CN106253621B - A kind of EPS brushless motors of rotor unequal length - Google Patents
A kind of EPS brushless motors of rotor unequal length Download PDFInfo
- Publication number
- CN106253621B CN106253621B CN201610867021.2A CN201610867021A CN106253621B CN 106253621 B CN106253621 B CN 106253621B CN 201610867021 A CN201610867021 A CN 201610867021A CN 106253621 B CN106253621 B CN 106253621B
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- Prior art keywords
- rotor
- stator
- length
- motor
- height
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- 238000004804 winding Methods 0.000 claims abstract description 8
- 239000013589 supplement Substances 0.000 claims abstract description 3
- 230000000694 effects Effects 0.000 claims description 7
- 230000004907 flux Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- JXASPPWQHFOWPL-UHFFFAOYSA-N Tamarixin Natural products C1=C(O)C(OC)=CC=C1C1=C(OC2C(C(O)C(O)C(CO)O2)O)C(=O)C2=C(O)C=C(O)C=C2O1 JXASPPWQHFOWPL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a kind of EPS brushless motors of rotor unequal length, including machine winding, stator and rotor, the machine winding is arranged on stator；It is provided with rotor among the stator；The rotor center is provided with central shaft；The length of the rotor is more than the length of stator；The difference in height of the stator and rotor is more than the maximum axial deviation of stator and rotor；The difference in height of the stator and rotor isOrWhen there is axial deviation in rotor, rotor difference in heightOrTo supplement the deviation of motor axial centre appearance, motor effective length will not change, the output characteristics of motor will not change, and then the power density of motor will not reduce, when EPS brushless motor rotors are not equal altitude, the motor component axial dimension grade of tolerance can reduce, to which rotor not equal altitude structure can reduce EPS brushless motor costs, it is highly practical, use easy to spread.
Description
Technical field
The present invention relates to brushless motor technical field, specially a kind of EPS brushless motors of rotor unequal length.
Background technology
EPS system is exactly that power density is wanted greatly, but in motor practical set to the critically important requirement of brushless motor, electricity
The axial centre of machine stator and the axial centre of rotor are can be devious, and the consequence of this deviation is the rotor coincidence of motor
Part, which is effective length, to become smaller, i.e., the effective area of magnetic flux can reduce, to also reduce main flux, the nominal torque of motor
It will reduce.To reduce the power density of EPS brushless motors.
Invention content
The prior art is difficult to meet the needs of people, above-mentioned in order to solve the problems, such as, the present invention proposes a kind of fixed
The EPS brushless motors of rotor unequal length.
To achieve the above object, the present invention provides the following technical solutions：A kind of brushless electricity of EPS of rotor unequal length
Machine, including machine winding, stator and rotor, the machine winding are arranged on stator；It is provided with rotor among the stator；Institute
It states rotor center and is provided with central shaft；The length of the rotor is more than the length of stator；The difference in height of the stator and rotor is big
In the maximum axial deviation of stator and rotor；The difference in height of the stator and rotor isOr。
Further, the axial centre of the stator is aligned with the axial centre of rotor.
Further, when the ratio of the length of stator and internal diameter is less than 0.5, consider the edge effect of air gap, stator and rotor
Difference in height take, wherein K is coefficient, takes 0.01-0.05,For air gap, the length of rotor=。
Further, when the ratio of the length of stator 2 and internal diameter is more than 0.5, do not consider the edge effect of air gap, stator with turn
The difference in height of son takes, wherein K is coefficient, takes 0.01-0.05, the length of rotor=。
Further, when axial deviation occur in stator and rotor, stator is poor with rotor heightOrTo supplement
The deviation that motor axial centre occurs, the main flux of motor will not reduce, and power of motor density will not change.
Compared with prior art, the beneficial effects of the invention are as follows：When there is axial deviation in rotor, rotor difference in heightOrThe deviation of motor axial centre appearance is supplemented, motor effective length will not change, the output characteristics of motor
It will not change, and then the power density of motor will not reduce, when EPS brushless motor rotors are not equal altitude, zero, motor
The part axial dimension grade of tolerance can reduce, to which rotor not equal altitude structure can reduce EPS brushless motor costs, practicability
By force, use easy to spread.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is rotor relative to stator axial dipole field schematic diagram to the left；
Fig. 3 is rotor relative to stator axial dipole field schematic diagram to the right；
In figure：1- machine windings, 2- stators, 3- rotors.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.According to
The design method of targets design parameters, EPS brushless motors is consistent with conventional method, and this will not be detailed here.Necessity of motor is attached
Parts such as front and rear cover, casing and bearing etc. is identical with conventional motors, and with the intention of patent of the present invention without directly connection
System, so no longer lifting in specific implementation mode.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under the premise of creative work, shall fall within the protection scope of the present invention.
A kind of EPS brushless motors of rotor unequal length, including machine winding 1, stator 2 and rotor 3, the motor around
1 setting of group is on the stator 2；Rotor 3 is provided among the stator 2；The rotor 3 is provided centrally with central shaft 4；The rotor
3 length is more than the length of stator 2；The difference in height of the stator 2 and rotor 3 is more than stator 2 and the maximum axial of rotor 3 is inclined
Difference；The stator 2 and the difference in height of rotor 3 areOr。
Further, the axial centre of the stator 2 is aligned with the axial centre of rotor 3.
Further, when the ratio of the length of stator 2 and internal diameter is less than 0.5, consider the edge effect of air gap, stator 2 with turn
The difference in height of son 3 takes, wherein K is coefficient, takes 0.01-0.05,For air gap, the length of rotor 3=。
Further, when the ratio of the length of stator 2 and internal diameter is more than 0.5, do not consider the edge effect of air gap, stator 2 with
The difference in height of rotor 3 takes, wherein K is coefficient, takes 0.01-0.05, the length of rotor 3=。
Further, when axial deviation occur in stator 2 and rotor 3, stator 2 and 3 difference in height of rotorOrCome
The deviation that motor axial centre occurs is supplemented, the main flux of motor will not reduce, and power of motor density will not change.
Embodiment：
The length of stator 2For 47mm, internal diameterFor 51mm, major diameter ratioIt is more than 0.5 for 0.92, does not consider air gap
Edge effect, stator 2 and the difference in height of rotor 3 takeFor 1.5mm, wherein K is coefficient, takes 0.03, the length of rotor 3==48.5mm.When axial deviation occur in stator 2 and rotor 3, stator 2 is supplemented with 3 difference in height 1.5mm of rotor
The deviation that motor axial centre occurs, motor effective length will not change, and the power density of motor will not reduce.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (5)
1. a kind of EPS brushless motors of rotor unequal length, including machine winding (1), stator (2) and rotor (3), feature
It is：The machine winding (1) is arranged on stator (2)；It is provided with rotor (3) among the stator (2)；The rotor (3)
It is provided centrally with central shaft (4)；The length of the rotor (3) is more than the length of stator (2)；The stator (2) and rotor (3)
Difference in height is more than the maximum axial deviation of stator (2) and rotor (3)；The stator (2) and the difference in height of rotor (3) areOrWherein Ls is the length of stator (2), and λ is the ratio of stator (2) length and internal diameter, and K is coefficient, and σ is gas
Gap.
2. a kind of EPS brushless motors of rotor unequal length according to claim 1, it is characterised in that：The stator
(2) axial centre is aligned with the axial centre of rotor (3).
3. a kind of EPS brushless motors of rotor unequal length according to claim 1, it is characterised in that:Stator (2)
When the ratio of length and internal diameter is less than 0.5, consider that the edge effect of air gap, stator (2) and the difference in height of rotor (3) takeWherein K is coefficient, and it is air gap, the length of rotor (3) to take 0.01-0.05, σ
4. a kind of EPS brushless motors of rotor unequal length according to claim 1, it is characterised in that:Stator (2)
When the ratio of length and internal diameter is more than 0.5, do not consider that the edge effect of air gap, stator (2) and the difference in height of rotor (3) take
Wherein K is coefficient, takes 0.01-0.05, the length of rotor (3)
5. a kind of EPS brushless motors of rotor unequal length according to claim 1, it is characterised in that:When stator (2)
When there is axial deviation with rotor (3), stator (2) and rotor (3) difference in heightOrTo supplement motor axial centre
The main flux of the deviation of appearance, motor will not reduce, and power of motor density will not change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610867021.2A CN106253621B (en) | 2016-09-29 | 2016-09-29 | A kind of EPS brushless motors of rotor unequal length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610867021.2A CN106253621B (en) | 2016-09-29 | 2016-09-29 | A kind of EPS brushless motors of rotor unequal length |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106253621A CN106253621A (en) | 2016-12-21 |
| CN106253621B true CN106253621B (en) | 2018-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610867021.2A Active CN106253621B (en) | 2016-09-29 | 2016-09-29 | A kind of EPS brushless motors of rotor unequal length |
Country Status (1)
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| CN (1) | CN106253621B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712415B (en) * | 2017-02-14 | 2018-12-25 | 宁波诺丁汉大学 | Motor without position sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105057424A (en) * | 2015-08-12 | 2015-11-18 | 北京首钢股份有限公司 | Method and device for machining strip steel |
| CN105304300A (en) * | 2015-10-08 | 2016-02-03 | 上海赢双电机有限公司 | Variable reluctance resolver capable of axial movement |
| CN206349899U (en) * | 2016-09-29 | 2017-07-21 | 日本电产凯宇汽车电器（江苏）有限公司 | A kind of EPS brushless electric machines of rotor unequal length |
-
2016
- 2016-09-29 CN CN201610867021.2A patent/CN106253621B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105057424A (en) * | 2015-08-12 | 2015-11-18 | 北京首钢股份有限公司 | Method and device for machining strip steel |
| CN105304300A (en) * | 2015-10-08 | 2016-02-03 | 上海赢双电机有限公司 | Variable reluctance resolver capable of axial movement |
| CN206349899U (en) * | 2016-09-29 | 2017-07-21 | 日本电产凯宇汽车电器（江苏）有限公司 | A kind of EPS brushless electric machines of rotor unequal length |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106253621A (en) | 2016-12-21 |
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Address after: No. 266, Fumin Road, Lucheng Street, Wujin District, Changzhou City, Jiangsu Province, 213000 Patentee after: Nedco Kaiyu Automotive Appliances (Jiangsu) Co.,Ltd. Address before: No. 156 Dongfang East Road, Economic Development Zone, Changzhou City, Jiangsu Province, 213000 Patentee before: NIDEC KAIYU AUTO ELECTRIC (JIANGSU) Co.,Ltd. |
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