CN108054891A - A kind of common vertical frequency-changing three-phase asynchronous motor - Google Patents
A kind of common vertical frequency-changing three-phase asynchronous motor Download PDFInfo
- Publication number
- CN108054891A CN108054891A CN201711373171.9A CN201711373171A CN108054891A CN 108054891 A CN108054891 A CN 108054891A CN 201711373171 A CN201711373171 A CN 201711373171A CN 108054891 A CN108054891 A CN 108054891A
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- Prior art keywords
- bearing
- changing
- phase asynchronous
- common vertical
- asynchronous motor
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- 238000001816 cooling Methods 0.000 claims abstract description 40
- 238000005096 rolling process Methods 0.000 claims abstract description 9
- 238000004804 winding Methods 0.000 claims abstract description 7
- 230000002787 reinforcement Effects 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 27
- 239000010959 steel Substances 0.000 claims description 27
- 238000009434 installation Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 238000004080 punching Methods 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 239000004411 aluminium Substances 0.000 claims 1
- 235000019628 coolness Nutrition 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 238000005728 strengthening Methods 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/12—Asynchronous induction motors for multi-phase current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
- H02K9/12—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing wherein the cooling medium circulates freely within the casing
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The present invention provides a kind of common vertical frequency-changing three-phase asynchronous motor, including stator, rotor, bearing, bearing (ball) cover, cooling system；Stator includes out frame and has winding stator core, the supporting rib that out frame includes machine base outer shell, ring flange is connected with reinforcement machine base outer shell with ring flange；The internal fan positioned at motor non-shaft stretching end is fixed on rotor shaft；The bearing (ball) cover is fixed on out frame, and the rolling bearing of support shaft is equipped on bearing (ball) cover；Cooling system include respectively the cooler positioned at out frame both sides, positioned at engine base above for connecting the wind turbine of the ventilating ducts of two coolers, the external fan in ventilating duct and driving external fan, upper part of the frame has supporting rack, supporting rack includes superposed support plate, support plate is located above ventilating duct, and assembling is on the supporting plate.Structural electromotor of the present invention can meet frequency conversion requirement, have many advantages, such as that cooling condition is good, compact-sized, manufacture is at low cost, easy to maintain.
Description
Technical field
The invention belongs to the technical fields of high pressure vertical threephase asynchronous, and in particular to a kind of common vertical frequency conversion three
Phase asynchronous motor.
Background technology
The vertical threephase asynchronous of ordinary high pressure, for driving various pump equipments, mechanical industry, steel work in ore deposit
It is used in the industrial and mining enterprises such as industry, petrochemical industry, power plant as prime mover, the huge market demand.With LNG（Liquefaction is natural
Gas）Production domesticization project is carried out implementing at home, and more new requirements are proposed to high pressure vertical threephase asynchronous, are such as required
Vertical machine can bear thrust, disclosure satisfy that frequency conversion requirement etc..
In the prior art, ordinary high pressure vertical machine is to design to open on the basis of the high-voltage three-phase asynchronous motor of bedroom
The product of hair, for structure using case structure popular in the world, outer ventilation circuit cooler is located at the both sides of engine base, motor inside band
There is internal fan, inside and outside two wind path structures are formed with engine base both sides cooler, motor has preferable under the conditions of power frequency operation
Cooling effect.
But with the raising that social progress, people's energy-saving and environmental protection are realized, the variable-frequency motor that industrial enterprise use is got over
Come more, but often motor volume is larger for existing vertical variable-frequency motor, and in motor when low speed is run, motor internal heat dissipating
Bad, motor temperature rise is higher so that the use of vertical variable-frequency motor is restricted significantly, and therefore, being badly in need of design one kind can expire
The vertical variable-frequency motor of sufficient user's requirement.
The content of the invention
It is 4P it is an object of the invention to provide a kind of number of poles, the punching of power 1120kW, variable frequency range 5-60Hz, stator
Piece outer diameter is the high pressure vertical frequency-changing three-phase asynchronous motor of Φ 950mm, cannot be met to solve existing 4 pole vertical type motor
The problem of frequency conversion requirement, structural electromotor of the present invention have that cooling condition is good, compact-sized, manufacture is at low cost, easy to maintain etc. excellent
Point.
The present invention adopts the following technical scheme that：A kind of common vertical frequency-changing three-phase asynchronous motor, which is characterized in that including
Stator, rotor, bearing, bearing (ball) cover, cooling system；The stator includes out frame, has winding stator core and determine
Sub- temperature element, the branch that the out frame includes machine base outer shell, ring flange is connected with the reinforcement machine base outer shell with ring flange
Support muscle；The rotor includes shaft, cast-aluminum rotor iron core, and the internal fan positioned at motor non-shaft stretching end is fixed in shaft；It is described
Bearing (ball) cover is fixed on out frame, and the rolling bearing of support shaft is equipped on bearing (ball) cover；The cooling system includes
It is located at the hollow cooler device of the engine base both sides respectively, is filled above the engine base for connecting two hollow coolers
The ventilating duct put, the external fan set in the ventilating duct and the wind turbine for driving external fan, the hollow cooler dress
There is cooling tube, the cooling tube is parallel to the more arrangeds of axial direction of the shaft, the upper part of the frame setting in putting
There is supporting rack, support frame as described above includes the support plate positioned at supporting rack top, and the support plate is located at the top of ventilating duct, described
On the supporting plate, the wind turbine is located at the surface of external fan to assembling.
The axial direction of two hollow cooler devices along shaft is symmetrical or almost symmetry is set.
The external fan and wind turbine are arranged at the middle position of cooling system.
The internal fan is centrifugal internal fan.
The non-shaft stretching end rolling bearing model 7222BCBM, the axle stretch end rolling bearing model 6232.
The non-shaft stretching end bearing mounting means of the motor is installed for DT.
The base inner is provided with to strengthen the steel pipe of engine base intensity, and the steel pipe is penetrated through along the axial direction of shaft
Entire engine base, the steel pipe are arranged circumferentially along the engine base.
The bearing (ball) cover is steel plate end cap, is provided with reinforcing rib in steel plate end cap, the reinforcing rib is in steel plate end cap
It is evenly arranged.
The number of poles of the motor is 4P, power 1120kW, variable frequency range 5-60Hz, and stator punching outer diameter is φ
950mm。
The internal fan outer diameter is φ 720mm.
Beneficial effects of the present invention are as follows：Hollow cooler device, the company of being provided with above engine base are installed in engine base both sides
The ventilating duct, external fan, wind turbine of two hollow cooler devices are connect, the cooling capacity of outer ventilation circuit is strengthened, external fan can be stirred
Dynamic air quantity is fully entered in cooling tube, and air quantity is big, good cooling results, and assembling is easy to maintain.In internal fan for electric machine and
Under the collective effect of external fan, wind path Xun Huan is formed inside and outside motor, effective radiating and cooling is carried out to motor inside, enhancing is cold
But effect makes motor internal temperature rise excessively high, so as to ensure the stability of motor work.Present invention design disclosure satisfy that motor
The cooling requirement of different running frequencies.
The axial direction of two hollow cooler devices along shaft is symmetrical or almost symmetry is set, the external fan and wind turbine
The middle position of ventilating duct is arranged at, makes electric motor structure of the present invention compact, effectively reduces the volume of motor, and make electronic
Machine both sides wind path is symmetrical arranged, and is effectively ensured and uniform synchronous cooling is carried out to motor interior, prevent that motor interior is local
Temperature raises.Internal fan is centrifugal internal fan, and wind is made to be efficiently entering in the cooler of engine base both sides, so as to be turned by external fan
The cold wind of dynamic sucking cools down motor interior, increases air quantity.Steel pipe avoids motor oscillating for strengthening engine base intensity.
Reinforcing rib is provided in steel plate end cap, when operating motor, bearing with end cover is not easy to vibrate.Rolling bearing model 7222BCBM
（Non-shaft stretching end） +6232（Axle stretch end）, non-shaft stretching end bearing mounting means is DT installations, can meet motor using DT installations
Special rotating speed requirement（30~1800r/min）And loading demands（Vertical motor rotor radial load）.Internal fan outer diameter is φ
720mm, internal fan can enhance the cooling wind Xun Huan inside motor using larger outer diameter, enhance the agitation of wind, so as to effectively
Cool down to motor inside.
Description of the drawings
It in order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, the accompanying drawings in the following description is only the embodiment of the present invention, common for this field
For technical staff, without having to pay creative labor, other attached drawings are can also be obtained according to these attached drawings.
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the sectional view of the present invention.
Specific embodiment
In order to make the technical purpose of the present invention, technical solution and advantageous effect clearer, below in conjunction with the accompanying drawings and specifically
Embodiment is further illustrated technical scheme.
As depicted in figs. 1 and 2, the common vertical frequency-changing three-phase asynchronous motor of the present invention, including stator 1, rotor 2, bearing
3rd, bearing (ball) cover 4, cooling system 5.
The stator 1 includes out frame 11, stator core 12, winding coil 13 and stator temperature element（Do not show in figure
Go out）, stator core 12 includes stator punching, and stator temperature element draws from the ventilating duct of stator core 12, and it is fixed to avoid
Sub- temperature element and winding coil 13 are in end contact discharge；Stator core 12, winding coil 13 and stator temperature element are whole
Using VPI vacuum high-pressure power dipping lacquers, after whole dipping lacquer, there is winding each several part one integrated mass, the electromagnet pull of bigger can be born
With overvoltage impact force.
Wherein, the out frame 11 includes machine base outer shell 14, and ring flange 15, method are provided at the axle stretch end 31 of motor
Blue disk 15 is fixed on engine base 11, is additionally provided with the supporting rib 16 for strengthening the machine base outer shell 14 and the connection of engine base ring flange 15,
Supporting rib 16 makes the connection of machine base outer shell 14 and engine base ring flange 15 more secured.
The rotor 2 includes shaft 21, cast-aluminum rotor iron core 22, and internal fan 23, the internal fan are fixed in shaft 21
23 be centrifugal internal fan.In the present embodiment, the outer diameter of the internal fan 23 is φ 720mm, however, the present invention is not limited thereto, interior wind
The outer diameter size of fan 23 is limited by motor inner space, and internal fan 23 of the present invention can be enhanced inside motor using larger outer diameter
Cooling wind cycle, so as to effectively cooling down to motor inside.
Bearing (ball) cover 4 includes upper end cover 41 and bottom end cover 42, and bearing 3 includes upper bearing (metal) 33 and lower bearing 34, engine base 11
Top is fixed with upper end cover 41, and upper bearing (metal) 33 is equipped on upper end cover 41；The lower part of the engine base 11 is fixed with bottom end cover 42, under
Lower bearing 34 is installed on end cap 42.
The bearing 3 is rolling bearing, without thrust.In the present embodiment, the bearing designation that bearing 3 is selected is 7222BCBM
（Non-shaft stretching end）+6232（Axle stretch end）, wherein, the 32 bearing mounting means of non-shaft stretching end is by traditional back-to-back installation（BD
Installation）Be installed in series (DT installations) is changed to, the special rotating speed requirement of motor can be met using DT installations（30~1800r/min）
And loading demands（Vertical motor rotor radial load）, and traditional BD installations are only capable of meeting loading demands, it is impossible to meet rotating speed
It is required that.
The bearing (ball) cover 4 is steel plate end cap, and steel plate end cap can play the role of strengthening intensity, prevent motor oscillating, steel
Reinforcing rib 43 is provided in plate end cap 4, the reinforcing rib 43 is evenly arranged in steel plate end cap 4, and reinforcing rib 43 can strengthen steel
The intensity of plate end cap 4.In the present embodiment, the thickness of the steel plate end cap 4 is 50mm, and the reinforcing rib 43 has the six roots of sensation.This implementation
Example steel plate end cap is compared with the cast iron end cap of conventional 30mm, and when motor operates, bearing with end cover is not easy to vibrate, and ensure that motor works
Stability.
The cooling system 5 includes being separately mounted to the hollow cooler device 51 of 11 both sides of out frame and be located at
11 top of engine base has for connecting the ventilating duct 52 of two hollow cooler devices 51 in the hollow cooler device 51
There is cooling tube（It is not shown in figure）, the cooling tube is parallel to the more arrangeds of axial direction of the shaft 21, the wind-guiding
External fan 53 is provided in cylinder 52,11 top of engine base is provided with supporting rack 17, and support frame as described above 17 includes being located at supporting rack
The support plate 18 on 17 tops, the support plate 18 are located at the top of ventilating duct 52, driving external fan are equipped in institute's support plate 18
53 wind turbine 54, the wind turbine 54 are located at the surface of external fan 53.
Supporting rack 17, support plate 18, wind turbine 54, the Position Design of external fan 53 enable external wind path significantly more efficient
While cooling to motor inside, moreover it is possible to which the effective size for reducing motor makes electric machine structure compact.
The axial direction of two hollow cooler devices 51 along shaft 21 is symmetrical or almost symmetry is set.
The external fan 53 and wind turbine 54 are arranged at the middle position of ventilating duct 52.
Internal fan 23 is located at non-shaft stretching end, and the hot wind of interior wind path is divulged information from non-shaft stretching end to iron core position by rotor
Road is had respectively entered in the cooler of both sides, and outer ventilation circuit forces wind turbine 54 and external fan 53 that cold wind is sucked two from non-shaft stretching end 32
The cooler 51 of side is taken away the hot wind of base inner by the cooling tube of both sides, and inner and outer air paths form fair current, preferably reduce
Motor temperature rise.
The setting of external fan 53 and wind turbine 54 can strengthen the cooling capacity of outer ventilation circuit, the air quantity that can stir external fan 53
It fully enters in cooling tube, air quantity is big, good cooling results, can enhance the effect to motor cooling, cooling, and the installation dimension of wind turbine 54
Shield is convenient.
Preferably, the engine base 11 is internally provided with to strengthen the rib of engine base intensity, and rib can avoid electricity
Machine vibration.In the present embodiment, rib is steel pipe 19, and the steel pipe 19 penetrates through entire engine base 11 along the axial direction of shaft 21,
Being arranged circumferentially along the engine base 11 of steel pipe 19, the size of steel pipe 19 is φ 60mm, and there are four the steel pipes 19.But
The invention is not limited thereto, unrestricted for strengthening the form of the rib of engine base intensity, size, quantity.
Common vertical frequency-changing three-phase asynchronous motor according to the present invention, compact-sized, small volume solves tradition
The vertical bulky problem of variable-frequency motor.
Common vertical frequency-changing three-phase asynchronous motor according to the present invention, the number of poles of motor is 4P, and power is
1120kW, variable frequency range 5-60Hz, stator punching outer diameter are φ 950mm, are supplied using frequency converter during electric motor operation of the present invention
Electricity, when frequency is relatively low（During such as less than 30Hz）, motor speed is relatively low, and motor internal temperature rise is relatively high, in 23 He of internal fan
Under being acted on while external fan 53, wind path Xun Huan is generated inside and outside motor, radiating and cooling is carried out to motor inside, is made inside motor
Temperature rises will not be excessively high.And cooling effect is preferable under being acted on while internal fan 23 and external fan 53.When frequency is more than 30Hz,
Motor speed is very fast, under acting on while internal fan 23 and external fan 53, can ensure effectively to cool down motor inside,
So as to ensure the stability of motor work, therefore, present invention design disclosure satisfy that the cooling requirement of motor difference running frequency.
It should be noted last that：Technical scheme that the above embodiments are only illustrative and not limiting is any right
The equivalent substitution and do not depart from the modification of spirit and scope of the invention or local replacement that the present invention carries out, should all cover in this hair
Within bright protective scope of the claims.
Claims (10)
1. a kind of common vertical frequency-changing three-phase asynchronous motor, which is characterized in that including stator, rotor, bearing, bearing (ball) cover,
Cooling system；The stator includes out frame, has winding stator core and stator temperature element, the out frame bag
Include machine base outer shell, the supporting rib that ring flange is connected with the reinforcement machine base outer shell with ring flange；The rotor includes shaft, cast aluminium
Rotor core is fixed with the internal fan positioned at motor non-shaft stretching end in shaft；The bearing (ball) cover is fixed on out frame, axis
Socket end covers the rolling bearing for being equipped with support shaft；The cooling system includes the sky for being located at the out frame both sides respectively
Empty cooling arrangement is used for the ventilating duct of two hollow cooler devices of connection, in the ventilating duct above the engine base
The external fan of interior setting and the wind turbine for driving external fan, the hollow cooler device is interior to have cooling tube, the cooling
Pipe is parallel to the more arrangeds of axial direction of the shaft, and the upper part of the frame is provided with supporting rack, and support frame as described above includes
Support plate positioned at supporting rack top, the support plate are located at the top of ventilating duct, and the assembling is on the supporting plate, described
Wind turbine is located at the surface of external fan.
A kind of 2. common vertical frequency-changing three-phase asynchronous motor according to claim 1, which is characterized in that two air to air coolings
But the axial direction of device device along shaft is symmetrical or almost symmetry is set.
A kind of 3. common vertical frequency-changing three-phase asynchronous motor according to claim 2, which is characterized in that the external fan
The middle position of cooling system is arranged at wind turbine.
A kind of 4. common vertical frequency-changing three-phase asynchronous motor according to claim 3, which is characterized in that the internal fan
For centrifugal internal fan.
5. a kind of common vertical frequency-changing three-phase asynchronous motor according to claim 4, which is characterized in that the non-axis is stretched
Hold rolling bearing model 7222BCBM, the axle stretch end rolling bearing model 6232.
A kind of 6. common vertical frequency-changing three-phase asynchronous motor according to claim 5, which is characterized in that the motor
Non-shaft stretching end bearing mounting means be DT installation.
7. a kind of common vertical frequency-changing three-phase asynchronous motor according to claim 6, which is characterized in that in the engine base
Portion is provided with to strengthen the steel pipe of engine base intensity, and the steel pipe penetrates through entire engine base, the steel pipe along the axial direction of shaft
Along being arranged circumferentially for the engine base.
A kind of 8. common vertical frequency-changing three-phase asynchronous motor according to claim 7, which is characterized in that the bearing end
It covers as steel plate end cap, is provided with reinforcing rib in steel plate end cap, the reinforcing rib is evenly arranged in steel plate end cap.
9. according to a kind of common vertical frequency-changing three-phase asynchronous motor of claim 1 to 8 any one of them, which is characterized in that
The number of poles of the motor is 4P, power 1120kW, variable frequency range 5-60Hz, and stator punching outer diameter is φ 950mm.
A kind of 10. common vertical frequency-changing three-phase asynchronous motor according to claim 9, which is characterized in that the interior wind
Fan outer diameter is φ 720mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711373171.9A CN108054891A (en) | 2017-12-19 | 2017-12-19 | A kind of common vertical frequency-changing three-phase asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711373171.9A CN108054891A (en) | 2017-12-19 | 2017-12-19 | A kind of common vertical frequency-changing three-phase asynchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108054891A true CN108054891A (en) | 2018-05-18 |
Family
ID=62133817
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711373171.9A Pending CN108054891A (en) | 2017-12-19 | 2017-12-19 | A kind of common vertical frequency-changing three-phase asynchronous motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378923A (en) * | 2018-11-28 | 2019-02-22 | 武汉奥特彼电机有限公司 | Flange base integration Induction Motor Structure and operation method |
| CN109639038A (en) * | 2018-12-20 | 2019-04-16 | 卧龙电气南阳防爆集团股份有限公司 | A kind of high-speed high capacity threephase asynchronous |
| CN112510919A (en) * | 2020-11-23 | 2021-03-16 | 华能国际电力股份有限公司井冈山电厂 | Cooling device of fan type load motor of thermal power plant |
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| JP2016052169A (en) * | 2014-08-29 | 2016-04-11 | 東芝三菱電機産業システム株式会社 | Vertical rotary electric machine and vibration prevention method |
| CN206302223U (en) * | 2016-12-16 | 2017-07-04 | 卧龙电气集团股份有限公司 | A kind of explosion-proof frequency conversion speed-regulating three-phase asynchronous motor |
| CN207638525U (en) * | 2017-12-19 | 2018-07-20 | 卧龙电气集团股份有限公司 | A kind of common vertical frequency-changing three-phase asynchronous motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109378923A (en) * | 2018-11-28 | 2019-02-22 | 武汉奥特彼电机有限公司 | Flange base integration Induction Motor Structure and operation method |
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| CN112510919A (en) * | 2020-11-23 | 2021-03-16 | 华能国际电力股份有限公司井冈山电厂 | Cooling device of fan type load motor of thermal power plant |
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Application publication date: 20180518 |
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| RJ01 | Rejection of invention patent application after publication |