CN102013781A - Brushless direct current motor with internal and external rotors and without core losses - Google Patents
Brushless direct current motor with internal and external rotors and without core losses Download PDFInfo
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- CN102013781A CN102013781A CN 201010610875 CN201010610875A CN102013781A CN 102013781 A CN102013781 A CN 102013781A CN 201010610875 CN201010610875 CN 201010610875 CN 201010610875 A CN201010610875 A CN 201010610875A CN 102013781 A CN102013781 A CN 102013781A
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Abstract
The invention provides a brushless direct current motor without core losses, comprising outer Halbach magnets, inner Halbach magnets, a rotor shaft and coreless stators formed by windings and frameworks, wherein the outer Halbach magnets and the inner Halbach magnets are connected on the rotor shaft by magnet isolating sleeves so that the outer Halbach magnets and the inner Halbach magnets rotate synchronously with the rotor shaft; the coreless stators are installed and fixed on casings; the outer Halbach magnets, the coreless stators, the inner Halbach magnets and the air gaps among the magnets and the coreless stators form closed magnetic circuits; and sinusoidal magnetic fields with high density are formed between the outer Halbach magnets and the inner Halbach magnets. The motor provided by the invention removes the stator cores and the rotor cores so that the rotors do not have core losses at any working speed, thus radically solving the problem of core losses, and the motor simultaneously has the advantages of light weight, low power consumption, reliable structure and the like.
Description
Technical field:
The present invention relates to a kind of brshless DC motor, particularly relate to a kind of no loss brshless DC motor unshakable in one's determination, can be applicable to occasions such as high speed, low-power consumption.
Background technology:
Contain stator core and rotor core in traditional brshless DC motor body more, when motor rotation, magnetic field alternate in stator core and the rotor core produce magnetic hysteresis loss and eddy current loss, and these losses increases suddenly along with the increase of rotor speed.When the tradition brshless DC motor was applied to the occasion of high speed rotating, the electric machine iron core loss was bigger, and efficient is low.In addition,, thereby can make torque produce certain pulsation, cause a part of loss because the existence of stator teeth groove when rotor high-speed rotates, can produce cogging torque and slot ripples.Can not eliminate cogging torque and slot ripples though there is the teeth groove brshless DC motor, make rotor rotation tend to be steady, because the existence of stator core, the loss of stator core still exists.So the huge core loss that produces in stator core and rotor core when how to reduce the brshless DC motor high speed rotating is to expand it in high speed situation key in application problem.
Summary of the invention:
The purpose of this invention is to provide a kind of no loss brshless DC motor unshakable in one's determination, compared with prior art, advantage such as its in light weight, low in energy consumption and reliable in structure.
The present invention adopts following technical scheme for achieving the above object:
A kind of no loss brshless DC motor unshakable in one's determination provided by the invention, the principle that wherein inside and outside Halbach magnet produces sinusoidal magnetic field is: adopt the mode that magnetizes as shown in Figure 4, interior Halbach magnet is identical with outer Halbach magnet pole logarithm, and each magnetic pole is made of 3 Halbach magnets.The magnetization of outer Halbach magnet is:
Produce internal magnetic field; The magnetization of interior Halbach magnet is:
Produce external magnetic field.The magnetic field that outer Halbach magnet magnetization radial component produces in air gap, the magnetic field that produces in air gap with interior Halbach magnet magnetization radial component superposes mutually, the magnetic field that outer Halbach magnet magnetization tangential component produces in air gap, cancel each other with the magnetic field that interior Halbach magnet magnetization tangential component produces in air gap, produce high-intensity sinusoidal air gap flux density.
A kind of no loss brshless DC motor unshakable in one's determination provided by the invention comprises outer Halbach magnet, interior Halbach magnet, armature spindle and the drag cup stator that is made of winding and skeleton.The skeleton of drag cup stator is a non-magnet material.Outer Halbach magnet and interior Halbach magnet all are connected on the armature spindle, make outer Halbach magnet and interior Halbach magnet rotate synchronously with armature spindle, and the drag cup stator is fixed on the casing.
A kind of no loss brshless DC motor unshakable in one's determination provided by the invention, outer Halbach magnet and interior Halbach magnet and armature spindle rotate synchronously, do not have relative motion with respect to armature spindle, thereby can not produce loss in the armature spindle.Hall element in the drag cup stator winding detects the position of Halbach magnet poles, output signal according to Hall element, in corresponding winding, feed corresponding electric current, produce armature field, the magnetic field interaction that this magnetic field and Halbach magnet produce, produce magnetic field force, make outer Halbach magnet and interior Halbach magnet rotate synchronously with armature spindle.The drag cup stator does not have iron core, so rotor can not produce core loss in stator when any rotating speed, so a kind of no loss brshless DC motor unshakable in one's determination provided by the invention can be eliminated core loss.
Beneficial effect:
A kind of no loss brshless DC motor unshakable in one's determination provided by the invention, compare with traditional brshless DC motor, there is not teeth groove, therefore can eliminate the slot effect of traditional brshless DC motor, make rotor torque steady, help heat radiation simultaneously, owing to a little less than the armature reaction of this kind structure brshless DC motor, help the realization of various control methods.Compare with no teeth groove brshless DC motor, the invention provides no loss brshless DC motor unshakable in one's determination and cancelled stator core and rotor core, make the drag cup winding be independent of electric machine iron core, fundamentally solved the core loss problem.Permanent magnet adopts outer Halbach magnet and interior Halbach magnet structure, the magnetic field that these two Halbach magnet magnetization radial components produce in air gap superposes mutually, cancelling each other in the magnetic field that magnetization tangential component produces in air gap, produces high-intensity sinusoidal air gap flux density.
Description of drawings:
A kind of no loss brshless DC motor schematic diagram unshakable in one's determination of Fig. 1;
A kind of drag cup stator structure schematic diagram that does not have loss brshless DC motor unshakable in one's determination of Fig. 2;
Fig. 3 (a) is the mode that magnetizes of interior Halbach magnet, (b) is the mode that magnetizes of Halbach magnet;
The expansion of Halbach magnet and outer Halbach magnet in Fig. 4.
Embodiment:
Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated:
A kind of no loss brshless DC motor unshakable in one's determination provided by the invention (as shown in Figure 1), the drag cup stator (102), interior Halbach magnet (103), armature spindle (104) and the magnetic shield tube (105) that comprise outer Halbach magnet (101), form by winding and skeleton.Outer Halbach magnet (101) all is connected on the armature spindle (104) by magnetic shield tube (105) with interior Halbach magnet (103), make outer Halbach magnet (101) and the same armature spindle of interior commentaries on classics Halbach magnet (103) (104) rotate synchronously, drag cup (102) stator is fixed on the casing (106).The internal diameter of outer Halbach magnet (101) greater than with the external diameter of interior Halbach magnet (103), both are installed in the inner surface of magnetic shield tube (105).Magnetic flux constitutes closed magnetic circuit through inside and outside Halbach magnet and the air gap between them.
A kind of no loss brshless DC motor unshakable in one's determination provided by the invention, the structural representation of its drag cup (102) as shown in Figure 2.Described drag cup stator is made up of winding (201) and skeleton (202), and skeleton (202) is a non-magnet material, on have groove, place the usefulness of Hall element (203).Need three Hall elements (203) altogether, be placed on electrical degree respectively and be in 120 ° the groove, be used for the detection rotor position.Winding (201) turns to chain type and is wrapped on the skeleton (202), and with epoxy resin (204) embedding.
A kind of no loss brshless DC motor unshakable in one's determination provided by the invention, the aluminium of used armature spindle (104) employing non-magnet material, titanium alloy etc. are made.Winding on the drag cup (201) with the good electromagnetic wire coiling of conduction after paint-dipping drying form.
A kind of no loss brshless DC motor unshakable in one's determination provided by the invention, the principle that wherein inside and outside Halbach magnet produces sinusoidal magnetic field is: adopt the mode that magnetizes as shown in Figure 4, inside and outside Halbach magnet poles number is identical, and each magnetic pole is made of 3 Halbach magnets.Outer Halbach magnet magnetization radial component
The magnetic field that produces in air gap is with interior Halbach magnet magnetization radial component
The magnetic field that produces in air gap superposes mutually, outer Halbach magnet magnetization tangential component
The magnetic field that produces in air gap is with interior Halbach magnet magnetization tangential component
Cancelling each other in the magnetic field that produces in air gap, produces high-intensity sinusoidal air gap flux density.
Claims (6)
1. no loss brshless DC motor unshakable in one's determination, the drag cup stator (102), interior Halbach magnet (103), armature spindle (104) and the magnetic shield tube (105) that it is characterized in that comprising outer Halbach magnet (101), form by winding and skeleton.
2. outer Halbach magnet according to claim 1 (101) links to each other with armature spindle (104) by magnetic shield tube (105) respectively with interior Halbach magnet (103), make outer Halbach magnet (101) and the same armature spindle of interior Halbach magnet (103) (104) rotate synchronously, drag cup (102) stator is fixed on the casing (106).
3. the internal diameter of outer Halbach magnet according to claim 2 (101) greater than with the external diameter of interior Halbach magnet (103), both are installed in the inner surface of magnetic shield tube (105), outer Halbach magnet (101) is identical with interior Halbach magnet (103) number of pole-pairs, be p, under polar coordinates outside the magnetization of Halbach magnet be:
The magnetization of interior Halbach magnet is:
4. according to the brshless DC motor of claims 1 described no loss unshakable in one's determination, it is characterized in that permanent magnet adopts outer Halbach magnet (101) and interior Halbach magnet (103), the magnetic field that outer Halbach magnet (101) magnetization radial component produces in air gap, the magnetic field that produces in air gap with interior Halbach magnet (103) magnetization radial component superposes mutually, the magnetic field that outer Halbach magnet (101) magnetization tangential component produces in air gap, cancel each other with the magnetic field that interior Halbach magnet (103) magnetization tangential component produces in air gap, produce high-intensity sinusoidal air gap flux density.
5. the number of poles according to the interior outer magnetic pole of claims 1 described no loss brshless DC motor unshakable in one's determination is identical, and each magnetic pole is counted magnet by same block and formed.
6. adopt the aluminium, titanium alloy etc. of non-magnet material to make according to right 1 described armature spindle (104).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010610875 CN102013781A (en) | 2010-12-29 | 2010-12-29 | Brushless direct current motor with internal and external rotors and without core losses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010610875 CN102013781A (en) | 2010-12-29 | 2010-12-29 | Brushless direct current motor with internal and external rotors and without core losses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102013781A true CN102013781A (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010610875 Pending CN102013781A (en) | 2010-12-29 | 2010-12-29 | Brushless direct current motor with internal and external rotors and without core losses |
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| CN (1) | CN102013781A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340206A (en) * | 2011-09-28 | 2012-02-01 | 王子齐 | AC (Alternating Current) and DC (Direct Current) integrated permanent-magnet super-energy power motor integrating functions of dragging, frequency converting and speed regulating for vehicles and ships |
| CN102420483A (en) * | 2011-12-21 | 2012-04-18 | 铜陵浩岩节能科技有限公司 | Rotor of low-speed high-power motor |
| CN104659991A (en) * | 2015-03-09 | 2015-05-27 | 刘霄 | Rare-earth radial energy-gathering magnetic energy-saving motor free of iron cores |
| CN104753274A (en) * | 2013-12-26 | 2015-07-01 | 北京奇峰聚能科技有限公司 | High-power coreless motor with heat conducting structure |
| CN107134908A (en) * | 2017-02-20 | 2017-09-05 | 北方工业大学 | Magnetic driving device |
| CN107306072A (en) * | 2016-04-25 | 2017-10-31 | 深圳市科卫泰实业发展有限公司 | A kind of outer rotor brushless motor |
| CN110233556A (en) * | 2019-07-12 | 2019-09-13 | 深圳市鑫宝达电机有限公司 | A kind of bimorph transducer magnetic field permanent magnet DC hollow cup motor |
Citations (4)
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|---|---|---|---|---|
| CN1645719A (en) * | 2004-12-30 | 2005-07-27 | 山东大学 | Permanent magnet electric motor with double rotor |
| CN1707921A (en) * | 2004-12-30 | 2005-12-14 | 北京航空航天大学 | Non-stator iron core brushless DC motor |
| CN101159400A (en) * | 2007-10-15 | 2008-04-09 | 北京航空航天大学 | Torque motor for satellite antenna pointing mechanism |
| CN101707405A (en) * | 2009-11-30 | 2010-05-12 | 哈尔滨工业大学 | Halbach array external rotor of composite-structure permanent magnet motor |
-
2010
- 2010-12-29 CN CN 201010610875 patent/CN102013781A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1645719A (en) * | 2004-12-30 | 2005-07-27 | 山东大学 | Permanent magnet electric motor with double rotor |
| CN1707921A (en) * | 2004-12-30 | 2005-12-14 | 北京航空航天大学 | Non-stator iron core brushless DC motor |
| CN101159400A (en) * | 2007-10-15 | 2008-04-09 | 北京航空航天大学 | Torque motor for satellite antenna pointing mechanism |
| CN101707405A (en) * | 2009-11-30 | 2010-05-12 | 哈尔滨工业大学 | Halbach array external rotor of composite-structure permanent magnet motor |
Non-Patent Citations (1)
| Title |
|---|
| 《微电机》 20060731 孙秋霞等 Halbach磁体结构的外转子永磁电机设计分析 第39卷, 第07期 2 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340206A (en) * | 2011-09-28 | 2012-02-01 | 王子齐 | AC (Alternating Current) and DC (Direct Current) integrated permanent-magnet super-energy power motor integrating functions of dragging, frequency converting and speed regulating for vehicles and ships |
| CN102340206B (en) * | 2011-09-28 | 2013-10-16 | 王子齐 | AC (Alternating Current) and DC (Direct Current) integrated permanent-magnet super-energy power motor integrating functions of dragging, frequency converting and speed regulating for vehicles and ships |
| CN102420483A (en) * | 2011-12-21 | 2012-04-18 | 铜陵浩岩节能科技有限公司 | Rotor of low-speed high-power motor |
| CN104753274A (en) * | 2013-12-26 | 2015-07-01 | 北京奇峰聚能科技有限公司 | High-power coreless motor with heat conducting structure |
| CN104659991A (en) * | 2015-03-09 | 2015-05-27 | 刘霄 | Rare-earth radial energy-gathering magnetic energy-saving motor free of iron cores |
| CN107306072A (en) * | 2016-04-25 | 2017-10-31 | 深圳市科卫泰实业发展有限公司 | A kind of outer rotor brushless motor |
| CN107134908A (en) * | 2017-02-20 | 2017-09-05 | 北方工业大学 | Magnetic driving device |
| CN107134908B (en) * | 2017-02-20 | 2019-02-26 | 北方工业大学 | Magnetic driving device |
| CN110233556A (en) * | 2019-07-12 | 2019-09-13 | 深圳市鑫宝达电机有限公司 | A kind of bimorph transducer magnetic field permanent magnet DC hollow cup motor |
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Application publication date: 20110413 |