CN103078459A - Coreless permanent magnet motor - Google Patents
Coreless permanent magnet motor Download PDFInfo
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- CN103078459A CN103078459A CN2013100432890A CN201310043289A CN103078459A CN 103078459 A CN103078459 A CN 103078459A CN 2013100432890 A CN2013100432890 A CN 2013100432890A CN 201310043289 A CN201310043289 A CN 201310043289A CN 103078459 A CN103078459 A CN 103078459A
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Abstract
The invention relates to a coreless permanent magnet motor, which comprises a stator and a rotor, wherein the stator is a hollow cup-shaped winding, the rotor is in a double-rotor structure, and an inner rotor of the motor is provided with a permanent magnet, an outer rotor of the motor adopts a soft magnetic material with better good conductivity, and an excitation magnetic field of the permanent magnet of the inner rotor enters the outer rotor through a coil, so that the outer rotor and the excitation magnetic field synchronize, and thus the eddy current loss is reduced and the efficiency is improved. The iron loss of a high-speed motor is reduced, meanwhile the power density of the motor is improved, the torque ripple is reduced, and the heating problem of the motor at a high speed is solved.
Description
Technical field
The present invention relates to a kind of coreless permanent magnet motor, especially a kind of birotor permanent magnetic iron-core-free synchronous machine belongs to machine field.
Background technology
The high speed coreless permanent magnet motor is compared with conventional motors, energy-saving material-saving, excellent performance; Compare with having of present advanced person rare-earth permanent-magnet electric machine unshakable in one's determination, efficient is higher, weight is lighter, stability is better.The common apparatus such as the blower fan that rare earth permanent magnetic non-iron-core motor can be applicable to have a large capacity and a wide range, water pump, compressor, also can be used on the fields such as electric automobile, wind power generation, Digit Control Machine Tool, oil-field oil pumper, mobile power station, and advantageous advantage is arranged, development prospect is wide.According to initial estimate, if having 1/3 to substitute in the newly-increased motor, nearly 50,000,000,000 kilowatt hours of can economizing on electricity every year, 500,000 tons of save silicon steel discs, 20,000 tons of copper can be created nearly 10,000,000,000 yuan output value, and economic benefit and social benefit are very considerable.It is predicted, China's pure electric automobile output will be above 10% of passenger car total output in 2015, and year power consumption surpasses 20,000,000,000 kilowatt hours.Rare earth permanent magnetic non-iron-core motor efficient is higher, and volume is less, and is more obvious than present most advanced applicable permanent magnetic brushless technical advantage in the electric automobile field.According to conservative measuring and calculating, rare earth permanent magnetic non-iron-core motor is large-scale application on electric automobile, and by 2015, a year economize on electricity surpassed 1,200,000,000 kilowatt hours.There is this novel product of 1/3rd usefulness to substitute in the motor as increasing newly, nearly 50,000,000,000 kilowatt hours of can economizing on electricity every year, 500,000 tons of save silicon steel discs, 20,000 tons of copper can be created nearly 10,000,000,000 yuan output value, and economic benefit and social benefit are very considerable.
On the other hand, existing coreless permanent magnet synchronous machine, because the existence of the problems such as high temperature under eddy current loss, leakage field and the high speed rotating, so that the power density of motor still has the possibility of further lifting.Therefore, how to improve the electromagnetic efficiency of motor, reduce the loss that exists in the machine operation, become a problem of this area staff's common concern.
Summary of the invention
In view of this, the object of the invention is to propose a kind of new coreless permanent magnet motor, this coreless permanent magnet motor can reduce the iron loss of high-speed electric expreess locomotive, and the power density of the motor that improves simultaneously reduces torque pulsation, solves the at a high speed problem of lower heating of motor.
A kind of coreless permanent magnet motor according to purpose of the present invention proposes comprises:
Stator, this stator comprise the drag cup that is formed by a plurality of winding coil cast, and this drag cup is around the machine shaft setting;
Internal rotor is arranged on described stator interior, and this internal rotor comprises the spoke that is fixed on the machine shaft, is installed in the rotor yoke iron on the described spoke, and is fixed on the permanent magnet on this rotor yoke iron;
External rotor, this external rotor include external rotor cup cylinder that soft magnetic material consists of and described external rotor cup cylinder are fixed on external rotor flange on the machine shaft, and described external rotor cup cylinder design is in the stator outside, and with the synchronous co-rotation of described internal rotor.
Preferably, described stator also comprises stator forward flange and stator rear flange, and the drag cup of described stator and this stator forward flange, stator rear flange are formed an integral body with Wear Characteristics of Epoxy Adhesive.
Preferably, the stator rear flange is fixed on the machine shaft by one group of deep groove ball bearing respectively behind the described stator forward flange.
Preferably, mode sticking beyond the described permanent magnet is fixed on the described rotor yoke iron, and perhaps described permanent magnet is embedded on the described rotor yoke iron.
Preferably, described external rotor cup cylinder is connected on the external rotor flange by epoxy glue, and interference fit between the two.
Preferably, described external rotor flange is fixed on the machine shaft by radially a tight fixed bolt, and interference fit between the two.
Preferably, this motor comprises that also described position sensing system comprises encoder retainer, encoder magnetic guiding loop and encoder magnet steel ring for the position sensing system of internal rotor rotating cycle statistics.
Preferably, the slot number of described stator and internal rotor cooperates that to satisfy pitch be 1 condition.
Preferably, the slot number coordinated scheme of described stator and internal rotor is a kind of in 8 utmost points, 9 grooves, 6 grade of 9 groove or 8 utmost points, 12 grooves.
Coreless permanent magnet motor of the present invention, stator is cup type winding, rotor is dual-rotor structure, the internal rotor of motor is installed permanent magnet, external rotor adopts preferably soft magnetic material of magnetic conduction, and internal rotor permanent-magnetic body excitation field enters external rotor by coil, makes external rotor and excitation field synchronous, reduce eddy current loss, improved efficient.The present invention has reduced the iron loss of high-speed electric expreess locomotive, and the power density of the motor that improves simultaneously reduces torque pulsation, solves the at a high speed problem of lower heating of motor, has proposed new technical scheme.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 has provided the structural representation of coreless permanent magnet motor of the present invention.
1. permanent magnet 2. rotor yoke irons 3. stator forward flanges 4. encoder retainers 5 encoder magnetic guiding loops 6. encoder magnet steel rings 7. machine shafts 8 rotor spokes 9. stator drag cups 10. external rotor cup cylinders 11. external rotor flanges 12. stator rear flanges 13. deep groove ball bearings 14. back-up rings 15. adjusting pads 16. holding screws
Embodiment
Along with the development in electric automobile field, also increasing for the demand of high speed coreless permanent magnet motor.As the replacement scheme of permanent magnetic brushless, coreless permanent magnet motor has larger advantage in cost of manufacture and energy consumption saving, can bring more economic benefit and social benefit.
Rotating speed and the power density of the present invention in order to improve coreless permanent magnet motor, adopted dual-rotor structure, stator is drag cup structure, and hollow cup coil is passed through in permanent magnet excitation magnetic field on the internal rotor, enter in the permeability magnetic material of external rotor, form the closed-loop path, this structure is synchronous at inner and outer rotors, does not almost have iron loss on external rotor, reduced the leakage field of motor, main flux is increased, and having reached increases the purpose of air-gap field, and then has improved the power density of motor.
The motor primary structure of realizing above-mentioned technique effect comprises:
Stator, this stator comprise the drag cup that is formed by a plurality of winding coil cast, and this drag cup is around the machine shaft setting;
Internal rotor is arranged on described stator interior, and this internal rotor comprises the spoke that is fixed on the machine shaft, is installed in the rotor yoke iron on the described spoke, and is fixed on the permanent magnet on this rotor yoke iron;
External rotor, this external rotor include external rotor cup cylinder that soft magnetic material consists of and described external rotor cup cylinder are fixed on external rotor flange on the machine shaft, and described external rotor cup cylinder design is in the stator outside, and with the synchronous co-rotation of described internal rotor.
Below, in connection with accompanying drawing technical scheme of the present invention is done concrete description.
See also Fig. 1, Fig. 1 is the schematic cross-section of coreless permanent magnet motor of the present invention.As shown in the figure, this coreless permanent magnet motor realizes driving the purpose of load by the rotation of machine shaft 7.This machine shaft 7 is extended to stator rear flange 12 directions by the center of external rotor flange 11, and stretches out these stator rear flange 12 formation and rotate output.This motor mainly comprises:
Stator, this stator comprise the drag cup 9 that is formed by a plurality of winding coil cast, and this drag cup 9 arranges around machine shaft 7, and be fixing by the epoxy glue cast between each winding coil.Slot number between stator and the internal rotor cooperates can kinds of schemes, yet the pitch that preferably satisfies between the two is 1, is a kind of in 8 utmost points, 9 grooves, 6 grade of 9 groove or 8 utmost points, 12 grooves such as the slot number coordinated scheme.
Stator also comprises stator forward flange 11 and stator rear flange 12, and drag cup 9 and this stator forward flange 11, the stator rear flange 12 usefulness Wear Characteristics of Epoxy Adhesives of stator are formed an integral body.This integral body so that stator can be fixed in the motor, and and internal rotor and external rotor between keep certain position relationship.Concrete, this stator forward flange 11 and stator rear flange 12 are fixed on the deep groove ball bearing 13 of front and back by one group of back-up ring 4 and adjusting pad 5 respectively, machine shaft 7 is fixed on these former and later two deep groove ball bearings 13, is connected so that this machine shaft 7 can be realized rolling with stator.Wherein stator rear flange 12 is near a side of machine shaft 7 outputs, and the axle center of satisfying stator drag cup 9 overlaps with machine shaft 7.
Internal rotor is arranged on the inside of said stator, and this internal rotor comprises the rotor spoke 8 that is fixed on the machine shaft 7, is installed in the rotor yoke iron 2 on the rotor spoke 8, and is fixed on the permanent magnet 1 on this rotor yoke iron 2.Rotor spoke 8 is selected around machine shaft 7, and rotor yoke iron 2 is installed on the outer ledge place of this rotor spoke 8, and permanent magnet 1 can be fixed on the described rotor yoke iron 2, such as boning with epoxy glue by outer sticking mode; Also can directly permanent magnet 1 be embedded on the described rotor yoke iron 2.
External rotor, this external rotor include external rotor cup cylinder 10 that soft magnetic material consists of and this external rotor cup cylinder 10 are fixed on external rotor flange 11 on the machine shaft 7.This external rotor cup cylinder 10 is connected on the external rotor flange 11 by epoxy glue, and interference fit between the two.11 of external rotor flanges are fixed on the machine shaft by one group of tight fixed bolt 16 radially, and interference fit between the two.These external rotor cup cylinder 10 designs are in the stator outside, and this external rotor cup cylinder 10 that its size can be inserted in stator drag cup 9 and can make gets final product around these stator drag cup 9 rotations.Because tightening cooperates between external rotor and the machine shaft 7, so external rotor can guarantee and the synchronous co-rotation of internal rotor.
This motor comprises that also described position sensing system comprises encoder retainer 4, encoder magnetic guiding loop 5 and encoder magnet steel ring 6 for the position sensing system of internal rotor rotating cycle statistics and the detection of internal rotor position of rotation.Wherein encoder retainer 4 is fixed on the deep groove ball bearing 13, and encoder magnetic guiding loop 5 is fixed on this encoder retainer 4, and 6 on encoder magnet steel ring is fixed on the machine shaft 7 and with this encoder magnetic guiding loop 5 and forms relative rotation.
During work, produce the magnetic field interaction that rotating magnetic field and permanent magnet produce after in a plurality of winding coils of motor stator drag cup 9, passing into electric current, thereby motor shaft 7 is rotated, realize the purpose of driving load.The excitation field that permanent magnet 1 sends on the internal rotor is by the coil of drag cup 9, enter in the permeability magnetic material of external rotor, form the closed-loop path, this structure is synchronous at inner and outer rotors, on external rotor, almost do not have iron loss, reduced the leakage field of motor, main flux is increased, having reached increases the purpose of air-gap field, and then has improved the power density of motor.
In sum, the present invention proposes a kind of coreless permanent magnet motor, stator is drag cup type winding, rotor is dual-rotor structure, and the internal rotor of motor is installed permanent magnet, and external rotor adopts preferably soft magnetic material of magnetic conduction, internal rotor permanent-magnetic body excitation field enters external rotor by coil, make external rotor and excitation field synchronous, reduce eddy current loss, improved efficient.The present invention has reduced the iron loss of high-speed electric expreess locomotive, and the power density of the motor that improves simultaneously reduces torque pulsation, solves the at a high speed problem of lower heating of motor.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, in other embodiments realization.Therefore, the present invention will can not be restricted to embodiment illustrated herein, but will meet the widest scope consistent with principle disclosed herein and features of novelty.To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, in other embodiments realization.Therefore, the present invention will can not be restricted to embodiment illustrated herein, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. a coreless permanent magnet motor is characterized in that, comprising:
Stator, this stator comprise the drag cup that is formed by a plurality of winding coil cast, and this drag cup is around the machine shaft setting;
Internal rotor is arranged on described stator interior, and this internal rotor comprises the spoke that is fixed on the machine shaft, is installed in the rotor yoke iron on the described spoke, and is fixed on the permanent magnet on this rotor yoke iron;
External rotor, this external rotor include external rotor cup cylinder that soft magnetic material consists of and described external rotor cup cylinder are fixed on external rotor flange on the machine shaft, and described external rotor cup cylinder design is in the stator outside, and with the synchronous co-rotation of described internal rotor.
2. coreless permanent magnet motor as claimed in claim 1, it is characterized in that: described stator also comprises stator forward flange and stator rear flange, the drag cup of described stator and this stator forward flange, stator rear flange are formed an integral body with Wear Characteristics of Epoxy Adhesive.
3. coreless permanent magnet motor as claimed in claim 2, it is characterized in that: the stator rear flange is fixed on the machine shaft by one group of deep groove ball bearing respectively behind the described stator forward flange.
4. coreless permanent magnet motor as claimed in claim 1 is characterized in that: mode sticking beyond the described permanent magnet is fixed on the described rotor yoke iron, and perhaps described permanent magnet is embedded on the described rotor yoke iron.
5. coreless permanent magnet motor as claimed in claim 1, it is characterized in that: described external rotor cup cylinder is connected on the external rotor flange by epoxy glue, and interference fit between the two.
6. coreless permanent magnet motor as claimed in claim 1 is characterized in that: described external rotor flange is fixed on the machine shaft by radially a tight fixed bolt, and interference fit between the two.
7. coreless permanent magnet motor as claimed in claim 1 is characterized in that: this motor comprises that also described position sensing system comprises encoder retainer, encoder magnetic guiding loop and encoder magnet steel ring for the position sensing system of internal rotor rotating cycle statistics.
8. coreless permanent magnet motor as claimed in claim 1 is characterized in that: the slot number of described stator and internal rotor cooperates that to satisfy pitch be 1 condition.
9. coreless permanent magnet motor as claimed in claim 8 is characterized in that: the slot number coordinated scheme of described stator and internal rotor is a kind of in 8 utmost points, 9 grooves, 6 grade of 9 groove or 8 utmost points, 12 grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100432890A CN103078459A (en) | 2013-02-04 | 2013-02-04 | Coreless permanent magnet motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100432890A CN103078459A (en) | 2013-02-04 | 2013-02-04 | Coreless permanent magnet motor |
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| CN103078459A true CN103078459A (en) | 2013-05-01 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904849A (en) * | 2014-03-12 | 2014-07-02 | 珠海凌达压缩机有限公司 | Horizontal type compressor |
| CN103944313A (en) * | 2014-05-09 | 2014-07-23 | 北京良明同创水处理设备开发中心 | Direct-coupled magnetic suspension fan |
| CN108394540A (en) * | 2018-03-07 | 2018-08-14 | 朱幕松 | The shaftless pump of coreless permanent magnet motor sprays nuclear submarine |
| CN109687617A (en) * | 2017-10-18 | 2019-04-26 | 上海鸣志电器股份有限公司 | A kind of drag cup winding of axial segmentation |
| CN109869321A (en) * | 2019-03-27 | 2019-06-11 | 中山大洋电机股份有限公司 | A kind of drag cup rotor water pump and new-energy automobile |
| CN110120729A (en) * | 2018-02-06 | 2019-08-13 | 上海富田电气技术有限公司 | A kind of radial magnetic field stator with no yoke Double-rotor disc permanent magnet synchronous motor |
| CN114640231A (en) * | 2022-05-23 | 2022-06-17 | 唐山工业职业技术学院 | Coreless high-power radial alternating current permanent magnet synchronous motor |
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| CN1707921A (en) * | 2004-12-30 | 2005-12-14 | 北京航空航天大学 | Non-stator iron core brushless DC motor |
| JP4569632B2 (en) * | 2006-05-17 | 2010-10-27 | パナソニック株式会社 | motor |
| CN101886932A (en) * | 2009-04-30 | 2010-11-17 | 浙江关西电机有限公司 | Position detection device, signal processing device thereof and method |
| CN202475197U (en) * | 2012-02-14 | 2012-10-03 | 山东大学 | Double-rotor switched reluctance motor for electric automobiles |
| CN203071777U (en) * | 2013-02-04 | 2013-07-17 | 苏州大学 | Coreless permanent magnet motor |
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2013
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Patent Citations (5)
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| CN1707921A (en) * | 2004-12-30 | 2005-12-14 | 北京航空航天大学 | Non-stator iron core brushless DC motor |
| JP4569632B2 (en) * | 2006-05-17 | 2010-10-27 | パナソニック株式会社 | motor |
| CN101886932A (en) * | 2009-04-30 | 2010-11-17 | 浙江关西电机有限公司 | Position detection device, signal processing device thereof and method |
| CN202475197U (en) * | 2012-02-14 | 2012-10-03 | 山东大学 | Double-rotor switched reluctance motor for electric automobiles |
| CN203071777U (en) * | 2013-02-04 | 2013-07-17 | 苏州大学 | Coreless permanent magnet motor |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904849A (en) * | 2014-03-12 | 2014-07-02 | 珠海凌达压缩机有限公司 | Horizontal type compressor |
| CN103904849B (en) * | 2014-03-12 | 2016-08-17 | 珠海凌达压缩机有限公司 | A kind of horizontal compressor |
| CN103944313A (en) * | 2014-05-09 | 2014-07-23 | 北京良明同创水处理设备开发中心 | Direct-coupled magnetic suspension fan |
| CN109687617A (en) * | 2017-10-18 | 2019-04-26 | 上海鸣志电器股份有限公司 | A kind of drag cup winding of axial segmentation |
| CN110120729A (en) * | 2018-02-06 | 2019-08-13 | 上海富田电气技术有限公司 | A kind of radial magnetic field stator with no yoke Double-rotor disc permanent magnet synchronous motor |
| CN108394540A (en) * | 2018-03-07 | 2018-08-14 | 朱幕松 | The shaftless pump of coreless permanent magnet motor sprays nuclear submarine |
| CN109869321A (en) * | 2019-03-27 | 2019-06-11 | 中山大洋电机股份有限公司 | A kind of drag cup rotor water pump and new-energy automobile |
| CN109869321B (en) * | 2019-03-27 | 2024-03-15 | 中山大洋电机股份有限公司 | Hollow cup rotor water pump and new energy automobile |
| CN114640231A (en) * | 2022-05-23 | 2022-06-17 | 唐山工业职业技术学院 | Coreless high-power radial alternating current permanent magnet synchronous motor |
| CN114640231B (en) * | 2022-05-23 | 2022-08-09 | 唐山工业职业技术学院 | Coreless high-power radial alternating current permanent magnet synchronous motor |
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Application publication date: 20130501 |