CN105305760A - Rotor structure used for tangential permanent magnet direct current brushless motor, and tangential permanent magnet direct current brushless motor - Google Patents
Rotor structure used for tangential permanent magnet direct current brushless motor, and tangential permanent magnet direct current brushless motor Download PDFInfo
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- CN105305760A CN105305760A CN201510763578.7A CN201510763578A CN105305760A CN 105305760 A CN105305760 A CN 105305760A CN 201510763578 A CN201510763578 A CN 201510763578A CN 105305760 A CN105305760 A CN 105305760A
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Abstract
The invention discloses a rotor structure used for a tangential permanent magnet direct current brushless motor, and the tangential permanent magnet direct current brushless motor. The rotor structure comprises a rotor iron core, tangential permanent magnets and a rotation shaft; an even number of tangential permanent magnet grooves are formed in the circumference of the rotor iron core radially at the equal intervals; the tangential permanent magnets with the opposite polarities are arranged in the adjacent tangential permanent magnet grooves; the tangential permanent magnets are connected with or disconnected from the near air gap side; the central symmetry of the rotor iron core is maintained; the sides, close to the rotation shaft, of the tangential permanent magnet grooves are communicated with flux-insulation grooves on the two sides of the tangential permanent magnet grooves; the near air gap side of the flux-insulation grooves and the central line of the corresponding tangential permanent magnet grooves extend outwardly at an angle of alpha; and a radially-distributed flux-insulation bridge is formed between the adjacent flux-insulation grooves. The rotor structure used for the tangential permanent magnet direct current brushless motor is simple and compact in structure, small in magnetic leakage factor, high in mechanical strength, convenient to produce, low in manufacturing cost, higher in resistance to demagnetization, and high in overload capacity, so that the tangential permanent magnet direct current brushless motor is higher in torque/current ratio, torque/volume ratio and motor efficiency; and therefore, the rotor structure used for the tangential permanent magnet direct current brushless motor, and the tangential permanent magnet direct current brushless motor are brighter in the application prospects.
Description
Technical field
The present invention relates to DC brushless motor component technology field, be specifically related to a kind of rotor structure for tangential permanent magnetic DC brushless motor and motor thereof.
Background technology
Tangential permanent magnetic DC brushless motor has " poly-magnetic " effect due to it, therefore, higher air gap flux density is produced than radial motor rotor construction, and, unique saliency ratio of tangential permanent magnetic DC brushless motor, larger reluctance torque can be produced, make motor have larger torque/current ratio, torque/volume ratio and weak magnetism speed expansion characteristic, so obtain research and apply widely.
At present, the limitation that the rotor structure ubiquity in tangential permanent magnetic DC brushless motor is more, specific as follows, (1) magnetic leakage factor is comparatively large, and especially near the inner side of rotating shaft, cause motor performance not good, overload capacity is low; (2) complex structure, rotor, iron core change to assembled piece type structure, are difficult to one-shot forming, and arrange magnetism-isolating loop inside rotor, and assembling is complicated, process costs and material cost is higher, mechanical strength is low, is difficult to use in Large-power High-Speed motor.
Summary of the invention
Technical problem solved by the invention is that the existing magnetic leakage factor existed to the rotor structure in formula non-brush permanent-magnet DC motor is comparatively large, and overload capacity is low, the problem of structure and assembling complexity.Rotor structure for tangential permanent magnetic DC brushless motor of the present invention and motor thereof, simple and compact for structure, magnetic leakage factor is little, and mechanical strength is high, is convenient to produce, low cost of manufacture, there is higher anti-demagnetization capability and high overload ability, and increase radial permanent magnet body, make rotor permanent magnet have higher working point, there is larger torque/current ratio, torque/volume ratio and electric efficiency characteristic, have a good application prospect.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of rotor structure for tangential permanent magnetic DC brushless motor, it is characterized in that: comprise rotor core, tangential permanent magnet body and rotating shaft, described rotor core circumferentially radial direction has been spacedly distributed even number tangential permanent magnet body groove, the relative tangential permanent magnet body of polarity is provided with in adjacent tangential permanent magnet body groove, described tangential permanent magnet body groove is connected with nearly air gap side or disconnects, keep rotor core Central Symmetry, the nearly rotating shaft side of described tangential permanent magnet body groove is connected with the magnet isolation tank being positioned at its both sides, the nearly air gap side of described magnet isolation tank and the center line of corresponding tangential permanent magnet body groove angularly α stretch out, and formed radially-arranged every magnetic bridge between adjacent magnet isolation tank.
The aforesaid rotor structure for tangential permanent magnetic DC brushless motor, is characterized in that: the scope of described angle [alpha] is π/5p≤α≤pi/2, and p is rotor pole logarithm.
The aforesaid rotor structure for tangential permanent magnetic DC brushless motor, is characterized in that: the shape of cross section of described magnet isolation tank is writing board shape or arcuate shape, and the minimum widith W of magnet isolation tank is greater than 3 times of minimal air gap width S.
The aforesaid rotor structure for tangential permanent magnetic DC brushless motor, is characterized in that: the described cross sectional shape every magnetic bridge is writing board shape or radially reduces shape gradually to air gap side, and every the scope of the minimum widith L of magnetic bridge be 0.3mm≤L≤3mm.
The aforesaid rotor structure for tangential permanent magnetic DC brushless motor, it is characterized in that: the nearly air gap side of described tangential permanent magnet body groove is connected with the air groove being positioned at its both sides, the nearly air gap side of described air groove and the center line of corresponding tangential permanent magnet body groove angularly β extend internally, and are γ with the angle of adjacent vacant air drain.
The aforesaid rotor structure for tangential permanent magnetic DC brushless motor, is characterized in that: the scope of described angle beta is π/5p≤β≤π/p, and the scope of described angle γ is pi/2 p≤γ≤4 π/5p, p is rotor pole logarithm.
The aforesaid rotor structure for tangential permanent magnetic DC brushless motor, is characterized in that: the cross sectional shape of described air groove is writing board shape or reduces shape gradually along bearing of trend, and the minimum widith W2 of air groove is greater than minimal air gap width S.
The aforesaid rotor structure for tangential permanent magnetic DC brushless motor, it is characterized in that: between two adjacent tangential permanent magnet bodies, be equipped with radial permanent magnet body, the polarity of each radial permanent magnet body nearly air gap side and the pendant polar identical of adjacent tangential permanent magnet body side, described radial permanent magnet body is arranged in the radial permanent magnet body groove of individual layer or double-layer structure in the radial direction.
The aforesaid rotor structure for tangential permanent magnetic DC brushless motor, is characterized in that: the minimum range of described radial permanent magnet body groove and adjacent tangential permanent magnet body groove is W1, and its scope is 0.3mm≤W1≤3mm.
The aforesaid rotor structure for tangential permanent magnetic DC brushless motor, is characterized in that: the thickness of described radial permanent magnet body on radially direction is h1, and the thickness of least significant end is h2, and h1 >=h2; The magnetic energy product of described tangential permanent magnet body and radial permanent magnet body is inconsistent.
A kind of tangential permanent magnetic DC brushless motor, comprises stator, it is characterized in that: also comprise the above-mentioned rotor structure for tangential permanent magnetic DC brushless motor.
The invention has the beneficial effects as follows: the rotor structure for tangential permanent magnetic DC brushless motor of the present invention and motor thereof, simple and compact for structure, magnetic leakage factor is little, mechanical strength is high, be convenient to produce, low cost of manufacture, there is higher anti-demagnetization capability and high overload ability, at the larger salient pole of maintenance tangential rotor structure than in situation, and increase radial permanent magnet body, make rotor permanent magnet have higher working point, there is larger torque/current ratio, torque/volume ratio and electric efficiency characteristic, have a good application prospect.
Accompanying drawing explanation
Fig. 1 is the first example structure schematic diagram of the rotor structure for tangential permanent magnetic DC brushless motor of the present invention.
Fig. 2 is the second example structure schematic diagram of the rotor structure for tangential permanent magnetic DC brushless motor of the present invention.
Fig. 3 is the 3rd example structure schematic diagram of the rotor structure for tangential permanent magnetic DC brushless motor of the present invention.
Fig. 4 is the radial permanent magnet body groove of third embodiment of the invention and the most narrow spacing schematic diagram of adjacent tangential permanent magnet body groove.
Fig. 5 is the 4th example structure schematic diagram of the rotor structure for tangential permanent magnetic DC brushless motor of the present invention.
Fig. 6 is the structural representation of the tangential permanent magnetic DC brushless motor adopting rotor mechanism of the present invention to be formed.
Embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
Rotor structure for tangential permanent magnetic DC brushless motor of the present invention, the first embodiment as shown in Figure 1, comprise rotor core 1, tangential permanent magnet body 2 and rotating shaft 3, described rotor core 1 circumferentially radial direction has been spacedly distributed even number tangential permanent magnet body groove 21, the relative tangential permanent magnet body 2 of polarity is provided with in adjacent tangential permanent magnet body groove 21, form rotor magnetic pole N or S, described tangential permanent magnet body groove 21 is connected with nearly air gap side or disconnects, interval connection and disrupted configuration form can be used to interlock carry out, keep rotor core 1 Central Symmetry, the nearly rotating shaft side of described tangential permanent magnet body groove 21 is connected with the magnet isolation tank 4 being positioned at its both sides, the nearly air gap side of described magnet isolation tank 4 and the center line 5 of corresponding tangential permanent magnet body groove 21 angularly α stretch out, and formed radially-arranged every magnetic bridge 6 between adjacent magnet isolation tank 4.
The scope of described angle [alpha] is π/5p≤α≤pi/2, and p is rotor pole logarithm.
The first embodiment as shown in Figure 1, the shape of cross section of described magnet isolation tank 4 is writing board shape or arcuate shape, and the minimum widith W of magnet isolation tank 4 is greater than 3 times of minimal air gap width S.
The described cross sectional shape every magnetic bridge 6 is writing board shape or radially reduces shape gradually to air gap side, and is 0.3mm≤L≤3mm every the scope of the minimum widith L of magnetic bridge 6, reaches better every magnetic effect.
As shown in Figure 2, the second embodiment of the present invention, the nearly air gap side of tangential permanent magnet body groove 21 is connected with the air groove 7 being positioned at its both sides, the nearly air gap side of described air groove 7 and the center line 5 of corresponding tangential permanent magnet body groove 21 angularly β extend internally, and be γ with the angle of adjacent vacant air drain, the scope of described angle beta is π/5p≤β≤π/p, and the scope of described angle γ is pi/2 p≤γ≤4 π/5p, p is rotor pole logarithm.Ensure that rotor has stronger anti-demagnetization capability, motor overload multiple can be improved, for reaching optimum structure effect, the cross sectional shape of described air groove 7 is writing board shape or reduces shape gradually along bearing of trend, and the minimum widith W2 of air groove 7 is greater than minimal air gap width S.
As shown in Figure 3, the third embodiment of the present invention, radial permanent magnet body 8 is equipped with between two adjacent tangential permanent magnet bodies 2, the nearly polarity of air gap side of each radial permanent magnet body 8 and the pendant polar identical of adjacent tangential permanent magnet body 2 side, institute's radial permanent magnet body 8 is arranged in the radial permanent magnet body groove 81 of individual layer or double-layer structure in the radial direction, motor magnetic linkage can be improved, under identical electric current, motor can export larger moment of torsion and improve electric efficiency, as shown in Figure 4, radial permanent magnet body groove 81 is W1 with the minimum range of adjacent tangential permanent magnet body groove 21, its scope is 0.3mm≤W1≤3mm, the thickness of radial permanent magnet body 8 on radially direction is h1, the thickness of least significant end is h2, and h1 >=h2.
As shown in Figure 5, the fourth embodiment of the present invention, radial permanent magnet body 8 is arranged in the radial direction in two-layer arc mounting groove, magnetic circuit passage is provided with between arc mounting groove, when ensureing the salient pole ratio of motor, can improve motor useful flux, under identical electric current, motor can export larger moment of torsion and improve electric efficiency.
For reducing the magnetic leakage factor between radial permanent magnet body 8 and tangential permanent magnet body 2, minor distance of W 1, the 0.3mm≤W1≤3mm between the inner side of radial permanent magnet body groove 81 and adjacent tangential permanent magnet body groove 21.
For ensureing and improve the working point of radial permanent magnet body 8, the thickness of radial permanent magnet body 8 on radially direction is h1, and the thickness of least significant end is h2, h1 >=h2;
For Cost optimization or further reduce drive current, improve electric efficiency, the magnetic energy product of radial permanent magnet body 8 and tangential permanent magnet body 2 can be inconsistent or be dissimilar permanent magnet; When radial direction is two layers of radial magnet structure, the radial permanent magnet body magnetic energy product of nearly air gap side is more than or equal to the radial permanent magnet body magnetic energy product of nearly rotating shaft side.
As shown in Figure 6, the present invention is adopted to describe the tangential permanent magnetic DC brushless motor of rotor mechanism, tangential permanent magnetic DC brushless motor comprises the radial air gap 11 between the rotor of stator 9 and rotor 10 and formation, stator 9 comprises stator core 91 and is arranged on many group stator winding 92 on stator core 91, rotor 10 is arranged in stator 9, and be separated with radial air gap 11, wherein, rotor 10 adopts rotor mechanism of the present invention to make.
In sum, rotor structure for tangential permanent magnetic DC brushless motor of the present invention and motor thereof, simple and compact for structure, magnetic leakage factor is little, mechanical strength is high, be convenient to produce, low cost of manufacture, there is higher anti-demagnetization capability and high overload ability, at the larger salient pole of maintenance tangential rotor structure than in situation, and increase radial permanent magnet body, make rotor permanent magnet have higher working point, there is larger torque/current ratio, torque/volume ratio and electric efficiency characteristic, have a good application prospect.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (11)
1. the rotor structure for tangential permanent magnetic DC brushless motor, it is characterized in that: comprise rotor core (1), tangential permanent magnet body (2) and rotating shaft (3), described rotor core (1) circumferentially radial direction has been spacedly distributed even number tangential permanent magnet body groove (21), the tangential permanent magnet body (2) that polarity is relative is provided with in adjacent tangential permanent magnet body groove (21), described tangential permanent magnet body groove (21) is connected with nearly air gap side or disconnects, keep rotor core (1) Central Symmetry, the nearly rotating shaft side of described tangential permanent magnet body groove (21) is connected with the magnet isolation tank (4) being positioned at its both sides, the nearly air gap side of described magnet isolation tank (4) and the center line (5) of corresponding tangential permanent magnet body groove (21) angularly α stretch out, and formed radially-arranged every magnetic bridge (6) between adjacent magnet isolation tank (4).
2. the rotor structure for tangential permanent magnetic DC brushless motor according to claim 1, is characterized in that: the scope of described angle [alpha] is π/5p≤α≤pi/2, and p is rotor pole logarithm.
3. the rotor structure for tangential permanent magnetic DC brushless motor according to claim 1 and motor thereof, it is characterized in that: the shape of cross section of described magnet isolation tank (4) is writing board shape or arcuate shape, and the minimum widith W of magnet isolation tank (4) is greater than 3 times of minimal air gap width S.
4. the rotor structure for tangential permanent magnetic DC brushless motor according to claim 1, it is characterized in that: the described cross sectional shape every magnetic bridge (6) is writing board shape or radially reduces shape gradually to air gap side, and every the scope of the minimum widith L of magnetic bridge (6) be 0.3mm≤L≤3mm.
5. the rotor structure for tangential permanent magnetic DC brushless motor according to claim 1, it is characterized in that: the nearly air gap side of described tangential permanent magnet body groove (21) is connected with the air groove (7) being positioned at its both sides, the nearly air gap side of described air groove (7) and the center line (5) of corresponding tangential permanent magnet body groove (21) angularly β extend internally, and are γ with the angle of adjacent vacant air drain.
6. the rotor structure for tangential permanent magnetic DC brushless motor according to claim 5, is characterized in that: the scope of described angle beta is π/5p≤β≤π/p, and the scope of described angle γ is pi/2 p≤γ≤4 π/5p, p is rotor pole logarithm.
7. the rotor structure for tangential permanent magnetic DC brushless motor according to claim 5, it is characterized in that: the cross sectional shape of described air groove (7) is writing board shape or reduces shape gradually along bearing of trend, and the minimum widith W2 of air groove (7) is greater than minimal air gap width S.
8. the rotor structure for tangential permanent magnetic DC brushless motor according to claim 1, it is characterized in that: between two adjacent tangential permanent magnet bodies (2), be equipped with radial permanent magnet body (8), the nearly polarity of air gap side of each radial permanent magnet body (8) and the pendant polar identical of adjacent tangential permanent magnet body (2) side, described radial permanent magnet body (8) is arranged in the radial permanent magnet body groove (81) of individual layer or double-layer structure in the radial direction.
9. the rotor structure for tangential permanent magnetic DC brushless motor according to claim 8, is characterized in that: described radial permanent magnet body groove (81) is W1 with the minimum range of adjacent tangential permanent magnet body groove (21), and its scope is 0.3mm≤W1≤3mm.
10. the rotor structure for tangential permanent magnetic DC brushless motor according to claim 1 or 8, is characterized in that: the thickness of described radial permanent magnet body (8) on radially direction is h1, and the thickness of least significant end is h2, and h1 >=h2; Described tangential permanent magnet body (2) is inconsistent with the magnetic energy product of radial permanent magnet body (8).
11. 1 kinds of tangential permanent magnetic DC brushless motors, comprise stator, it is characterized in that: also comprise the rotor structure for tangential permanent magnetic DC brushless motor as described in any one of claim 1-10.
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| CN201510763578.7A CN105305760A (en) | 2015-11-11 | 2015-11-11 | Rotor structure used for tangential permanent magnet direct current brushless motor, and tangential permanent magnet direct current brushless motor |
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| CN201510763578.7A CN105305760A (en) | 2015-11-11 | 2015-11-11 | Rotor structure used for tangential permanent magnet direct current brushless motor, and tangential permanent magnet direct current brushless motor |
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| CN105305760A true CN105305760A (en) | 2016-02-03 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276354A (en) * | 2017-08-21 | 2017-10-20 | 伊泽瑞尔(大连)科技有限公司 | A kind of rotor of tangential permanent magnetic synchronous motor |
| CN107482811A (en) * | 2017-09-30 | 2017-12-15 | 广东威灵电机制造有限公司 | For built-in motor rotor core and there is its built-in motor |
| CN108551215A (en) * | 2018-07-03 | 2018-09-18 | 宝龙电子集团有限公司 | Motor |
| CN109378915A (en) * | 2018-12-04 | 2019-02-22 | 哈尔滨理工大学 | A kind of rotor structure for permanent magnet motor |
| CN109905006A (en) * | 2019-04-23 | 2019-06-18 | 山东理工大学 | Radially alternating permanent magnet drive motor for electric vehicle |
| DE102017130608A1 (en) * | 2017-12-19 | 2019-06-19 | Hiwin Mikrosystem Corp. | Rotor of a rotary motor |
| CN110611386A (en) * | 2019-10-10 | 2019-12-24 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor, motor and compressor |
| CN112615517A (en) * | 2020-11-30 | 2021-04-06 | 珠海格力电器股份有限公司 | Magnetic gear assembly and composite motor with same |
| CN112671137A (en) * | 2020-12-28 | 2021-04-16 | 江苏沃尔森电子科技有限公司 | Brushless motor |
| US11387696B2 (en) | 2017-08-09 | 2022-07-12 | Gree Green Refrigeration Technology Center Co., Ltd. Of Zhuhai | Tangential motor, tangential motor rotor and rotor core of tangential motor rotor |
| CN116581911A (en) * | 2023-05-30 | 2023-08-11 | 淮阴工学院 | Rotor structure of built-in permanent magnet synchronous motor |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11387696B2 (en) | 2017-08-09 | 2022-07-12 | Gree Green Refrigeration Technology Center Co., Ltd. Of Zhuhai | Tangential motor, tangential motor rotor and rotor core of tangential motor rotor |
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| CN109378915A (en) * | 2018-12-04 | 2019-02-22 | 哈尔滨理工大学 | A kind of rotor structure for permanent magnet motor |
| CN109905006A (en) * | 2019-04-23 | 2019-06-18 | 山东理工大学 | Radially alternating permanent magnet drive motor for electric vehicle |
| CN110611386A (en) * | 2019-10-10 | 2019-12-24 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor, motor and compressor |
| CN112615517A (en) * | 2020-11-30 | 2021-04-06 | 珠海格力电器股份有限公司 | Magnetic gear assembly and composite motor with same |
| CN112671137A (en) * | 2020-12-28 | 2021-04-16 | 江苏沃尔森电子科技有限公司 | Brushless motor |
| CN116581911A (en) * | 2023-05-30 | 2023-08-11 | 淮阴工学院 | Rotor structure of built-in permanent magnet synchronous motor |
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Application publication date: 20160203 |