CN104092344A - Brushless motor with built-in Hall sensor - Google Patents
Brushless motor with built-in Hall sensor Download PDFInfo
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- CN104092344A CN104092344A CN201410286032.2A CN201410286032A CN104092344A CN 104092344 A CN104092344 A CN 104092344A CN 201410286032 A CN201410286032 A CN 201410286032A CN 104092344 A CN104092344 A CN 104092344A
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Abstract
A brushless motor with a built-in Hall sensor is characterized by being composed of a stator and a rotator, an air gap exists between the stator and the rotor, the stator is composed of a stator shell, a stator iron core, a stator coil, a stator framework and the Hall sensor, the Hall sensor is fixed to the stator framework, the stator coil is wound on the stator framework, and the rotor is composed of a rotor iron core, a rotor lining and a permanent magnet. The Hall sensor is internally arranged in the stator, the relative positions of the stator coil and the Hall sensor can be fixed through the glue potting and curing process, and therefore the problem of brushless motor phase commutation deviation caused by position offset of the sensor is avoided, and meanwhile the step of installing and regulating an external Hall sensor is omitted, so that reliability and use convenience of the brushless motor are remarkably improved.
Description
Technical field
The present invention relates to a kind of brushless electric machine of built-in Hall element, can be used for high, low speed brushless electric machine, be applicable to various motors and drive field.
Background technology
Brushless electric machine, owing to having saved the brush power transmitting device of traditional direct current machine, has replaced mechanical commutation with electronics commutation, makes the contact of rotor machinery-free, is having significant advantage aspect reliability and long-life.
Electronics commutation can adopt position-sensor-free scheme, adopts back-emf method to obtain rotor-position, but this kind of method is difficult to realize in low speed occasion effect.
The more brushless electric machine of at present application adopts Hall element commutation, has that circuit is simple and easy, the simple advantage of algorithm.But the motor position sensor of prior art is generally separated with motor body, adopt outer sensor scheme, need to after motor installation, to transducer, install separately.Owing to there is angle position relation in transducer and motor stator winding, therefore this mounting means need to carry out independent adjusting to Hall element, and after installation, may there is the skew of angle, easily cause commutation skew, cause the torque coefficient of motor to occur larger fluctuation.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome prior art deficiency, a kind of brushless electric machine of built-in Hall element is provided, stator winding and transducer are solidified togather, removed the process regulating from, improved reliability; Because the positional precision of transducer is higher, effectively reduce the torque fluctuations of motor.
Technical solution of the present invention is: a kind of brushless electric machine of built-in Hall element, comprising: stator and rotor;
Wherein stator comprises stator case, stator core, Hall element, stator coil and stator skeleton, and rotor comprises permanent magnet, rotor core and rotor bushing;
Stator case and stator core are circular ring structure, and stator core interference is arranged in stator case;
Stator skeleton is all circular ring structures of spline laterally, the end face of stator skeleton has groove along axis, Hall element is arranged in the groove of stator skeleton end face, described stator skeleton end face is along the groove of axis and the quantity of Hall element, and Hall element is arranged according to 120 degree electric angles;
Stator coil winding is in stator skeleton week teeth groove laterally, and Hall element, stator coil and stator skeleton form winding sensor assembly;
Winding sensor assembly is arranged on stator core inside, and stator case, stator core and winding sensor assembly are coaxial;
Rotor core and rotor bushing are circular ring structure, and rotor bushing is arranged in stator core, and permanent magnet is evenly arranged in the circumferential side wall of rotor core, and the end face of permanent magnet is concordant laterally with the week of rotor core; The material of described permanent magnet is rare-earth permanent magnet, and permanent magnet adopts N, the S utmost point to be alternately distributed mode, radially magnetizes, and after magnetizing, carries out the steady magnetic treatment of high temperature, guarantees the stability of magnetic property;
Permanent magnet and rotor core form permanent magnet assembly, and permanent magnet assembly interference is arranged in rotor bushing;
Stator and rotor coaxial are installed, and are air gap between stator and rotor, machinery-free contact.
Described stator core is selected silicon steel sheet, electrical pure iron or 1J50.
The material of described stator skeleton is phenolic aldehyde glass-cloth board.
Described stator coil is divided into three groups, and three groups of coils are arranged by 120 ° of electric angles.
Described stator skeleton end face along the form and position tolerance precision of the groove of axis is: ± 5 '.
The present invention's beneficial effect is compared with prior art:
(1) brushless electric machine of built-in Hall element, makes transducer become as a whole with motor, simplifies the structure, and has improved reliability;
(2) transducer is solidificated in stator interior, once keep stable angular relationship, the position deviation problem of having avoided outer sensor long-play to cause with stator winding position after moulding;
(3) stator coil winding is arranged on the winding assembly of stator coil and stator skeleton composition in stator core after stator skeleton again, the mode of rear coiling is first installed with traditional silicon steel disc stator skeleton and compares, and rolls off the production line easy to operate.
(4) method of slotting by skeleton makes sensing station reliable and stable, simple in structure, and has removed debug process repeatedly from.
Accompanying drawing explanation
Fig. 1 is built-in Hall element brushless motor structure schematic diagram of the present invention;
Fig. 2 is stator skeleton profile of the present invention;
Fig. 3 is rotor profiles figure of the present invention;
Fig. 4 is brushless electric motor rotor magnetic circuit schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described in detail.
As shown in Figure 1, the brushless electric machine of a kind of built-in Hall element of the present invention, is comprised of stator and rotor,
Wherein stator comprises stator case 1, stator core 2, Hall element 3, stator coil 4 and stator skeleton 5, and rotor comprises permanent magnet 6, rotor core 7 and rotor bushing 8;
Stator case 1 and stator core 2 are circular ring structure, and stator core 2 interference are arranged in stator case 1;
Stator skeleton 5 is all circular ring structures of spline laterally, the end face of stator skeleton 5 has groove along axis, Hall element 3 is arranged in the groove of stator skeleton 5 end faces, stator coil 4 is wound in stator skeleton 5 weeks groove laterally, and Hall element 3, stator coil 4 and stator skeleton 5 form winding sensor assemblies;
Winding sensor assembly is arranged on stator core 2 inside, afterwards stator is carried out to encapsulating or mopping to reach the object of protection winding, and stator case 1, stator core 2 and winding sensor assembly are coaxial;
Rotor core 7 and rotor bushing 8 are circular ring structure, rotor bushing 8 is arranged in stator core 2, permanent magnet 6 is evenly arranged in the circumferential side wall of rotor core 7, and according to N, S utmost point alternative arrangement, the end face of permanent magnet 6 is concordant laterally with the week of rotor core 7;
Permanent magnet 6 and rotor core 7 form permanent magnet assembly, and permanent magnet assembly interference is arranged in rotor bushing 8;
Stator and rotor coaxial are installed, machinery-free contact between stator and rotor.
The present invention's good material of stator core 2 use magnetic property used is made, as magnetic materials such as silicon steel sheet, electrical pure iron, 1J50, the material of stator skeleton 5 is phenolic aldehyde glass-cloth board, the good electrical pure iron of rotor core 7 use magnetic property is made, and the material of permanent magnet 6 is the rare-earth permanent magnet that magnetic property is good, and permanent magnet is according to the requirement of motor number of pole-pairs, adopt N, the S utmost point to be alternately distributed mode, radially magnetize, and after magnetizing, need the steady magnetic treatment of high temperature, guarantee the stability of magnetic property.
Be illustrated in figure 2 stator skeleton 5 profiles of the present invention, the end face of stator skeleton 5 has groove along axis, forms skeleton tooth and Hull cell, and skeleton tooth is for coiling, and Hull cell is for placing and fixing Hall element.Stator coil is wound in the groove between skeleton tooth according to three-phase phase-sequence according to pitch, three groups of coils are arranged by 120 ° of electric angles, and Hall element is placed in Hull cell, and is fixed, three Hull cells are arranged by 120 degree electric angles, and the form and position tolerance precision of Hull cell is: ± 5 '.
Be illustrated in figure 3 rotor profiles figure of the present invention; 8 pairs of rotor permanent magnets 6 are alternately arranged in the circumferential side wall of rotor core 7 with N, S; permanent magnet and rotor core form core assembly, and permanent magnet circumference is protected with rotor bushing, makes permanent magnet not be vulnerable to collide with.
If Fig. 4 is brushless electric motor rotor magnetic circuit schematic diagram of the present invention, rotor field is from the N utmost point of permanent magnet 6, along the air gap between rotor, stator coil 5, stator core 2, get back to the S utmost point, the rotor core 7 of stator coil 2, air gap, permanent magnet 6, the N utmost point of permanent magnet 6, form closed magnetic circuit.Wherein Hall element 3 is embedded in stator coil inside, therefore can induced field direction, N, S utmost point position for detection of rotor, three Hall elements are exported respectively high and low level signal, form altogether 8 kinds of different conditions, every kind of state is determined a kind of stator energising phase sequence, and the stator field producing is tried one's best and rotor field quadrature, forms continuous breakdown torque.
Operation principle of the present invention is:
During work, the stationary part of the brushless electric machine of a kind of built-in Hall element proposing in the present invention is fixed, and the driving shaft of external equipment, through rotor core 7, is fixedly connected with rotor core 7;
After working on power, external power source is to Hall element 3 power supply in stator, and the magnetic direction of Hall element 3 detection rotors is determined the energising phase sequence of stator coil 4 in stator, and stator coil 4 energisings, produce the stator field with rotor field direction quadrature;
Magnetic field interaction between stator and rotor, produces the moment that drives rotor to rotate, and makes rotor, by the drive shaft external equipment being fixedly connected with, works.
Claims (5)
1. a brushless electric machine for built-in Hall element, is characterized in that comprising: stator and rotor;
Wherein stator comprises stator case (1), stator core (2), Hall element (3), stator coil (4) and stator skeleton (5), and rotor comprises permanent magnet (6), rotor core (7) and rotor bushing (8);
Stator case (1) and stator core (2) are circular ring structure, and stator core (2) interference is arranged in stator case (1);
Stator skeleton (5) is all circular ring structures of spline laterally, the end face of stator skeleton (5) has groove along axis, Hall element (3) is arranged in the groove of stator skeleton (5) end face, described stator skeleton (5) end face is 3 along the groove of axis and the quantity of Hall element (3), and Hall element (3) is arranged according to 120 degree electric angles;
Stator coil (4) is wound in stator skeleton (5) week teeth groove laterally, and Hall element (3), stator coil (4) and stator skeleton (5) form winding sensor assembly;
Winding sensor assembly is arranged on stator core (2) inside, and stator case (1), stator core 2 and winding sensor assembly are coaxial;
Rotor core (7) and rotor bushing (8) are circular ring structure, rotor bushing 8 is arranged in stator core (2), permanent magnet (6) is evenly arranged in the circumferential side wall of rotor core (7), and the end face of permanent magnet (6) is concordant laterally with the week of rotor core (7); The material of described permanent magnet (6) is rare-earth permanent magnet, and permanent magnet (6) adopts N, the S utmost point to be alternately distributed mode, radially magnetizes, and after magnetizing, carries out the steady magnetic treatment of high temperature, guarantees the stability of magnetic property;
Permanent magnet (6) and rotor core (7) form permanent magnet assembly, and permanent magnet assembly interference is arranged in rotor bushing (8);
Stator and rotor coaxial are installed, and are air gap (9) between stator and rotor, machinery-free contact.
2. the brushless electric machine of a kind of built-in Hall element according to claim 1, is characterized in that: described stator core (2) is selected silicon steel sheet, electrical pure iron or 1J50.
3. the brushless electric machine of a kind of built-in Hall element according to claim 1, is characterized in that: the material of described stator skeleton (5) is phenolic aldehyde glass-cloth board.
4. the brushless electric machine of a kind of built-in Hall element according to claim 1, is characterized in that: described stator coil (4) is divided into three groups, and three groups of coils are arranged by 120 ° of electric angles.
5. the brushless electric machine of a kind of built-in Hall element according to claim 1, is characterized in that: described stator skeleton (5) end face along the form and position tolerance precision of the groove of axis is: ± 5 '.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410286032.2A CN104092344A (en) | 2014-06-24 | 2014-06-24 | Brushless motor with built-in Hall sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410286032.2A CN104092344A (en) | 2014-06-24 | 2014-06-24 | Brushless motor with built-in Hall sensor |
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| Publication Number | Publication Date |
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| CN104092344A true CN104092344A (en) | 2014-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410286032.2A Pending CN104092344A (en) | 2014-06-24 | 2014-06-24 | Brushless motor with built-in Hall sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634234A (en) * | 2015-12-29 | 2016-06-01 | 赵浩 | Brushless DC tachometer generator |
| WO2018033025A1 (en) * | 2016-08-18 | 2018-02-22 | 杭州三花研究院有限公司 | Electronic expansion valve, control system, and control method |
| CN109842245A (en) * | 2019-01-22 | 2019-06-04 | 上海拓为汽车技术有限公司 | A kind of permanent magnet machine rotor position-measurement device and method |
| CN110289745A (en) * | 2019-07-25 | 2019-09-27 | 苏州金莱克汽车电机有限公司 | A kind of brushless motor with modified tone formula commutation angle |
| CN110557054A (en) * | 2019-09-29 | 2019-12-10 | 天地伟业技术有限公司 | Dynamic control method for torque of direct current brushless motor |
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| CN2786861Y (en) * | 2005-02-02 | 2006-06-07 | 核工业理化工程研究院华核新技术开发公司 | Rare earth permanent-magnetic brushless direct current motor |
| US20070188039A1 (en) * | 2004-10-28 | 2007-08-16 | Nidec Corporation | Motor Armature Manufacturing Method |
| CN101388590A (en) * | 2008-07-14 | 2009-03-18 | 许晓华 | Hall device for DC brushless motor |
| CN202772692U (en) * | 2011-12-21 | 2013-03-06 | 宁波亿诺宝机电有限公司 | Insulating frame of motor stator |
| US20130106237A1 (en) * | 2010-05-04 | 2013-05-02 | New Motech Co., Ltd. | Stator assembly for motor |
| JP2013110846A (en) * | 2011-11-21 | 2013-06-06 | Minebea Co Ltd | Motor |
| CN103166334A (en) * | 2011-12-08 | 2013-06-19 | 陈伟禧 | Split-type motor stator and motor |
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2014
- 2014-06-24 CN CN201410286032.2A patent/CN104092344A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070188039A1 (en) * | 2004-10-28 | 2007-08-16 | Nidec Corporation | Motor Armature Manufacturing Method |
| CN2786861Y (en) * | 2005-02-02 | 2006-06-07 | 核工业理化工程研究院华核新技术开发公司 | Rare earth permanent-magnetic brushless direct current motor |
| CN101388590A (en) * | 2008-07-14 | 2009-03-18 | 许晓华 | Hall device for DC brushless motor |
| US20130106237A1 (en) * | 2010-05-04 | 2013-05-02 | New Motech Co., Ltd. | Stator assembly for motor |
| JP2013110846A (en) * | 2011-11-21 | 2013-06-06 | Minebea Co Ltd | Motor |
| CN103166334A (en) * | 2011-12-08 | 2013-06-19 | 陈伟禧 | Split-type motor stator and motor |
| CN202772692U (en) * | 2011-12-21 | 2013-03-06 | 宁波亿诺宝机电有限公司 | Insulating frame of motor stator |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634234A (en) * | 2015-12-29 | 2016-06-01 | 赵浩 | Brushless DC tachometer generator |
| CN105634234B (en) * | 2015-12-29 | 2018-10-23 | 嘉兴学院 | A kind of brushless DC tachometer generator |
| WO2018033025A1 (en) * | 2016-08-18 | 2018-02-22 | 杭州三花研究院有限公司 | Electronic expansion valve, control system, and control method |
| US10935155B2 (en) | 2016-08-18 | 2021-03-02 | Hangzhou Sanhua Research Institute Co., Ltd. | Electronic expansion valve, control system, and control method |
| US11448335B2 (en) | 2016-08-18 | 2022-09-20 | Hangzhou Sanhua Research Institute Co., Ltd. | Electronic expansion valve, control system, and control method |
| CN109842245A (en) * | 2019-01-22 | 2019-06-04 | 上海拓为汽车技术有限公司 | A kind of permanent magnet machine rotor position-measurement device and method |
| CN110289745A (en) * | 2019-07-25 | 2019-09-27 | 苏州金莱克汽车电机有限公司 | A kind of brushless motor with modified tone formula commutation angle |
| CN110557054A (en) * | 2019-09-29 | 2019-12-10 | 天地伟业技术有限公司 | Dynamic control method for torque of direct current brushless motor |
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Application publication date: 20141008 |