CN201226470Y - High-power variable-frequency control three-phase asynchronous motor with grounding carbon brush - Google Patents
High-power variable-frequency control three-phase asynchronous motor with grounding carbon brush Download PDFInfo
- Publication number
- CN201226470Y CN201226470Y CNU2008200749481U CN200820074948U CN201226470Y CN 201226470 Y CN201226470 Y CN 201226470Y CN U2008200749481 U CNU2008200749481 U CN U2008200749481U CN 200820074948 U CN200820074948 U CN 200820074948U CN 201226470 Y CN201226470 Y CN 201226470Y
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- carbon brush
- ground connection
- bearing
- cover
- motor
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Abstract
The utility model relates to a high-power frequency control triphase asynchronous motor with grounding carbon brushes. The high-power frequency control triphase asynchronous motor comprises a motor frame, end covers, a stator, a rotor and a motor shaft. Bearings and external bearing covers are arranged on both ends of the motor shaft. Grounding carbon brushes contacting with the shaft are arranged on the front external bearing cover and the back external bearing cover of the motor. The grounding carbon brushes are connected with the end covers through carbon brush lead wires and special connecting lead wires. Protective caps are arranged on the outer side of the grounding carbon brushes, which are connected with the end covers. The high-power frequency control triphase asynchronous motor has the advantages that the motor shaft connected with the inner rings of a front bearing and a rear bearing is short circuited with the outer rings of the front bearing and the rear bearing through the special connecting lead wires, thus preventing the shaft current from passing the clearances of the bearings and from damaging the bearings, which is significantly effective in overwhelming the shaft current of the high-power frequency control triphase asynchronous motor. In addition, the protective caps with detachable cover plates are arranged on the outer side of the grounding carbon brushes, the running states of the grounding carbon brushes can be observed conveniently; in addition, the grounding carbon brushes can be maintained and replaced on line.
Description
Technical field
The utility model belongs to the motor manufacturing technology field, particularly relates to a kind of high-power frequency conversion speed governing threephase asynchronous machine that has the ground connection carbon brush.
Background technology
At present, along with improving constantly of voltage source PWM high-power frequency conversion speed governing threephase asynchronous machine combination property, its range of application more and more widely.But in the extensive use of frequency control threephase asynchronous machine, there are some significant negative effects, because the high frequency common mode voltage that frequency-changing speed regulation driver produces, can on motor shaft, induce the high frequency value shaft voltage, and the formation shaft current, the bearing of motor is damaged in a short time, cause system reliability to descend, failure rate increases, and shortens motor useful life.Overcome the measure of shaft current though also researched and developed some in the market in succession, its complex structure, cost is higher, and safeguards cumbersome; In addition, adopt non-dismountable structure, therefore operate and safeguard extremely inconvenience because it designs.
Summary of the invention
The utility model for solve the technical problem that exists in the known technology provide a kind of simple in structure, be convenient to dismantle and maintenance and the lower-cost high-power frequency conversion speed governing threephase asynchronous machine that has the ground connection carbon brush.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: the high-power frequency conversion speed governing threephase asynchronous machine that has the ground connection carbon brush, comprise electric machine stand, end cap, stator, rotor and motor shaft, bearing and bearing end cover are equipped with in the motor shaft two ends, it is characterized in that: outside the fore bearing enclosing cover of motor and rear bearing, cover and be equipped with and the contacted ground connection carbon brush of axle, the ground connection carbon brush connects end cap by the carbon brush lead-in wire with the special-purpose lead-in wire that is connected, be provided with protective cover in the ground connection carbon brush outside, this protective cover is connected with end cap.
The utility model can also adopt following technical scheme:
Described fore bearing enclosing cover and rear bearing cover outward two ground connection carbon brush respectively are installed.
Described protective cover is dismantled and assembled structure, and dismountable protective cover cover plate is installed on protective cover.
Advantage and the good effect that the utlity model has are: because the utility model adopts technique scheme, promptly outside the fore bearing enclosing cover of motor and rear bearing, cover and be equipped with and the contacted ground connection carbon brush of axle, the ground connection carbon brush connects end cap by the carbon brush lead-in wire with the special-purpose lead-in wire that is connected, before can making like this, the motor shaft that the rear bearing inner ring links to each other and the end cap that links to each other with its outer ring are connected lead short circuit by the special use of ground connection carbon brush, avoid shaft current to cause damage of the bearing by bearing clearance, the technical program has positive effect to the shaft current that overcomes high-power frequency conversion speed governing threephase asynchronous machine.In addition, the protective cover with detachable cover plate is housed outside the ground connection carbon brush, not only can be convenient to observe ground connection carbon brush operation conditions, but also can onlinely safeguards and change carbon brush it.The utility model is compared with the existing measure that overcomes shaft current, has advantage simple in structure, with low cost and that be convenient to operate.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1, motor shaft; 2, ground connection carbon brush; 3, brush holder support; 4, bearing end cover; 5, the special-purpose lead-in wire that connects; 6, protective cover cover plate; 7, protective cover; 8, end cap; 9, fore bearing; 10, rear bearing; 11, fan shroud; 12, fan shroud cover plate; 13, rotor; 14, stator; 15, support.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1, the high-power frequency conversion speed governing threephase asynchronous machine that has the ground connection carbon brush, comprise electric machine stand 15, end cap 8, stator 14, rotor 13 and motor shaft 1, fore bearing 9 and rear bearing 10 are equipped with in the two ends of motor shaft 1, the two bearings outside is equipped with bearing end cover 4, covers respectively to be equipped with and motor shaft 1 contacted two ground connection carbon brush 2 outside the fore bearing enclosing cover of motor and rear bearing.The ground connection carbon brush connects fore bearing enclosing cover and rear bearing enclosing cover by brush holder support 3, ground connection carbon brush 2 connects end cap 8 by the carbon brush lead-in wire with the special-purpose lead-in wire 5 that is connected, can make fore bearing 9 inner rings motor shaft 1 that links to each other and the end cap 8 that links to each other with fore bearing 9 outer rings be connected lead-in wire 5 short circuits like this, avoid shaft current to cause by bearing clearance by the special use of ground connection carbon brush 2.In order to prevent that the ground connection carbon brush from meeting with external force and causing damage, the ground connection carbon brush outside at the motor shaft two ends is equipped with protective cover, at the shaft extension end protective cover 7 is installed, this protective cover is connected with end cap 8, dismountable protective cover cover plate 6 is installed, so that the ruuning situation of observation ground connection carbon brush 2 and easy to maintenance on this protective cover.The protective cover of non-shaft stretching end ground connection carbon brush 2 adopts motor fan cover 11, for on-line maintenance be convenient for changing the ground connection carbon brush, dismountable blower fan cover plate 12 is housed in the fan shroud rear end, like this can be under the situation of not tearing fan shroud open, carry out the inspection of ground connection carbon brush easily and more change jobs.
Claims (3)
1. high-power frequency conversion speed governing threephase asynchronous machine that has the ground connection carbon brush, comprise electric machine stand, end cap, stator, rotor and motor shaft, at the motor shaft two ends bearing and bearing end cover are housed, it is characterized in that: outside the fore bearing enclosing cover of motor and rear bearing, cover and be equipped with and the contacted ground connection carbon brush of axle, the ground connection carbon brush connects end cap by the carbon brush lead-in wire with the special-purpose lead-in wire that is connected, be provided with protective cover in the ground connection carbon brush outside, this protective cover is connected with end cap.
2. the high-power frequency conversion speed governing threephase asynchronous machine that has the ground connection carbon brush according to claim 1 is characterized in that: described fore bearing enclosing cover and rear bearing cover outward two ground connection carbon brush respectively are installed.
3. the high-power frequency conversion speed governing threephase asynchronous machine that has the ground connection carbon brush according to claim 1, it is characterized in that: described protective cover is dismantled and assembled structure, and dismountable protective cover cover plate is installed on protective cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200749481U CN201226470Y (en) | 2008-06-04 | 2008-06-04 | High-power variable-frequency control three-phase asynchronous motor with grounding carbon brush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200749481U CN201226470Y (en) | 2008-06-04 | 2008-06-04 | High-power variable-frequency control three-phase asynchronous motor with grounding carbon brush |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201226470Y true CN201226470Y (en) | 2009-04-22 |
Family
ID=40599372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200749481U Expired - Fee Related CN201226470Y (en) | 2008-06-04 | 2008-06-04 | High-power variable-frequency control three-phase asynchronous motor with grounding carbon brush |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201226470Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908785A (en) * | 2010-06-24 | 2010-12-08 | 广东威灵电机制造有限公司 | Motor |
| CN103580390A (en) * | 2013-11-13 | 2014-02-12 | 中电电机股份有限公司 | Ground connection structure for reducing shaft voltage of double-fed wind generator |
-
2008
- 2008-06-04 CN CNU2008200749481U patent/CN201226470Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908785A (en) * | 2010-06-24 | 2010-12-08 | 广东威灵电机制造有限公司 | Motor |
| CN101908785B (en) * | 2010-06-24 | 2012-07-11 | 广东威灵电机制造有限公司 | Motor |
| CN103580390A (en) * | 2013-11-13 | 2014-02-12 | 中电电机股份有限公司 | Ground connection structure for reducing shaft voltage of double-fed wind generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090422 Termination date: 20130604 |