CN207117381U - A kind of cage type asynchronous induction machine of new-energy automobile - Google Patents
A kind of cage type asynchronous induction machine of new-energy automobile Download PDFInfo
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- CN207117381U CN207117381U CN201721204048.XU CN201721204048U CN207117381U CN 207117381 U CN207117381 U CN 207117381U CN 201721204048 U CN201721204048 U CN 201721204048U CN 207117381 U CN207117381 U CN 207117381U
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Abstract
A kind of cage type asynchronous induction machine of new-energy automobile, belong to Y-series induction machine field.Solve the problems, such as the air cooling way radiating effect difference of induction machine in new-energy automobile and rotor temperature rise under high power density.Cage bar is located in the rotor slot of rotor core in the utility model, and cage bar both ends are fixedly connected with end ring；Casing includes inner casing and outer cage, and stator core is fixed on inner casing, N number of annulus is uniformly provided with along the axial direction of inner casing, guiding gutter is formed between two adjacent annulus, and each annulus is provided with a gap, gap on all odd number annulus forms straight line, and the gap on all even number annulus forms another straight line, and two straight lines formed by gap are symmetrical arranged on the outer wall of inner casing；Outer cage is provided with water inlet and delivery port, and water inlet and delivery port connect with guiding gutter.The utility model is mainly used on new-energy automobile.
Description
Technical field
The utility model belongs to Y-series induction machine field.
Background technology
Automobile is the important vehicles of modern society, and convenient, comfortable trip service is provided for people, but traditional
Fuel combustion vehicle generates substantial amounts of harmful exhaust in use, and exacerbates the dependence to non-renewable petroleum resources.Through
After discussing and exploring for many years, it is than more consistent view for auto industry future development both at home and abroad：21 century is one and faced
The century of the energy and environment huge challenge, conventional fuel oil automobile will develop to the electric automobile direction of efficient low-discharging.
For new-energy automobile, the power density of existing most of motor systems is still relatively low, limits whole
The further raising of car power performance.Following new-energy automobile requirement increases substantially the power density of its drive system, is
The more powerful power vacating space of configuration.From the point of view of power assembly, high-speed electric expreess locomotive and planetary reduction gear are integrated into one
The compact reducing motor drive system of body by be a reasonable solution.
Squirrel cage induction motor is also one of prioritizing selection of new-energy automobile drive system.Compared to magneto, its rotor
Simple and reliable for structure, material is relatively low with manufacturing cost.Speed adjustable range is wide, and control device is simple, and low regime output torque is larger；And
Weak magnetic is convenient, has very wide permanent work(range of operation.The general power density of induction machine is small in new-energy automobile, motor operation effect
Rate is low, in new-energy automobile induction machine typically by the way of air-cooled, radiating effect is poor, and rotor is real using aluminum material
It is existing, temperature rise.Therefore, need badly and provide that a kind of power density is big and good heat dissipation effect, the low induction machine of temperature rise.
Utility model content
The utility model is existed to solve the air cooling way radiating effect of induction machine in new-energy automobile difference and rotor
Under high power density the problem of temperature rise；The utility model provides a kind of cage type asynchronous induction machine of new-energy automobile.
A kind of cage type asynchronous induction machine of new-energy automobile, it includes stator, rotor and casing；Stator and rotor are same
Axle is set in casing, and stator is fixed on casing, and rotor is fixed in rotating shaft；Air gap between stator and rotor be present；Stator
Including stator core and stator winding；Stator winding is embedded in the stator slot of stator core；
Two ports of casing are sealed by former and later two end caps respectively；
Rotor includes rotor core, cage bar and end ring；Cage bar is located in the rotor slot of rotor core, and cage bar both ends and end
Ring is fixedly connected；
Casing includes inner casing and outer cage, and stator core is fixed on inner casing, is uniformly set along the axial direction of inner casing
There is N number of annulus, guiding gutter is formed between adjacent two annulus, and each annulus is provided with a gap,
Gap on all odd number annulus forms straight line, and the gap on all even number annulus forms another
Bar straight line, two straight lines formed by gap are symmetrical arranged on the outer wall of inner casing；
Outer cage is provided with water inlet and delivery port, and water inlet and delivery port connect with guiding gutter.
The beneficial effect that the utility model is brought is that the utility model to the aspect of structure two of casing and rotor by carrying out
Improve, motor is cooled by way of water cooling first so that the radiating of motor is uniform, radiating rate improve 5 times with
On, secondly, the overall temperature rise of motor is reduced by changing material and the structure of rotor portion, and the structure of rotor portion is improved
Manufacture craft is simple afterwards, low manufacture cost, and the design of end ring effectively ensure that the mechanical strength of rotor.
Water cooling casing structure design principle：Common air cooling way can not meet the cooling requirement of motor after improvement, again
The structure of water cooling casing is designed, emphasis is the design of inner casing, also has adjacent water channel connection reasonable wide to set to channel structure
Meter, to meet the cooling requirement of motor.
For a kind of cage type asynchronous induction machine of new-energy automobile because external dimensions is limited, it is reasonable that its cooling system is carried out
Design, not only can effectively reduce motor temperature, can also reduce fluid flows by resistance, reduction energy consumption, raising cooling effectiveness, protect
Demonstrate,prove the safe and stable operation of motor.Reduce adjacent water channel connectivity part width and the shadow of channel structure fluid flow resistance and flow velocity
Ring, improve cooling effectiveness, reduce the pressure loss.
Brief description of the drawings
Fig. 1 is a kind of main section view of part of the cage type asynchronous induction machine of new-energy automobile described in the utility model
Figure；Reference 6 represents support；
Fig. 2 is the structural representation of rotor；
Fig. 3 is the three dimensional structure diagram figure of inner casing；
Fig. 4 is Fig. 3 main sectional view；
Fig. 5 is the relative position relation figure of inner casing and outer cage；
Fig. 6 is the three dimensional structure diagram of rotor core；
Fig. 7 is Fig. 6 partial schematic diagram；
Fig. 8 is the structural representation of stator core；
Fig. 9 is Fig. 8 partial schematic diagram；
Figure 10 is the relative position relation figure of stator core and rotor core.
Embodiment
Embodiment one：Illustrate present embodiment, a kind of new energy vapour described in present embodiment referring to Fig. 1 to Figure 10
Automobile-used cage type asynchronous induction machine, it includes stator 1, rotor 2 and casing 3；Stator 1 and rotor 2 are coaxially disposed positioned at casing 3
Interior, stator 1 is fixed on casing 3, and rotor 2 is fixed in rotating shaft 4；Air gap be present between stator 1 and rotor 2；Stator 1 includes stator
Iron core 1-1 and stator winding 1-2；Stator winding 1-2 is embedded in stator core 1-1 stator slot；
Two ports of casing 3 are sealed by former and later two end caps 5 respectively；
Rotor 2 includes rotor core 2-1, cage bar 2-2 and end ring 2-3；Cage bar 2-2 is located at rotor core 2-1 rotor slot
It is interior, and cage bar 2-2 both ends are fixedly connected with end ring 2-3；
Casing 3 includes inner casing 3-1 and outer cage 3-2, and stator core 1-1 is fixed on inner casing 3-1, along inner casing
3-1 axial direction is uniformly provided with N number of annulus 3-1-1, and guiding gutter 3-1-2, and each annulus are formed between adjacent two annulus 3-1-1
3-1-1 is provided with a gap 3-1-3,
Gap 3-1-3 on all odd number annulus 3-1-1 forms straight line, all even number annulus 3-1-1
On gap 3-1-3 form another straight line, two straight lines formed by gap 3-1-3 are symmetrical on inner casing 3-1 outer wall
Set；
Outer cage 3-2 is provided with water inlet 7 and delivery port 8, and water inlet 7 and delivery port 8 connect with guiding gutter 3-1-2.
Present embodiment, the gap 3-1-3 on all odd number annulus 3-1-1 form straight line, all even numbers
Gap 3-1-3 on individual annulus 3-1-1 forms another straight line, and such distribution can make by adjacent guide groove 3-1-2
Current reach next gap 3-1-3 simultaneously with same speed, and the flow regime of water can preferably be stablized in turbulent condition, increase
The heat convection ability of strong water, then strengthen the cooling effect of water cooling casing.
Embodiment two：Illustrate present embodiment, present embodiment and embodiment one referring to Fig. 1 to Figure 10
A kind of difference of the cage type asynchronous induction machine of described new-energy automobile is that the cage bar 2-2 in described rotor 2 is used
Copper material is realized.
Present embodiment, it is contemplated that a kind of cage type asynchronous induction machine of new-energy automobile described in the utility model is high
Power density motor, and the temperature rise of this kind of high power density motor can be higher, therefore, cage bar 2-2 is realized using copper material, can
So that rotor loss and temperature rise is greatly lowered.
Asynchronous machine efficiency does not have the reason for magneto efficiency high to be, asynchronous machine after activation, rotor windings meeting
Continue to produce a large amount of losses.Make cast-aluminum rotor of the prior art into copper rotor, because the resistivity ratio aluminium of copper is much smaller, institute
So that rotor loss can be greatly lowered, motor each several part electromagnetic consumable can be lost in the form of heat, so reducing
Rotor loss, efficiency can be both improved, temperature rise can be reduced again, extend electrical machinery life.And the hardness of copper is bigger than aluminium, strengthens
The mechanical strength of rotor, electrical machinery life can also be extended.
Embodiment three：Illustrate present embodiment, present embodiment and embodiment one referring to Fig. 1 to Figure 10
Or a kind of difference of the cage type asynchronous induction machine of new-energy automobile described in two is, described end ring 2-3 is provided with logical
Hole, cage bar 2-2 are inserted in through hole, and are welded and fixed with end ring 2-3.
Present embodiment, during the manufacturing of rotor 2, first cage bar 2-2 is inserted in rotor slot, then in cage bar 2-
2 both ends put end ring 2-3, are welded in end ring 2-3 and cage bar 2-2 end faces, and this welding method difficulty is small and manufacturing cost
It is low so that every cage bar is welded in through hole, and the fixation of cage bar is more firm, not easy to crack, and end ring 2-3 knot
Structure design effectively ensure that the mechanical strength of rotor, can complete inexpensive, efficient copper core rotor manufacture.
Cage bar in the rotor 2 of prior art is made of aluminum material more, rotor loss and temperature rise, and some copper cores turn
The squirrel cage induction motor of son, the welding procedure of copper core rotor need to use induction brazing, and cost is higher, and its cage bar end ring is circle
Column construction, cylindrical end ring entirety is welded with cage bar during welding, cost of manufacture is high, and difficulty of construction is big.
Due to the condition of work of rotor, the intensity requirement of butt welding contact is bigger.If pad damages, gently then influence whole
The performance of individual motor, it is heavy then cause rotor to damage.
Embodiment four：Illustrate present embodiment, present embodiment and embodiment one referring to Fig. 1 to Figure 10
A kind of difference of the cage type asynchronous induction machine of described new-energy automobile is, the single line footpath of the stator winding 1-2
Scope is 0.9mm~1.06mm, and stator winding 1-2 is embedded by the way of several paralleled conductor, and the electricity on stator winding 1-2
Density≤7.5A/mm2。
In present embodiment,
(A)：The key dimension relational expression of motor is shown in formula (formula one)：
In formula, D is armature diameter, lefFor the computational length of armature, P' is to calculate power, α 'pFor the effective pole arc coefficients；KNm
For the form factor of air-gap field；KdpFor the winding coefficient of armature；A is specific electric load；BδFor air gap flux density；CAFor constant of the machine.
In motor, the numerical relation between rotor speed n and power frequency f is shown in formula two：
It can be seen that by formula oneEqual to constant CA, andBy changing stator winding line
Footpath Ac, specific electric load A can be increased, then reduce constant of the machine CA, constant of the machine CAIt is inversely proportional with power of motor P', so motor
Power grade can increase.
(B)：Rotating speed n and power frequency f proportionals are drawn by formula two.
By formula one it can be seen that rotating speed n and power P ' proportional.
This motor increases rotating speed n by changing supply frequency, then hoisting power grade.
By above-mentioned two, the power P of the utility model motor ' be improved significantly, power ascension close to 19 times,
But volume increase is comparatively little.Therefore the cage type asynchronous induction machine of a kind of new-energy automobile described in the utility model
Power density can be significantly increased.
Concrete application：
By taking the 4kW induction conductivities of 30 grooves as an example：Rated power reaches 75kW.New-energy automobile is to motor
Volume requirement is especially high, and the utility model is compared to the Y2-280S-2 75kW induction machines of same power grade, motor volume contracting
It is small to fully meet the performance requirement of automobile close to 4.5 times, if wanting to continue to improve automotive performance, two can be used in the car
Motor after platform improves, along with controller forms dual-motor drive system, peak torque can reach 400Nm.The rotor
Using the cage-type rotor of routine, it is not necessary to which special labyrinth, manufacturing process is simple, easy to maintenance, reliable.This practicality
A kind of cage type asynchronous induction machine of new-energy automobile of new proposition is reliable, and cost is relatively low, simple in construction, and performance is excellent
It is different, can meet the needs of new-energy automobile motor significantly, the motor not only has important in new-energy automobile machine field
Meaning, be applied equally to need among the occasion of pot motor.
A kind of structure of the cage type asynchronous induction machine of new-energy automobile described in the utility model is not limited to above-mentioned each
Concrete structure described in embodiment, it can also be the reasonable combination of the technical characteristic described in the respective embodiments described above.
Claims (4)
1. a kind of cage type asynchronous induction machine of new-energy automobile, it includes stator (1), rotor (2) and casing (3)；Stator
(1) it is coaxially disposed with rotor (2) in casing (3), stator (1) is fixed on casing (3), and rotor (2) is fixed on rotating shaft (4)
On；Air gap be present between stator (1) and rotor (2)；Stator (1) includes stator core (1-1) and stator winding (1-2)；Stator around
Group (1-2) is embedded in stator core (1-1) stator slot；
Two ports of casing (3) are sealed by former and later two end caps (5) respectively；
Characterized in that, rotor (2) includes rotor core (2-1), cage bar (2-2) and end ring (2-3)；Cage bar (2-2), which is located at, to be turned
In the rotor slot of sub- iron core (2-1), and cage bar (2-2) both ends are fixedly connected with end ring (2-3)；
Casing (3) includes inner casing (3-1) and outer cage (3-2), and stator core (1-1) is fixed on inner casing (3-1), edge
The axial direction of inner casing (3-1) is uniformly provided with N number of annulus (3-1-1), and guiding gutter (3- is formed between adjacent two annulus (3-1-1)
1-2), and each annulus (3-1-1) is provided with a gap (3-1-3),
Gap (3-1-3) on all odd number annulus (3-1-1) forms straight line, all even number annulus (3-1-
1) gap (3-1-3) on forms another straight line, by two straight lines that gap (3-1-3) is formed in the outer of inner casing (3-1)
It is symmetrical arranged on wall；
Outer cage (3-2) is provided with water inlet (7) and delivery port (8), water inlet (7) and delivery port (8) with guiding gutter (3-1-
2) connect.
2. the cage type asynchronous induction machine of a kind of new-energy automobile according to claim 1, it is characterised in that described
Cage bar (2-2) in rotor (2) is realized using copper material.
A kind of 3. cage type asynchronous induction machine of new-energy automobile according to claim 1 or 2, it is characterised in that institute
The end ring (2-3) stated is provided with through hole, and cage bar (2-2) is inserted in through hole, and is welded and fixed with end ring (2-3).
4. the cage type asynchronous induction machine of a kind of new-energy automobile according to claim 1, it is characterised in that described fixed
The single wire range of sub- winding (1-2) is 0.9mm~1.06mm, and stator winding (1-2) is carried out by the way of several paralleled conductor
Embed, and electric density≤7.5A/mm on stator winding (1-2)2。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721204048.XU CN207117381U (en) | 2017-09-19 | 2017-09-19 | A kind of cage type asynchronous induction machine of new-energy automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721204048.XU CN207117381U (en) | 2017-09-19 | 2017-09-19 | A kind of cage type asynchronous induction machine of new-energy automobile |
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| CN207117381U true CN207117381U (en) | 2018-03-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681811A (en) * | 2017-09-19 | 2018-02-09 | 哈尔滨理工大学 | A kind of cage type asynchronous induction machine of new-energy automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681811A (en) * | 2017-09-19 | 2018-02-09 | 哈尔滨理工大学 | A kind of cage type asynchronous induction machine of new-energy automobile |
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