach permanent magnet array 2 adopts 45 ° of Halbach permanent magnet arrays that magnetize of four of every utmost points.Other composition is identical with embodiment three with connected mode.
Embodiment six: present embodiment is described in conjunction with Fig. 7, present embodiment and embodiment three differences are that outer Halbach permanent magnet array 2 adopts 60 ° of Halbach permanent magnet arrays that magnetize of three of every utmost points, internal layer Halbach permanent magnet array 3 adopts 45 ° of Halbach permanent magnet arrays that magnetize of four of every utmost points, perhaps the Halbach permanent magnet array form that adopted of internal layer Halbach permanent magnet array 3 and outer Halbach permanent magnet array 2 is exchanged, internal layer Halbach permanent magnet array 3 adopts 60 ° of Halbach permanent magnet arrays that magnetize of three of every utmost points, and outer Halbach permanent magnet array 2 adopts 45 ° of Halbach permanent magnet arrays that magnetize of four of every utmost points.Other composition is identical with embodiment three with connected mode.
Embodiment seven: present embodiment and embodiment one, two, three, four, five or six differences are that the number of poles of internal layer Halbach permanent magnet array 2 and outer Halbach permanent magnet array 3 is identical or number of poles is different.Other composition is identical with embodiment one, two, three, four, five or six with connected mode.See Figure 11 and Figure 12, two motor pole numbers are not simultaneously, adopt the rotor that axially magnetizes in the prior art to make the magnetic field of two motors influence each other greatly as Figure 11, motor gas-gap magnetic field circumferentially no longer symmetrically, this can cause harmful effect to magnetic pull and torque characteristics of motor; As Figure 12 and after adopting the Halbach array disk rotor of composite-structure permanent magnet motor of the present invention, it is very little that two motor-fields are interfered mutually, and disturb hardly in motor gas-gap magnetic field.By contrast as can be seen, adopt this patent structure can obtain better air-gap field and distribute and torque characteristics, and solve two motors well owing to interfere and the magnetic field coupled problem in the magnetic field of adopting different numbers of poles to cause.
Embodiment eight: present embodiment and embodiment seven differences are rotor core 1 employing permeability magnetic material or non-magnet material.Other composition is identical with embodiment seven with connected mode.See Figure 13 and Figure 14, because a side magnetic field intensity of Halbach field weakening is very little, whether rotor core is that magnetic conductive material is very little to the motor gas-gap influence of magnetic field.And if rotor core non-magnetic material, then the loss of rotor core is very little.Because the minimizing of this part loss, electric efficiency also can improve when calculating.And if the motor rotor core of axial charging is the non-magnetic material, then air gap flux density has more significantly and to descend, also can be very big to the influence of motor performance.
Content of the present invention is not limited only to the content of the respective embodiments described above, and the combination of one of them or several embodiments equally also can realize the purpose of inventing.

Claims (8)

1. the Halbach array external rotor of composite-structure permanent magnet motor is characterized in that it is made up of rotor core (1), outer Halbach permanent magnet array (2) and internal layer Halbach permanent magnet array (3); Rotor core (1) is a cylindrical iron core, each permanent magnet in outer Halbach permanent magnet array (2) and the internal layer Halbach permanent magnet array (3) is the tile shape permanent magnet, the tile shape permanent magnet of outer Halbach array permanent magnet (2) along the circumferential direction is evenly arranged in the outside of rotor core (1), the inner surface of field weakening one side of the tile shape permanent magnet of outer Halbach array permanent magnet (2) is fixedlyed connected with the outer surface of rotor core (1), the tile shape permanent magnet of internal layer Halbach array permanent magnet (3) along the circumferential direction is evenly arranged in the inside of rotor core (1), and the outer surface of field weakening one side of the tile shape permanent magnet of internal layer Halbach array permanent magnet (3) is fixedlyed connected with the inner surface of rotor core (1).
2. the Halbach array external rotor of composite-structure permanent magnet motor according to claim 1, it is characterized in that outer Halbach permanent magnet array (2) and internal layer Halbach permanent magnet array (3) adopt the Halbach permanent magnet array of same form, and outer Halbach permanent magnet array (2) and internal layer Halbach permanent magnet array (3) adopt a kind of in 45 ° of Halbach permanent magnet arrays that magnetize of four of 60 ° of Halbach permanent magnet arrays that magnetize of three of 90 ° of two of the every utmost points Halbach permanent magnet arrays that magnetize, every utmost point or every utmost points simultaneously.
3. the Halbach array external rotor of composite-structure permanent magnet motor according to claim 1, it is characterized in that outer Halbach permanent magnet array (2) and internal layer Halbach permanent magnet array (3) adopt multi-form Halbach permanent magnet array, and a kind of in 45 ° of Halbach permanent magnet arrays that magnetize of four of 60 ° of Halbach permanent magnet arrays that magnetize of three of 90 ° of Halbach permanent magnet arrays that magnetize, every utmost points of two of outer Halbach permanent magnet array (2) and the every utmost points of internal layer Halbach permanent magnet array (3) employing or every utmost points.
4. the Halbach array external rotor of composite-structure permanent magnet motor according to claim 3, it is characterized in that outer Halbach permanent magnet array (2) adopts 90 ° of Halbach permanent magnet arrays that magnetize of two of every utmost points, internal layer Halbach permanent magnet array (3) adopts 60 ° of Halbach permanent magnet arrays that magnetize of three of every utmost points, the perhaps Halbach permanent magnet array form exchange adopted of internal layer Halbach permanent magnet array (3) and outer Halbach permanent magnet array (2).
5. the Halbach array external rotor of composite-structure permanent magnet motor according to claim 3, it is characterized in that outer Halbach permanent magnet array (2) adopts 90 ° of Halbach permanent magnet arrays that magnetize of two of every utmost points, internal layer Halbach permanent magnet array (3) adopts 45 ° of Halbach permanent magnet arrays that magnetize of four of every utmost points, the perhaps Halbach permanent magnet array form exchange adopted of internal layer Halbach permanent magnet array (3) and outer Halbach permanent magnet array (2).
6. the Halbach array external rotor of composite-structure permanent magnet motor according to claim 3, it is characterized in that outer Halbach permanent magnet array (2) adopts 60 ° of Halbach permanent magnet arrays that magnetize of three of every utmost points, internal layer Halbach permanent magnet array (3) adopts 45 ° of Halbach permanent magnet arrays that magnetize of four of every utmost points, the perhaps Halbach permanent magnet array form exchange adopted of internal layer Halbach permanent magnet array (3) and outer Halbach permanent magnet array (2).
7. according to the Halbach array external rotor of claim 1,2,3,4,5 or 6 described composite-structure permanent magnet motors, it is characterized in that the number of poles of internal layer Halbach permanent magnet array (3) and outer Halbach permanent magnet array (2) is identical or number of poles is different.
8. the Halbach array external rotor of composite-structure permanent magnet motor according to claim 7 is characterized in that rotor core (1) employing permeability magnetic material or non-magnet material.
CN2009103106238A 2009-11-30 2009-11-30 Halbach array external rotor of composite-structure permanent magnet motor Active CN101707405B (en)

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CN102013781A (en) * 2010-12-29 2011-04-13 北京奇峰聚能科技有限公司 Brushless direct current motor with internal and external rotors and without core losses
CN102497074A (en) * 2011-12-26 2012-06-13 北京理工大学 Multiphase fault tolerant permanent magnet motor based on birotor structure
CN103872876A (en) * 2012-12-07 2014-06-18 上海微电子装备有限公司 Linear motor and platform device
CN104052221A (en) * 2014-06-12 2014-09-17 江苏大学 Halbach permanent magnetic fault-tolerant motor made from mixed magnetic materials
CN106329875A (en) * 2015-07-10 2017-01-11 上海微电子装备有限公司 Multi-degree of freedom linear motor
CN105305756A (en) * 2015-11-30 2016-02-03 河南理工大学 Salient-pole halbach composite permanent magnet rotation motor
CN105305767A (en) * 2015-11-30 2016-02-03 焦作市华鹰机电技术有限公司 Salient-pole halbach composite array and permanent magnet motor
CN105811617B (en) * 2016-04-27 2020-07-28 霍勇贤 Coreless permanent magnet motor outer rotor with magnetism gathering effect and manufacturing method thereof
CN106337892B (en) * 2016-09-27 2018-11-13 北京理工大学 A kind of eddy-current damping magnetic spring
CN106849409B (en) * 2016-11-11 2020-10-30 南方电机科技有限公司 Motor comprising HALBACH array and equipment comprising motor
RU2695813C1 (en) * 2018-10-09 2019-07-29 Алексей Александрович Никифоров Electric motor
CN110571969A (en) * 2019-09-30 2019-12-13 荣成市恒力电机有限公司 Built-in permanent magnet motor rotor and permanent magnet motor

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