CN106655557A - Asynchronous generator for alternating current transmission system of tractor - Google Patents
Asynchronous generator for alternating current transmission system of tractor Download PDFInfo
- Publication number
- CN106655557A CN106655557A CN201611073124.8A CN201611073124A CN106655557A CN 106655557 A CN106655557 A CN 106655557A CN 201611073124 A CN201611073124 A CN 201611073124A CN 106655557 A CN106655557 A CN 106655557A
- Authority
- CN
- China
- Prior art keywords
- alternating current
- motor
- asynchronous generator
- tractor
- bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- H02K1/16—Stator cores with slots for windings
-
- 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
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- 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
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention relates to an alternating current transmission system technology, specifically to an asynchronous generator for an alternating current transmission system of a tractor, and solves the technical problems of relatively high cost and poor cooling effect of a synchronous motor adopted by the existing alternating current transmission system of the tractor. The asynchronous generator for the alternating current transmission system of the tractor comprises a motor seat, a front end cover and a back end cover which are mounted at the front end and the back end of the motor seat respectively, a main engine stator and a main engine rotor which are positioned in a motor seat inner cavity, and a rotary shaft supported by bearings at the two ends; a main engine stator coil is formed by a corona-resistant melted and coated thin film wire in a scattered winding manner; the main engine rotor adopts a mouse cage structure, and is formed by a copper conductive strip end ring in a welding manner; the motor adopts a hybrid type heat dissipation structure; parallel water channels are manufactured in the motor seat, and a water sleeve for performing motor seat water cooling is arranged on the exterior; and a mixed-flow fan, which is arranged on the rotary shaft and used for automatic ventilating and air cooling, is positioned in a position, close to the front end cover, in the motor seat inner cavity. The asynchronous generator is reliable in operation, simple to maintain, and capable of lowering maintenance time of the motor by a user and maintenance cost.
Description
Technical field
The present invention relates to alternating current drive systems technology, specially a kind of tractor alternating current drive system asynchronous generating
Machine.
Background technology
Domestic alternating current drive system has obtained fast development in recent years, is that its supporting synchronous generator is drawn by technology
Enter and innovate the technology platform for establishing oneself again, it is widely used in the neck such as diesel locomotive, large-scale mine dumper, purse seiner
Domain.But synchronous alternating-current generator includes the Energizing units such as exciter or slip ring, its volume relatively with power asynchronous generator compared with
Greatly, be it is cost-effective and save car on space, replace synchronous generator to be received in the industry with asynchronous generator.It is big both at home and abroad
Company puts into ample resources and carries out the research and development of such asynchronous generator.In alternating current drive system regions, by asynchronous generator
Synchronous generator is replaced to there are huge market prospects.
In prior art, there is the technical scheme of brush synchronous generator as shown in figure 3, its design feature is as follows：
A. pole core is folded by punching and formed, and centre is installed with pull bar, with the pole end-plate bolt at two ends be tightened to one it is whole
Body.Pole coil is formed by flat type copper wire coiling.Magnetic pole has unshakable in one's determination and coil two parts, and all gaps are insulated between unshakable in one's determination and coil
Thing is filled, and becomes magnetic pole integral structure.Magnetic pole is fastened in yoke with special high-strength bolt；
B. rotor magnetic pole winding is by sliding ring brush frame system and external connection, the direct current that exciting current is provided for external power source.
Exciting current can accordingly be adjusted according to the change of generator load, maintain motor output voltage to be set-point；
C. when generator breaks down, demagnetization is carried out, to reduce breakdown loss degree；
D. motor rotor construction is simple, and safety coefficient is high, and cost is relatively low.
In prior art, technical scheme such as Fig. 4 of no-brush synchronous generator shows that its design feature is as follows：
A. main rotor, rotary rectifier module, exciter rotor are co-axially mounted by energy flux order；
B. motor current-carrying part does not have rotating contact, does not produce spark, it is adaptable to have inflammable gas and many dust etc. high-risk severe
Environment；
C. fricton-tight contact portion, reliability height, safeguard simple, can continuously run for a long time；
D. because no-brush synchronous generator is into indirect control main generator excitation power controls excitation by multistage generating set
Power very little, therefore exciting power adjusting means small volume, caloric value is low.
The shortcoming of existing synchronous generator technical scheme：
A. motor includes the Energizing units such as exciter or slip ring, and its volume is larger, relatively costly；
B. there is brush synchronous generator carbon brush to be wear-out part, replacing need to be made regular check on, maintenance cost is higher；
C. no-brush synchronous generator rotary rectifier module is consumable accessory, and turnover rate is higher；
D., using from cold or forced air cooling is fanned, motor temperature rise is higher, and power density is relatively low under same volume for the type of cooling.
The content of the invention
There is relatively costly and cooling effect using synchronous motor to solve current tractor alternating current drive system in the present invention
A kind of not good technical problem of fruit, there is provided tractor alternating current drive system asynchronous generator.
The present invention employs the following technical solutions realization：A kind of tractor alternating current drive system asynchronous generator,
Including electric machine stand, the drive end bearing bracket and rear end cap that are separately mounted to electric machine stand front and back end, the main frame stator positioned at support inner chamber,
Main rotor and the rotating shaft supported by bearings at both ends；Main frame stator coil is dissipated around forming using Inverter fed motor deposition film wire,
Main rotor is cage-shaped structure, is formed using copper sliver end ring welding；Motor adopts mixed cooling structure：Add on electric machine stand
Work has parallel water channel, and outside carries out support water-cooled equipped with water jacket；It is provided near the position of drive end bearing bracket in support inner chamber and is mounted in rotating shaft
On mixed flow fan carry out from fanning wind cooling.
The technical characterstic of tractor alternating current drive system asynchronous generator of the present invention：
Stator coil is dissipated around forming using Inverter fed motor deposition film wire, and so as to reduce winding overhang size, increasing stator slot expires
Rate；
Rotor is cage-shaped structure, is formed using copper sliver end ring welding, and intensity is high and technique makes and easily realizes.Rotor punching sets
There is single axial ventilation hole；
Motor bearings is using the bearing arrangement fixed+float；The deep groove ball bearing of drive end is positioning bearing；Anti-drive end
Deep groove ball bearing be floating bearing, pretension is carried out to bearing using wavy spring；
Motor adopts mixed cooling structure.Parallel water channel is machined with electric machine stand, outside carries out support water-cooled equipped with water jacket
（Water+ethylene glycol）, carry out from fanning wind cooling equipped with mixed flow fan in rotating shaft；
Rotating shaft adopts hollow shaft structure, mitigates motor weight, by fail-safe analysis, it is ensured that its transmission capacity, deformation meet skill
Art is required.
New-type asynchronous generator of the present invention supports horizontal type structure, flange to install using duplex bearing.The type of cooling of motor is
Shell water-cooled（Water+ethylene glycol）, plus rotor from fan in it is cold；To reduce winding overhang size, increase stator copper factor, stator coil
Dissipated around forming using Inverter fed motor deposition film wire；Rotor is cage-shaped structure, is formed using copper sliver end ring welding, two ends end cap
And support is cast structure, motor bearings at both ends adopts seal ball bearing.
After the present invention program is implemented, synchronous generator is replaced by asynchronous generator in alternating current drive system, saved significantly
About generator cost and save space on car.It is reliable using asynchronous generator, safeguard simple, user is reduced to motor
Maintenance time and maintenance cost；Volume and weight that whole alternating current drive system takes are reduced, is car load miniaturization, light
Quantify there is provided possible.The research and development and operation of the machine, be by asynchronous generator promote the use of alternating current drive system other neck
Domain provides realistic basis.
Description of the drawings
Fig. 1 tractor alternating current drive system asynchronous generator structure charts of the present invention.
The parallel water channel structural representation of Fig. 2 electric machine stands.
Fig. 3 has brush synchronous generator structural representation.
Fig. 4 no-brush synchronous generator structural representations.
1- drive end bearing brackets, 2- mixed flow fans, 3-O type sealing rings, 4- water jackets, 5- main frame stators, 6- main rotors, 7- rear ends
Lid, 8- electric machine stands, the parallel water channels of 9-, 10- slip ring systems, 11- brush holder systems, 12- fans, 13- rotary rectifier modules, 14-
Exciter rotor, 15- exciter stators.
Specific embodiment
The outer wall of wound motor support 8 is machined with multiple parallel water channels 9, and the fixed sleeves of electric machine stand 8 are provided with water jacket 4, water jacket 4
Two ends and the outer wall of electric machine stand 8 between by O-ring seal 3 realize sealing；The cell wall end of the inwall of water jacket 4 and parallel water channel 9
Gap is left between（Guarantee that the coolant that Jing water inlets are entered can flow each parallel water channel）；The top of water jacket 4 be provided with
The water inlet for irrigating coolant that many parallel water channels 9 are connected, the bottom of water jacket 4 is provided with and is connected with many parallel water channels 9
Delivery port.
1st, tractor alternating current drive system asynchronous generator --- motor is governing type three phases squirrel-cage asynchronous motor, duplex bearing
Horizontal type structure, flange is supported to install, rotating shaft is hollow shaft.Stator coil is dissipated around forming using Inverter fed motor deposition film wire, fixed
Sub- entirety carries out vacuum pressure impregnation.Rotor is cage-shaped structure, is formed using copper sliver end ring welding, and rotor punching is provided with single
Axial ventilation hole.Two ends end cap and support are cast structure, and motor bearings at both ends adopts seal ball bearing.
2nd, mixed cooling --- parallel water channel is machined with electric machine stand, outside is equipped with water jacket, and water jacket passes through O with support
Type sealing ring is sealed.Coolant（Water+ethylene glycol）Sprayed on support, by water jacket bottom by water jacket top water inlet pipe
Delivery port flows out automatically, without the need for providing extra pressure.Heat exchange is carried out with the external world equipped with mixed flow fan in rotating shaft, mouse cage temperature is reduced
Degree.
Specific implementation process：Stator and rotor are assembled after the completion of manufacturing respectively.After support and stator core hot jacket, will be fixed
In the embedded iron core of subcoil, overall dipping lacquer, baking after line.After rotating shaft processing, rotor punching, end ring sliver are laminated in rotating shaft
Welding is welded using Medium frequency induction.Rotor after fan is installed and integrally enters action balance.Rotor is assembled.Generator is passed through by diesel engine
Spline is dragged and generated electricity, and drive motor rotates to be car load and provides power after the rectified inversion of the three-phase alternating current for sending.
Claims (6)
1. a kind of tractor alternating current drive system asynchronous generator, including electric machine stand（8）, be separately mounted to electric machine stand
（8）The drive end bearing bracket of front and back end（1）And rear end cap（7）, positioned at the main frame stator of support inner chamber（5）, main rotor（6）With by two
The rotating shaft that end bearing is supported；Characterized in that, main frame stator coil is dissipated around forming using Inverter fed motor deposition film wire, main frame turns
Son（6）For cage-shaped structure, formed using copper sliver end ring welding；Motor adopts mixed cooling structure：Electric machine stand（8）It is upper to add
Work has parallel water channel（9）, outside is equipped with water jacket（4）Carry out support water-cooled；Near drive end bearing bracket in support inner chamber（1）Position be provided with
The mixed flow fan being mounted in rotating shaft（2）Carry out from fanning wind cooling.
2. a kind of tractor alternating current drive system asynchronous generator as claimed in claim 1, it is characterised in that around electricity
Machine support（8）Outer wall is machined with multiple parallel water channels（9）, electric machine stand（8）Fixed sleeves are provided with water jacket（4）, water jacket（4）Two
End and electric machine stand（8）Pass through O-ring seal between outer wall（3）Realize sealing；Water jacket（4）Inwall and parallel water channel（9）Groove
Gap is left between in wall end；Water jacket（4）Top is provided with and many parallel water channels（9）The water inlet for irrigating coolant being connected
Mouthful, water jacket（4）Bottom is provided with and many parallel water channels（9）The delivery port being connected.
3. a kind of tractor alternating current drive system asynchronous generator as claimed in claim 2, it is characterised in that constitute master
Machine rotor（6）Rotor punching be provided with single axial ventilation hole.
4. a kind of tractor alternating current drive system asynchronous generator as described in any one of claim 1 ~ 3, its feature exists
In motor bearings at both ends is using the bearing arrangement fixed+float：The deep groove ball bearing of drive end is positioning bearing；Non- drive
The deep groove ball bearing of moved end is floating bearing, and pretension is carried out to bearing using wavy spring.
5. a kind of tractor alternating current drive system asynchronous generator as described in any one of claim 1 ~ 3, its feature exists
In rotating shaft adopts hollow shaft structure；Drive end bearing bracket（1）, rear end cap（7）And electric machine stand（8）It is cast structure.
6. a kind of tractor alternating current drive system asynchronous generator as claimed in claim 4, it is characterised in that motor two
End bearing adopts seal ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611073124.8A CN106655557A (en) | 2016-11-29 | 2016-11-29 | Asynchronous generator for alternating current transmission system of tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611073124.8A CN106655557A (en) | 2016-11-29 | 2016-11-29 | Asynchronous generator for alternating current transmission system of tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106655557A true CN106655557A (en) | 2017-05-10 |
Family
ID=58813322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611073124.8A Pending CN106655557A (en) | 2016-11-29 | 2016-11-29 | Asynchronous generator for alternating current transmission system of tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106655557A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104540A (en) * | 2017-06-20 | 2017-08-29 | 温州君源汽车零部件有限公司 | Car water motor |
| CN107994706A (en) * | 2018-01-25 | 2018-05-04 | 博远机电（嘉兴）有限公司 | Super high speed motor |
| CN110401300A (en) * | 2019-07-31 | 2019-11-01 | 中车永济电机有限公司 | Mixed flow fan and motor |
| CN111130269A (en) * | 2018-10-30 | 2020-05-08 | 本田技研工业株式会社 | Saddle-ride type electric vehicle |
| CN114204738A (en) * | 2021-11-11 | 2022-03-18 | 中船重工电机科技股份有限公司 | Construction method of seawater direct-connection cooling structure of marine propulsion motor |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2056549U (en) * | 1989-04-22 | 1990-04-25 | 哈尔滨第二电机厂 | Air-tight sealing three-phase asynchronous motor for water cooling furnace |
| CN201341052Y (en) * | 2009-01-22 | 2009-11-04 | 大连天元电机有限公司 | Simple and convenient pulling motor water-cooling mechanism |
| CN201860219U (en) * | 2010-11-04 | 2011-06-08 | 中国第一汽车集团公司 | Variator and built-in motor of coupler of motor |
| CN103248165A (en) * | 2013-05-13 | 2013-08-14 | 天津市松正电动汽车技术股份有限公司 | Water-cooled machine water jacket structure and press mounting technology |
| CN203387360U (en) * | 2013-06-18 | 2014-01-08 | 德斯兰压缩机(上海)有限公司 | Motor |
| CN203445729U (en) * | 2013-05-28 | 2014-02-19 | 天津市松正电动汽车技术股份有限公司 | Motor water jacket rolling structure |
| US20140167535A1 (en) * | 2012-12-18 | 2014-06-19 | Kia Motors Corporation | Motor unit having cooling channel |
| CN103986251A (en) * | 2014-06-04 | 2014-08-13 | 江苏利得尔电机有限公司 | High-power density motor with water cooling structure |
| CN106100227A (en) * | 2016-08-16 | 2016-11-09 | 中车永济电机有限公司 | Large tractor alternating current electric drive system traction motor |
-
2016
- 2016-11-29 CN CN201611073124.8A patent/CN106655557A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2056549U (en) * | 1989-04-22 | 1990-04-25 | 哈尔滨第二电机厂 | Air-tight sealing three-phase asynchronous motor for water cooling furnace |
| CN201341052Y (en) * | 2009-01-22 | 2009-11-04 | 大连天元电机有限公司 | Simple and convenient pulling motor water-cooling mechanism |
| CN201860219U (en) * | 2010-11-04 | 2011-06-08 | 中国第一汽车集团公司 | Variator and built-in motor of coupler of motor |
| US20140167535A1 (en) * | 2012-12-18 | 2014-06-19 | Kia Motors Corporation | Motor unit having cooling channel |
| CN103248165A (en) * | 2013-05-13 | 2013-08-14 | 天津市松正电动汽车技术股份有限公司 | Water-cooled machine water jacket structure and press mounting technology |
| CN203445729U (en) * | 2013-05-28 | 2014-02-19 | 天津市松正电动汽车技术股份有限公司 | Motor water jacket rolling structure |
| CN203387360U (en) * | 2013-06-18 | 2014-01-08 | 德斯兰压缩机(上海)有限公司 | Motor |
| CN103986251A (en) * | 2014-06-04 | 2014-08-13 | 江苏利得尔电机有限公司 | High-power density motor with water cooling structure |
| CN106100227A (en) * | 2016-08-16 | 2016-11-09 | 中车永济电机有限公司 | Large tractor alternating current electric drive system traction motor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104540A (en) * | 2017-06-20 | 2017-08-29 | 温州君源汽车零部件有限公司 | Car water motor |
| CN107994706A (en) * | 2018-01-25 | 2018-05-04 | 博远机电（嘉兴）有限公司 | Super high speed motor |
| CN107994706B (en) * | 2018-01-25 | 2024-02-09 | 博远机电（嘉兴）有限公司 | Ultra-high speed motor |
| CN111130269A (en) * | 2018-10-30 | 2020-05-08 | 本田技研工业株式会社 | Saddle-ride type electric vehicle |
| US11180019B2 (en) | 2018-10-30 | 2021-11-23 | Honda Motor Co., Ltd. | Saddle-type electric vehicle |
| CN110401300A (en) * | 2019-07-31 | 2019-11-01 | 中车永济电机有限公司 | Mixed flow fan and motor |
| CN114204738A (en) * | 2021-11-11 | 2022-03-18 | 中船重工电机科技股份有限公司 | Construction method of seawater direct-connection cooling structure of marine propulsion motor |
| CN114204738B (en) * | 2021-11-11 | 2023-08-11 | 中船重工电机科技股份有限公司 | Construction method of sea water straight-through cooling structure of marine propulsion motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106655557A (en) | Asynchronous generator for alternating current transmission system of tractor | |
| CN204376659U (en) | Electric motor car birotor fluid-cooled electrical machine | |
| CN101873043A (en) | Asynchronous starting and permanent magnet synchronous submersible pump motor | |
| CN205248989U (en) | Circulative cooling motor in oil | |
| CN105141093A (en) | Safety-increasing explosion-proof type variable-frequency adjustable-speed asynchronous motor for petroleum drilling winch | |
| CN107005106A (en) | The cooling of the axial end regions of the stator of electric rotating machine | |
| CN102780340A (en) | Synchronous wind turbine generator | |
| CN217883068U (en) | Heat radiation structure of flywheel energy storage device and flywheel energy storage device | |
| CN206370743U (en) | A kind of efficient brushless generator | |
| CN101701583A (en) | Frequency-conversion high-speed permanent magnet shield pump | |
| CN201839151U (en) | Double-water channel cooling explosion-proof motor with end covers additionally arranged on stator base | |
| CN207150345U (en) | A kind of ventilation cooling system of hydrogenerator | |
| CN108539881A (en) | A kind of Turbo-generator Set device that more quality steams are provided | |
| CN102594004B (en) | High-power three-phase asynchronous motor with cooling water channels at end covers | |
| CN106961183A (en) | A kind of high efficiency heat radiation fan for synchronous alternating-current generator | |
| CN102195409A (en) | Double-fed asynchronous generator | |
| CN106953485B (en) | Stator winding water-cooled generator | |
| CN105162288B (en) | Circulation cooling electromechanical in a kind of oil | |
| CN208820625U (en) | A kind of Width funtion commutator generator | |
| CN203774940U (en) | Oiling bearing traction fan motor for high-power locomotive | |
| CN107294283A (en) | A kind of scaled bulb tubular hydraulic generator of brushless excitation | |
| CN107147245A (en) | A kind of scaled bulb tubular hydraulic generator | |
| CN205304554U (en) | Three -phase asynchronous motor | |
| CN203166719U (en) | Oiled bearing cooling fan motor used for locomotive | |
| CN208257518U (en) | A kind of Turbo-generator Set device that more quality steams are provided |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170510 |
|
| RJ01 | Rejection of invention patent application after publication |