CN101699735A - Big power electromagnetic compatible switch - Google Patents
Big power electromagnetic compatible switch Download PDFInfo
- Publication number
- CN101699735A CN101699735A CN200710191579A CN200710191579A CN101699735A CN 101699735 A CN101699735 A CN 101699735A CN 200710191579 A CN200710191579 A CN 200710191579A CN 200710191579 A CN200710191579 A CN 200710191579A CN 101699735 A CN101699735 A CN 101699735A
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- interference
- switch
- power supply
- electromagnetic
- radiation
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Abstract
The invention provides a big power electromagnetic compatible switch. The switch comprises an electric circuit, a power supply and a device. The invention adopts a soft-switching technique that: firstly, interference factors are directly eliminated by inhibiting an interference source; secondly, coupling and radiation between the interference source and the interfered equipment are eliminated so as to cut off the transmission route of the electromagnetic interference; and thirdly, the anti-interference ability of the interfered equipment is improved, the sensibility of the interfered equipment on noise is lowered, switch loss and switch noise are reduced. A buffer circuit is added to an input part of the switch control power supply, an EMI filter is added to an input and output circuit of the switch power supply, materials with good electric conductivity are used to shield electric fields, materials with high magnetic conductivity are used to shield magnetic fields, various measures are taken to achieve good anti-interference effects, so that the power switch is capable of resisting the electromagnetic interference and particularly meets related EMC standards in terms of lightning strike, surge, mains voltage, electric fields, magnetic fields, electromagnetic wave, static discharge, pulse train, voltage dip, RF electromagnetic field conduction anti-interference, radiation anti-interference, conduction emission, radiation emission and the like.
Description
Technical field
The present invention relates to a kind of apparatus of power supply, especially a kind of apparatus of Switching Power Supply.
Background technology
Switching Power Supply generally all adopts pulse width modulation (PWM) technology, be characterized in the frequency height, the efficient height, the power density height, the reliability height, also have volume little in addition, in light weight, have advantages such as remote monitoring, therefore be widely used in programme-controlled exchange, the light transfer of data, the wireless base station, in cable television system and the IP network, it is the core drive of Information Technology Equipment operate as normal, yet, because its switching device is operated in the high frequency on off operating mode, the fast transient process of high frequency itself is exactly electromagnetic interference (EMD) source, the electromagnetic interference EMI signal that he produces has very wide frequency range, certain amplitude is arranged again, pollute electromagnetic environment through conduction and radiation meeting, communication equipment and electronic product are caused interference, because of the existence of disturbing, the electrical network of input power supply has been subjected to interference, has influence on miscellaneous equipment, it can not be worked normally, also have influence on the power supply quality of electrical network.
Summary of the invention
The present invention is directed to the defective of prior art, a kind of apparatus of glitch-free Switching Power Supply is provided.
To achieve these goals, the present invention takes following measure to realize:
A kind of apparatus of Switching Power Supply, comprise circuit, power supply, device, it is characterized in that at first suppressing interference source, directly eliminate cause of failures, next is coupling and the radiation of eliminating between interference source and the disturbed equipment, the route of transmission that cuts off electromagnetic interference, and the 3rd is the interference rejection ability that improves disturbed equipment, reduce its susceptibility to noise, reduce the soft switch technique of switching loss and switching noise, add buffer circuit, in Switching Power Supply input and output circuit, install electromagnetic interface filter additional in the importation of switch control power supply, the good material of available conduction is to electric field shielding, and with the high material of permeability to magnetic field shielding.
The present invention has following characteristics with respect to prior art: the present invention adopts multiple measure to reach good anti-interference effect, make mains switch have the ability of anti-electromagnetic interference, particularly thunderbolt, surge, line voltage, electric field, magnetic field, electromagnetic wave, static discharge, pulse train, electric voltage dropping, radio frequency electromagnetic field are conducted the regulation that projects such as vulnerability to jamming, radiation vulnerability to jamming, conduction emission, radiated emission need satisfy relevant EMC standard.
Embodiment
Reduce the soft switch technique of switching loss and switching noise, the implementation method of soft switch is, in primary circuit, increase small inductor, resonant elements such as electric capacity, before and after switching process, introduce resonance, eliminate voltage, electric current overlapping, importation at switch control power supply adds buffer circuit, it is made up of linear impedance stabilization network, be used to eliminate power line interference, the electricity fast transient, surge, voltage just changes and potential interference such as power line harmonic wave, installing electromagnetic interface filter additional in Switching Power Supply input and output circuit, is to suppress one of the conduction emission very effective ways.
In the reality, the present invention can well defend the interference of electromagnetism, thereby guarantees the normal operation of circuit.
Claims (1)
1. the apparatus of a Switching Power Supply, comprise circuit, power supply, device, it is characterized in that at first suppressing interference source, directly eliminate cause of failures, next is coupling and the radiation of eliminating between interference source and the disturbed equipment, the route of transmission that cuts off electromagnetic interference, and the 3rd is the interference rejection ability that improves disturbed equipment, reduce its susceptibility to noise, reduce the soft switch technique of switching loss and switching noise, add buffer circuit, in Switching Power Supply input and output circuit, install electromagnetic interface filter additional in the importation of switch control power supply, the good material of available conduction is to electric field shielding, and with the high material of permeability to magnetic field shielding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710191579A CN101699735A (en) | 2007-12-13 | 2007-12-13 | Big power electromagnetic compatible switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710191579A CN101699735A (en) | 2007-12-13 | 2007-12-13 | Big power electromagnetic compatible switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101699735A true CN101699735A (en) | 2010-04-28 |
Family
ID=42148182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710191579A Pending CN101699735A (en) | 2007-12-13 | 2007-12-13 | Big power electromagnetic compatible switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101699735A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780524A (en) * | 2012-10-19 | 2014-05-07 | 意法半导体公司 | System and method for a power line modem |
| CN109655691A (en) * | 2018-12-25 | 2019-04-19 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Power device degeneration monitoring method, device and system in board-level circuit |
-
2007
- 2007-12-13 CN CN200710191579A patent/CN101699735A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780524A (en) * | 2012-10-19 | 2014-05-07 | 意法半导体公司 | System and method for a power line modem |
| CN103780524B (en) * | 2012-10-19 | 2019-07-05 | 意法半导体公司 | System and method for power line modem |
| US10581487B2 (en) | 2012-10-19 | 2020-03-03 | Stmicroelectronics, Inc. | Method of communicating internet-based data |
| US10581488B2 (en) | 2012-10-19 | 2020-03-03 | Stmicroelectronics, Inc. | Internet-enabled appliance |
| CN109655691A (en) * | 2018-12-25 | 2019-04-19 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Power device degeneration monitoring method, device and system in board-level circuit |
| CN109655691B (en) * | 2018-12-25 | 2021-01-22 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Method, device and system for monitoring degradation of power device in board-level circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100428 |