CN101355283A - Permanent-magnet brushless DC motor - Google Patents
Permanent-magnet brushless DC motor Download PDFInfo
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- CN101355283A CN101355283A CNA200710075342XA CN200710075342A CN101355283A CN 101355283 A CN101355283 A CN 101355283A CN A200710075342X A CNA200710075342X A CN A200710075342XA CN 200710075342 A CN200710075342 A CN 200710075342A CN 101355283 A CN101355283 A CN 101355283A
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Abstract
The invention relates to a permanent-magnetic brushless direct current motor which comprises a shell, a front end cover, a rear end cover, a stator, a rotor, and a position sensor, wherein the stator comprises a stator iron core and a winding, the inner side of the stator iron core is provided with a plurality of tooth grooves, the winding passes through the tooth grooves; the rotor comprises a rotating shaft, a rotor iron core and at least one pair of magnetic steels, the rotor iron core is sleeved on the rotating shaft, the magnetic steels are arranged at the periphery of the rotor iron core; and the position sensor comprises a circuit board and a Hall element connected with the circuit board, wherein magnetic conduction inlaid strips used for magnetic conduction are arranged in the tooth grooves of the stator iron core, the cross sections of the magnetic steels of the rotor have an arc shape the thickness at the middle part of which is more than those at both sides, and the Hall element of the position sensor is close to end parts of the magnetic steels of the rotor and takes the magnetic leakage of the magnetic steels of the rotor as a running signal of the Hall element. The permanent-magnetic brushless direct current motor can effectively save production cost and improve the working performance of the motor.
Description
Technical field
The present invention relates to a kind of motor, relate in particular to a kind of brushless, permanently excited direct current motor.
Background technology
Brushless, permanently excited direct current motor is the electromechanical integration New-type electric machine that electronic technology and conventional motors technology combine, it has identical linear mechanical characteristic with traditional brush motor, but also have speed-regulating range width, preferable performances such as staring torque is big, efficient is high, easy control, therefore obtained using widely.
Brushless, permanently excited direct current motor mainly is made up of stator, rotor and position transducer.Wherein, stator comprises stator core and winding, and rotor comprises rotating shaft, rotor core and magnet steel, and position transducer comprises wiring board and Hall element.In the brushless, permanently excited direct current motor of routine, stator core be adopt that silicon steel sheet makes change riveting or be welded of groove punching arranged, and the magnet steel shape that magnetic property is stronger in the rotor adopts star more, cylindrical shape, rectangle or watt shape, yet the kind of magnet steel, shape, the groove number of size and stator core, shape, size has close association, both proper motors of arranging in pairs or groups operate steadily and easy and flexible, otherwise then bigger magnetic resistance moment can appear, and existing stator core is because the existence of teeth groove can cause the motor air gap magnetic conductance inhomogeneous, therefore magnetic resistance moment is existed all the time, and existing rotor magnetic steel owing to the reason of shape makes poly-magnetic weak effect, leakage field is big between the magnetic pole, and the assembly technology performance is poor.
In the existing brushless, permanently excited direct current motor, position transducer receives the magnetic pole signal and normally utilizes epitrochanterian magnet steel to produce the magnetic pole signal, or installing auxiliary magnet steel on motor shaft additional provides the magnetic pole signal for position transducer specially.In this dual mode, the preceding a kind of or length of need increase motor, need Hall element is inserted in the stator coring groove, then a kind ofly need die sinking to produce, therefore in above-mentioned design, if increase the length or the die sinking production of motor, will increase cost, if Hall element is inserted in the stator coring groove,, will make the work of Hall element become unreliable because stator core can produce high temperature in the continuous operation of motor.Therefore, no matter brushless, permanently excited direct current motor of the prior art is that stator, rotor or position transducer all have perfect inadequately performance.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of brushless, permanently excited direct current motor, is not increasing under the condition of cost, can effectively improve motor performance.
Goal of the invention of the present invention is achieved through the following technical solutions:
Brushless, permanently excited direct current motor of the present invention comprises casing, front end housing, rear end cap, stator, rotor and position transducer, described front end housing and described rear end cap are installed on the two ends of described casing respectively, described stator, rotor and position transducer all are arranged in the described casing, wherein, described stator comprises stator core and winding, the inboard of described stator core is provided with a plurality of teeth groove, and be installed with described winding in the described teeth groove, described rotor comprises rotating shaft, rotor core and at least one pair of magnet steel, described rotor core is socketed in the described rotating shaft, and described magnet steel is arranged at the periphery of rotor core, described position transducer comprises circuit board and the Hall element that links to each other with circuit board, it is characterized in that: be provided with the magnetic conduction panel that is used for magnetic conduction in the teeth groove of described stator core, the cross section of described rotor magnetic steel is the arc of interior thickness greater than two edges thickness, the Hall element of described position transducer is adjacent to the end of described rotor magnetic steel, and with the leakage field of the described rotor magnetic steel run signal as Hall element.
On the said structure basis, wherein:
Described magnetic conduction panel is strip, is arranged at the notch place of described teeth groove, and described teeth groove is inboard is provided with slot wedge near the engaging of described notch place, and firmly is connected between described magnetic conduction panel and the described slot wedge.
The width of described magnetic conduction panel equates that with the width of described teeth groove notch the axial length of described magnetic conduction panel equates with the axial length of described stator core, and the outer surface of described magnetic conduction panel is equal with the interior circle of described stator core.
Described rotor core and the contacted surface of described magnet steel are all the plane, and described magnet steel and the contacted surface of described rotor core also are the plane.
The ratio of the thickness in the middle of the thickness of described magnet steel two edges and the magnet steel is in 0～1/3 scope.
Described rotor core is provided with location notch, is used for the bottom of ccontaining described magnet steel, prevents that described magnet steel breaks away from described rotor core, and the length of magnet steel equates with the axial length of rotor core.
Magnet steel polarity adjacent in the described rotor core is alternate, and described rotor core has sunk area between adjacent magnet steel.
Have spacing between described circuit board and the described magnet steel end, described spacing makes Hall element can receive the leakage field of magnet steel end.
Described circuit board middle part has path, and an end of described rotating shaft passes the path of described circuit board, and is positioned on the described rear end cap by bearing, and the other end is positioned on the described front end housing by another bearing.
Have the support portion on the described rear end cap, the bearing wall that is used for ccontaining bearing certainly stretches out, and described circuit board is fixedly installed on the support portion of described rear end cap inboard.
Brushless, permanently excited direct current motor of the present invention, by the magnetic conduction panel is set in the teeth groove of stator core, can effectively reduce magnetic resistance moment, improve magnetic electricity performance, and the design of employing arc magnet steel, make that the center magnetic force of rotor magnetic steel is the strongest, poly-magnetic effect is more concentrated, thereby can reduce the magnet steel cost, promote motor performance, at last by utilizing position transducer to be adjacent to the design of rotor magnetic steel, can be directly with the leakage field of rotor magnetic pole end run signal as position transducer, thereby can effectively reduce cost, alleviate the assembly technology difficulty, and make motor have good service behaviour.
Description of drawings
In order to be easy to explanation, the present invention is done to describe in detail by following preferred embodiment and accompanying drawing.
Fig. 1 is the three-dimensional exploded view of brushless, permanently excited direct current motor of the present invention;
Fig. 2 is the generalized section after the brushless, permanently excited direct current motor assembling of the present invention;
Fig. 3 is the partial enlarged drawing of brushless, permanently excited direct current motor stator of the present invention;
Fig. 4 is the generalized section after the rotor of brushless, permanently excited direct current motor of the present invention is assembled;
Fig. 5 is the schematic perspective view of the rotor magnetic steel of brushless, permanently excited direct current motor of the present invention;
Fig. 6 is the poly-magnetic effect schematic diagram of brushless, permanently excited direct current motor rotor of the present invention;
Fig. 7 is the generalized section of the position transducer and the rear end cap of brushless, permanently excited direct current motor of the present invention;
Fig. 8 is the front view of the circuit board of brushless, permanently excited direct current motor of the present invention.
Embodiment
Please consult Fig. 1 simultaneously and Figure 2 shows that brushless, permanently excited direct current motor of the present invention, it comprises casing 1, front end housing 2, rear end cap 3, stator 4, rotor 5 and position transducer 6.Described casing 1 is tubular, and stator 4, rotor 5 and position transducer 6 all are arranged at the inside of casing 1, and front end housing 2 and rear end cap 3 are installed on two openends of casing 1 respectively.
Please in conjunction with Fig. 1, Fig. 2, Fig. 4, shown in Figure 5, rotor 5 of the present invention comprises rotor core 50, magnet steel 52, steel bushing 54 and rotating shaft 56.The hollow bulb of rotor core 50 is passed in rotating shaft 56, and stretches out in the outer surface of front end housing 2 and rear end cap 3.Rotating shaft 56 is positioned on front end housing 2 and the rear end cap 3 by bearing 20,30, and is provided with wave spring washer 32 and a pair of adjustment packing ring 34 between bearing 30 and the rear end cap 3.
The cross section of rotor core 50 is the polygon with recess 500, and rotor core 50 has hollow bulb, is used to be socketed in rotating shaft 56.In the present embodiment, the cross section of rotor core 50 is the square with four recesses 500, and recess 500 is a circular arc camber.All be provided with the location notch (not shown) that caves inward on each side of rotor core 50, be used for the bottom of ccontaining magnet steel 52, promptly ccontaining magnet steel 52 edge thickness are the bottom at d2 place, can prevent that magnet steel 52 breaks away from described rotor core 50.
It is alternate to be surrounded between adjacent two magnet steel 52 in the rotor core 50 polarity.Rotor core 50 is all the plane with magnet steel 52 contacted surfaces, and magnet steel 52 also is the plane with rotor core 50 contacted surfaces.In the present embodiment, the length of magnet steel 52 equates with the axial length of rotor core 50, and the two is fixedly connected by viscose glue.Rotor core 50 all has the sunk area of being made up of a plurality of recesses 500 500 at magnet steel 52 position adjacent places, the leakage field that is provided for reducing magnet steel 52 of sunk area 500.Described steel bushing 54 lock rings are in the outside of rotating shaft 56, rotor core 50 and magnet steel 52, in order to fixing and protection magnetic pole.
See also and Figure 6 shows that the poly-magnetic effect schematic diagram of brushless, permanently excited direct current motor rotor 5 of the present invention at open-circuit condition.The center magnetic force of rotor 5 magnet steel 52 is the strongest, and poly-magnetic effect is comparatively concentrated, thereby can reduce the magnet steel cost, promotes motor performance.
See also Fig. 7, be depicted as the generalized section of position transducer 6 with the rear end cap 3 of brushless, permanently excited direct current motor of the present invention.Described position transducer 6 is arranged at the inboard of rear end cap 3, and position transducer 6 comprises circuit board 60, Hall element 62 and lead-out wire 64 (please consulting shown in Figure 2 simultaneously).Hall element 62 is arranged on the circuit board 60, in the present embodiment, is by welding manner Hall element 62 to be fixed on the circuit board 60.Circuit board 60 is fixed on the rear end cap 3, and the middle part of rear end cap 3 has the bearing chamber that bearing wall 32 surrounds, and is used for the bearing 30 of ccontaining positioning rotating shaft 56.The bearing wall 32 of rear end cap 3 extends outward support portion 320, and described circuit board 60 is fixed on this support portion 320.In the present embodiment, circuit board 60 is fixed on the support portion 320 of rear end cap 3 by screw (figure does not show).Lead-out wire 64 is divided into two parts, and wherein a part links to each other with the circuit board 60 of this position transducer 6, and another part links to each other with stator 4.Lead-out wire 64 passes rear end cap 3, and fixes by sheath 640 between the two, plays the effect of protection lead-out wire 64.
Please consult Fig. 8 simultaneously, be depicted as the front view of the circuit board 60 of brushless, permanently excited direct current motor of the present invention.The middle part of circuit board 60 has path 600, can pass for the rotating shaft 56 of described rotor 5, and also be provided with the welding region 602 that is used to be provided with Hall element 62 on the circuit board 60, be used to the screw jack 606 that connects the fixed area 604 of lead-out wire 64 and be used for fixing circuit board 60.
Permanent magnet brushless electromotor of the present invention, circuit board 60 is fixed on the top of the support portion 320 that rear end cap 3 bearing walls 32 extend out, this moment, Hall element 62 was adjacent to the end of rotor magnetic steel 52, be used to gather the leakage field of magnet steel 52 ends, and with the leakage field of magnet steel 52 run signal as Hall element 62.During design of electrical motor, have a default spacing between circuit board 60 and the rotor magnetic steel 52, the size of this spacing need make Hall element 62 have the ability that receives magnet steel 52 brow leakages.
The stator 4 of brushless, permanently excited direct current motor of the present invention, the magnetic conduction panel 48 with stator core 40 same class materials is inlayed in employing in the teeth groove 400 of stator core 40, can effectively reduce magnetic resistance moment, improve magnetic electricity performance, when not installing magnetic conduction panel 48 additional, the motor no power, the motor shaft sleeve upper bush, be wrapped with cotton thread, adopt tensiometer to measure when motor shaft is evenly continuous to rotate, pulling force is 175g, when packing 1 magnetic conduction panel 48 in the teeth groove 400 in stator core 40 into, record the result under the same terms and be 70g, fact proved, behind the magnetic conduction panel 48 of in the teeth groove 400 of stator core 40, packing into, reduced the slot effect of motor, making has the brushless, permanently excited direct current motor of the brushless, permanently excited direct current motor of groove near the slotless form, thereby reaches the product instructions for use; The particular design that the rotor 5 of brushless, permanently excited direct current motor of the present invention adopts arc magnet steel 52 and rotor core 50 to cooperatively interact, make that the magnetic circuit of brushless, permanently excited direct current motor is reasonable, and the design of rotor core 50 upper magnetic steel location notchs 504, guaranteed the even distribution of magnet steel 52 in rotor core 50, especially the design of the sunk area of rotor core 50 between the adjacent magnet steel 52, can effectively reduce the leakage field of magnet steel, make that the magnet steel magnetic property is brought into play to greatest extent, thereby reduced the magnetic resistance moment of brushless, permanently excited direct current motor, motor is operated steadily, especially more apparent superior when low speed; And the position transducer 6 of brushless, permanently excited direct current motor of the present invention utilizes the extension of rear end cap 3 bearing walls 32, the circuit board 60 of position transducer 6 is installed on the top of bearing wall 32, can be directly with the leakage field of rotor 5 pole end piece as motor operation signal, cancelled the signal magnet steel of prior art, and shortened motor length, thereby effectively reduce production costs, alleviate the assembly technology difficulty; Therefore, above-described brushless, permanently excited direct current motor provides cost savings, and has effectively improved the service behaviour of motor.
The embodiment of the above is a better embodiment of the present invention, is not to limit concrete practical range of the present invention with this, and the equivalence that all shapes according to the present invention, structure are done changes all in protection scope of the present invention.
Claims (10)
1. brushless, permanently excited direct current motor, comprise casing, front end housing, rear end cap, stator, rotor and position transducer, described front end housing and described rear end cap are installed on the two ends of described casing respectively, described stator, rotor and position transducer all are arranged in the described casing, wherein, described stator comprises stator core and winding, the inboard of described stator core is provided with a plurality of teeth groove, and be installed with described winding in the described teeth groove, described rotor comprises rotating shaft, rotor core and at least one pair of magnet steel, described rotor core is socketed in the described rotating shaft, and described magnet steel is arranged at the periphery of rotor core, described position transducer comprises circuit board and the Hall element that links to each other with circuit board, it is characterized in that:
Be provided with the magnetic conduction panel that is used for magnetic conduction in the teeth groove of described stator core, the cross section of described rotor magnetic steel is the arc of interior thickness greater than two edges thickness, the Hall element of described position transducer is adjacent to the end of described rotor magnetic steel, and with the leakage field of the described rotor magnetic steel run signal as Hall element.
2. brushless, permanently excited direct current motor according to claim 1, it is characterized in that: described magnetic conduction panel is strip, be arranged at the notch place of described teeth groove, and described teeth groove is inboard is provided with slot wedge near the engaging of described notch place, and firmly is connected between described magnetic conduction panel and the described slot wedge.
3. brushless, permanently excited direct current motor according to claim 2, it is characterized in that: the width of described magnetic conduction panel equates with the width of described teeth groove notch, the axial length of described magnetic conduction panel equates with the axial length of described stator core, and the outer surface of described magnetic conduction panel is equal with the interior circle of described stator core.
4. brushless, permanently excited direct current motor according to claim 1 is characterized in that: described rotor core and the contacted surface of described magnet steel are all the plane, and described magnet steel and the contacted surface of described rotor core also are the plane.
5. brushless, permanently excited direct current motor according to claim 4 is characterized in that: the ratio of the thickness in the middle of the thickness of described magnet steel two edges and the magnet steel is in 0～1/3 scope.
6. brushless, permanently excited direct current motor according to claim 5, it is characterized in that: described rotor core is provided with location notch, the bottom that is used for ccontaining described magnet steel prevents that described magnet steel breaks away from described rotor core, and the length of magnet steel equates with the axial length of rotor core.
7. brushless, permanently excited direct current motor according to claim 6 is characterized in that: magnet steel polarity adjacent in the described rotor core is alternate, and described rotor core has sunk area between adjacent magnet steel.
8. brushless, permanently excited direct current motor according to claim 1 is characterized in that: have spacing between described circuit board and the described magnet steel end, described spacing makes Hall element can receive the leakage field of magnet steel end.
9. brushless, permanently excited direct current motor according to claim 8, it is characterized in that: described circuit board middle part has path, one end of described rotating shaft passes the path of described circuit board, and is positioned on the described rear end cap by bearing, and the other end is positioned on the described front end housing by another bearing.
10. brushless, permanently excited direct current motor according to claim 9 is characterized in that: have the support portion on the described rear end cap, the bearing wall that is used for ccontaining bearing certainly stretches out, and described circuit board is fixedly installed on the support portion of described rear end cap inboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710075342XA CN101355283A (en) | 2007-07-27 | 2007-07-27 | Permanent-magnet brushless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710075342XA CN101355283A (en) | 2007-07-27 | 2007-07-27 | Permanent-magnet brushless DC motor |
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| Publication Number | Publication Date |
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| CN101355283A true CN101355283A (en) | 2009-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA200710075342XA Pending CN101355283A (en) | 2007-07-27 | 2007-07-27 | Permanent-magnet brushless DC motor |
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| CN (1) | CN101355283A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158031A (en) * | 2011-03-30 | 2011-08-17 | 东元总合科技（杭州）有限公司 | High-power permanent magnet synchronous generator |
| CN102223044A (en) * | 2011-06-08 | 2011-10-19 | 天津大学 | Brushless double-fed motor with detectable rotor current |
| CN102347676A (en) * | 2010-07-30 | 2012-02-08 | 浙江三花股份有限公司 | Direct-current brushless motor and drainage pump |
| CN102694431A (en) * | 2012-05-25 | 2012-09-26 | 福建尤迪电机制造有限公司 | Novel high-power permanent magnet brushless motor |
| CN103944344A (en) * | 2014-05-21 | 2014-07-23 | 哈尔滨理工大学 | Four-pole brushless direct current position motor and detection method thereof |
| CN104979989A (en) * | 2014-04-11 | 2015-10-14 | 马渊马达株式会社 | Brushless motor |
| CN105071625A (en) * | 2015-07-31 | 2015-11-18 | 常州市昊升电机有限公司 | Novel high-speed brushless motor |
| CN105591477A (en) * | 2016-03-07 | 2016-05-18 | 常州杰信电机有限公司 | Brushless motor |
| CN108222932A (en) * | 2018-01-31 | 2018-06-29 | 湖北环电磁装备工程技术有限公司 | The cutting part of heading machine driving device that a kind of no frame permanent magnet synchronous motor directly drives |
| CN109245479A (en) * | 2018-10-30 | 2019-01-18 | 中国船舶重工集团公司第七0七研究所 | A kind of permanent-magnet DC brushless torque motor controlling satellite platform posture |
| CN109520414A (en) * | 2018-12-26 | 2019-03-26 | 上海索迪龙自动化有限公司 | Angular transducer |
| CN111556955A (en) * | 2018-01-04 | 2020-08-18 | Lg伊诺特有限公司 | Sensing device |
| CN112943698A (en) * | 2019-12-11 | 2021-06-11 | 鼎朋企业股份有限公司 | Air suction motor of dust suction device |
| CN114089231A (en) * | 2021-11-02 | 2022-02-25 | 湖南大学 | Magnetic sensor module, printed permanent magnet synchronous motor and application method thereof |
| CN114614611A (en) * | 2021-12-14 | 2022-06-10 | 苏州长风航空电子有限公司 | Angular displacement sensor sensitive assembly |
| CN114759699A (en) * | 2022-04-06 | 2022-07-15 | 江苏三江电器集团股份有限公司 | Plastic package BLDC clothes dryer motor |
-
2007
- 2007-07-27 CN CNA200710075342XA patent/CN101355283A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347676A (en) * | 2010-07-30 | 2012-02-08 | 浙江三花股份有限公司 | Direct-current brushless motor and drainage pump |
| CN102158031B (en) * | 2011-03-30 | 2013-08-21 | 东元总合科技（杭州）有限公司 | High-power permanent magnet synchronous generator |
| CN102158031A (en) * | 2011-03-30 | 2011-08-17 | 东元总合科技（杭州）有限公司 | High-power permanent magnet synchronous generator |
| CN102223044A (en) * | 2011-06-08 | 2011-10-19 | 天津大学 | Brushless double-fed motor with detectable rotor current |
| CN102694431A (en) * | 2012-05-25 | 2012-09-26 | 福建尤迪电机制造有限公司 | Novel high-power permanent magnet brushless motor |
| US10177632B2 (en) | 2014-04-11 | 2019-01-08 | Mabuchi Motor Co., Ltd. | Brushless motor |
| CN104979989A (en) * | 2014-04-11 | 2015-10-14 | 马渊马达株式会社 | Brushless motor |
| CN103944344A (en) * | 2014-05-21 | 2014-07-23 | 哈尔滨理工大学 | Four-pole brushless direct current position motor and detection method thereof |
| CN105071625A (en) * | 2015-07-31 | 2015-11-18 | 常州市昊升电机有限公司 | Novel high-speed brushless motor |
| CN105591477A (en) * | 2016-03-07 | 2016-05-18 | 常州杰信电机有限公司 | Brushless motor |
| CN111556955B (en) * | 2018-01-04 | 2023-11-14 | Lg伊诺特有限公司 | Sensing device |
| CN111556955A (en) * | 2018-01-04 | 2020-08-18 | Lg伊诺特有限公司 | Sensing device |
| CN108222932A (en) * | 2018-01-31 | 2018-06-29 | 湖北环电磁装备工程技术有限公司 | The cutting part of heading machine driving device that a kind of no frame permanent magnet synchronous motor directly drives |
| CN109245479A (en) * | 2018-10-30 | 2019-01-18 | 中国船舶重工集团公司第七0七研究所 | A kind of permanent-magnet DC brushless torque motor controlling satellite platform posture |
| CN109520414A (en) * | 2018-12-26 | 2019-03-26 | 上海索迪龙自动化有限公司 | Angular transducer |
| CN112943698A (en) * | 2019-12-11 | 2021-06-11 | 鼎朋企业股份有限公司 | Air suction motor of dust suction device |
| CN114089231A (en) * | 2021-11-02 | 2022-02-25 | 湖南大学 | Magnetic sensor module, printed permanent magnet synchronous motor and application method thereof |
| CN114614611A (en) * | 2021-12-14 | 2022-06-10 | 苏州长风航空电子有限公司 | Angular displacement sensor sensitive assembly |
| CN114614611B (en) * | 2021-12-14 | 2023-09-08 | 苏州长风航空电子有限公司 | Angular displacement sensor sensitive assembly |
| CN114759699A (en) * | 2022-04-06 | 2022-07-15 | 江苏三江电器集团股份有限公司 | Plastic package BLDC clothes dryer motor |
| CN114759699B (en) * | 2022-04-06 | 2022-11-25 | 江苏三江电器集团股份有限公司 | Plastic package BLDC clothes dryer motor |
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Open date: 20090128 |