CN2872721Y - Electrically-aided steering permanent-magnetic DC brush motor of automobile - Google Patents
Electrically-aided steering permanent-magnetic DC brush motor of automobile Download PDFInfo
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- CN2872721Y CN2872721Y CN 200620068555 CN200620068555U CN2872721Y CN 2872721 Y CN2872721 Y CN 2872721Y CN 200620068555 CN200620068555 CN 200620068555 CN 200620068555 U CN200620068555 U CN 200620068555U CN 2872721 Y CN2872721 Y CN 2872721Y
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Abstract
The utility model comprises a housing, a permanent magnet, a rotor with winding, an electric brush, and a commutator including commutator segment. The tile-like permanent magnet is fixed on the inner cavity of the housing and provided with an asymmetric special-shaped section including a non-concentric outer and inner arc. The length/diameter ratio of the rotor is 1.2-1.4, and the rotor has a chute structure having an included angle with the axis of the rotor. The rotor iron core is made of multiple segments of silicon steel plates with different magnetic guide directions, and the segments of silicon steel plates are respectively and sequentially twisted by an angle along an axis rotation direction. The rotor winding is provided with equalization lines between commutator segments under brushes of the same polarity. The utility model has small rotational inertia, small fluctuation of electromagnetic moment, large torque, good characteristic linearity, fast response, and small vibration and noise.
Description
Technical field
The utility model relates to technical field of automobile parts, relates in particular to a kind of motor that is used for automobile electric power-assisted steering.
Background technology
In recent years, some automobiles have used electric boosting steering system (EPS), and economy, dynamic property and the mobility of automobile are all increased.Electric boosting steering system (EPS) generally is made of torque (turning to) transducer, control unit (ECU), motor, decelerator, steering column and mechanical driving device.Automobile is when turning to, torque (turning to) transducer meeting " sensation " is to the moment and the direction of steering wheel, these signals can be issued control unit by data/address bus, the data-signals such as direction that control unit then changes according to driving torque, plan, send action command to electric machine controller, motor will be exported the rotating torque of corresponding size according to concrete needs, thereby has produced power-assisted steering.Because the superior operating characteristic of electric booster steering device when the control car load turns to, has improved the comfortableness and the sense of security of car load.Do not work when not turning to owing to it again, compare with the conventional hydraulic servo steering system, owing to there is not the hydraulic booster pump, reduced the power consumption of generator, the contrast experiment shows under the various driving conditions, all can save energy about 80%, has improved the runnability of automobile.EPS is being promoted in recent years rapidly, also is the developing direction of servo steering system from now on.Yet, as the direct current machine of one of EPS critical component, exist problems such as moment of inertia is big, electromagnetic torque fluctuation, hinder the motor stabilizing operation, influenced the overall performance of EPS during use.
Summary of the invention
The technical problems to be solved in the utility model is: the deficiency at above-mentioned EPS direct current machine exists, a kind of automobile electric power-assisted steering permanent-magnet DC brush motor is provided, and it has less moment of inertia, and effectively reduces the electromagnetic torque fluctuation.
The technical solution adopted in the utility model is: a kind of automobile electric power-assisted steering permanent-magnet DC brush motor, comprise casing, permanent magnet, rotor, brush and commutator, described permanent magnet is fixed on the inner chamber of casing, described rotor comprises iron core and rotor winding, commutator comprises commutator segment, it is characterized in that: described permanent magnet is a watt shape odd-shaped cross section, the outer arc of its watt shape odd-shaped cross section and inner arc are not the same center of circle, the radius of described inner arc is greater than the radius of outer arc, and not on the axis of symmetry of outer arc, described cross section global shape is asymmetric.
The draw ratio of described rotor is 1.2～1.4.
Described rotor is made as flume structure, i.e. axis deviation one angle of teeth groove and rotor.
The iron core of described rotor, its each section lamination (silicon steel sheet) is a mark with the mark groove, increases progressively angle of rotation respectively or in turn along the axle direction of rotation.
Described rotor winding is provided with equalizer between the commutator segment under the same polarity brush.
It is the major issue that influences EPS electric power steering performance that the big and electromagnetic torque of moment of inertia fluctuates.The utility model adopts the rotor structure of big L/D ratio, then can effectively reduce the motor moment of inertia, and motor also can have bigger power simultaneously.In many reasons that causes motor electromagnetic moment fluctuation, the teeth groove torque fluctuations is a major reason.Because the existence of rotor teeth groove makes its surperficial air-gap permeance become inhomogeneous, under the situation of no armature supply, will produce teeth groove fluctuation moment by rotor core and stator field interaction, and this fluctuation moment is alternation.The utility model adopts skewed rotor, on the axial magnetic field of permanent magnet and rotor teeth groove, reduces relative magnetic resistance fluctuation, thereby has reduced the teeth groove torque fluctuations effectively, and help commutation.Owing to there is magnetic anisotropy in the folded cold-reduced silicon sheet that becomes rotor mutually, for overcoming the electromagnetic torque fluctuation that causes thus, can make each section of iron core silicon steel sheet of rotor rotate an angle in turn, syntheticly make rotor be the magnetic isotropism.Watt shape permanent magnet of axial symmetry center of circle circular arc in general produces approximate trapezoid ripple magnetic field, and its magnetic potential odd harmonic component will make rotor produce corresponding odd harmonic torque, is the important component part of motor electromagnetic moment fluctuation.The utility model adopts the permanent magnet of odd-shaped cross section, makes Distribution of Magnetic Field more approach sine wave, has reduced the magnetic field odd harmonic effectively, thereby it is saturated to have suppressed the pole tip that harmonic torque and the distortion of field cause effectively.In addition, the utility model is provided with equalizer between the rotor winding, and the voltage of balanced ectonexine winding equates each branch current of rotor winding, thereby reduces the rotor current unbalanced moments.Therefore, the utility model automobile electric power-assisted steering motor possesses favorable mechanical characteristic and regulating characteristics, has characteristics such as moment of inertia is little, the electromagnetic torque fluctuation is little, moment of torsion big, the characteristic linearity is good, response is fast.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model odd-shaped cross section permanent magnet scheme of installation;
Fig. 3 is the utility model odd-shaped cross section permanent magnet geometry schematic diagram;
Fig. 4 is the utility model rotor chute structural representation;
Fig. 5 is a radially isotropism schematic diagram of the overall magnetic of the utility model rotor core, and arrow is the magnetic conductance direction among the figure;
Fig. 6～Fig. 8 is respectively A-A, B-B, the C-C of Fig. 4 to cross-sectional schematic, to represent L shown in Figure 4
A, L
B, L
CThe silicon steel sheet magnetic conductance direction of each section rotor core, arrow is the magnetic conductance direction among the figure;
Fig. 9 is the utility model rotor winding principle schematic;
In the above accompanying drawing: the 100-permanent magnet; 100R-permanent magnet tile shape odd-shaped cross section outer arc; 100r-permanent magnet tile shape odd-shaped cross section inner arc; The 200-rotor; The 200a-iron core; The 200a1-silicon steel sheet; The 200b-teeth groove; 200c-rotor winding; The 200d-armature spindle; The 300-casing; The 400-brush; The 500-commutator; The 500a-commutator segment; The 600-equalizer; R-permanent magnet tile shape odd-shaped cross section outer arc radius; R-permanent magnet tile shape odd-shaped cross section inner arc radius.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is further described.
As shown in Figure 1 and Figure 2, the automobile electric power-assisted steering permanent-magnet DC brush motor of present embodiment, permanent magnet 100 is fixed on the inner chamber of casing 300.As Fig. 2, shown in Figure 3, the cross section of common permanent magnet is a symmetric shape, and the utility model permanent magnet 100 is the permanent magnet of odd-shaped cross section, and permanent magnet tile shape odd-shaped cross section outer arc 100R and its inner arc 100r are not the same center of circle, the center of circle O of inner arc 100r
r, not on the geometirc symmetry axis line of its outer arc 100R, and the center of circle O of inner arc 100r
rCenter of circle O with respect to the outer arc 100R on the geometirc symmetry axis line
R, level and vertical direction have eccentric throw L respectively
1With L
2Simultaneously, the radius r of inner arc 100r is greater than the radius R of outer arc 100R.Permanent magnet cross section global shape is asymmetric shape.
The iron core 200a of rotor 200 forms by cold-reduced silicon sheet 200a1 is folded mutually, is wound with rotor winding 200c on it.As shown in Figure 4, rotor 200 adopts flume structure, and promptly the axis deviation one angle α of teeth groove 200b and armature spindle 200d then can effectively reduce the teeth groove force oscillation.Present embodiment rotor 200 is 22 teeth groove, and in conjunction with teeth groove quantity, 3～10 degree are generally got at the α angle.In addition, because the cold-reduced silicon sheet punching has the difference of different magnetic conductance sizes on all directions, exist the directivity of magnetic conductance, it is the anisotropy of magnetic, therefore, totally radially be the magnetic isotropism, overcoming the problem that causes the electromagnetic torque fluctuation because of the folded mutually rotor 200 that forms of the silicon steel sheet of magnetic anisotropy for making rotor 200 and iron core 200a thereof, as Fig. 4, Fig. 5, Fig. 6, Fig. 7 and illustrated in Figure 8,200a is divided into L with iron core
A, L
B, L
CThree sections, each section silicon steel sheet 200a1 indicates the mark groove of representing the magnetic conductance direction as arrow, with one section mark groove wherein is benchmark, each section silicon steel sheet 200a1 with other, an edge axle direction of rotation increases progressively respectively or successively piecemeal reverses an angle beta, and it is folded to remake immobile phase, makes different each section of magnetic conductance direction iron core 200a silicon steel sheets, synthesize whole isotropism, solve the problem of monolithic cold-reduced silicon sheet magnetic anisotropy.Iron core 200a can be magnetic isotropism as shown in Figure 5.Generally look teeth groove number situation, each section silicon steel sheet 200a1 windup-degree β equates that the integer multiple at β angle equals 360, and described integer multiple number also just is the number of the segmentation of iron core 200a.It is 120 degree that present embodiment adopts the β angle, and the silicon steel sheet 200a1 of iron core 200a is divided into three sections.The silicon steel sheet 200a1 of iron core 200a can be divided into more hop count, and then the β angle is corresponding gets littler angle, makes iron core 200a that more uniform isotropic magnetic conductance be arranged.Simultaneously, rotor 200 can adopt multi-groove structure and shallow and wide grooved, can either be favourable to the influence of reduced harmonic, can also reduce motor oscillating and noise.
In addition, the general structure of rotor 200 designs for big L/D ratio, and general rotor draw ratio is 0.8, and it is 1.2～1.4 that the utility model adopts draw ratio, can effectively reduce the motor moment of inertia, and motor also can have bigger power simultaneously.
In addition, as shown in Figure 9, there is the iron core 200a of 22 teeth groove to be wound with rotor winding 200c, being provided with equalizer 600 between the commutator segment 500a of the commutator 500 under the same polarity brush 400 links to each other, the long short inner coil of average turn by equalizer 600, is communicated with the long long outer coil of another side average turn on one side, balanced their voltage is beneficial to reduce the electromagnetic torque fluctuation.
The foregoing description is as an illustration example only, is not the qualification that the utility model is done.In addition to the implementation, the utility model can also have other execution modes.For example, use oblique magnetic technology, be fixed in the permanent magnet 100 on the casing 300, corresponding to the rotor 200 of flume structure, also can with axis deviation one angle of armature spindle 200d, or the like, do not give unnecessary details one by one at this.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all belong to the protection range of the utility model requirement.
Claims (7)
1, a kind of automobile electric power-assisted steering permanent-magnet DC brush motor, comprise casing (300), permanent magnet (100), rotor (200), brush (400) and commutator (500), described permanent magnet (100) is fixed on the inner chamber of casing (300), described rotor (100) comprises rotor winding (200c), commutator (500) comprises commutator segment (500a), it is characterized in that: described permanent magnet (100) is a watt shape odd-shaped cross section, its watt shape odd-shaped cross section inner arc (100r) and outer arc (100
R) be not the same center of circle, the radius of described inner arc (r) is greater than the radius (R) of outer arc, and not at outer arc (100
R) the axis of symmetry on, described cross section global shape is asymmetric.
2, a kind of automobile electric power-assisted steering permanent-magnet DC brush motor according to claim 1 is characterized in that: the center of circle (Or) of described permanent magnet tile shape odd-shaped cross section inner arc (100r), and not at its outer arc (100
R) the geometirc symmetry axis line on, or the center of circle (Or) of inner arc (100r) is with respect to the outer arc on the geometirc symmetry axis line (100
R) the center of circle (O
R), level and vertical direction have eccentric throw (L respectively
1) and (L
2).
3, a kind of automobile electric power-assisted steering permanent-magnet DC brush motor according to claim 1, it is characterized in that: the draw ratio of described rotor (200) is 1.2～1.4.
4, a kind of automobile electric power-assisted steering permanent-magnet DC brush motor according to claim 1, it is characterized in that: described rotor (200) is made as flume structure, i.e. axis deviation one angle (α) of teeth groove (200b) and rotor (200).
5, a kind of automobile electric power-assisted steering permanent-magnet DC brush motor according to claim 4 is characterized in that: described teeth groove (200b) is 3～10 degree with axis deviation one angle (α) of rotor (200).
6, a kind of automobile electric power-assisted steering permanent-magnet DC brush motor according to claim 1, it is characterized in that: the iron core (200a) of described rotor (200), its each section silicon steel sheet (200a1) indicates the mark groove of expression magnetic conductance direction, with one section mark groove wherein is benchmark, each section silicon steel sheet (200a1) with other, an edge axle direction of rotation increases progressively respectively or successively piecemeal reverses an angle (β).
7, a kind of automobile electric power-assisted steering permanent-magnet DC brush motor according to claim 1, it is characterized in that: described rotor winding (200c), being provided with equalizer (600) between the commutator segment (500a) of the commutator (500) under the same polarity brush (400) links to each other, average turn is long than short inner coil on one side, by equalizer (600), be communicated with the long long outer coil of another side average turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620068555 CN2872721Y (en) | 2006-01-12 | 2006-01-12 | Electrically-aided steering permanent-magnetic DC brush motor of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620068555 CN2872721Y (en) | 2006-01-12 | 2006-01-12 | Electrically-aided steering permanent-magnetic DC brush motor of automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2872721Y true CN2872721Y (en) | 2007-02-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620068555 Expired - Fee Related CN2872721Y (en) | 2006-01-12 | 2006-01-12 | Electrically-aided steering permanent-magnetic DC brush motor of automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2872721Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917107A (en) * | 2010-08-04 | 2010-12-15 | 芜湖和泰汽车电机有限公司 | Permanent magnet and direct current brush motor for automobile air conditioner |
| CN101588114B (en) * | 2009-07-13 | 2011-04-20 | 湘潭电机股份有限公司 | Method for manufacturing iron core chute of motor segmental stamping |
| CN102142756A (en) * | 2010-01-28 | 2011-08-03 | 株式会社电装 | Motor |
| CN102185450A (en) * | 2011-03-17 | 2011-09-14 | 太仓市康辉科技发展有限公司 | Permanent magnet direct current (DC) speed-reducing motor |
| CN102403858A (en) * | 2010-09-17 | 2012-04-04 | 德昌电机(深圳)有限公司 | Permanent-magnet direct-current brushed motor |
| CN103840582A (en) * | 2012-11-23 | 2014-06-04 | 德昌电机(深圳)有限公司 | Motor and rotor thereof |
| CN105119453A (en) * | 2015-09-06 | 2015-12-02 | 深圳乘方电机有限公司 | Direct current motor for driving automobile brake booster pump |
| CN106961175A (en) * | 2017-05-26 | 2017-07-18 | 江西清华泰豪三波电机有限公司 | Magneto outer rotor and the magneto for adjusting magnetic shoe shape |
-
2006
- 2006-01-12 CN CN 200620068555 patent/CN2872721Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101588114B (en) * | 2009-07-13 | 2011-04-20 | 湘潭电机股份有限公司 | Method for manufacturing iron core chute of motor segmental stamping |
| CN102142756A (en) * | 2010-01-28 | 2011-08-03 | 株式会社电装 | Motor |
| CN102142756B (en) * | 2010-01-28 | 2013-11-06 | 株式会社电装 | Motor |
| CN101917107A (en) * | 2010-08-04 | 2010-12-15 | 芜湖和泰汽车电机有限公司 | Permanent magnet and direct current brush motor for automobile air conditioner |
| CN102403858A (en) * | 2010-09-17 | 2012-04-04 | 德昌电机(深圳)有限公司 | Permanent-magnet direct-current brushed motor |
| CN102403858B (en) * | 2010-09-17 | 2016-01-06 | 德昌电机(深圳)有限公司 | A kind of permanent-magnet DC brush motor |
| CN102185450A (en) * | 2011-03-17 | 2011-09-14 | 太仓市康辉科技发展有限公司 | Permanent magnet direct current (DC) speed-reducing motor |
| CN102185450B (en) * | 2011-03-17 | 2013-02-06 | 太仓市康辉科技发展有限公司 | Permanent magnet direct current (DC) speed-reducing motor |
| CN103840582A (en) * | 2012-11-23 | 2014-06-04 | 德昌电机(深圳)有限公司 | Motor and rotor thereof |
| CN105119453A (en) * | 2015-09-06 | 2015-12-02 | 深圳乘方电机有限公司 | Direct current motor for driving automobile brake booster pump |
| CN106961175A (en) * | 2017-05-26 | 2017-07-18 | 江西清华泰豪三波电机有限公司 | Magneto outer rotor and the magneto for adjusting magnetic shoe shape |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070221 Termination date: 20100212 |