CN102751833A - Totally-enclosed permanent-magnet synchronous traction motor with unequal air gaps, skewed pole shoes and tangential magnetic circuit - Google Patents
Totally-enclosed permanent-magnet synchronous traction motor with unequal air gaps, skewed pole shoes and tangential magnetic circuit Download PDFInfo
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- CN102751833A CN102751833A CN2012102508692A CN201210250869A CN102751833A CN 102751833 A CN102751833 A CN 102751833A CN 2012102508692 A CN2012102508692 A CN 2012102508692A CN 201210250869 A CN201210250869 A CN 201210250869A CN 102751833 A CN102751833 A CN 102751833A
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Abstract
The invention discloses a totally-enclosed permanent-magnet synchronous traction motor with unequal air gaps, skewed pole shoes and a tangential magnetic circuit. The motor comprises a stator and a rotor, the rotor comprises a rotor core connected with a sleeve non-conductive to magnetism, and four axial equidistantly-distributed straight grooves are radially arranged at the positions, 3-7 millimeters of an inner circle away from the outer circle, of the rotor core so as to form four pole shoes. A skewed groove which skews by a stator tooth pitch, is 26-28 millimeter in width and has a thickness as same as the distance of each equidistantly-distributed straight groove away from the outer circle of the corresponding pole shoe, is arranged at a position of moving 15-17 millimeters leftward from the left edge of each straight groove to the outer circle of the corresponding pole shoe anticlockwise. A rotor magnetic circuit is the tangential magnetic circuit, and after the rotor is matched with the stator, starting with a permanent-magnet radial center line, air gaps are gradually decreased from 0 degree to 45 degrees and then gradually increased from 45 degrees to 90 degrees so as to sequentially form air gaps. By the aid of a permanent magnet excitation and totally-enclosed self-cooling structure, the totally-enclosed permanent-magnet synchronous traction motor with the unequal air gaps, the skewed pole shoes and the tangential magnetic circuit is high in power density and efficiency, conforms to the requirements of running of high-speed trains and is applicable to small-sized and lightweight industrial equipment in high-speed running.
Description
Technical field
The present invention relates to a kind of permanent-magnet synchronous traction electric machine, be specifically related to a kind of totally-enclosed air gap skewed pole-shoe tangential magnetic circuit permanent-magnet synchronous traction electric machine that do not wait.
Background technology
The bullet train development is rapid, and range of application is more and more wider.Bullet train in operation adopts asynchronous traction motor to drive at present, and 4 asynchronous traction motors are arranged on every joint motor-car, and the parallel connection back is driven by a current transformer.Power density, efficient and the power factor of asynchronous traction motor are fully optimized at present, adopt the permanent-magnet synchronous traction electric machine then can further improve power density and efficient, are the research focuses of present high-speed railway traction electric machine aspect.
The permagnetic synchronous motor structure is varied, is applicable to different application scenarios.Compare with common permagnetic synchronous motor, traction electric machine has the characteristics of high rotating speed, big capacity, high power density, high reliability, claimed structure simple, solid reliable, operate steadily, it is extremely important therefore to develop practical electric machine structure.
Summary of the invention
The objective of the invention is to provide a kind of totally-enclosed air gap skewed pole-shoe tangential magnetic circuit permanent-magnet synchronous traction electric machine that do not wait.
The technical scheme that the present invention adopts is:
The present invention includes stator and rotor two parts, stator structure comprises stator core and stator winding, and stator core adopts opening straight trough structure, and stator winding is a distribution short distance formula.Rotor comprises rotating shaft, the not magnetic conduction sleeve that is fixedly connected with rotating shaft, the rotor core that carries out feather joint with magnetic conduction sleeve not; Rotor core radially extremely has four straight troughs that axially are equally spaced apart from 3～7 millimeters of cylindricals from interior circle, forms four pole shoes, is benchmark with every straight trough the right; Around 15～17 millimeters pole shoe cylindrical places that move to left counterclockwise, have wide 26～28 millimeters, thickness is identical apart from pole shoe cylindrical thickness with the straight trough that is equally spaced and the skewed slot of the stator tooth distance that tilts, and is embedded with the permanent magnet of cutting orientation magnetizing in four axial straight troughs respectively; Rotor magnetic circuit is the tangential magnetic structure; The damping sliver is installed in pole shoe inside, and the damping sliver is parallel with rotor axis, and rotor is with after stator cooperates; With the permanent magnetic radial center line is starting point; Air gap from 0 °～45 ° from large to small, 45 °～90 ° air gaps change from small to big, and constitute periodically variable air gap successively.
The beneficial effect that the present invention has is:
The present invention is owing to adopt permanent magnet excitation and the totally-enclosed structure of cooling off certainly; There is not external contamination; Power density is high, simple in structure, efficient is high, non-maintaining, reliability is high, mechanical strength is high; Its efficient performance meets the requirement of bullet train operation, also is applicable to the industrial equipment of other high-speed cruising, especially wants little, the lightweight occasion of cube.
Description of drawings
Fig. 1 is a structural principle sketch map of the present invention.
Fig. 2 is the rotor structure sketch map.
Fig. 3 is the shape of pole shoe external diameter before without eccentric processing.
Fig. 4 is the shape of pole shoe external diameter after eccentric processing.
Among the figure: 1, stator; 2, rotor; 3, axle; 4, magnetic conduction sleeve not; 5, permanent magnet; 6, damping sliver; 7, pole shoe; 8, stator winding; 9, air gap.
Embodiment
Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is further described.
Structural principle of the present invention: this permanent-magnet synchronous traction electric machine rotor adopts skewed pole-shoe tangential magnetic structure; Permanent magnet axially inserts iron core on the rotor; Adopt interference fit that the not magnetic conduction collar of high strength is installed in the rotating shaft, the magnetic conduction collar and iron core do not carry out feather joint, and permanent magnet is embedded in the straight trough between the pole shoe; The oblique teeth groove of stator of crossing of pole shoe is provided with sliver in the pole shoe.Stator adopts open slot, and winding is a distribution short distance winding.
Like Fig. 1, shown in Figure 2, the present invention includes stator and rotor two parts, stator structure comprises stator core and stator winding, and stator core adopts opening straight trough structure, and stator winding is a distribution short distance formula; It is characterized in that: rotor 2 comprises rotating shaft 3, the not magnetic conduction sleeve 4 that is fixedly connected with rotating shaft, the rotor core that carries out feather joint with magnetic conduction sleeve 4 not; Rotor core radially extremely has four straight troughs that axially are equally spaced apart from 3～7 millimeters of cylindricals from interior circle, forms four pole shoes 7, is benchmark with every straight trough the right; Around 15～17 millimeters pole shoe cylindrical places that move to left counterclockwise, have wide 26～28 millimeters, thickness is identical apart from pole shoe 7 cylindrical thickness with the straight trough that is equally spaced and the skewed slot of the stator tooth distance that tilts, and is embedded with the permanent magnet 5 of cutting orientation magnetizing in four axial straight troughs respectively; Rotor magnetic circuit is the tangential magnetic structure; Damping sliver 6 is installed in pole shoe 7 inside, and damping sliver 6 is parallel with rotor axis, and rotor 2 is with after stator cooperates; With the permanent magnetic radial center line is starting point; Air gap from 0 °～45 ° from large to small, 45 °～90 ° air gaps change from small to big, and constitute periodically variable air gap successively.
Permanent magnet can be fixed by the notch iron core on the rotor, or is fixed by slot wedge, or is fixed by the special-purpose collar of peripheral hardware.The damping sliver can be used as the axial restraint device of rotor core.
The rotating pole-piece cylindrical is following through the method for eccentric processing:
Fig. 3 is for the circular pole piece crossed without eccentric processing, OO among Fig. 4
' ' Be the external diameter of this pole shoe, OO
' For the eccentric distance on the pole shoe symmetry axis, with O
' Be center of circle OO
' ' For doing circle in the center of circle, dash area is the pole shoe cut-out, and remaining part is the rotating pole-piece after eccentric processing.Eccentric distance is taken as the value between 0～1.5 centimetre, and concrete value obtains through the Finite Element Method computation optimization.
In the practical applications, the concrete data parameters of structure need be passed through Finite Element Method and calculated.For example: the four-pole permanent magnet sync pulling motor of a structure of the present invention, rated power is 365kW, and rated voltage is 2000V, and rated efficiency is 96.96%, and stator and rotor adopt DW465_50 model silicon steel sheet, and permanent magnet adopts the NdFe38SH model.Through the Finite Element Method calculation optimization; Obtain following structural parameters; Rotor core radially extremely has four straight troughs that axially are equally spaced apart from 5 millimeters of cylindricals from interior circle, and forms four pole shoes, is benchmark with every straight trough the right; Around the 16 millimeters pole shoe cylindrical places that move to left counterclockwise, have wide 27 millimeters, thickness and be the skewed slot of 5 millimeters and a stator tooth distance of oblique mistake.
Operation principle of the present invention is following:
The totally-enclosed air gap skewed pole-shoe tangential magnetic circuit permanent-magnet synchronous traction electric machine that do not wait of the present invention is applied to bullet train.1) per 4 motors are installed on the joint motor-car, and every motor disposes corresponding current transformer; 2) after the driver of 4 these structure permagnetic synchronous motor traction electric machines receives run signal; Detect corresponding rotor magnetic pole position, output meets the three-phase symmetrical alternating current voltage of the variable-frequency variable-voltage of service requirement, is input in the permanent-magnet synchronous traction electric machine; Rotor is to move with leg speed; The output torque is through the change-speed gearing on the bogie, drive wheels.
Claims (1)
1. the totally-enclosed air gap skewed pole-shoe tangential magnetic circuit permanent-magnet synchronous traction electric machine that do not wait comprises stator and rotor two parts, and stator structure comprises stator core and stator winding, and stator core adopts opening straight trough structure, and stator winding is a distribution short distance formula; It is characterized in that: rotor 2 comprises rotating shaft 3, the not magnetic conduction sleeve 4 that is fixedly connected with rotating shaft, the rotor core that carries out feather joint with magnetic conduction sleeve 4 not; Rotor core radially extremely has four straight troughs that axially are equally spaced apart from 3～7 millimeters of cylindricals from interior circle, forms four pole shoes 7, is benchmark with every straight trough the right; Around 15～17 millimeters pole shoe cylindrical places that move to left counterclockwise, have wide 26～28 millimeters, thickness is identical apart from pole shoe 7 cylindrical thickness with the straight trough that is equally spaced and the skewed slot of the stator tooth distance that tilts, and is embedded with the permanent magnet 5 of cutting orientation magnetizing in four axial straight troughs respectively; Rotor magnetic circuit is the tangential magnetic structure; Damping sliver 6 is installed in pole shoe 7 inside, and damping sliver 6 is parallel with rotor axis, and rotor 2 is with after stator cooperates; With the permanent magnetic radial center line is starting point; Air gap from 0 °～45 ° from large to small, 45 °～90 ° air gaps change from small to big, and constitute periodically variable air gap successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102508692A CN102751833A (en) | 2012-07-19 | 2012-07-19 | Totally-enclosed permanent-magnet synchronous traction motor with unequal air gaps, skewed pole shoes and tangential magnetic circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102508692A CN102751833A (en) | 2012-07-19 | 2012-07-19 | Totally-enclosed permanent-magnet synchronous traction motor with unequal air gaps, skewed pole shoes and tangential magnetic circuit |
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| CN102751833A true CN102751833A (en) | 2012-10-24 |
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| CN2012102508692A Pending CN102751833A (en) | 2012-07-19 | 2012-07-19 | Totally-enclosed permanent-magnet synchronous traction motor with unequal air gaps, skewed pole shoes and tangential magnetic circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101781877B1 (en) * | 2016-01-06 | 2017-09-26 | 엘지전자 주식회사 | Spoke tipe rotor, and Motor and Dishwasher having the Same |
| CN107222046A (en) * | 2017-08-09 | 2017-09-29 | 珠海格力节能环保制冷技术研究中心有限公司 | Tangential motor and tangential rotor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006238679A (en) * | 2005-02-27 | 2006-09-07 | Yoshimitsu Okawa | Single-phase permanent magnet motor |
| CN201298796Y (en) * | 2008-08-18 | 2009-08-26 | 于波 | Direct drive compositely excited wind energy generator |
| CN201717761U (en) * | 2010-06-17 | 2011-01-19 | 广东美芝精密制造有限公司 | Permanent magnet synchronous motor for compressor |
| CN102185451A (en) * | 2011-04-19 | 2011-09-14 | 南京航空航天大学 | Segmented rotor type magnetic flux switching motor with hybrid excitation and magnetic adjustment method |
| CN202713101U (en) * | 2012-07-19 | 2013-01-30 | 浙江大学 | Completely-closed permanent-magnet synchronous traction motor with unequal air gaps and skewed pole-shoe tangential magnetic circuit |
-
2012
- 2012-07-19 CN CN2012102508692A patent/CN102751833A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006238679A (en) * | 2005-02-27 | 2006-09-07 | Yoshimitsu Okawa | Single-phase permanent magnet motor |
| CN201298796Y (en) * | 2008-08-18 | 2009-08-26 | 于波 | Direct drive compositely excited wind energy generator |
| CN201717761U (en) * | 2010-06-17 | 2011-01-19 | 广东美芝精密制造有限公司 | Permanent magnet synchronous motor for compressor |
| CN102185451A (en) * | 2011-04-19 | 2011-09-14 | 南京航空航天大学 | Segmented rotor type magnetic flux switching motor with hybrid excitation and magnetic adjustment method |
| CN202713101U (en) * | 2012-07-19 | 2013-01-30 | 浙江大学 | Completely-closed permanent-magnet synchronous traction motor with unequal air gaps and skewed pole-shoe tangential magnetic circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101781877B1 (en) * | 2016-01-06 | 2017-09-26 | 엘지전자 주식회사 | Spoke tipe rotor, and Motor and Dishwasher having the Same |
| CN107222046A (en) * | 2017-08-09 | 2017-09-29 | 珠海格力节能环保制冷技术研究中心有限公司 | Tangential motor and tangential rotor |
| CN107222046B (en) * | 2017-08-09 | 2023-07-07 | 珠海格力节能环保制冷技术研究中心有限公司 | Tangential motor and tangential motor rotor |
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Application publication date: 20121024 |