CN110401173A - A kind of short trouble isolation structure of aero dynamo - Google Patents
A kind of short trouble isolation structure of aero dynamo Download PDFInfo
- Publication number
- CN110401173A CN110401173A CN201910652290.0A CN201910652290A CN110401173A CN 110401173 A CN110401173 A CN 110401173A CN 201910652290 A CN201910652290 A CN 201910652290A CN 110401173 A CN110401173 A CN 110401173A
- Authority
- CN
- China
- Prior art keywords
- hole
- bolt
- layer
- detection means
- end cap
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
-
- 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
- H02K5/08—Insulating casings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
A kind of short trouble isolation structure of aero dynamo, including electrical isolation end cap, insulated bolt, electrical isolation bearing, current detection means and normally closed switch.Electrical isolation end cap is separately mounted to the rear and front end of motor case, is fixed on motor case by insulated bolt.The end cap that is electrically insulated is three layers, and inside and outside two layers is metal layer, and middle layer is insulating layer.Inside and outside two layers of through-hole is provided on each electrical isolation end cap, through-hole coaxially waits radiuses to be evenly arranged centered on shaft, and the position of inside and outside two layers of through-hole is corresponding, and insulated bolt passes through through-hole and three-decker is fixed as one.Insulated bolt is made of bolt, insulation spacer and insulating sleeve, and the position that bolt is contacted with metal chassis end face is lined with insulation spacer, and bolt cylindrical surface passes through end cap and the position of metal shell is cased with insulating sleeve.Motor case is grounded through current detection means and switch, and motor case connects current detection means, and current detection means connects normally closed switch, the rear end ground connection of normally closed switch.
Description
Technical field
The present invention relates to a kind of motor, in particular to the short trouble isolation structure of a kind of aero dynamo.
Background technique
Currently, mostly electricity/electric aircraft is just entering the all-round developing stage, aeroplane motor system is on mostly electricity/electric aircraft
Gradually instead of original hydraulic mechanism etc., powerful promotion energy is provided on electric propulsion aircraft.Aerogenerator system needs
Meet aircraft electrical equipment large capacity, highly reliable electrical energy demands.Therefore, by aeroplane motor system and generator system structure
At modern Aviation electric system be support aircraft electricalization development important foundation.
All kinds of short troubles, such as turn-to-turn short circuit, phase fault, winding pair may occur during operation for aero dynamo
Casing short circuit etc., short circuit can cause spark or electric arc.Short circuit, which occurs, in aero dynamo can seriously affect flight safety, and short circuit is occurring
It usually requires to carry out demagnetization, arc extinguishing processing when failure.But the particularity of the aloft work environment due to aero dynamo, high-altitude arc extinguishing
Relatively difficult, controllable degree is not high；And structure is complicated, revolving speed is low, power density is low, effect for the electro-magnetic motor with demagnetization function
Rate is low.Although magneto structure is simple, revolving speed is high, power density is high, high-efficient, p-m rotor is difficult to demagnetization, affects
Application of the magneto in aero dynamo.Therefore, if you do not need to arc extinguishing, demagnetization, can solve to navigate from other angles
The problem of empty magneto short circuit, a kind of good method of also can yet be regarded as.
Patent CN201521058794.3 proposes a kind of New Insulation Structure of insulation end cover of wind driven generators.This is practical new
Type master to be protected is a kind of used insulated end cover technology of limitation shaft current generation, is designed as being mounted on generator bearing room
The position of upper installation end cap, completely insulated with bearing chamber to end cap, limitation shaft current generates.Insulation insulation lantern ring, bolt sleeve
Ring and big gasket are realized.
Patent CN201410530835.8 proposes the insulated end cover and motor of a kind of motor stator, motor stator.Its intermediary
The insulated end cover that continues includes lid and multiple end cap teeth, and multiple end cap teeth are located at the week on the outer peripheral surface of lid and along lid to each other
It is spaced apart, forms end cap slot corresponding with stator slot between adjacent end cap tooth, end cap tooth is equipped with paper jam slot, and insulating slot paper is located at
In the stator slot and both ends of insulating slot paper are respectively fitting into paper jam slot.This design is also to be used to limit shaft current generation,
Structure is more complex.
Existing patent is substantially in the design aspect of insulating end cover for motor as listed two patents are identical, is for axis
Current limit, still, other than shaft current needs to limit, it is also necessary to consider the various short-circuit shapes that machine winding may occur
Condition.
Summary of the invention
The purpose of the present invention is overcome aircraft permanent magnet motor to be not easy arc extinguishing, demagnetization when short trouble occurring in operation
Disadvantage proposes a kind of short trouble isolation structure of aero dynamo.The present invention from cutting short circuit current path angle, from
The structure design of motor itself is started with, even if short trouble occurs, entire motor External Insulation will not generate high current, keep away
Exempt to cause serious consequence.
The short trouble isolation structure of aero dynamo of the present invention includes electrical isolation end cap, insulated bolt, electrical isolation bearing, electricity
Flow detection device and normally closed switch.
The electrical isolation end cap is separately mounted to the rear and front end of motor case, is fixed on motor machine by insulated bolt
On shell.The end cap that is electrically insulated uses three-layer type interlayer structure, and inside and outside two layers is metal layer, respectively inner metal layer and outer metal
Layer, middle layer is insulating layer.In order to compress three-decker, inside and outside two layers of through-hole is provided on every layer of end cap, through-hole is with shaft
Centered on coaxially equal radiuses be evenly arranged, the position of internal layer through-hole and outer layer through-hole is corresponding.Including internal layer through-hole, outer layer through-hole exists
Outside, the annular radii where internal layer through-hole is less than the radius of the annulus where outer layer through-hole.With insulated bolt by inner metal layer, absolutely
Edge layer and outer metal layer are compressed and are fixed as one, and form electrical isolation end cap.
The insulated bolt is made of bolt, insulation spacer and insulating sleeve three parts, bolt and metal chassis end face
The position of contact is lined with insulation spacer, and bolt cylindrical surface passes through end cap and the position of metal shell is cased with insulating sleeve, it is ensured that end
Cover housing and motor casing insulate.
Motor bearings of the invention is using electrical isolation bearing, and such as ceramic ball bearing cooperates the insulated end cover, to keep away
Exempt from short circuit current and flows through rotor.
It further, is the short trouble for avoiding aero dynamo that from may occurring during operation, aero dynamo machine of the present invention
Shell is grounded through current detection means and switch, and motor case is connected with current detection means, and current detection means connection is normally closed to open
It closes, the rear end ground connection of normally closed switch.When the grounded line of electric current flows to ground, current detection means is first flowed through, when winding is short to casing
Lu Shi generates high current, and when current detection means detects the high current more than established standards, the normally closed switch on ground line is disconnected
It opens, cuts off earth-return circuit in time, motor housing current potential increases at this time, but will not occur to discharge over the ground, plays a protective role.By
This casing short trouble is isolated the winding that aero dynamo may occur during operation.
Detailed description of the invention
The short trouble isolation structure schematic diagram of Fig. 1 aero dynamo of the present invention；
Fig. 2 insulating end cover for motor structural schematic diagram of the present invention；
Fig. 3 insulating end cover for motor structural schematic diagram of the present invention；
Fig. 4 a, Fig. 4 b insulated bolt structural schematic diagram of the present invention；
Fig. 5 motor overall structure diagram of the present invention；
Fig. 6 motor overall structure diagram of the present invention.
In figure: 1 motor, 2 insulated end covers, 3 inner metal layers, 4 outer metal layers, 5 insulating layers, 6 insulated bolts, 7 electrical isolation axis
It holds, 8 current detection means, 9 switches, 10 casings, 11 bolts, 12 insulation spacers, 13 insulating sleeves.
Specific embodiment
The short trouble isolation structure embodiment of aero dynamo of the present invention as shown in Figure 1 includes: electrical isolation end cap 2, insulation
Bolt 6, electrical isolation bearing 7, current detection means 8 and switch 9.
Before the electrical isolation end cap 2 of the aero dynamo 1 of short trouble isolation structure of the present invention is separately mounted to motor case
Both ends afterwards are fixed on motor case 10 by insulated bolt 6.As shown in Figures 2 and 3, the insulated end cover 2 uses three-layer type
Interlayer structure, inside and outside two layers is metal layer, respectively inner metal layer 3 and outer metal layer 4, and middle layer is insulating layer 5, in order to incite somebody to action
The three-decker of insulated end cover 2 compresses, and inside and outside two layers of through-hole is provided on each electrical isolation end cap, and through-hole is same centered on shaft
The radiuses such as axis are evenly arranged, and the position of internal layer through-hole and outer layer through-hole is corresponding.Including internal layer through-hole, outer layer through-hole outside, internal layer
Annular radii where through-hole is less than the radius of the annulus where outer layer through-hole.Insulated bolt 6 is by inner metal layer 3,5 and of insulating layer
Outer metal layer 4 is compressed and is fixed as one, and forms electrical isolation end cap 2.
As shown in Fig. 4 a, Fig. 4 b, the insulated bolt 6 is by 13 three parts of bolt 11, insulation spacer 12 and insulating sleeve
Composition.The position that bolt 11 is contacted with metal chassis end face is lined with insulation spacer 12, passes through end cap and gold on 11 cylindrical surface of bolt
The position for belonging to shell is cased with insulating sleeve 13, it is ensured that end cap shell and motor casing insulate.
Motor bearings of the invention is cooperated the insulated end cover 2, is kept away using electrical isolation bearing 7, such as ceramic ball bearing
Exempt from short circuit current and flows through rotor.
As shown in Figure 5 and Figure 6, motor cooperation electrical isolation bearing, current detection means and switch collectively constitute a kind of aviation
The short trouble isolation structure of motor.
It further, is the short trouble for avoiding aero dynamo that from may occurring during operation, motor case of the invention
It is grounded through current detection means 8 and normally closed switch 9, motor case connects current detection means 8, and current detection means 8 connects often
Make and break closes 9,9 rear end of normally closed switch ground connection.When the grounded line of electric current flows to ground, current detection means 8 is first flowed through, machine winding is worked as
When to casing short circuit, high current is generated, when current detection means 8 detects the high current more than established standards, on ground line
Normally closed switch 9 disconnects, and cuts off earth-return circuit in time, and motor housing current potential increases at this time, but will not occur to discharge over the ground, plays
Protective effect.
Claims (4)
1. a kind of short trouble isolation structure of aero dynamo, it is characterised in that: the short trouble of the aero dynamo is isolated
Structure includes electrical isolation end cap, insulated bolt, electrical isolation bearing, current detection means and normally closed switch；The electrical isolation end
Lid is separately mounted to the rear and front end of motor case, is fixed on motor case by insulated bolt；The insulated bolt by
Bolt, insulation spacer and insulating sleeve three parts composition, the position that bolt is contacted with metal chassis end face is lined with insulation spacer, spiral shell
Bolt cylindrical surface passes through end cap and the position of metal shell is cased with insulating sleeve, it is ensured that end cap shell and motor casing insulate；Motor machine
Shell is grounded through current detection means and switch, and motor case is connected with current detection means, and current detection means connection is normally closed to open
It closes, the rear end ground connection of normally closed switch.
2. the short trouble isolation structure of aero dynamo described in accordance with the claim 1, it is characterised in that: the electrical isolation end
Lid uses three-layer type interlayer structure, and inside and outside two layers is metal layer, respectively inner metal layer and outer metal layer, and middle layer is insulation
Layer；Inside and outside two layers of through-hole is provided on each electrical isolation end cap, through-hole coaxially waits radiuses to be evenly arranged centered on shaft, and internal layer is logical
The position of the good outer layer through-hole in hole is corresponding；Including internal layer through-hole, outside, the annular radii where internal layer through-hole is less than outer outer layer through-hole
The radius of annulus where layer through-hole；Inner metal layer, insulating layer and outer metal layer are compressed by insulated bolt and are fixed as one
Body forms electrical isolation end cap.
3. the short trouble isolation structure of aero dynamo described in accordance with the claim 1, it is characterised in that: when the grounded line of electric current
When flow direction ground, current detection means is first flowed through, when machine winding is to casing short circuit, generates high current, current detection means inspection
When measuring the high current more than established standards, the normally closed switch on ground line is disconnected, and earth-return circuit is cut off in time, at this time outside motor
Shell current potential increases, but will not occur to discharge over the ground, plays a protective role；Thus isolation aero dynamo during operation may hair
Raw winding is to casing short trouble.
4. the short trouble isolation structure of aero dynamo described in accordance with the claim 1, it is characterised in that: the motor bearings
Using electrical isolation bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910652290.0A CN110401173B (en) | 2019-07-19 | 2019-07-19 | Short-circuit fault isolation structure of aviation motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910652290.0A CN110401173B (en) | 2019-07-19 | 2019-07-19 | Short-circuit fault isolation structure of aviation motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110401173A true CN110401173A (en) | 2019-11-01 |
| CN110401173B CN110401173B (en) | 2021-03-26 |
Family
ID=68324665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910652290.0A Active CN110401173B (en) | 2019-07-19 | 2019-07-19 | Short-circuit fault isolation structure of aviation motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110401173B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113419148A (en) * | 2021-06-30 | 2021-09-21 | 深圳市准点仪器有限公司 | Testing method for motor winding insulation |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3632256A1 (en) * | 1985-10-14 | 1987-04-23 | Omp Off Meccano Plast | PROTECTIVE DEVICE FOR AN ELECTRIC MOTOR, ESPECIALLY FOR THE COMPRESSOR MOTOR OF A REFRIGERATOR |
| JP2009171669A (en) * | 2008-01-11 | 2009-07-30 | Toshiba Corp | Underwater drive motor |
| CN201663432U (en) * | 2009-12-11 | 2010-12-01 | 森萨塔科技麻省公司 | Motor protector |
| CN201918701U (en) * | 2010-12-31 | 2011-08-03 | 浙江安美德汽车配件有限公司 | Short-circuit prevention coil rack structure of automobile engine |
| CN102694368A (en) * | 2011-03-24 | 2012-09-26 | 通用电气公司 | Shorting protection for systems having electric machines |
| CN202586584U (en) * | 2012-05-14 | 2012-12-05 | 成都佳电电机有限公司 | Insulating end cover of aerogenerator |
| CN203562867U (en) * | 2013-11-04 | 2014-04-23 | 合肥荣事达三洋电器股份有限公司 | Insulating motor cover |
| CN104362791A (en) * | 2014-10-10 | 2015-02-18 | 杭州九维自动化设备有限公司 | Motor stator, motor stator insulation end cover and motor |
| CN104578638A (en) * | 2015-02-05 | 2015-04-29 | 杭州天航国发科技有限公司 | Center point lightning-protection type vertical axis outer rotor permanent magnet coreless coil generator |
| CN105262285A (en) * | 2015-12-01 | 2016-01-20 | 成都叮当自动化设备有限公司 | Manufacturing technology of motor for aviation |
| CN205212604U (en) * | 2015-12-18 | 2016-05-04 | 永济市众鑫电机配件制造有限公司 | Novel insulation system of insulating end cover of aerogenerator |
| CN207926296U (en) * | 2018-02-13 | 2018-09-28 | 中山大洋电机股份有限公司 | A kind of motor stator and its motor of application |
-
2019
- 2019-07-19 CN CN201910652290.0A patent/CN110401173B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3632256A1 (en) * | 1985-10-14 | 1987-04-23 | Omp Off Meccano Plast | PROTECTIVE DEVICE FOR AN ELECTRIC MOTOR, ESPECIALLY FOR THE COMPRESSOR MOTOR OF A REFRIGERATOR |
| JP2009171669A (en) * | 2008-01-11 | 2009-07-30 | Toshiba Corp | Underwater drive motor |
| CN201663432U (en) * | 2009-12-11 | 2010-12-01 | 森萨塔科技麻省公司 | Motor protector |
| CN201918701U (en) * | 2010-12-31 | 2011-08-03 | 浙江安美德汽车配件有限公司 | Short-circuit prevention coil rack structure of automobile engine |
| CN102694368A (en) * | 2011-03-24 | 2012-09-26 | 通用电气公司 | Shorting protection for systems having electric machines |
| CN202586584U (en) * | 2012-05-14 | 2012-12-05 | 成都佳电电机有限公司 | Insulating end cover of aerogenerator |
| CN203562867U (en) * | 2013-11-04 | 2014-04-23 | 合肥荣事达三洋电器股份有限公司 | Insulating motor cover |
| CN104362791A (en) * | 2014-10-10 | 2015-02-18 | 杭州九维自动化设备有限公司 | Motor stator, motor stator insulation end cover and motor |
| CN104578638A (en) * | 2015-02-05 | 2015-04-29 | 杭州天航国发科技有限公司 | Center point lightning-protection type vertical axis outer rotor permanent magnet coreless coil generator |
| CN105262285A (en) * | 2015-12-01 | 2016-01-20 | 成都叮当自动化设备有限公司 | Manufacturing technology of motor for aviation |
| CN205212604U (en) * | 2015-12-18 | 2016-05-04 | 永济市众鑫电机配件制造有限公司 | Novel insulation system of insulating end cover of aerogenerator |
| CN207926296U (en) * | 2018-02-13 | 2018-09-28 | 中山大洋电机股份有限公司 | A kind of motor stator and its motor of application |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113419148A (en) * | 2021-06-30 | 2021-09-21 | 深圳市准点仪器有限公司 | Testing method for motor winding insulation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110401173B (en) | 2021-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20120321473A1 (en) | Redundant pitch system | |
| CN102820626B (en) | Solid insulation vacuum ring-network cabinet | |
| EP2562926B1 (en) | Fault clearing method for permanent magnet machines | |
| CN210958063U (en) | Insulation protection device for bearing of wind driven generator | |
| CN110401173A (en) | A kind of short trouble isolation structure of aero dynamo | |
| CN218570042U (en) | Electric machine | |
| CA1062769A (en) | Field protector for synchronous machines | |
| CN203377190U (en) | Vacuum load isolation switch-fuse combination electric appliance used for wind power and switch cabinet thereof | |
| US20120049518A1 (en) | Switchgear cubicle arrangement | |
| US10882627B2 (en) | Aircraft drive device and aircraft provided with a drive device | |
| CN209823554U (en) | Conductive framework oil seal structure | |
| CN108547343A (en) | A kind of high-power power type hydraulic crawler excavator soft start control system | |
| US11885308B2 (en) | Lightning magnetic flux density reduction in wind turbines | |
| US3091714A (en) | Collector ring assembly with field winding discharge air gap | |
| CN110535314A (en) | Automobile series circuit hybrid excitation generator | |
| CN219936780U (en) | Outdoor composite insulation voltage transformer | |
| CN216122158U (en) | Same-slot double-winding redundant permanent magnet synchronous motor | |
| CN216929813U (en) | Grounding device for reducing induced voltage of generator | |
| CN212303529U (en) | Special solid-sealed pole circuit breaker for wind power | |
| CN219592193U (en) | Insulating end cover of motor | |
| CN205154403U (en) | A miniature high -speed power generation system for on turbojet engine | |
| KR102647630B1 (en) | Rotor assembly for generator having ground fault avoid reinforcement | |
| CN106655676B (en) | Five mutually fault-tolerant automobile current generators being respectively isolated | |
| CN105743057A (en) | High-voltage current-limiting protection apparatus for key water-control project | |
| CN103337433B (en) | Vacuum load isolating switch-fuse combined electric apparatus and switch cubicle thereof for wind-powered electricity generation |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |