CN106787275A - Frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure - Google Patents
Frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure Download PDFInfo
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- CN106787275A CN106787275A CN201611176448.4A CN201611176448A CN106787275A CN 106787275 A CN106787275 A CN 106787275A CN 201611176448 A CN201611176448 A CN 201611176448A CN 106787275 A CN106787275 A CN 106787275A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 14
- 238000004080 punching Methods 0.000 claims abstract description 19
- 238000004804 winding Methods 0.000 claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 10
- 230000004907 flux Effects 0.000 claims description 10
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000010349 pulsation Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
Abstract
The present invention relates to a kind of frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure, wet type electric motor belongs to threephase asynchronous, it is double-deck short distance Concentrical winding, stator (1) is overrided to form by punching (3), rotor (2) is solid shafting hot jacket collar (4) structure, stator groove profile (5) is semi-closed port parallel teeth dovetail groove, and slot shape of rotor (6) is the closed slot of falling pyriform.Under variable-frequency power sources starting, motor realizes permanent torque smooth start, and noise is low, vibration is small, and motor performance and temperature rise are qualified, and motor reaches use requirement.
Description
Technical field：The present invention relates to a kind of frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure.
Background technology：6000rpm frequency conversion high-speed wet types fire-proof motor is speedily carried out rescue work for colliery to be permeable, is national science and technology support meter
Problem support items are drawn, power is 600kW, voltage 6000V, and vertical machine, the motor is 2 pole motors, and rotating speed 6000rpm becomes
Frequency is started, and the world did not had precedent also at present for the design of the wet type electric motor of 6000rpm, manufacture, reasonable selection stator and rotor groove coordinate and
Groove profile is huge to influence on Harmonic Armature to be coordinated and groove profile, it is necessary to develop stator and rotor groove, therefore reasonable selection stator and rotor groove coordinates
And groove profile can suppress harmonic wave, noise is reduced, improve starting performance, obtain efficiency and power factor higher, to critical speed also
Have an impact, suitable groove profile is easy to water pump to go into the well beneficial to motor diameter size is reduced.
The content of the invention：Coordinate knot it is an object of the invention to provide a kind of frequency conversion high-speed wet type fire-proof motor stator and rotor slot
Structure：Ensure that motor disclosure satisfy that the start request of pump.The technical scheme is that：A kind of frequency conversion high-speed wet type fire-proof motor is determined
Son and rotor slot fit structure, wet type electric motor belongs to threephase asynchronous, is double-deck short distance Concentrical winding, stator (1) by
Punching (3) is overrided to form, and rotor (2) is solid shafting hot jacket collar (4) structure, and stator groove profile (5) is trapezoidal for semi-closed port parallel teeth
Groove, slot shape of rotor (6) is the closed slot of falling pyriform.
Number of stator slots is 24, and rotor slot number is 34, and the air gap flux density of motor is 0.6T or so, and stator (1) is flume structure,
I.e. first groove of punching of stator core groove corresponding with last punching, axis one angle of rotation, stator slot was turned round
One stator tooth away from.
Wet type electric motor is double-deck short distance Concentrical winding, and rule easily, is easy to implement mechanization.General q1 (per pole each
Slot number)=4,6,8 be applied to two-pole machine, q1=4 of the present invention, number of stator slots be 24 grooves be applied to concentric bilayer short distance winding,
Skewed stator slot, an oblique stator tooth is away from rotor slot number should coordinate determination with number of stator slots, and the selection that stator, rotor slot coordinate should
Motor normal starting, torque, rotating speed is set to smooth, without significantly vibration when starting and operating, electromagnetic noise, stray loss are small.
Asynchronous motor is coordinated using few groove, nearly groove, i.e., rotor slot number is close and less than number of stator slots, can reduce slot ripples
The pulsation loss that magnetic flux is produced in core tooth, thus it is advantageous to reducing stray loss and temperature rise ratio.But few groove, nearly groove coordinate
Easily produce electric and magnetic oscillation and noise, it is also possible to produce the synchronizing torque should to consider comprehensively.
Rotor groove coordinates has direct relation with the noise of asynchronous machine, and electromagnetic noise is one of noise source, electromagnetic noise
It is main to be caused by the Reeb vibration of higher hamonic wave, i.e., change with time and space, the power for acting between the stator and the rotor can
To cause electromagnetic noise by stator core vibrating；A radial load is acted at any point of air gap, it is in unit plane
Size in product acts on a radial load with any point of air gap, and its size in unit area is flat with air gap flux density
Side is directly proportional, therefore selects alap air gap flux density necessary for Motor for Reducing Electromagnetic Noise, the air gap of this motor
It is 0.6T or so that magnetic is close.Number of stator slots is Z1, and rotor slot number is Z2, and motor number of pole-pairs is p, to be met for low noise motor：│
Z1, Z2 │ ≠ 0,1,2, │ Z1, Z2 │ ≠ 2p, 2p ± 1,2p ± 2；Also need to make the number of times of most strong stator-rotator magnetic kinetic potential component not
The number of times of air-gap permeance wave component that will be big with some is consistent, │ Z1, Z2 │ ≠ p, │ Z1, Z2 │ ≠ p ± 1, │ Z1, Z2 │ ≠ p ± 2；
This motor tentative programme groove is vibrated from the close distribution of magnetic and starting performance and reducing with being combined into 24/28,24/34
And noise point considers, contrasted by calculating, have selected 24/34.
Many common exchange cast-aluminum rotor motors can use skewed slot, and this motor is because being that rotor bar welding structure should not be oblique
Groove, a stator tooth was turned round away from the effect using skewed slot is by stator slot：Motor internal has the harmonic wave of various frequencies, because of stator
Using distribution short distance winding, so the harmonic magnetic potential amplitude of other frequencies in addition to slot ripples is dramatically weakened.
Because slot ripples winding coefficient is equal to fundamental wave winding coefficient, so tooth harmonic MMF is barely affected.Because phase asynchronous electricity
The stator and rotor fluting of motivation, causes the magnetic resistance in whole air gap circumference range uneven, electromagnetic torque and sensing during motor rotation
Electromotive force accordingly fluctuates.After skewed stator slot, the electromagnetic torque and induced electromotive force of formation are similar to same wire and are uniformly distributed
Average value in one section of circumference range, can effectively weaken the harmonic wave electromotive force produced by harmony wave, thus weaken by
The additional torque that these harmonic fields cause, reduces electric and magnetic oscillation and noise.Although after skewed stator slot also stator can sense
Fundamental wave electromotive force is reduced, but the skew slot angle of selection is that a tooth pitch is much smaller for pole span, thus to motor basic nature
Very little can be influenceed, therefore uses skewed stator slot.
Stator punching groove profile uses semi-closed port parallel teeth dovetail groove, it is possible to reduce pulsating is damaged in surface loss unshakable in one's determination and tooth
Consumption, and reduce effective air gap length, power factor is improved.Rotor can reach the reduction additional damage in surface using closed slot
The effect of consumption, while closed slot is also beneficial to prevent rotor bar from throwing away, beneficial to motor diameter size is reduced, is easy under water pump
Well, common alternating current generator solid shaft rotor groove profile is generally open slot, and this motor for colliery because being speedily carried out rescue work, it is desirable to which diameter is tried one's best
It is small, it is computed, under desired design size, the yoke magnetic of rotor openings groove is close higher, should not use.This motor is because being solid turn
Sub therefore closed slot not easy processing, to solve this problem, using covering collar on solid shafting, collar hot jacket on axle, collar length
It is short to be easy to processing, using wire cutting.
Stator and rotor groove of the invention coordinates：24/34, stator groove profile use semi-closed port parallel teeth dovetail groove, skewed stator slot,
Rotor uses closed slot, and by FEM calculation, under groove cooperation and groove profile, motor can normally rise under variable-frequency power sources
It is dynamic, it is stepped up in full load starting 15s close to 5200rpm, motor full-load run rotor speed is 5959rpm, and motor is realized permanent
Torque starting.There is no the close excessive phenomenon of local magnetic, relatively low electromagnetic noise and vibration during varying frequency starting, and starting performance is good
It is good.
Operation principle of the present invention
The present invention is a kind of frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure, and wet type electric motor belongs to three-phase
Asynchronous motor, is double-deck short distance Concentrical winding, and stator 1 is overrided to form by punching 3, and rotor 2 is the knot of solid shafting hot jacket collar 4
Structure, stator groove profile 5 is semi-closed port parallel teeth dovetail groove, and slot shape of rotor 6 is the closed slot of falling pyriform.
Number of stator slots is 24, and rotor slot number is 34, and the air gap flux density of motor is 0.6T or so, and stator 1 is flume structure, i.e.,
First groove of punching of stator core groove corresponding with last punching, axis rotates an angle, and stator slot was turned round into one
Individual stator tooth away from.
The present invention ensures that motor disclosure satisfy that the start request of pump.Stator coordinates with rotor slot：24/34, stator groove profile is
Semi-closed port parallel teeth dovetail groove, shown in Fig. 3, rotor is the closed slot of falling pyriform, and shown in Fig. 4, stator is skewed slot.Wet type electric motor is double
Layer short distance Concentrical winding, rule easily, is easy to implement mechanization.General q1 (per each slot number of pole)=4,6,8 is applied to two
Pole motor, q1=4 of the present invention, number of stator slots is 24, it is adaptable to concentric bilayer short distance winding, and stator is double-deck same using distribution short distance
Core type winding, so the harmonic magnetic potential amplitude of other frequencies in addition to slot ripples is dramatically weakened.Because tooth is humorous
Wave winding coefficient is equal to fundamental wave winding coefficient, so tooth harmonic MMF is barely affected.Because threephase asynchronous it is fixed,
Rotor is slotted, and causes the magnetic resistance in whole air gap circumference range uneven, electromagnetic torque and induced electromotive force phase during motor rotation
Should fluctuate, after skewed stator slot, the electromagnetic torque and induced electromotive force of formation are similar to same wire and are evenly distributed on one section of circle
Average value in all scopes, can effectively weaken the harmonic wave electromotive force produced by harmony wave, so as to weaken by these harmonic waves
The additional torque that magnetic field causes, reduces electric and magnetic oscillation and noise.Although the fundamental wave that after skewed stator slot also stator can sense is electronic
Gesture is reduced, but the skew slot angle of selection is that a tooth pitch is much smaller for pole span, thus on the influence of motor key property very
It is small, therefore use skewed stator slot.
Stator punching groove profile uses semi-closed port parallel teeth dovetail groove, it is possible to reduce pulsating is damaged in surface loss unshakable in one's determination and tooth
Consumption, and reduce effective air gap length, power factor is improved.Rotor can reach the reduction additional damage in surface using closed slot
The effect of consumption, while closed slot is also beneficial to prevent rotor bar from throwing away, beneficial to motor minification, is easy to water pump to go into the well.It is general
Logical alternating current generator solid shaft rotor groove profile is generally open slot, and this motor for colliery because speedily carrying out rescue work, it is desirable to which diameter is as far as possible small, warp
Calculate, under desired design size, the yoke magnetic of rotor openings groove is close higher, should not use.
Rotor slot number should determine that the selection that stator and rotor groove coordinates should enable motor normal starting, turn with number of stator slots cooperation
Square-rotating speed is smoothed, and without significantly vibration when starting and operating, electromagnetic noise, stray loss are small.
Asynchronous motor is coordinated using few groove, nearly groove, i.e., rotor slot number is close and less than number of stator slots, can reduce slot ripples
The pulsation loss that magnetic flux is produced in core tooth, thus it is advantageous to reducing stray loss and temperature rise ratio.But few groove, nearly groove coordinate
Easily produce electric and magnetic oscillation and noise, it is also possible to produce the synchronizing torque should to consider comprehensively.This motor tentative programme groove is with being combined into
24/28,24/34 but from magnetic it is close distribution and starting performance and reduce vibration and noise point consider, through calculating contrast, selection
24/34.
Groove of the present invention coordinates：24/34, by FEM calculation, under groove cooperation and groove profile, motor is under variable-frequency power sources
Can normal starting, be stepped up in full load starting 15s close to 5200rpm, motor full-load run rotor speed is 5959rpm,
Motor realizes Start-up of constant torque.There is no local magnetic close excessive phenomenon during varying frequency starting, and starting performance is good.
The technique effect of invention：1) when motor frequency conversion is started, designed motor can complete starting process, 2) motor do not have
The local close excessive phenomenon of magnetic.3) air gap flux density 0.615T during no-load running, full load is 0.585T, 4) motor test noise is low,
It is 2.2m/s to vibrate, 5) motor temperature rise is qualified.
Brief description of the drawings：
Fig. 1 frequency conversion high-speed wet type fire-proof motor structure sectional views
Fig. 2 stators, rotor slot matching chart
Fig. 3 stator punching profile of groove
Fig. 4 slot shape of rotor figures
Specific embodiment：
As shown in figure 1, a kind of frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure, wet type electric motor belongs to three
Phase Induction Machines, using double-deck short distance Concentrical winding, as shown in Fig. 2 stator 1 is overrided to form for punching 3, rotor 2 is solid
The structure of axle hot jacket collar 4, stator groove profile 5 is semi-closed port parallel teeth dovetail groove, as shown in figure 3, slot shape of rotor 6 is that pyriform is remained silent
Groove.
Number of stator slots is 24, and rotor slot number is 34, and the air gap flux density of motor is 0.6T or so, as shown in figure 4, stator 1 is
Flume structure, i.e. first groove of punching of stator core groove corresponding with last punching, axis rotate an angle, will be fixed
Pilot trench turned round a stator tooth away from.The groove of motor is with being combined into 24/34, stator punching groove profile as shown in figure 3, stator punching groove profile is
Semi-closed port parallel teeth dovetail groove, the bottom of groove is broader than the top, makes tooth wall substantially parallel, and machine winding is concentric type, non-forming
Coil.Pulsation loss in surface loss unshakable in one's determination and tooth can be reduced using semi-enclosed slot, and reduce effective air gap length, power
Factor is improved.Slot shape of rotor as shown in Figure 4 is closed slot, and its advantage is the added losses for reducing motor, beneficial to motor contracting
Small size, is easy to water pump to go into the well, and common alternating current generator solid shaft rotor groove profile is generally open slot, and this motor is because for colliery
Speedily carry out rescue work, it is desirable to which diameter is as far as possible small, be computed, under desired design size, the yoke magnetic of rotor openings groove is close higher, should not adopt
With while because the rotating speed of motor is high, groove profile of remaining silent is more conducive to prevent copper bar from throwing away.
Rotor slot number should determine that the selection that stator and rotor groove coordinates should enable motor normal starting, turn with number of stator slots cooperation
Square-rotating speed is smoothed, and without significantly vibration when starting and operating, electromagnetic noise, stray loss are small.
Asynchronous motor is coordinated using few groove-nearly groove, i.e., rotor slot number is close and less than number of stator slots, can reduce tooth humorous
The pulsation loss that ripple magnetic flux is produced in iron core teeth, thus it is advantageous to reducing stray loss and temperature rise ratio.But few groove-nearly groove
Coordinate and easily produce electric and magnetic oscillation and noise, it is also possible to produce the synchronizing torque should to consider comprehensively.This motor tentative programme groove is matched somebody with somebody
24/28,24/34 is combined into, but from the close distribution of magnetic and starting performance and reduces vibration and noise point consideration, it is right by calculating
Than have selected 24/34.
24/34 groove coordinates, and produces the groove of adverse consequences to coordinate according to Xi'an Communications University's design of electrical motor and accounts for not
In the range of, and calculated with finite element, motor can realize Start-up of constant torque under variable-frequency power sources, reduce vibration and
Noise, calculates according to grooved size, and motor is without the part close too high phenomenon of magnetic.By verification experimental verification, motor can smooth start,
Noise is low, vibration values are 2.2m/s, and motor performance, motor temperature rise are qualified.
The present invention is a kind of frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure, and groove is fixed with being combined into 24/34
Sub- punching groove profile is semi-closed port parallel teeth dovetail groove, and rotor is the closed slot of falling pyriform, and under variable-frequency power sources starting, motor is realized
Permanent torque smooth start, noise is low, vibration is small, and motor performance and temperature rise are qualified, and motor reaches use requirement.
Claims (2)
1. a kind of frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure, it is characterized in that：Wet type electric motor belongs to three-phase
Asynchronous motor, is double-deck short distance Concentrical winding, and stator (1) is overrided to form by punching (3), and rotor (2) is solid shafting hot jacket
Collar (4) structure, stator groove profile (5) is semi-closed port parallel teeth dovetail groove, and slot shape of rotor (6) is the closed slot of falling pyriform.
2. a kind of frequency conversion high-speed wet type fire-proof motor stator according to claim 1 and rotor slot fit structure, its feature
It is：Number of stator slots is 24, and rotor slot number is 34, and the air gap flux density of motor is 0.6T or so, and stator (1) is flume structure, i.e., fixed
First groove of punching of sub- iron core groove corresponding with last punching, axis rotates an angle, and stator slot was turned round into one
Stator tooth away from.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611176448.4A CN106787275A (en) | 2016-12-19 | 2016-12-19 | Frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure |
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| CN201611176448.4A CN106787275A (en) | 2016-12-19 | 2016-12-19 | Frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994695A (en) * | 2018-01-20 | 2018-05-04 | 营口万意达智能装备科技有限公司 | A kind of servomotor laminated stator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU8956098A (en) * | 1997-10-29 | 1999-05-20 | Fujitsu General Limited | Permanent magnet rotor type electric motor |
| CN201947067U (en) * | 2010-09-23 | 2011-08-24 | 佛山市欧亚玛电器实业有限公司 | Optimum matching structure of stator and rotor on motor |
| KR20130119264A (en) * | 2012-04-23 | 2013-10-31 | 삼성전기주식회사 | Rotor assembly |
| CN203352302U (en) * | 2013-07-01 | 2013-12-18 | 河北省机械科学研究设计院 | Stator and rotor structure of 175-type submersible electric motor for well |
| CN204244045U (en) * | 2014-11-24 | 2015-04-01 | 刘容彰 | With new and effective synchronous motor and the fan of feedback signal |
| CN105634160A (en) * | 2016-01-21 | 2016-06-01 | 江阴市申兴塑料包装有限公司 | In-wheel motor for scooter |
| CN206412846U (en) * | 2016-12-19 | 2017-08-15 | 哈尔滨电气动力装备有限公司 | Frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure |
-
2016
- 2016-12-19 CN CN201611176448.4A patent/CN106787275A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU8956098A (en) * | 1997-10-29 | 1999-05-20 | Fujitsu General Limited | Permanent magnet rotor type electric motor |
| CN201947067U (en) * | 2010-09-23 | 2011-08-24 | 佛山市欧亚玛电器实业有限公司 | Optimum matching structure of stator and rotor on motor |
| KR20130119264A (en) * | 2012-04-23 | 2013-10-31 | 삼성전기주식회사 | Rotor assembly |
| CN203352302U (en) * | 2013-07-01 | 2013-12-18 | 河北省机械科学研究设计院 | Stator and rotor structure of 175-type submersible electric motor for well |
| CN204244045U (en) * | 2014-11-24 | 2015-04-01 | 刘容彰 | With new and effective synchronous motor and the fan of feedback signal |
| CN105634160A (en) * | 2016-01-21 | 2016-06-01 | 江阴市申兴塑料包装有限公司 | In-wheel motor for scooter |
| CN206412846U (en) * | 2016-12-19 | 2017-08-15 | 哈尔滨电气动力装备有限公司 | Frequency conversion high-speed wet type fire-proof motor stator and rotor slot fit structure |
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| Title |
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| 机械工程手册等编: "《电机工程手册》", 30 September 1977, 机械工业出版社 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994695A (en) * | 2018-01-20 | 2018-05-04 | 营口万意达智能装备科技有限公司 | A kind of servomotor laminated stator |
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