CN103915921B - Magneto - Google Patents
Magneto Download PDFInfo
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- CN103915921B CN103915921B CN201210594895.7A CN201210594895A CN103915921B CN 103915921 B CN103915921 B CN 103915921B CN 201210594895 A CN201210594895 A CN 201210594895A CN 103915921 B CN103915921 B CN 103915921B
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Abstract
The invention provides a kind of magneto, comprising: the first rotor, comprise rotor core; Stator, is coaxially arranged with the first rotor, has gap between stator and the first rotor, and stator comprises the stator core being arranged at intervals with multiple groove and multiple tooth in a circumferential direction and the stator winding being placed in groove; Multiple magnetic pole grooves of the inside in axial direction setting spaced apart of rotor core.The comparatively large and problem that electric efficiency is low of the motor drive current that present invention efficiently solves magneto in prior art.
Description
Technical field
The present invention is specifically related to a kind of magneto.
Background technology
The feature performance benefits such as it is little that disc-type permanent magnet motor has axial dimension compared with conventional motors, and power density is high, torque/mass ratio is large, low cruise is steady, obtain research and apply more and more widely.Especially disc type electric machine has larger output torque, is particularly suitable for high-torque direct drive.
Traditional disc-type permanent magnet motor with birotor and intermediate stator structure, as shown in Figure 1, the permanent magnet 11 ' of magneto mostly adopts surface-mount type structure, namely permanent magnet 11 ' is all arranged on rotor 10 ' towards on the surface of stator 20 ', but the utilization that the magneto of prior art does not increase reluctance torque causes motor drive current comparatively large and electric efficiency is low.
Summary of the invention
The present invention aims to provide a kind of magneto, the comparatively large and problem that electric efficiency is low with the motor drive current solving magneto in prior art.
To achieve these goals, the invention provides a kind of magneto, comprising: the first rotor, comprise rotor core; Stator, is coaxially arranged with the first rotor, has gap between stator and the first rotor, and stator comprises the stator core being arranged at intervals with multiple groove and multiple tooth in a circumferential direction and the stator winding being placed in groove; Multiple magnetic pole grooves of the inside in axial direction setting spaced apart of rotor core.
Further, rotor core is provided with organizes magnetic pole unit more, often organize magnetic pole unit and comprise multiple permanent magnet, multiple permanent magnet is separately positioned in different magnetic pole grooves, and the axis superposition magnetic line of force of the permanent magnet often in group magnetic pole unit points to consistent common formation magnetic pole N or S.
Further, the first rotor quantity is two, and the quantity of stator is one, and two the first rotors are separately positioned on the both sides of the axial direction of stator, has the first angle between the magnetic pole line of demarcation of two the first rotors.
Further, tooth comprises: the first tooth, is along the circumferential direction evenly distributed on the first side of the axial direction of stator core; Second tooth, be along the circumferential direction evenly distributed on the second side of the axial direction of stator core, the second tooth is corresponding one by one with the first tooth, and the center line of the second tooth has the second angle with between the center line of the first corresponding tooth.
Further, rotor core is that dust core is made.
Further, magnetic pole groove comprises the first groove section and the second groove section that are interconnected, and the first groove section is extended along the radial direction of rotor, and the two ends of the first groove section are connected to the second groove section, and the second groove section is extended along the axial direction of rotor core.
Further, magneto also comprises the second rotor, the first rotor and the second rotor are separately positioned on the both sides of the axial direction of stator, and the second rotor is provided with permanent magnet towards the surface of stator, has the 3rd angle between the first rotor and bitrochanteric magnetic pole line of demarcation.
Further, the 3rd angle is between 20 ° to 45 °.
Further, the inside of the first rotor is provided with multiple magnetic flux stop part, multiple magnetic flux stop part is separately positioned in magnetic pole groove, magnetic flux stop part is every magnetizing mediums, rotor core is magnetic conductive media, magneto also comprises the second rotor, the first rotor and the second rotor are separately positioned on the both sides of the axial direction of stator, second rotor is provided with permanent magnet towards the surface of stator, magnetic flux stop part is corresponding with bitrochanteric magnetic pole, magnetic flux stop part between magnetic line of demarcation and corresponding bitrochanteric magnetic pole line of demarcation, there is the 4th angle.
Further, the 4th angle is between 40 ° to 50 °.
Provide application technical scheme of the present invention, magneto comprises: the first rotor, comprises rotor core; Stator, is coaxially arranged with the first rotor, has gap between stator and the first rotor, and stator comprises the stator core being arranged at intervals with multiple groove and multiple tooth in a circumferential direction and the stator winding being placed in groove; Multiple magnetic pole grooves of the inside in axial direction setting spaced apart of rotor core.Cause the magnetic circuit of rotor asymmetric because many magnetic poles groove is set up in parallel along the axial direction of rotor, form d-axis unequal with quadrature axis inductance, generation reluctance torque, under same Driving Torque, the increase of reluctance torque is conducive to reducing motor drive current, reduces the loss of electric machine, improves electric efficiency.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the rotor of magneto and the structural representation of stator in prior art;
Fig. 2 shows the structural representation of the first embodiment of magneto of the present invention;
Fig. 3 shows the internal structure schematic diagram of the magneto of Fig. 2;
Fig. 4 shows the structural representation of the rotor of the magneto of Fig. 2;
Fig. 5 shows the part-structure schematic diagram of the rotor of Fig. 4;
Fig. 6 shows the marginal distribution schematic diagram of magnetic pole of the magneto of Fig. 2;
Fig. 7 shows the marginal enlarged diagram of magnetic pole of Fig. 6;
Fig. 8 shows the partial schematic diagram of the stator of the magneto of Fig. 2;
Fig. 9 shows the structural representation of the second embodiment of magneto of the present invention;
Figure 10 shows the marginal distribution schematic diagram of magnetic pole of the magneto of Fig. 9;
Figure 11 shows the marginal enlarged diagram of magnetic pole of Figure 10;
The motor drive current of magneto and prior art that Figure 12 shows the first embodiment contrasts schematic diagram;
What the angle between the magnetic pole line of demarcation that Figure 13 shows the magneto of the first embodiment was pulsed on motor cogging torque affects schematic diagram;
What Figure 14 showed that the first tooth of the stator of the magneto of the first embodiment and the tooth centerlines of the second tooth pulse on motor cogging torque affects schematic diagram;
Angle between the magnetic pole line of demarcation that Figure 15 shows two rotors of the magneto of the second embodiment affects schematic diagram to motor synthesis electromagnetic torque;
Figure 16 shows the internal structure schematic diagram of the 3rd embodiment of magneto of the present invention;
Figure 17 shows the structural representation of the first rotor of the magneto of Figure 16;
Figure 18 shows the enlarged diagram distributed every magnetic line of demarcation and magnetic pole line of demarcation of the magneto of Figure 16;
Figure 19 shows the 4th angle in the magneto of Figure 16 affects schematic diagram to motor synthesis electromagnetic torque.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The invention provides a kind of first embodiment of magneto, specifically as shown in Figures 2 and 3, magneto comprises the first rotor 10 and stator 20, the first rotor 10 comprises rotor core 11, stator 20 and described the first rotor 10 are coaxially arranged, between described stator 20 and described the first rotor 10, there is gap, described stator 20 is included in the stator core 21 being circumferentially arranged at intervals with multiple groove 22 and multiple tooth 23 and the stator winding 24 being placed in described groove, multiple magnetic pole grooves 13 of the inside in axial direction setting spaced apart of described rotor core 11.
Cause the magnetic circuit of rotor asymmetric because many magnetic poles groove is set up in parallel along the axial direction of rotor, form d-axis unequal with quadrature axis inductance, generation reluctance torque, under same Driving Torque, the increase of reluctance torque is conducive to reducing motor drive current, reduces the loss of electric machine, improves electric efficiency.As shown in figure 12, under identical Driving Torque, the motor drive current of A needed for prior art, B is the motor drive current of the present embodiment, and the motor drive current of the present embodiment is obviously little than prior art.
As shown in Figure 4, described rotor core 11 is provided with organizes magnetic pole unit more, often organize described magnetic pole unit and comprise multiple described permanent magnet 12, multiple described permanent magnet 12 is separately positioned in different described magnetic pole grooves 13, the axis superposition magnetic line of force often organizing the described permanent magnet 12 in magnetic pole unit points to and unanimously jointly forms magnetic pole N or S, and in the present embodiment, magnetic pole groove 13 is two-layer.Further, because the permanent magnet 12 of rotor is arranged on inside, the mechanical strength of rotor is improved, is applicable to operating at high speeds.
The present embodiment further preferably, the magneto of the present embodiment has the structure of single stator double-sided rotors, specifically see Fig. 6 and Fig. 7, the first rotor 10 quantity is two, the quantity of stator 20 is one, two the first rotors 10 are separately positioned on the both sides of the axial direction of stator 20, there is between the magnetic pole line of demarcation 14 of two the first rotors 10 first angle α, by by be provided with between the magnetic pole line of demarcation of two rotors the first angle can effectively reduce stator cogging torque pulsation, specifically as Figure 13 illustrates magnetic pole line of demarcation angle to motor cogging torque pulsations affect schematic diagram, wherein α ' the motor cogging torque pulsation lines that are prior art, α
0for the motor cogging torque pulsation lines that the α number of degrees are not 0, as can be seen from Figure 13, motor cogging torque fluctuation amplitude reduces along with the existence of the first angle between magnetic pole line of demarcation, in the first angle adjustable extent, there is optimum angle α
1cogging torque is pulsed and reaches minimum value, optimum angle α
1change with the change of motor slot number cooperation value.It should be noted that, the structure of two the first rotors 10 in the present embodiment is identical, is all that rotor core inside is provided with multiple permanent magnet 12.It should be noted that, all angles related in the application are electric angle, and electric angle=mechanical angle X motor number of pole-pairs, electric angle equals mechanical angle and is multiplied by motor logarithm.
As in Fig. 2 and Fig. 8, the stator of magneto has bilateral groove structure, the groove 22 being positioned at stator shaft orientation both sides extends towards axial both sides respectively, and define tooth 23 between adjacent two grooves 22, tooth 23 comprises the first tooth 231 and the second tooth 232, first tooth 231 is along the circumferential direction evenly distributed on the first side of the axial direction of stator core 21, second tooth 232, along the circumferential direction be evenly distributed on the second side of the axial direction of stator core 21, second tooth 232 is corresponding one by one with the first tooth 231, the center line of the second tooth 232 has the second angle β with between the center line of the first corresponding tooth 231.Lay respectively at both sides and form the second angle β between the center line of corresponding two teeth, and the angle number of degrees of the center line of corresponding two grooves are similarly β.The second angle between the center line that Figure 14 illustrates the corresponding tooth of stator to motor cogging torque pulsations affect schematic diagram, the motor cogging torque pulsation lines that β ' is prior art, β
0for the motor cogging torque pulsation lines that β angle is not 0, as can be seen from Figure 14, motor cogging torque fluctuation amplitude exists along with centerlines and reduces, and in the second angle adjustable extent, there is optimum angle β
1cogging torque is pulsed and reaches minimum value, optimum angle β
1change with the change of motor slot number cooperation value.
As shown in Figure 5, magnetic pole groove 13 comprises the first groove section 131 and the second groove section 132 be interconnected, first groove section 131 is extended along the radial direction of rotor, and it is extended along the axial direction of rotor core that the two ends of the first groove section 131 are connected to the second groove section 132, second groove section 132.Can find out in Figure 5 quadrature axis and d-axis unequal, the second groove section 132 extends to rotor core near the end face of stator.
Rotor core 11 is made for dust core.Permanent magnet 12 is injection moulding permanent magnet 12.Inside and outside rotor, all there is the collar that non-magnet material is made both sides.
Present invention also offers the second embodiment of magneto, specifically see Fig. 9 to Figure 11, the magneto of the present embodiment comprises the first rotor 10 and stator 20, and the first rotor 10 is substantially identical with the first embodiment of magneto with the structure of stator 20, difference is only, magneto also comprises the second rotor 30, the quantity of stator 20 is one, the first rotor 10 and the second rotor 30 are separately positioned on the both sides of the axial direction of stator 20, second rotor 30 is provided with permanent magnet 31 towards the surface of stator 20, the first rotor rotates with identical direction and speed with the second rotor, when motor is installed, between the first rotor 10 and the magnetic pole line of demarcation of the second rotor 30, there is the 3rd angle γ, and the second rotor magnetic pole line of demarcation is positioned at the front side of rotor direction of rotation relative to the magnetic pole line of demarcation of the first rotor.Fig. 9 and Figure 10 respectively illustrates rotor structure and the magnetic pole distribution situation of the present embodiment, and wherein permanent magnet is pasted on bitrochanteric surface, and is alternately distributed in bitrochanteric side by N, S magnetic pole.
Angle between the magnetic pole line of demarcation that Figure 15 describes two rotors is on the impact of motor synthesis electromagnetic torque, and as can be seen from the figure, the 3rd angle γ is in time spending to 45° angle for 20 °, and under same current, motor synthesis electromagnetic torque effective value is maximum.
Present invention also offers the 3rd embodiment of magneto, specifically see Figure 16 to Figure 18, the magneto of the present embodiment comprises the first rotor 10, second rotor 30 and stator 20, and the first rotor 10, second rotor 30 is substantially identical with the second embodiment of magneto with the structure of stator 20, difference is only, the inside of the first rotor 10 is provided with multiple magnetic flux stop part 15, multiple magnetic flux stop part 15 is separately positioned in magnetic pole groove 13, magnetic flux stop part 15 is every magnetizing mediums, rotor core is magnetic conductive media, magnetic flux stop part 15 is corresponding with the magnetic pole of the second rotor 30, magnetic flux stop part 15 between magnetic line of demarcation 14 and the magnetic pole line of demarcation 34 of the second corresponding rotor 30, there is the 4th angle theta and the second rotor magnetic pole line of demarcation is positioned at the front side of rotor direction of rotation relative to the magnetic pole line of demarcation of the first rotor.The not magnetic conductive media such as air or resin is filled in magnetic flux stop part.By the synthesis electromagnetic torque that can effectively improve under motor unitary current that arranges of the 4th angle.
Figure 19 describes the impact of the 4th angle on motor synthesis electromagnetic torque, and as can be seen from Figure 19, when the 4th angle theta is between 40 ° to 50 °, under same current, motor synthesis electromagnetic torque effective value is maximum.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a magneto, comprising:
The first rotor (10), comprises rotor core (11);
Stator (20), coaxially arrange with described the first rotor (10), have gap between described stator (20) and described the first rotor (10), described stator (20) is included in the stator core (21) being circumferentially arranged at intervals with multiple groove (22) and multiple tooth (23) and the stator winding (24) being placed in described groove;
Multiple magnetic pole grooves (13) of the inside in axial direction setting spaced apart of described rotor core (11);
Described the first rotor (10) quantity is two, and the quantity of described stator (20) is one, and two described the first rotors (10) are separately positioned on the both sides of the axial direction of described stator (20);
It is characterized in that,
Described tooth (23) comprising:
First tooth (231), is along the circumferential direction evenly distributed on the first side of the axial direction of described stator core (21);
Second tooth (232), along the circumferential direction be evenly distributed on the second side of the axial direction of described stator core (21), described second tooth (232) is corresponding one by one with described first tooth (231), and the center line of described second tooth (232) has the second angle (β) with between the center line of corresponding described first tooth (231).
2. magneto according to claim 1, it is characterized in that, described rotor core (11) is provided with organizes magnetic pole unit more, often organize described magnetic pole unit and comprise multiple permanent magnet (12), multiple described permanent magnet (12) is separately positioned in different described magnetic pole grooves (13), and the axis superposition magnetic line of force often organizing the described permanent magnet (12) in magnetic pole unit points to and unanimously jointly forms magnetic pole N or S.
3. magneto according to claim 1, is characterized in that, has the first angle (α) between the magnetic pole line of demarcation (14) of two described the first rotors (10).
4. magneto according to claim 1, is characterized in that, described rotor core (11) is made for dust core.
5. magneto according to claim 1, it is characterized in that, described magnetic pole groove (13) comprises the first groove section (131) and the second groove section (132) that are interconnected, described first groove section (131) is extended along the radial direction of described rotor, the two ends of described first groove section (131) are connected to described second groove section (132), and described second groove section (132) is extended along the axial direction of described rotor core.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510650559.3A CN105305748B (en) | 2012-12-31 | 2012-12-31 | Magneto |
| CN201210594895.7A CN103915921B (en) | 2012-12-31 | 2012-12-31 | Magneto |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210594895.7A CN103915921B (en) | 2012-12-31 | 2012-12-31 | Magneto |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510650559.3A Division CN105305748B (en) | 2012-12-31 | 2012-12-31 | Magneto |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103915921A CN103915921A (en) | 2014-07-09 |
| CN103915921B true CN103915921B (en) | 2015-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210594895.7A Active CN103915921B (en) | 2012-12-31 | 2012-12-31 | Magneto |
| CN201510650559.3A Active CN105305748B (en) | 2012-12-31 | 2012-12-31 | Magneto |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510650559.3A Active CN105305748B (en) | 2012-12-31 | 2012-12-31 | Magneto |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158361B (en) * | 2014-09-03 | 2016-07-06 | 肖振霞 | A kind of steering wheel shape stator and double-rotor magneto |
| CN104638858A (en) * | 2015-02-02 | 2015-05-20 | 李永建 | Dual-magnetic-pole generator |
| FR3063400B1 (en) | 2017-02-24 | 2021-11-19 | Leroy Somer Moteurs | ELECTRICAL ROTATING MACHINE WITH AXIAL FLOW |
| EP4300775A4 (en) * | 2021-03-30 | 2024-05-15 | Huawei Digital Power Technologies Co., Ltd. | Electric motor rotor, electric motor and electric vehicle |
| CN114825725B (en) * | 2022-05-17 | 2024-03-19 | 山东大学 | Low-cost axial permanent magnet motor and control system thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897419A (en) * | 2005-06-16 | 2007-01-17 | 富士通将军股份有限公司 | Axial air-gap electronic motor |
| CN101663806A (en) * | 2007-04-17 | 2010-03-03 | 本田技研工业株式会社 | Axial gap motor |
| CN103036376A (en) * | 2011-10-10 | 2013-04-10 | 三星电子株式会社 | Motor and rotor of a motor |
| CN202997723U (en) * | 2012-12-31 | 2013-06-12 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnetic motor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006074909A (en) * | 2004-09-02 | 2006-03-16 | Sumitomo Electric Ind Ltd | Multishaft motor |
| CN102684428B (en) * | 2012-05-14 | 2014-05-07 | 华中科技大学 | Modular multi-disc type permanent magnet brushless motor |
-
2012
- 2012-12-31 CN CN201210594895.7A patent/CN103915921B/en active Active
- 2012-12-31 CN CN201510650559.3A patent/CN105305748B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897419A (en) * | 2005-06-16 | 2007-01-17 | 富士通将军股份有限公司 | Axial air-gap electronic motor |
| CN101663806A (en) * | 2007-04-17 | 2010-03-03 | 本田技研工业株式会社 | Axial gap motor |
| CN103036376A (en) * | 2011-10-10 | 2013-04-10 | 三星电子株式会社 | Motor and rotor of a motor |
| CN202997723U (en) * | 2012-12-31 | 2013-06-12 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnetic motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105305748B (en) | 2017-11-07 |
| CN105305748A (en) | 2016-02-03 |
| CN103915921A (en) | 2014-07-09 |
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