CN208479303U - Motor rotor and motor - Google Patents
Motor rotor and motor Download PDFInfo
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- CN208479303U CN208479303U CN201821195854.XU CN201821195854U CN208479303U CN 208479303 U CN208479303 U CN 208479303U CN 201821195854 U CN201821195854 U CN 201821195854U CN 208479303 U CN208479303 U CN 208479303U
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- skewed slot
- iron core
- sine wave
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000004080 punching Methods 0.000 claims description 25
- 229910052782 aluminium Inorganic materials 0.000 claims description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- 239000004411 aluminium Substances 0.000 claims description 12
- 230000005291 magnetic effect Effects 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 11
- 230000005294 ferromagnetic effect Effects 0.000 abstract description 5
- 230000010349 pulsation Effects 0.000 abstract description 4
- 241000555745 Sciuridae Species 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000002829 reductive effect Effects 0.000 description 17
- 239000004020 conductor Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 210000000515 tooth Anatomy 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 230000003313 weakening effect Effects 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 206010000234 Abortion spontaneous Diseases 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 208000015994 miscarriage Diseases 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 208000000995 spontaneous abortion Diseases 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
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Abstract
The utility model provides an electric motor rotor, motor. The motor rotor comprises an iron core and a squirrel cage, wherein a plurality of chutes are formed in the peripheral wall of the iron core and are parallel to each other, an included angle is formed between a connecting line of a starting point and a terminal point of each chute and an axis of the iron core, each chute is a sine wave chute, the sine wave chute extends to the other end from one end of the iron core in a sine wave shape, the squirrel cage is provided with a plurality of guide bars, the shape of each guide bar is matched with the chute, and each guide bar is correspondingly located in each chute. According to the utility model discloses an electric motor rotor, motor can reduce the transverse current of conducting bar, weaken tooth harmonic magnetic field by a wide margin for the additional ferromagnetic loss who produces by transverse current obviously reduces, reduces rotor axial pulsation, has improved the starting performance and the operating efficiency of motor, effectively reduces electromagnetic noise and the pulse noise that shakes, and energy-conserving effect is obvious.
Description
Technical field
The utility model belongs to technical field of motor manufacture, and in particular to a kind of rotor, motor.
Background technique
With the development of modern industry, higher and higher to the running precision of various mechanical equipments, stationarity requirement, these
Most of equipment all carries out driving realization by motor.
Industrial motor is often used threephase asynchronous machine, electromagnetic noise mainly interacted by rotor harmonic field and
It generates at any time with the electromagnetic wave of spatial variations, stator is promoted to generate caused by the vibration of high magnification numbe supply frequency.In order to have
Effect reduces electromagnetic noise above-mentioned, and asynchronous machine mostly uses rotor flume structure, with reduced harmonic magnetic field, to inhibit harmonic wave
Electromagnetic force, but rejection ability is relatively limited.In addition, do not become using the distance between two slot of rotor punching after skewed slot, and cast aluminium is led
The shortest distance between item will be multiplied by the cosine value (value is generally less than 1) of angle of bevel, to make two cast-in aluminum squirrel cage conducting bars
Between distance it is closer, while there are induced potentials for mouse cage conducting bar, to increase the transverse current in iron core, the meeting in rotor core
High-frequency current is induced, will increase load stray loss in the case where skewed slot insulate bad situation, it is longer for medium-and-large-sized or iron core
Motor, traditional skewed slot can cause biggish torsional moment, and so as to cause twisting vibration, it is larger simultaneously that this will lead to motor noise
Influence rotor Mechanical Structure Strength；Furthermore when rotor uses traditional flume structure, the electromagnetism that is generated on stator iron core tooth
Power will have more an axial component, and axial component is the main source of axial force, motor bearings can be made to grind when axial force is larger
Damage aggravation, reduces motor service life, and the axial component of air-gap field causes iron loss to increase.
In addition, cast aluminium conducting bar causes cast aluminium not full often due to die-casting process in the slot of cast-aluminum rotor, generate
Bubble increases the heating loss of conducting bar and the amount of unbalance of cast-aluminum rotor entirety, while cast aluminium conducting bar being made to be easy to produce fracture.
Utility model content
Therefore, the technical problem to be solved by the present invention is to provide a kind of rotors, motor, can be greatly reduced
The transverse current of conducting bar weakens harmony wave, so that the additional ferromagnetic loss generated by transverse current is substantially reduced, reduces and turns
Sub- axial pulse improves the starting performance and operational efficiency of motor, and electromagnetic noise and pulsating noise, energy-saving effect is effectively reduced
Obviously.
To solve the above-mentioned problems, the utility model provides a kind of rotor, including iron core, mouse cage, the iron core
There are multiple skewed slots, multiple skewed slots are parallel to each other, the line of the Origin And Destination of the skewed slot and the iron core on periphery wall
Axis forms angle, and the skewed slot is sine wave skewed slot, and the sine wave skewed slot is with the shape of sine wave by the one of the iron core
End extends to the other end, and the mouse cage has multiple conducting bars, the shape of each conducting bar with its corresponding to the skewed slot phase
Matching, each conducting bar respectively correspond in each skewed slot.
Preferably, the iron core is overrided to form by multiple punchings, and the punching has notch, the notch skew of each punching
At the shape of the sine wave, the sine wave skewed slot is formed.
Preferably, the quantity of the notch of the punching is Z, and the diameter of the punching is D, and the skewed slot has rotor oblique
Slot degree I, I=(1~1.5) π D/Z.
Preferably, the sine wave has offset maximum height bsk, bsk=I/4~I/3.
Preferably, the periphery wall of the iron core is unfolded, and the periphery wall hypothesis after expansion is projected on W plane, it is described
The starting point of skewed slot is defined as O, and the terminal of the skewed slot is defined as B, establishes X-Y coordinate via the O point, wherein the side of X-axis
To parallel with the axis of the iron core, the axial length of the iron core is L, on the conducting bar between any point A point and Y-axis
Distance is x, and the distance between the A point and X-axis are that there are following relationships by y, the x and y:
Preferably, the punching is pyriform slot structure.
Preferably, motor pole number p, the sine wave skewed slot have N number of sinusoidal cycles along the axial direction of the rotor,
N=k*p/2, wherein k is positive integer.
Preferably, the mouse cage uses aluminium die cast.
A kind of motor, including motor stator, rotor are also provided, the rotor is built in the motor stator
In, the rotor is above-mentioned rotor.
A kind of rotor provided by the utility model, motor, since skewed slot is sine wave skewed slot, and the conducting bar is in shape
It is adapted therewith on shape namely the conducting bar is also in the shape extension of sine wave, therefore the magnetic potential on the conducting bar is in the axial direction
In continuous sineization, to improve the magnetic field sine degree of motor spatially, and increase kelvin effect when starting, reinforces
Motor starting performance, when the rotor in the technical solution is assembled into motor, motor is inevitable in the process of running
Since assembly and Structure Designing Problem cause to misplace between motor stator and rotor in the axial direction, to generate certain
Axial force, and then cause pulsating, and use the sine wave skewed slot in the technical solution and structure that sinusoidal waveguide matches
Magnetic potential superposition in the axial direction has (being similar to spring structure) of certain sinusoidal component, when not by external responsive to axial force,
Axial magnetic field is cancelled out each other, and resultant magnetic field zero is made.Once by rotor dislocation generate axial pulsating power, make motor stator,
Rotor generates dislocation, will generate opposite pulsating power, to offset axial pulsating power, reduce axial pulsating amplitude,
Pulsation when motor operation is reduced, pulsating noise when motor operating is effectively reduced；In addition, since the conducting bar is in sine wave
Shape has multiple sinusoidal cycles in a rotor core length, since tilt angle is complete between every 1/4 sinusoidal cycles
On the contrary, tilt length is consistent, so as to which the axial magnetic field generated in the conducting bar is cancelled out each other, to avoid being drawn by skewed slot
The axis magnetic field risen is uneven, and the transverse current of conducting bar can be greatly reduced, weaken harmony wave, so that by lateral electricity
The raw additional ferromagnetic loss of miscarriage is substantially reduced, and electromagnetic noise is effectively reduced, energy-saving effect is obvious.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the rotor of the utility model embodiment；
Fig. 2 is the schematic perspective view of the iron core in Fig. 1；
Fig. 3 is the structural schematic diagram of the punching in Fig. 2；
Fig. 4 be Fig. 1 in outer diameter wall the face W projection partial schematic diagram.
Appended drawing reference indicates are as follows:
1, iron core；11, punching；12, notch；13, rotor tooth；2, mouse cage；21, conducting bar；22, end ring；3, skewed slot.
Specific embodiment
In conjunction with referring to shown in Fig. 1 to 4, embodiment according to the present utility model provides a kind of rotor, including iron core 1,
Mouse cage 2 has multiple skewed slots 3 on the periphery wall of the iron core 1, and multiple skewed slots 3 are parallel to each other, the starting point of the skewed slot 3 and end
The line of point and the axis of the iron core 1 form angle, and the skewed slot 3 is sine wave skewed slot, and the sine wave skewed slot is with sine
The shape of wave extends to the other end by one end of the iron core 1, and the mouse cage 2 has multiple conducting bars 21, each conducting bar 21
Shape with its corresponding to the skewed slot 3 match, each conducting bar 21 respectively corresponds in each skewed slot 3.The skill
In art scheme, since the skewed slot is sine wave skewed slot, and the conducting bar 21 is adapted therewith in shape namely the conducting bar
21 also extend in the shape of sine wave, therefore the magnetic potential on the conducting bar 21 is also in the axial direction continuous sineization, to improve
The magnetic field sine degree of motor spatially, and increase kelvin effect when starting, reinforce motor starting performance, as the technical side
When rotor in case is assembled into motor, motor is in the process of running inevitably since assembly and Structure Designing Problem are led
Cause misplaces between motor stator and rotor in the axial direction, to generate certain axial force, and then causes pulsating, and
Using the magnetic potential superposition of sine wave skewed slot and the structure that matches of sinusoidal waveguide in the axial direction in the technical solution, have certain
Sinusoidal component (be similar to spring structure), when not by external responsive to axial force, axial magnetic field is cancelled out each other, and makes to synthesize magnetic
Field is zero.Once the axial pulsating power generated by rotor dislocation makes motor stator, rotor generate dislocation, will generate
Opposite pulsating power reduces axial pulsating amplitude to offset axial pulsating power, reduces pulsation when motor operation, effectively
Reduce pulsating noise when motor operating；In addition, since the conducting bar 21 is in sinusoidal waveform, in a rotor core length
With multiple sinusoidal cycles, since tilt angle is completely on the contrary, tilt length is consistent between every 1/4 sinusoidal cycles, so as to
It is enough that the axial magnetic field generated in the conducting bar 21 is cancelled out each other, to avoid the axis magnetic field as caused by skewed slot uneven
It is even, the transverse current of conducting bar can be greatly reduced, weaken harmony wave, so that being lost by the additional ferromagnetic that transverse current generates
It is substantially reduced, electromagnetic noise is effectively reduced, energy-saving effect is obvious.
As a kind of specific embodiment of the sine wave skewed slot, to make to illustrate relative simplicity, as shown in figure 4, by institute
The periphery wall expansion of iron core 1 is stated, and the periphery wall hypothesis after expansion is projected on W plane, the starting point of the skewed slot is defined as O,
The terminal of the skewed slot is defined as B, establishes X-Y coordinate via the O point, wherein the axis in the direction of X-axis and the iron core 1
In parallel, the axial length of the iron core 1 is L, on the conducting bar 21 of the sine wave between any point A point and Y-axis away from
From for x (although it is understood that be the specific restriction to conducting bar 21 in shape herein, be applied equally to it is described just
The shape of string wave skewed slot), the distance between the A point and X-axis are that there are following relationships by y, the x and y:
I is rotor chute degree in formula (1), and bsk is the offset maximum height of sine wave.
Magnetic potential of the x at any point is positively correlated with the y at this, and y is in certain sineization with x variation, therefore
Magnetic potential on the conducting bar 21 is in the axial direction also in continuous sineization, so that the magnetic field sine degree of motor is further increased, and
Kelvin effect when starting is further increased, starting performance is further enhanced.
Due to the effect of sinusoidal mouse cage conducting bar 21, any point A point on the iron core 1 is by same root mouse cage conducting bar
The influence of electric potential of 21 multiple directions, synthesis potential are weakened instead, and weakening amplitude is related to bsk, bigger, the synthesis of bsk design
Electromotive force is weaker, and transverse current is lower, then the motor for being p for number of poles, and the calculation formula for weakening coefficient j is as follows:
But due to the skewed slot 3 have phase difference, make to generate transverse current in the conducting bar 21, and this transverse current with
The increase of rotor chute degree I and increase, the calculation formula of increase range coefficient h is as follows:
Therefore the calculation formula that synthesis weakens coefficient ja is as follows:
Substantially weaken transverse current to be enabled, it is preferable that make rotor chute degree I=(1~1.5) π D/Z, wherein Z is punching
The quantity of 11 notch 12, D are the diameter of the punching 11, and the skewed slot 3 has rotor chute degree I, further, described
Offset maximum height bsk=I/4~I/3 of sine wave can guarantee ja < 0.1 at this time hereinafter, leading to substantially eliminate motor
Harmonic wave potential in item 21 between conducting bar 21, while avoiding generating higher leakage reactance.
In skewed rotor, position of each segment of same root cast aluminium conductor in magnetic field is different, so and straight trough
When compare, the induction electric in conductor will definitely be weakened.Conductor in skewed slot is seen as unlimited more short and small straight conductors
Series connection, have a small phase difference between every two adjacent straight conductors, thus reduced harmonic induction electric on the whole
Gesture, thus reduced harmonic magnetic field.Weakening amplitude indicates with skew factor k, then the higher hamonic wave for v times, skew factor k formula
It is as follows:
Simultaneously because the sinusoidal oblique slot type structure used, compares skewed rotor, between the short straight conductor of each adjacent two
There are sinusoidal components for electromotive force, can further strengthen skewed slot and filter out inhibiting effect for higher hamonic wave.After considering sine
The formula for synthesizing skew factor ka is as follows:
Simultaneously because sinusoidal skewed slot for fundamental wave inhibitory effect due to front and back Wave crest and wave trough superposition and cancel out each other, therefore
For fundamental wave unrestraint effect.Offset maximum height bsk=I/4~I/3 of the sine wave, can make ka < 0.1, experience
Card, the amplitude of harmonic wave potential can reduce by 90%, and noise can reduce 5~8dB.
Certainly, while guaranteeing two coefficients of ja and ka all 0.1 hereinafter, can more greatly eliminate in conductor bars for dynamoelectric machines 21
Harmonic wave potential between conducting bar 21, while avoiding generating higher leakage reactance.
The sine wave skewed slot can be realized using various ways, it is preferable that the iron core 1 is laminated by multiple punchings 11
It forms, the punching 11 has multiple rotor tooths 13, periphery wall week of the rotor tooth 13 of adjacent two in the punching 11
It is upwardly formed notch 12,12 skew of notch of each punching 11 forms the sine wave skewed slot at the shape of the sine wave, by
In by forming the sine wave skewed slot to 12 skew of notch of each punching 11, without to existing punching 11 carry out it is special plus
Work improves work efficiency, and further, the punching 11 is pyriform slot structure, using pyriform slot structure, punching difficulty
Low, simple process is more applicable for producing in batches.
Preferably, motor pole number p, the sine wave skewed slot have N number of sinusoidal cycles along the axial direction of the rotor,
N=k*p/2, wherein k is the integral multiple that the number of positive integer namely the sinusoidal cycles is motor number of pole-pairs (p/2), makes motor
Air-gap field be more intended to sinusoidalization upwards in motor shaft, this can further inhibit motor-field noise.
Preferably, the mouse cage 2 uses aluminium die cast.More specifically, the mouse cage 2 includes end ring 22 and multiple described
Conducting bar 21, multiple conducting bars 21 are disposed in an evenly spaced relation between two end ring 22 along the circumferencial direction of the end ring 22.It adopts
The mouse cage 2 is formed with the mode of aluminium die cast, during die casting aluminium, since the sine wave skewed slot has
Multiple wave crests and trough, molten aluminum concentrates delay at the wave crest and/or trough of sine wave skewed slot, to increase aluminium in press casting procedure
The bubble of liquid is discharged the pressure of liquid, avoids generating cavity, improves cast aluminium quality, this can favorably be avoided in the prior art
Using the mouse cage conducting bar in straight trough or traditional skewed slot since there are phenomenon of ruptures caused by bubble in casting process, institute is improved
State the structural strength of mouse cage 2.
Embodiment according to the present utility model also provides a kind of motor, including motor stator, rotor, the motor
Rotor is built in the motor stator, and the rotor is above-mentioned rotor, is turned due to using above-mentioned motor
Son can be greatly reduced the transverse current of conducting bar, weaken harmony wave, so that being lost by the additional ferromagnetic that transverse current generates
It is substantially reduced, reduces rotor axial pulsation, improve the starting performance and operational efficiency of motor, electromagnetic noise and arteries and veins is effectively reduced
Shake noise, and energy-saving effect is obvious.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting
Ground combination, superposition.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all practical at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the guarantor of the utility model within novel spirit and principle
Within the scope of shield.Above are merely preferred embodiments of the utility model, it is noted that for the ordinary skill of the art
For personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these improvement
It also should be regarded as the protection scope of the utility model with modification.
Claims (9)
1. a kind of rotor, which is characterized in that have including iron core (1), mouse cage (2), on the periphery wall of the iron core (1) more
A skewed slot (3), multiple skewed slots (3) are parallel to each other, the line of the Origin And Destination of the skewed slot (3) and the axis of the iron core (1)
Line forms angle, and the skewed slot (3) is sine wave skewed slot, and the sine wave skewed slot is with the shape of sine wave by the iron core (1)
One end extend to the other end, the mouse cage (2) has multiple conducting bars (21), the shape of each conducting bar (21) and its it is right
The skewed slot (3) answered matches, and each conducting bar (21) respectively corresponds in each skewed slot (3).
2. rotor according to claim 1, which is characterized in that the iron core (1) laminated by multiple punchings (11) and
At the punching (11) has notch (12), and notch (12) skew of each punching (11) is formed at the shape of the sine wave
The sine wave skewed slot.
3. rotor according to claim 2, which is characterized in that the quantity of the notch (12) of the punching (11) is Z
A, the diameter of the punching (11) is D, and the skewed slot (3) has rotor chute degree I, I=(1~1.5) π D/Z.
4. rotor according to claim 3, which is characterized in that the sine wave has offset maximum height bsk,
Bsk=I/4~I/3.
5. rotor according to claim 4, which is characterized in that the periphery wall of the iron core (1) is unfolded, and is unfolded
Periphery wall hypothesis afterwards is projected on W plane, and the starting point of the skewed slot is defined as O, and the terminal of the skewed slot is defined as B, via
The O point establishes X-Y coordinate, and wherein the direction of X-axis is parallel with the axis of the iron core (1), and the axial direction of the iron core (1) is long
Degree is L, and the distance between any point A point and Y-axis are x on the conducting bar (21), and the distance between the A point and X-axis are y,
There are following relationships with y by the x:
6. rotor according to claim 2, which is characterized in that the punching (11) is pyriform slot structure.
7. rotor according to claim 1, which is characterized in that motor pole number p, the sine wave skewed slot is described in
The axial direction of rotor has N number of sinusoidal cycles, and N=k*p/2, wherein k is positive integer.
8. rotor according to claim 1, which is characterized in that the mouse cage (2) uses aluminium die cast.
9. a kind of motor, including motor stator, rotor, the rotor are built in the motor stator, feature
It is, the rotor is rotor described in any item of the claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821195854.XU CN208479303U (en) | 2018-07-26 | 2018-07-26 | Motor rotor and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821195854.XU CN208479303U (en) | 2018-07-26 | 2018-07-26 | Motor rotor and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208479303U true CN208479303U (en) | 2019-02-05 |
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ID=65207980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821195854.XU Active CN208479303U (en) | 2018-07-26 | 2018-07-26 | Motor rotor and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208479303U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880026A (en) * | 2018-07-26 | 2018-11-23 | 珠海格力电器股份有限公司 | Motor rotor and motor |
| CN110994825A (en) * | 2019-12-09 | 2020-04-10 | 珠海格力电器股份有限公司 | Motor rotor and manufacturing method thereof, reluctance motor and electric automobile |
-
2018
- 2018-07-26 CN CN201821195854.XU patent/CN208479303U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880026A (en) * | 2018-07-26 | 2018-11-23 | 珠海格力电器股份有限公司 | Motor rotor and motor |
| CN110994825A (en) * | 2019-12-09 | 2020-04-10 | 珠海格力电器股份有限公司 | Motor rotor and manufacturing method thereof, reluctance motor and electric automobile |
| CN110994825B (en) * | 2019-12-09 | 2021-05-07 | 珠海格力电器股份有限公司 | Motor rotor and manufacturing method thereof, reluctance motor and electric automobile |
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