CN209730915U - A kind of double cage motor rotor stamping sheet structures - Google Patents
A kind of double cage motor rotor stamping sheet structures Download PDFInfo
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- CN209730915U CN209730915U CN201920287671.9U CN201920287671U CN209730915U CN 209730915 U CN209730915 U CN 209730915U CN 201920287671 U CN201920287671 U CN 201920287671U CN 209730915 U CN209730915 U CN 209730915U
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Abstract
The utility model discloses a kind of double cage motor rotor stamping sheet structures, to improve motor starting performance, including rotor sheet body, multiple rotor punching slots are uniformly provided on rotor sheet body, each rotor punching slot includes upper cage slot and lower cage slot, the distance at lower cage groove center to rotor punching center is small to the distance than upper cage groove center to rotor sheet body center, wherein, upper cage slot is less than upper cage slot close to the groove width of lower cage slot one end far from the groove width of lower cage slot one end, and then the groove profile of upper cage slot is special-shaped dovetail groove.The groove profile of cage slot improves formation special-shaped dovetail groove on the basis of existing groove profile on the utility model, compared to traditional double cage motors, rotor kelvin effect when further improving starting, and reduce rotor slot leakage reactance, make it at the start, there is biggish starting torque and lesser starting current.
Description
Technical field
The utility model relates to rotor technical field more particularly to a kind of double cage motor rotor stamping sheet structures.
Background technique
Rotor is the key components and parts in motor, material, inner circle size, excircle dimension, flute profile size, slot cooperation etc. pair
The starting performance of motor has direct influence.Traditional motor uses deep slot type double-cage rotor, at the start, due to collection skin effect
It answers, starting current is made to concentrate on top, be equivalent to that effective cross-section is small, and effective resistance is big, power factor increases, and makes the starting of motor
Electric current reduces, and starting torque increases.In normal work, since rotor loop frequency is low, kelvin effect is minimum, double mouse cages for motor
It all plays a role, is equivalent to effective cross-section increase, effective resistance reduces.Therefore existing motor largely uses the double mouse cages of deep slot type
The starting performance of rotor, motor is improved, while the working performance of motor is also improved, this is for large-sized asynchronous electronic
Machine is particularly important, so large-sized asynchronous motor is frequently with double mouse cage current throttling type rotors.
But it is certain special occasions, biggish occasion (example: the starting of electric car) is required for starting torque, i.e.,
Make to be that double cage motors are still unable to normal starting under the influence of additional torque, may cause motor when serious and burn, it is therefore desirable to
Traditional double cage motors are optimized, starting torque is further increased.
Utility model content
To solve technical problem present in background technique, the purpose of this utility model is in the prior art in order to optimize
Double cage motors provide a kind of motor rotor stamping sheet structure for further increasing double cage motor starting performances.
To achieve the above object, the utility model is as follows using technical solution:
Since the starting torque of motor and the stator resistance of motor have close ties, i.e. starting torque TstWith turning when starting
Sub- resistance r2It is directly proportional, approximatively with start when total leakage reactance xastSquare be inversely proportional, by increasing rotor resistance when starting
Resistance value reduces leakage reactance, can there is larger improvement to electric motor starting torque.
Therefore, the utility model proposes a kind of double cage motor rotor stamping sheet structures, improving motor starting performance, including
Rotor sheet body is uniformly provided with multiple rotor punching slots on rotor sheet body, and each rotor punching slot includes upper cage slot and lower cage
The distance of slot, lower cage groove center to rotor punching center is small to the distance than upper cage groove center to rotor sheet body center, wherein
Upper cage slot is less than upper cage slot close to the groove width of lower cage slot one end far from the groove width of lower cage slot one end, and then makes the groove profile of cage slot
Special-shaped dovetail groove, rotor kelvin effect when convenient for improving starting；When electric motor starting, rotor frequency is higher, and electric current is due to collecting skin
Effect is squeezed in the conductor in upper cage slot more, and the conductor resistance in upper cage slot is big, and due to the special cage modle kelvin effect of upper cage slot
More serious, conductor resistance is bigger compared with operating normally in upper cage slot, makes to generate larger starting torque when electric motor starting, works normally
When, rotor current frequency is low, and kelvin effect is ignored, and upper and lower cage slot inner conductor is equivalent to resistor coupled in parallel, and impedance is smaller, damage
It consumes smaller.
As the scheme that the utility model advanced optimizes, each rotor punching slot further includes slot neck, and slot neck connects upper cage
Slot and lower cage slot, slot neck are located between cage slot and lower cage slot and for being connected to cage slot and lower cage slot.
As the scheme that the utility model advanced optimizes, upper cage slot includes slot body part and slot shoulder portion, slot body part
Be connected to slot neck, slot shoulder portion and slot body partial width from close to rotor sheet body center to far from rotor sheet body center by
Gradual change is small, and slot shoulder portion and slot body part make cage slot form special-shaped dovetail groove, and the groove profile of upper cage slot is in traditional dovetail groove base
The improved special-shaped dovetail groove of plinth, slot height is close with groove width size, reduces the slot leakage reactance of motor, increases collection skin effect when starting
It answers, equivalent resistance increases, and further increases electric motor starting torque.
As the scheme that the utility model advanced optimizes, the change width rate of slot shoulder portion changes greater than slot body part
Rate.
As the scheme that the utility model advanced optimizes, the width of upper cage slot slot shoulder portion and slot body part joining place is
W1, the height of slot body part is H1, wherein W1≈H1。
As the scheme that the utility model advanced optimizes, slot shoulder is divided into open slot.
As the scheme that the utility model advanced optimizes, the center line of any rotor punching slot with rotor sheet body
Wherein a radius is overlapped.
As the scheme that the utility model advanced optimizes, the groove profile of lower cage slot is common peariform slot, when normal operation,
Upper cage slot and lower cage slot equivalent parallel, equivalent resistance reduce, and reduce motor electrical loss.
As the scheme that the utility model advanced optimizes, which processes suitable for cast aluminium.
The utility model distinguishing feature is: it is trapezoidal that the groove profile of upper cage slot improves formation abnormity on the basis of existing groove profile
Slot, compared to traditional double cage motors, rotor kelvin effect when further improving starting, and rotor slot leakage reactance is reduced,
Make it at the start, there is biggish starting torque and lesser starting current.In real life, it can be applied to electric motor starting
The higher occasion of performance requirement.
The additional aspect and advantage of the utility model will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
Fig. 1 is the utility model overall structure diagram；
Fig. 2 is the area the utility model A partial enlarged view.
Specific embodiment
The embodiments of the present invention are described below in detail, the examples of the embodiments indicate in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar symbol eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and cannot understand the limit to the utility model
System.
It is to be appreciated that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower",
"front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " clockwise ", " counterclockwise ", " axis
To ", " radial direction ", the orientation or positional relationship of the instructions such as " circumferential direction " be to be based on the orientation or positional relationship shown in the drawings, be only for
Convenient for description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have specifically
Orientation is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
A kind of double cage motor rotor stamping sheet structures as shown in Figs. 1-2, including rotor sheet body 1, on rotor sheet body 1
It is even to be equipped with multiple rotor punching slots 2, which is characterized in that each rotor punching slot 2 includes upper cage slot 20 and lower cage slot 21, lower cage slot
The distance at 21 center to 1 center of rotor sheet body is small to the distance than upper 20 center of cage slot to 1 center of rotor sheet body,
In, upper cage slot 20 is less than upper cage slot 20 close to the groove width of lower 21 one end of cage slot far from the groove width of lower 21 one end of cage slot；Electric motor starting
When, rotor frequency is higher, and electric current is since kelvin effect is squeezed in the conductor in upper cage slot 20 more, the conductor resistance in upper cage slot 20
Greatly, and since the special cage modle kelvin effect of upper cage slot 20 is more serious, conductor resistance is bigger compared with operating normally in upper cage slot 20, makes
Generate larger starting torque when electric motor starting, when normal work, rotor current frequency is low, and kelvin effect is ignored, upper and lower cage
Slot 20,21 inner conductors are equivalent to resistor coupled in parallel, and impedance is smaller, are lost smaller.
In some embodiments, each rotor punching slot 2 further includes slot neck 22, and slot neck 22 connects upper cage slot 20 and lower cage
Slot 21, processing easy to produce.
In some embodiments, upper cage slot 20 includes slot body part 200 and slot shoulder portion 201, slot body part 200 and slot
Neck 22 is connected to, and slot shoulder portion 201 and 200 width of slot body part are from close 1 center of rotor sheet body to far from rotor sheet body
1 center gradually becomes smaller, and further improves the starting performance of motor.
Specifically, the change width rate of slot shoulder portion 201 is greater than the change width rate of slot body part 200, improves motor and rise
The skin effect of rotor when dynamic.
In some embodiments, slot shoulder portion 201 and 200 joining place width of slot body part are W1, the height of slot body part 200
Degree is H1, wherein W1≈H1, the skin effect of rotor, reduces rotor slot leakage reactance, further makes when further promoting electric motor starting
The motor is suitable for requiring starting performance relatively high occasion.
In some embodiments, slot shoulder portion 201 is open slot, manufacture easy to process.
In some embodiments, the groove profile of lower cage slot 21 is peariform slot.
Specifically, the center line of any rotor punching slot 2 is overlapped with a wherein radius for rotor sheet body 1, into one
Step increases the uniformity of motor-field distribution, increases the stability of motor during rotation.
Embodiment one
A kind of double-cage rotor lamination structure is as shown in Figs. 1-2, which includes rotor sheet body 1, rotor sheet body 1
Inner circle circumferential direction be equipped with 33 rotor punching slots 2, this 33 rotor punching slots 2 are evenly distributed on punching body 1, it should be understood that
, as needed, the stator punching slot 2 of other quantity, such as 18,24 or 36 etc. can be set.
As shown in Fig. 2, each rotor punching slot 2 includes upper cage slot 20, slot neck 22 and the lower cage slot 21 being successively connected,
In, slot neck 22 connects cage slot 20 and lower cage slot 21 on motor, and the groove profile of lower cage slot 21 is common peariform slot；Upper cage slot 20 includes slot
Body part 200 and slot shoulder portion 201, slot body part 200 are connected to slot neck 22, and slot shoulder portion 201 and 200 width of slot body part are equal
It is gradually become smaller from close to 1 center of rotor sheet body to far from 1 center of rotor sheet body, the change width rate of slot shoulder portion 201 is big
Change width rate in slot body part 200；Slot shoulder portion 201 and 200 joining place width of slot body part are W1, slot body part 200
Height be H1, wherein W1=H1；Slot shoulder portion 201 is open slot,
It is emulated with ANSYS Electronics, simulation result is as shown in Table 1, simulation parameter: stator outer diameter
260mm, diameter of stator bore 180mm, rotor diameter 179.2mm, rotor internal diameter 60mm, motor length 145mm, stacking factor 0.95,
Rotor punching material DW540_50, slot proportion 36/33, driving source 50Hz 220V voltage source；According to table one it is found that motor exists
When starting, rotor kelvin effect when improving starting makes motor have biggish starting torque and lesser starting current.
Table one
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (8)
1. a kind of double cage motor rotor stamping sheet structures, including rotor sheet body (1), it is uniformly provided on rotor sheet body (1) multiple
Rotor punching slot (2), which is characterized in that each rotor punching slot (2) includes upper cage slot (20) and lower cage slot (21), lower cage slot
(21) center to rotor sheet body (1) center distance to than upper cage slot (20) center to rotor sheet body (1) center away from
From small, wherein upper cage slot (20) are less than upper cage slot (20) close to lower cage slot (21) one end far from the groove width of lower cage slot (21) one end
Groove width.
2. motor rotor stamping sheet structure according to claim 1, which is characterized in that each rotor punching slot (2) further includes slot
Neck (22), cage slot (20) and lower cage slot (21) in slot neck (22) connection.
3. motor rotor stamping sheet structure according to claim 2, which is characterized in that upper cage slot (20) include slot body part
(200) it is connected to slot shoulder portion (201), slot body part (200) with slot neck (22), slot shoulder portion (201) and slot body part (200)
Width gradually becomes smaller from close to rotor sheet body (1) center to far from rotor sheet body (1) center.
4. motor rotor stamping sheet structure according to claim 3, which is characterized in that the change width rate of slot shoulder portion (201)
Greater than the change width rate of slot body part (200).
5. motor rotor stamping sheet structure according to claim 3, which is characterized in that slot shoulder portion (201) and slot body part
(200) joining place width is W1, the height of slot body part (200) is H1, wherein W1≈H1。
6. motor rotor stamping sheet structure according to claim 3, which is characterized in that slot shoulder portion (201) is open slot.
7. motor rotor stamping sheet structure according to claim 1, which is characterized in that the groove profile of lower cage slot (21) is peariform slot.
8. motor rotor stamping sheet structure described in -7 any one according to claim 1, which is characterized in that any rotor punching slot
(2) center line is overlapped with a wherein radius for rotor sheet body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920287671.9U CN209730915U (en) | 2019-03-07 | 2019-03-07 | A kind of double cage motor rotor stamping sheet structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920287671.9U CN209730915U (en) | 2019-03-07 | 2019-03-07 | A kind of double cage motor rotor stamping sheet structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209730915U true CN209730915U (en) | 2019-12-03 |
Family
ID=68685406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920287671.9U Expired - Fee Related CN209730915U (en) | 2019-03-07 | 2019-03-07 | A kind of double cage motor rotor stamping sheet structures |
Country Status (1)
| Country | Link |
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| CN (1) | CN209730915U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112311112A (en) * | 2020-09-14 | 2021-02-02 | 珠海格力电器股份有限公司 | Rotor punching sheet, rotor core, motor rotor, motor and compressor |
-
2019
- 2019-03-07 CN CN201920287671.9U patent/CN209730915U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112311112A (en) * | 2020-09-14 | 2021-02-02 | 珠海格力电器股份有限公司 | Rotor punching sheet, rotor core, motor rotor, motor and compressor |
| CN112311112B (en) * | 2020-09-14 | 2021-09-07 | 珠海格力电器股份有限公司 | Rotor punching sheet, rotor core, motor rotor, motor and compressor |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191203 Termination date: 20200307 |
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| CF01 | Termination of patent right due to non-payment of annual fee |