CN202889117U - Shaft voltage inhibiting device for slip ring motor - Google Patents
Shaft voltage inhibiting device for slip ring motor Download PDFInfo
- Publication number
- CN202889117U CN202889117U CN201220354060XU CN201220354060U CN202889117U CN 202889117 U CN202889117 U CN 202889117U CN 201220354060X U CN201220354060X U CN 201220354060XU CN 201220354060 U CN201220354060 U CN 201220354060U CN 202889117 U CN202889117 U CN 202889117U
- Authority
- CN
- China
- Prior art keywords
- syndeton
- slip ring
- bearing
- motor
- shaft voltage
- 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.)
- Expired - Lifetime
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Abstract
The utility model discloses a shaft voltage inhibiting device for a slip ring motor. The shaft voltage inhibiting device for the slip ring motor includes two connection structures. One of the connection structures is installed on a drive shaft end of the slip ring motor while the other of the connection structures is installed on a non-drive shaft end of the slip ring motor. One end of the connection structure is contacted with the drive shaft in a rolling manner while the other end of the connection structure is connected with an outer ring of a bearing. A closed loop is formed among the drive shaft, an inner ring of the bearing, an outer ring of the bearing and the connection structure. The two connection structures are connected together in a circuit and are in ground connection in parallel.
Description
Technical field
The utility model relates to the bearing protection of slip ring motor, is specifically related to a kind of shaft voltage restraining device of slip ring motor.
Background technology
In the electric system with slip ring, more and more use current transformer (for example, using the rotor that current transformer drives slip ring motor, with the speed adjusting performance that obtains), yet, the application of current transformer, but the negative problem of a sequence brought.Along with the progress of science and technology, the switching speed of the employed power device of modern current transformer is more and more faster, and the switching frequency of current transformer is also higher, adopts the PWM modulation system to control more, when this type of current transformer is connected with motor, can produce voltage on the axle of motor.
This voltage can puncture bearing, and the electric weight of parasitic capacitance storage is released by puncture place, makes bearing generation galvano-cautery, and the long-term accumulation of this corrosiveness is damaged bearing, has a strong impact on the reliability of its use, shortens its useful life, increases maintenance cost.
Traditional solution is that current transformer is taked filtering measures, installs various types of filters additional such as the output at current transformer, with filtering common mode voltage, and then reduces shaft voltage; Other ways are that the axle of slip ring motor is installed earthing device, make an end ground connection of axle, to suppress common-mode voltage to the impact of bearing.
Yet for current transformer installs various forms of filters additional, cost is all higher, and need to take larger space, increases loss, and in force, difficulty is larger; Axle to slip ring motor carries out ground connection, can guarantee that the bearing of an end does not have shaft current to form, and still, may or there be larger shaft voltage in the other end, and the bearing of the other end still can be damaged.
Therefore be necessary prior art is improved.
The utility model content
For the problem that slip ring motor shaft voltage in the prior art is difficult to suppress, the utility model provides a kind of shaft voltage restraining device of simple in structure, with low cost, slip ring motor that rejection is good.
The technical solution adopted in the utility model is: the shaft voltage restraining device of slip ring motor, comprise two syndetons, one of them syndeton is installed in the motor-driven axle head, another syndeton is installed in motor nonpowered axle end, described syndeton one end rolls with driving shaft and contacts, other end connection bearing outer ring forms a closed-loop path between driving shaft, bearing inner race, bearing outer ring and syndeton, two syndetons form parallel connection and ground connection at circuit.
Further, the syndeton of described nonpowered axle end is arranged within the slip ring room.
Further, described syndeton directly is connected with described bearing outer ring, and the perhaps parts that directly link to each other of indirect joint and bearing outer ring are such as electric machine casing.
Further, described syndeton is grounding carbon brush, or other can rotate the electric installation that contacts with motor driving shaft.
Operation principle of the present utility model is: syndeton one end contacts with motor driving shaft; the driving shaft axle contacts with bearing inner race; the syndeton other end links to each other with the outer ring of bearing; thus; pass through syndeton; between motor driving shaft, bearing inner race, bearing outer ring, form a short circuit loop; the impedance in short circuit loop is very low; the electric weight of parasitic capacitance storage is released by this short circuit loop and can form the voltage that damages bearing at the motor-driven bearing; the galvanic corrosion phenomenon can not occur in bearing, and bearing is protected.
The utility model has the advantage of: the utility model forms the short circuit loop by at the two ends of motor driving shaft two syndetons being installed, so that the electric weight of parasitic capacitance storage is released by this loop and can not formed the voltage that damages bearing, short circuit loop conductivity is strong, can reach the effect that suppresses shaft voltage by simple structure of modification, and syndeton mainly is brush-system or other rotation contact conducting systems, with low cost, be fit to promote the use of.
Description of drawings
Fig. 1 is electrical block diagram of the present invention;
Among the figure: 1, drive shaft end syndeton, 2, the drive shaft end slip ring, 3, motor driving shaft, 4, the stator terminal box, 5, electric machine casing, 6, motor base, 7, rotor junction box (slip ring room), 8, rotating speed coder, 9, rotor ring, 10, nonpowered axle end syndeton.
Embodiment
Further set forth the utility model below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the shaft voltage restraining device of slip ring motor comprises two syndetons 1 and 10, and wherein syndeton 1 is installed in the motor-driven axle head, and syndeton 10 is installed in motor nonpowered axle end in addition.Described syndeton 1 or 10 1 ends roll with driving shaft 3 and contact, other end connection bearing outer ring, form a closed-loop path between driving shaft 3, bearing inner race, bearing outer ring and syndeton 1 or 10, two syndetons 1 and 10 form parallel connection and ground connection at circuit.
As further execution mode of the present utility model, further, the syndeton 10 of described nonpowered axle end is arranged within the slip ring room 7.
As further execution mode of the present utility model, described syndeton directly is connected with described bearing outer ring, and the perhaps parts that directly link to each other of indirect joint and bearing outer ring are such as electric machine casing 5.
As further execution mode of the present utility model, described syndeton 1 and 10 is grounding carbon brush, or other can rotate the electric installation that contacts with motor driving shaft.
Operation principle of the present utility model is: syndeton one end contacts with motor driving shaft; the driving shaft axle contacts with bearing inner race; the syndeton other end links to each other with the outer ring of bearing; thus; pass through syndeton; between motor driving shaft, bearing inner race, bearing outer ring, form a short circuit loop; the impedance in short circuit loop is very low; the electric weight of parasitic capacitance storage is released by this short circuit loop and can form the voltage that damages bearing at the motor-driven bearing; the galvanic corrosion phenomenon can not occur in bearing, and bearing is protected.
Above-mentioned execution mode only is preferred implementation of the present utility model; protection range of the present utility model is not imposed any restrictions; those of ordinary skills are not breaking away from distortion and the retouching of doing under the enlightenment of the utility model essence and technology; all should be considered as within protection range of the present utility model, protection range of the present utility model is decided on its claims.
Claims (4)
1. the shaft voltage restraining device of slip ring motor, it is characterized in that, comprise two syndetons, one of them syndeton is installed in the motor-driven axle head, another syndeton is installed in motor nonpowered axle end, and described syndeton one end rolls with driving shaft and contacts other end connection bearing outer ring, form a closed-loop path between driving shaft, bearing inner race, bearing outer ring and syndeton, two syndetons form parallel connection and ground connection at circuit.
2. the shaft voltage restraining device of described slip ring motor according to claim 1 is characterized in that, the syndeton of described nonpowered axle end is arranged within the slip ring room.
3. the shaft voltage restraining device of described slip ring motor according to claim 1 is characterized in that, described syndeton directly is connected with described bearing outer ring, perhaps the parts that directly link to each other of indirect joint and bearing outer ring.
4. the shaft voltage restraining device of described slip ring motor according to claim 1 is characterized in that, described syndeton is grounding carbon brush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220354060XU CN202889117U (en) | 2012-07-20 | 2012-07-20 | Shaft voltage inhibiting device for slip ring motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220354060XU CN202889117U (en) | 2012-07-20 | 2012-07-20 | Shaft voltage inhibiting device for slip ring motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202889117U true CN202889117U (en) | 2013-04-17 |
Family
ID=48080505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220354060XU Expired - Lifetime CN202889117U (en) | 2012-07-20 | 2012-07-20 | Shaft voltage inhibiting device for slip ring motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202889117U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474492A (en) * | 2014-12-01 | 2019-11-19 | 三菱电机株式会社 | The rotor and rotating electric machine of rotating electric machine |
| WO2022121807A1 (en) * | 2020-12-08 | 2022-06-16 | 华为数字能源技术有限公司 | Motor, power assembly, and vehicle |
-
2012
- 2012-07-20 CN CN201220354060XU patent/CN202889117U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474492A (en) * | 2014-12-01 | 2019-11-19 | 三菱电机株式会社 | The rotor and rotating electric machine of rotating electric machine |
| WO2022121807A1 (en) * | 2020-12-08 | 2022-06-16 | 华为数字能源技术有限公司 | Motor, power assembly, and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |