CN103516143A - Shaft current eliminating device - Google Patents
Shaft current eliminating device Download PDFInfo
- Publication number
- CN103516143A CN103516143A CN201310503532.2A CN201310503532A CN103516143A CN 103516143 A CN103516143 A CN 103516143A CN 201310503532 A CN201310503532 A CN 201310503532A CN 103516143 A CN103516143 A CN 103516143A
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- China
- Prior art keywords
- shaft current
- eliminating device
- conducting ring
- motor
- bearing
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Abstract
The invention relates to a shaft current eliminating device. The device comprises a motor spindle, a conducting ring, a bearing outer cover and a connecting bracket, wherein the conducting ring is mounted on the motor spindle in a sleeving way and connected with the bearing outer cover through the connecting bracket; one circle of ultrafine wear-resistant conducting fibers is arranged on the conducting ring. The shaft current eliminating device has a simple, compact and reasonable structure; shaft current generated by a frequency converter to a variable frequency motor can be directly conducted away by the shaft current eliminating device without forming backflow through a bearing, so that the bearing is prevented from being damaged and the motor is protected; the structure and the mounting manner of the original variable frequency motor are not needed to be changed, so that the replacement and the detachment are convenient, the cost is reduced, the working efficiency is improved, and the performance is reliable; the shaft current eliminating device can be widely applied to variable frequency driving motors and alternating current motors.
Description
Technical field
The present invention relates to a kind of elimination shaft current device, for variable frequency drive motors and alternating current machine occasion; Efficiently and effectively has been protected motor bearings.
Background technology
Frequency conversion drive is the trend of technical development, saved the energy, but the key of popularization converter technique is how to avoid the electrical damage of bearing in the time of because of its high-performance operation.Because its power supply of variable-frequency motor is non-sinusoidal wave power (square wave), its high order harmonic component damages the oil film between axle and bearing, and bearing will current flowing, thereby affects the life-span of bearing.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point, a kind of elimination shaft current device be provided,
This device can improve high frequency shaft current release efficiency, by numerous electric current Releasing loop, effectively leads away shaft current, can protect motor bearings by efficiently and effectively.
According to technical scheme provided by the invention, a kind of elimination shaft current device, comprises electric machine main shaft, conducting ring, bearing end cover and connection bracket, is set with a conducting ring on described electric machine main shaft, and conducting ring is connected with bearing end cover by connection bracket.
As a further improvement on the present invention, on described conducting ring, be provided with the ultra-fine wear-resisting conductive fiber of a circle.
Compared with the prior art the present invention has the following advantages: the present invention is simple, compact and reasonable for structure; The shaft current that can make frequency converter produce variable-frequency motor is directly led away by this device, rather than forms backflow by bearing, can avoid bearing damage, thus protection motor; Need not change structure and the mounting means of original variable-frequency motor, change and tear open conveniently, can be cost-saving, dependable performance.
Accompanying drawing explanation
Fig. 1 is structural front view of the present invention.
Fig. 2 is structure left view of the present invention.
Embodiment
The present invention is below further described in connection with the embodiment in accompanying drawing:
As shown in Figure 1, comprise electric machine main shaft 1, conducting ring 2, bearing end cover 3, bolt 4, connection bracket 5.On described electric machine main shaft 1, be set with a conducting ring 2, conducting ring 2 is connected with bearing end cover 3 by support 5, adopts bolt 4 fastening.On described conducting ring 2, be provided with the ultra-fine wear-resisting conductive fiber of a circle.
The present invention, by increase the ultra-fine wear-resisting conductive fiber of a circle on a metallic conduction ring, sets up an electric discharge bypass that impedance is low, reliability is high between motor shaft and motor housing, effectively leads away shaft current, and efficiently and effectively has been protected motor bearings.
The present invention has improved high frequency shaft current release efficiency greatly, and by numerous electric current Releasing loop, conducting ring is successfully walked around bearing by shaft current.Need not change structure and the mounting means of original variable-frequency motor, change and tear open conveniently, can be cost-saving, increase work efficiency, and dependable performance; Can be widely used in variable frequency drive motors and alternating current machine.
Claims (2)
1. eliminate shaft current device for one kind, comprise electric machine main shaft (1), bearing end cover (3) and connection bracket (5), it is characterized in that: the upper suit of described electric machine main shaft (1) conducting ring (2), conducting ring (2) is connected with bearing end cover (3) by connection bracket (5).
2. a kind of elimination shaft current device as claimed in claim 1, is characterized in that: on described conducting ring (2), be provided with a circle conductive fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310503532.2A CN103516143A (en) | 2013-10-23 | 2013-10-23 | Shaft current eliminating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310503532.2A CN103516143A (en) | 2013-10-23 | 2013-10-23 | Shaft current eliminating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103516143A true CN103516143A (en) | 2014-01-15 |
Family
ID=49898367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310503532.2A Pending CN103516143A (en) | 2013-10-23 | 2013-10-23 | Shaft current eliminating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103516143A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787456A (en) * | 2016-12-19 | 2017-05-31 | 四川宏华电气有限责任公司 | A kind of method for weakening hollow shaft current influence |
| CN109155573A (en) * | 2016-09-06 | 2019-01-04 | 宝马股份公司 | driving device for motor vehicle |
| CN112572144A (en) * | 2020-12-08 | 2021-03-30 | 华为技术有限公司 | Motor, power assembly and vehicle |
| CN113949220A (en) * | 2021-09-15 | 2022-01-18 | 浙江中车尚驰电气有限公司 | Plug screw formula axle current protection electric installation |
| CN114039444A (en) * | 2021-10-27 | 2022-02-11 | 浙江吉利控股集团有限公司 | Motor and vehicle |
| EP4020774A1 (en) * | 2020-12-25 | 2022-06-29 | Huawei Digital Power Technologies Co., Ltd. | Motor rotor, motor, and vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202178665U (en) * | 2011-09-01 | 2012-03-28 | 桂林电器科学研究院 | Current eliminating device of motor shaft |
| CN202488122U (en) * | 2012-02-21 | 2012-10-10 | 山西防爆电机（集团）有限公司 | Current grounding device for motor shaft |
| CN102857014A (en) * | 2012-09-17 | 2013-01-02 | 西安正麒电气有限公司 | Motor insulation bearing chamber |
| CN203554209U (en) * | 2013-10-23 | 2014-04-16 | 中达电机股份有限公司 | A shaft current eliminating device |
-
2013
- 2013-10-23 CN CN201310503532.2A patent/CN103516143A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202178665U (en) * | 2011-09-01 | 2012-03-28 | 桂林电器科学研究院 | Current eliminating device of motor shaft |
| CN202488122U (en) * | 2012-02-21 | 2012-10-10 | 山西防爆电机（集团）有限公司 | Current grounding device for motor shaft |
| CN102857014A (en) * | 2012-09-17 | 2013-01-02 | 西安正麒电气有限公司 | Motor insulation bearing chamber |
| CN203554209U (en) * | 2013-10-23 | 2014-04-16 | 中达电机股份有限公司 | A shaft current eliminating device |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109155573A (en) * | 2016-09-06 | 2019-01-04 | 宝马股份公司 | driving device for motor vehicle |
| US10840779B2 (en) | 2016-09-06 | 2020-11-17 | Bayerische Motoren Werke Aktiengesellschaft | Drive device for a motor vehicle |
| CN109155573B (en) * | 2016-09-06 | 2021-10-08 | 宝马股份公司 | Drive device for a motor vehicle and motor vehicle |
| CN106787456A (en) * | 2016-12-19 | 2017-05-31 | 四川宏华电气有限责任公司 | A kind of method for weakening hollow shaft current influence |
| CN106787456B (en) * | 2016-12-19 | 2018-10-30 | 四川宏华电气有限责任公司 | A method of weakening hollow shaft current influences |
| CN112572144A (en) * | 2020-12-08 | 2021-03-30 | 华为技术有限公司 | Motor, power assembly and vehicle |
| CN112572144B (en) * | 2020-12-08 | 2023-03-10 | 华为数字能源技术有限公司 | Motor, power assembly and vehicle |
| EP4020774A1 (en) * | 2020-12-25 | 2022-06-29 | Huawei Digital Power Technologies Co., Ltd. | Motor rotor, motor, and vehicle |
| US11863029B2 (en) | 2020-12-25 | 2024-01-02 | Huawei Digital Power Technologies Co., Ltd. | Motor rotor, motor, and vehicle |
| CN113949220A (en) * | 2021-09-15 | 2022-01-18 | 浙江中车尚驰电气有限公司 | Plug screw formula axle current protection electric installation |
| CN113949220B (en) * | 2021-09-15 | 2023-11-03 | 浙江中车尚驰电气有限公司 | Screw plug type shaft current protection conductive device |
| CN114039444A (en) * | 2021-10-27 | 2022-02-11 | 浙江吉利控股集团有限公司 | Motor and vehicle |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140115 |