CN106787552A - A kind of copper casting rotor induction machine - Google Patents
A kind of copper casting rotor induction machine Download PDFInfo
- Publication number
- CN106787552A CN106787552A CN201710112032.4A CN201710112032A CN106787552A CN 106787552 A CN106787552 A CN 106787552A CN 201710112032 A CN201710112032 A CN 201710112032A CN 106787552 A CN106787552 A CN 106787552A
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- CN
- China
- Prior art keywords
- rotor
- stator
- winding
- sliver
- induction machine
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
- H02K17/165—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors characterised by the squirrel-cage or other short-circuited windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Induction Machinery (AREA)
Abstract
The present invention relates to a kind of copper casting rotor induction machine, including stator, rotor and rotating shaft, the rotor is located in stator, and has air gap between stator and rotor, the stator includes stator tooth, stator slot, armature winding and stator yoke, and the rotor includes rotor core, sliver and end ring；Its innovative point is：The winding type that the armature winding is used is single and two layer winding, the levels conductor of the same phase in short distance winding is used into Single-layer Windings altogether, and out of phase levels conductor uses Double Layer Winding, and couple together its end by concentric double layer winding end shape, single and two layer winding is formed, rotor bar uses the new structure of concentric camber line of wide at the top and narrow at the bottom, the upper bottom with rotating shaft core as the center of circle.The present invention can improve starting performance, save stator winding and rotor cage copper, reduce motor temperature rise, improve electric efficiency.
Description
Technical field
The present invention relates to a kind of induction machine, and in particular to a kind of copper casting rotor induction machine on electric automobile.
Background technology
With economic development at full speed, China's automobile sales volume is presented and increased continuously and healthily.Since two thousand nine, China oneself
Persistently turn into the maximum automobile production and marketing state in the whole world.By 2014, the oil-fired vehicle quantity of China more than 2.5 hundred million, wherein
Car ownership is up to 1.4 hundred million.At the same time, the sustainable growth of car ownership, huge burden is brought to environment.With
Automobile usage amount sustainable growth, the pollution that its exhaust emissions brings directly results in going from bad to worse for environment.This year, the whole nation about 1/
More than 2 city is shrouded by haze for a long time, the air quality of urban oneself through having reached severe contamination degree, greenhouse
Effect is aggravated.Therefore, control and reduce automobile that the pollution of environment will be turned into one of Chinese society harmonious development urgent need to resolve
Key subjects.
Compared with conventional fuel oil automobile, electric automobile has many advantages, such as.Driving motor for electric automobile not only efficiency high, and
And in braking, motor can be converted into generator operation, and electric power storage is stored in so as to the kinetic energy of automobilism is changed into electric energy
Pond, greatly increases energy utilization rate.In addition, the use of electric automobile will not be influenceed by variety of energy sources with energy reserve.
The electric power that it is used both may be from the fossil energies such as coal, oil, natural gas, it is also possible to come from waterpower, wind-force, the sun
Energy, underground heat, tide you, the new forms of energy resource such as nuclear fission.Therefore, the development of electric automobile will not be not only limited by the energy is single,
Whole New Energy Industry can be more promoted actively rapidly to develop.Additionally, the charging electric vehicle time can be according to electric power system electricity
The change of net load and adjust, can so play Peak Load Adjustment in terms of electricity consumption to power network, the load of active balance power network, drop
The peak-valley difference of low power network, so as to improve the economic benefit of power network, reaches the purpose of energy-conservation.In terms of environmental protection, electric automobile is used
In can not only reduce atmosphere pollution and noise pollution, accumulator of electric car can also be carried out at centralized recovery after scrapping
Reason.Therefore, electric automobile becomes study hotspot because of the problems such as solving energy shortage and environmental protection.
Three big technologies in electric automobile are：Battery and its administrative skill, motor drive and its control technology, vehicle skill
Art, although current on-vehicle battery technology is still the bottleneck of Development of Electric Vehicles, but motor technology and electric machines control technology
It is to hinder Development of Electric Vehicles key factor.The electric automobile of superior performance needs to have high torque density with high power density
Motor system realizes quick startup, climbing and high-performance cruise, it is ensured that the high efficiency in the range of whole service is to reach
Good energy-conservation, powerful momentary overload capacity, its high reliability and robustness to meet various adverse circumstances demand and
Suitable price.This method for designing to traditional industry motor proposes new challenge with performance.
At present, Motors used in EV mainly has dc motor（DCM）, induction conductivity（IM）, brushless, permanently electricity
Motivation（PM-BLM）And switched reluctance motor（SRM）Four classes.The motor of electric automobile belongs to specific type of electric machine, is electronic vapour
The critical component of car.Make electric automobile that there is good service behaviour, motor should have speed adjustable range wider and compared with
Rotating speed high, sufficiently large starting torque, small volume.The property of light weight, efficiency high and and energy feedback strong with dynamic brake
Energy.In the motor that current electric motor car is used, dc motor is substantially by ac motor, permanent magnet motor or switch
Reluctance motor is replaced.Motor used by electric automobile develops to high-power and miniaturization.
Among these, induction machine because of its simple structure, with low cost, reliability is high, maintenance is simple, practical, very
Motor is suitable as to apply in electric automobile.Although its control is relative complex, as vector controlled is managed in recent years
The tremendous expansion of opinion and progress, the various control algolithms for asynchronous machine are arisen at the historic moment, and theoretically solve asynchronous machine
Control problem；Meanwhile, the extensive use of IGBT constant power devices significantly reduces the control core such as use cost, DSP and ARM
The fast development of piece, is that the complex control of asynchronous machine creates advantage, and then be the extensive of asynchronous machine in practice
Using laying a good foundation.In recent years, asynchronous motor torque output characteristics has reached the requirement of driving motor for electric automobile.Cause
This, it is electric as driving all from asynchronous machine in the power assembly of many money electric automobiles including the numerous countries including China
Machine, the product of existing many volume productions is on sale.
But as the motor of electric automobile, relative to other kinds of motor, traditional cast-aluminum rotor induced electricity
Machine also has smaller, the less efficient shortcoming of power density, in order to overcome these shortcomings, research and development more high power density and more efficient
The induction machine of rate is imperative.In the loss of induction machine, rotor loss occupies about 20%~25% ratio, drop
Low this partition losses are also just into putting forward an efficient important technical.Because the resistivity of copper is the resistivity of aluminium
60% or so, traditional aluminium is substituted using the excellent copper of resistivity, rotor resistance can be reduced, so as to reduce rotor loss, improve
Electric efficiency.
In recent years, in order to implement a scientific outlook on development, the coordination sustainable development of human and environment is realized, China also promotes energetically
Motor efficiency improves process, has issued GB18613-2012 efficiency new standards, and plan is phased out low-energy-efficiency motor.Such
Under overall background, copper casting rotor induction machine undoubtedly will be as one of electromechanics trade important research direction.And it is directed to copper casting rotor
Characteristic, rotor and stator to motor are redesigned, and can to greatest extent improve the efficiency of motor, to obtain more high energy
Effect.
The content of the invention
The purpose of the present invention is：There is provided one kind can improve starting performance, save stator winding copper, improve electric efficiency
Copper casting rotor induction machine, to overcome the deficiencies in the prior art.
In order to achieve the above object, the technical scheme is that：A kind of copper casting rotor induction machine, including stator, turn
Son and rotating shaft, the rotor are located in stator, and have air gap between stator and rotor, the stator include stator tooth, stator slot,
Armature winding and stator yoke, the rotor include rotor core, sliver and end ring；Its innovative point is：
The winding type that the armature winding is used is single and two layer winding, and the levels conductor of the same phase in short distance winding is closed
Get up and use Single-layer Windings, and out of phase levels conductor uses Double Layer Winding, and will by concentric double layer winding end shape
Its end couples together, and forms single and two layer winding.
In the above-mentioned technical solutions, the rotor core is provided with sliver groove, and the sliver is integral type structure with end ring, and
The sliver is inserted into the sliver groove of rotor core.
In the above-mentioned technical solutions, the flute profile of the sliver groove of the rotor core is identical with the shape of sliver, and rotor iron
Bottom and bottom are the concentric arcs with the axle center of rotating shaft as the center of circle in the flute profile of the sliver groove of the heart.
In the above-mentioned technical solutions, the sliver is arcuate structure wide at the top and narrow at the bottom, and upper bottom is to be with the axle center of rotating shaft
The concentric camber line in the center of circle.
In the above-mentioned technical solutions, the rotor core is respectively fixed at two ends with end ring, and end ring is tight with rotor core
Closely connected conjunction.
The good effect that has of the present invention is：Because the winding type that armature winding of the present invention is used is single bilayer
Winding, Single-layer Windings are used by the levels conductor of the same phase in short distance winding altogether, and out of phase levels conductor is adopted
With Double Layer Winding, and its end is coupled together by concentric double layer winding end shape, form single and two layer winding；The present invention is adopted
Single and two layer winding has the characteristic of Double Layer Winding compared with Single-layer Windings, i.e., with preferable air-gap field waveform, preferably
The series of advantages such as starting performance and relatively low added losses.From structure, single and two layer winding than Double Layer Winding shorter
Actual pitch under, larger effective pitch can be obtained so that fundamental wave winding coefficient improve.When the effective turn phase of motor
Deng when, it is possible to reduce the actual number of turn；When effective pitch is identical, actual pitch can shorten, so as to save winding copper, copper loss
Consumption is also corresponding to be reduced, and efficiency is accordingly improved.That is the present invention has that starting performance is good, and added losses are low, few excellent of winding copper consumption
Point, improves electric efficiency.
Brief description of the drawings
Fig. 1 is a kind of structural representation of specific embodiment of the invention；
Local magnetic line of force distribution schematic diagram when Fig. 2 is nominal load of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing and the embodiment for being given, the present invention is further illustrated, but is not limited thereto.
As shown in Figure 1, 2, a kind of copper casting rotor induction machine, including stator 1, rotor 11 and rotating shaft 5, the rotor 11
In there is air gap 3 in stator 1, and between stator 1 and rotor 11, the stator 1 includes stator tooth 2, stator slot 6, the and of armature winding 7
Stator yoke 8, the rotor 11 includes rotor core 10, sliver 4 and end ring 9；
The winding type that the armature winding 7 is used is single and two layer winding, by the levels conductor of the same phase in short distance winding
Single-layer Windings are used altogether, and out of phase levels conductor uses Double Layer Winding, and by concentric double layer winding end shape
Its end is coupled together, single and two layer winding is formed, the pitch of winding can be chosen according to the overtone order of desired reduction.
Rotor core of the present invention 10 is provided with sliver groove, and the sliver 4 and end ring 9 are integral type structure, and described leads
Bar 4 is inserted into the sliver groove of rotor core 10.Particularly, the sliver 4 and end ring 9 are that die casting is connected as one formula knot
Structure, and the integral structure is cast copper cage-shaped structure.
As shown in figure 1, the flute profile of the sliver groove of the rotor core 10 is identical with the shape of sliver 4, and rotor core 10
Sliver groove flute profile on bottom and bottom be concentric arcs with the axle center of rotating shaft 5 as the center of circle, both sides are to be with the axle center of rotating shaft 5
One section of straight line of the radius in the center of circle, whole flute profile is a part for the annulus with the axle center of rotating shaft 5 as the center of circle.
As shown in figure 1, the sliver 4 is arcuate structure wide at the top and narrow at the bottom, upper bottom is the axle center with rotating shaft 5 as the center of circle
Concentric camber line.So, end ring material can be saved, and improves radiating condition.
As shown in figure 1, the rotor 11 has rotor tooth and rotor slot, and the rotor slot of rotor 11 is flume structure, is turned
The angle of inclination of pilot trench is 0.5 ~ 1 rotor slot-pitch.Its benefit is can to suppress harmonic wave and torque pulsation.
Depending on the slot number of the stator slot 6 of stator of the present invention 1 and the rotor slot of rotor 11 can be by performance requirement, in this example
The slot number of the stator slot 6 of stator 1 is 36 grooves, and the slot number of the rotor slot of rotor 11 is 26 grooves.Its benefit is, in order to suppress harmonic wave.
As shown in figure 1, in order that more reasonable structure of the present invention, the rotor core 10 is respectively fixed at two ends with end ring
9, and end ring 9 is brought into close contact with rotor core 10.
Copper casting rotor induction machine of the invention can be monophase machine, or three phase electric machine, or polyphase machine.
Compared with existing similar motor, the present invention has advantages below：
1st, the rotor of existing frequency control motor there is also obvious deficiency in the response of different frequency range, and rotor resistance is with frequency
The raising of rate is presented linearly increasing trend, and this causes that motor is serious in high band heating.Copper casting rotor of the invention is using special
Some inverted arc shaped cast copper slivers, its excellent resistance characteristic is played in low frequency or high band, and rotor resistance is relatively low, so as to reduce turn
Son loss, improves electric efficiency；Its superior conductive characteristic is played in Mid Frequency or specified frequency range, rotor resistance is higher, so that
Increase motor torque square, improve the runnability of motor.
2nd, existing rotor is generally deep and narrow sliver pore structure, is influenceed by kelvin effect, when alternating current is logical
When crossing conductor, electric current will focus on conductive surface, and rotor bar utilization rate is low, and heating is serious.The present invention is using slot shape of rotor
Concentric ring structure wide at the top and narrow at the bottom, can be such that rotor current is more evenly distributed in whole sliver sectional area, effectively reduce collection
Influence of the skin effect to variable-frequency motor rotor bar electric current, improves rotor bar utilization rate, reduces rotor loss, improves motor effect
Rate.
3rd, existing rotor is generally deep and narrow sliver pore structure, when motor normal work, sliver it is average
Linear velocity is relatively low, is unfavorable for radiating.The present invention can effectively be lifted and turned using the concentric ring structure wide at the top and narrow at the bottom of slot shape of rotor
The radiating of sub- sliver, can reduce the volume of motor cooling, save installing space.
4th, existing rotor is generally deep and narrow sliver pore structure so that have larger section when end ring casts
Product.The present invention can decline low rotor end ring using the concentric ring structure wide at the top and narrow at the bottom of slot shape of rotor in identical sliver area
Volume, effectively reduces rotor cage consumptive material.
5th, use Single-layer Windings and Double Layer Winding existing motor stator more, single and two layer winding and the individual layer that the present invention is used around
Group is compared, the characteristic for having Double Layer Winding, i.e., with preferable air-gap field waveform, preferable starting performance and relatively low additional damage
The series of advantages such as consumption.From structure, single and two layer winding than Double Layer Winding under shorter actual pitch, can obtain compared with
Big effective pitch, so that fundamental wave winding coefficient is improved.When the effective turn of motor is equal, it is possible to reduce the actual number of turn；
When effective pitch is identical, actual pitch can shorten, so as to save winding copper, copper loss also accordingly reduces, and efficiency is corresponding
Improve.
Claims (5)
1. a kind of copper casting rotor induction machine, including stator（1）, rotor（11）And rotating shaft（5）, the rotor（11）Positioned at stator
（1）It is interior, and stator（1）And rotor（11）Between have air gap（3）, the stator（1）Including stator tooth（2）, stator slot（6）, electricity
Pivot winding（7）And stator yoke（8）, the rotor（11）Including rotor core（10）, sliver（4）And end ring（9）；Its feature exists
In：
The armature winding（7）The winding type for using is single and two layer winding, and the levels of the same phase in short distance winding are led
Body uses Single-layer Windings altogether, and out of phase levels conductor uses Double Layer Winding, and by concentric double layer winding end shape
Shape couples together its end, forms single and two layer winding.
2. copper casting rotor induction machine according to claim 1, it is characterised in that：The rotor core（10）It is provided with sliver
Groove, the sliver（4）With end ring（9）It is integral type structure, and the sliver（4）It is inserted into rotor core（10）Sliver groove
It is interior.
3. copper casting rotor induction machine according to claim 2, it is characterised in that：The rotor core（10）Sliver groove
Flute profile and sliver（4）Shape it is identical, and rotor core（10）Sliver groove flute profile on bottom and bottom be with rotating shaft（5）'s
Axle center is the concentric arcs in the center of circle.
4. copper casting rotor induction machine according to claim 3, it is characterised in that：The sliver（4）For wide at the top and narrow at the bottom
Arcuate structure, upper bottom is with rotating shaft（5）Axle center for the center of circle concentric camber line.
5. copper casting rotor induction machine according to claim 2, it is characterised in that：The rotor core（10）Two ends point
End ring is not fixed with it（9）, and end ring（9）With rotor core（10）It is brought into close contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710112032.4A CN106787552A (en) | 2017-02-28 | 2017-02-28 | A kind of copper casting rotor induction machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710112032.4A CN106787552A (en) | 2017-02-28 | 2017-02-28 | A kind of copper casting rotor induction machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106787552A true CN106787552A (en) | 2017-05-31 |
Family
ID=58959774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710112032.4A Pending CN106787552A (en) | 2017-02-28 | 2017-02-28 | A kind of copper casting rotor induction machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN106787552A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336878A (en) * | 2018-03-21 | 2018-07-27 | 东南大学 | A kind of not equal circles single and two layer winding copper casting rotor induction machine |
| CN109245356A (en) * | 2018-09-18 | 2019-01-18 | 艾德斯汽车电机无锡有限公司 | Circular arc joint motor |
| CN113574772A (en) * | 2019-03-22 | 2021-10-29 | Abb瑞士股份有限公司 | Induction motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102916542A (en) * | 2012-10-23 | 2013-02-06 | 朱明初 | Ultra-efficient three-phase asynchronous motor |
| CN203674821U (en) * | 2014-01-01 | 2014-06-25 | 佛山市顺德区信源电机有限公司 | High-efficiency motor possessing single and two-layer winding |
| CN105048744A (en) * | 2015-07-17 | 2015-11-11 | 中国科学院电工研究所 | Cast copper rotor for variable frequency motor |
-
2017
- 2017-02-28 CN CN201710112032.4A patent/CN106787552A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916542A (en) * | 2012-10-23 | 2013-02-06 | 朱明初 | Ultra-efficient three-phase asynchronous motor |
| CN203674821U (en) * | 2014-01-01 | 2014-06-25 | 佛山市顺德区信源电机有限公司 | High-efficiency motor possessing single and two-layer winding |
| CN105048744A (en) * | 2015-07-17 | 2015-11-11 | 中国科学院电工研究所 | Cast copper rotor for variable frequency motor |
Non-Patent Citations (3)
| Title |
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| 张俊芳等: "《电机学》", 31 January 2010, 中国电力出版社 * |
| 马德鑫: "单双层绕组在小型三相异步电动机设计中的应用", 《防爆电机》 * |
| 黄国治等: "《中小旋转电机设计手册》", 31 March 2007, 中国电力出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336878A (en) * | 2018-03-21 | 2018-07-27 | 东南大学 | A kind of not equal circles single and two layer winding copper casting rotor induction machine |
| CN109245356A (en) * | 2018-09-18 | 2019-01-18 | 艾德斯汽车电机无锡有限公司 | Circular arc joint motor |
| CN113574772A (en) * | 2019-03-22 | 2021-10-29 | Abb瑞士股份有限公司 | Induction motor |
| CN113574772B (en) * | 2019-03-22 | 2023-09-15 | Abb瑞士股份有限公司 | induction motor |
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Application publication date: 20170531 |