CN102594120A - High-power EMI (Electromagnetic Interference) filter - Google Patents
High-power EMI (Electromagnetic Interference) filter Download PDFInfo
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- CN102594120A CN102594120A CN2012100207135A CN201210020713A CN102594120A CN 102594120 A CN102594120 A CN 102594120A CN 2012100207135 A CN2012100207135 A CN 2012100207135A CN 201210020713 A CN201210020713 A CN 201210020713A CN 102594120 A CN102594120 A CN 102594120A
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Abstract
The invention discloses a high-power EMI (Electromagnetic Interference) filter. The high-power EMI filter comprises three phase current output load ends and three phase current input ends, wherein a differential mode inductor L1, a common mode inductor L2 and a common mode inductor L3 are connected between each of the three phase current output load ends and each of the three phase current input ends in series in sequence; the differential mode inductor L1 is connected with a differential mode capacitor C1X and a common mode capacitor C1Y to form a first-order filter; the common mode inductor L2 is connected with a differential mode capacitor C2X and a common mode capacitor C2Y to form a second-order filter; the common mode inductor L3 is connected with a differential mode capacitor C3X and a common mode capacitor C3Y to form a third-order filter; the differential mode capacitors C1X, C2X and C3X are bridged between a phase line and a neutral line; and the common mode capacitors C1Y, C2Y and C3Y are bridged between the neutral line and a ground line. According to the high-power EMI filter, the performance and safety of the filter under high current can be guaranteed, and EMC (Electromagnetic Compatibility) filtering in high-current and high-power systems can be met.
Description
Technical field
The present invention relates to a kind of filter, relate in particular to a kind of high-power electromagnetic interface filter.
Background technology
Along with the non-linear equipment that is the basis with the modern power electronic device uses in a large number, Switching Power Supply for example, frequency converters etc. inject a large amount of radio-frequency components to electrical network, pollute electrical network, disturb the neighbouring device operate as normal.Especially for solar energy in the present new forms of energy, the current transformer that wind energy is used, and network process in, if do not handle the EMI problem, then have a large amount of radio-frequency components and cause equipment fault, the damage problem.
Frequency signal access arrangement when the low-pass filter circuit that electromagnetic interface filter is made up of series reactor and shunt capacitor usually, its effect are permission equipment operate as normal, and the interference signal of high frequency is had bigger inhibition.Had a large amount of filters using in the market, but be mainly single-phase, little electric current (tens peaces) filter.Since wind energy, inverter output currents such as solar energy, and voltage contains radio-frequency component; Inverter power is constantly being done greatly simultaneously, and therefore, existing filter can not satisfy photovoltaic well; Wind power generation, track traffic, charging pile; And the filtering demand in high-power industrial drives field, therefore, be necessary to provide high-power electromagnetic interface filter.
Summary of the invention
Technical problem to be solved by this invention provides a kind of high-power electromagnetic interface filter; Electromagnetic interference noise when not only effectively reducing inverter and being incorporated into the power networks is avoided power grid environment is polluted, and can be guaranteed the performance and the safety of filter under the big electric current; Satisfy big electric current, the EMC filtering in the high-power system.
The present invention solves the problems of the technologies described above the technical scheme that adopts to provide a kind of high-power electromagnetic interface filter; Comprise three-phase current output loading end and three-phase current input; Wherein, be in series with differential mode inductance L1, common mode inductance L2 and common mode inductance L3 between every phase current output loading end and the input successively; Said differential mode inductance L1 links to each other with differential mode capacitor C1X, common mode capacitance C1Y and forms the first rank filter; Said common mode inductance L2 links to each other with differential mode capacitor C2X, common mode capacitance C2Y and forms the second rank filter; Said common mode inductance L3 links to each other with differential mode capacitor C3X, common mode capacitance C3Y and forms the 3rd rank filter; Said differential mode capacitor C1X, C2X and C3X are connected across between phase line and the center line, and said common mode capacitance C1Y, C2Y and C3Y are connected across between center line and the ground wire.
Above-mentioned high-power electromagnetic interface filter, wherein, the common mode inductance L3 front end of every circuitry phase links to each other with differential mode capacitor C4X and forms filter circuit, and said differential mode capacitor C4X is connected across between phase line and the center line.
Above-mentioned high-power electromagnetic interface filter, wherein, differential mode capacitor C1X, C2X, C3X and C4X in the three-phase circuit are Y-connection.
The present invention contrasts prior art has following beneficial effect: high-power electromagnetic interface filter provided by the invention; Through three rank filter circuits being set, progressively weaken to get into the electric network electromagnet noise, the electromagnetic interference noise when effectively reducing inverter and being incorporated into the power networks at three-phase current output loading end and three-phase current input; Avoid power grid environment is polluted; The filtering of every rank effectively avoids the magnetic material heating saturated to the characteristics filtering of inverter, thereby guarantees the performance and the safety of filter under the big electric current.
Description of drawings
Fig. 1 is the high-power electromagnetic interface filter circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further description.
Fig. 1 is the high-power electromagnetic interface filter circuit diagram of the present invention.
See also Fig. 1, high-power electromagnetic interface filter provided by the invention comprises three-phase current output loading end and three-phase current input, wherein, is in series with differential mode inductance L1, common mode inductance L2 and common mode inductance L3 between every phase current output loading end and the input successively; Said differential mode inductance L1 links to each other with differential mode capacitor C1X, common mode capacitance C1Y and forms the first rank filter; Said common mode inductance L2 links to each other with differential mode capacitor C2X, common mode capacitance C2Y and forms the second rank filter; Said common mode inductance L3 links to each other with differential mode capacitor C3X, common mode capacitance C3Y and forms the 3rd rank filter; Said differential mode capacitor C1X, C2X and C3X are connected across between phase line and the center line, and said common mode capacitance C1Y, C2Y and C3Y are connected across between center line and the ground wire PE.
High-power electromagnetic interface filter provided by the invention, wherein, the common mode inductance L3 front end of every circuitry phase links to each other with differential mode capacitor C4X and forms filter circuit, and said differential mode capacitor C4X is connected across between phase line and the center line.
High-power electromagnetic interface filter provided by the invention, signal flow are to as follows: the three-phase current input is In1, In2 and In3, and three-phase current output loading end is Out1, Out2 and Out3; Electromagnetic interference noise gets into filter circuit by load end; C1X electric capacity filtering DM EMI, C1Y filtering common mode disturbances, L1 is a differential mode inductance; Reflection also absorbs the differential mode electromagnetic noise, more than is preliminary filtering.Electromagnetic noise again by C2YI electric capacity, gets into the further filtering common mode disturbances of L2 common mode inductance noise behind the C2X capacitor filtering after preliminary filtering.And then entering C3Y electric capacity, C3X electric capacity, L3 common mode inductance, C4X capacitor filtering.More than constitute filter three rank filtering measure.Differential mode capacitor C1X, C2X, C3X and C4X in the three-phase circuit are Y-connection; Each electric capacity two ends is parallel with resistance, and (capacitor C 4X two ends can parallel resistance; But decide according to capacitance size, mainly be to consider the capacitance discharges time), launch no longer one by one to detail at this; Electric current is up to 2500A, the highest 690VAC of voltage.
Since wind energy, inverter output currents such as solar energy, and voltage contains radio-frequency component; Simultaneously inverter power is constantly being done greatly, and the present invention adopts three rank filtering, the electromagnetic interference noise in the time of not only can effectively reducing inverter and be incorporated into the power networks; Avoid power grid environment is polluted, and the entering of weakening step by step electric network electromagnet noise, the filtering of every rank all is directed against the characteristics filtering of inverter; Effectively avoid the magnetic material heating saturated, thereby guarantee the performance and the safety of filter under the big electric current.Adopt common mode inductance in the whole filter three rank filtering, differential mode inductance is reasonably combined, realizes the optimum filtering effect, practices thrift cost.
High-power electromagnetic interface filter provided by the invention all adopts copper bus-bar to come bearing great current as conductor, filter power consumption, and it is very little to generate heat, and overload capacity is strong; Select for use the overhang insulation working of plastics of high insulation also to guarantee enough insulation distances and dielectric strength simultaneously.
Though the present invention discloses as above with preferred embodiment; Right its is not that any those skilled in the art are not breaking away from the spirit and scope of the present invention in order to qualification the present invention; When can doing a little modification and perfect, so protection scope of the present invention is when being as the criterion with what claims defined.
Claims (3)
1. a high-power electromagnetic interface filter comprises three-phase current output loading end and three-phase current input, it is characterized in that, is in series with differential mode inductance L1, common mode inductance L2 and common mode inductance L3 between every phase current output loading end and the input successively; Said differential mode inductance L1 links to each other with differential mode capacitor C1X, common mode capacitance C1Y and forms the first rank filter; Said common mode inductance L2 links to each other with differential mode capacitor C2X, common mode capacitance C2Y and forms the second rank filter; Said common mode inductance L3 links to each other with differential mode capacitor C3X, common mode capacitance C3Y and forms the 3rd rank filter; Said differential mode capacitor C1X, C2X and C3X are connected across between phase line and the center line, and said common mode capacitance C1Y, C2Y and C3Y are connected across between center line and the ground wire.
2. high-power electromagnetic interface filter as claimed in claim 1 is characterized in that, the common mode inductance L3 front end of every circuitry phase links to each other with differential mode capacitor C4X and forms filter circuit, and said differential mode capacitor C4X is connected across between phase line and the center line.
3. high-power electromagnetic interface filter as claimed in claim 1 is characterized in that, differential mode capacitor C1X, C2X, C3X and C4X in the three-phase circuit are Y-connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210020713.5A CN102594120B (en) | 2012-01-30 | 2012-01-30 | High-power electromagnetic interface filter |
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| CN201210020713.5A CN102594120B (en) | 2012-01-30 | 2012-01-30 | High-power electromagnetic interface filter |
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| CN102594120A true CN102594120A (en) | 2012-07-18 |
| CN102594120B CN102594120B (en) | 2016-05-25 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103078481A (en) * | 2013-01-29 | 2013-05-01 | 西安龙腾新能源科技发展有限公司 | Input and output voltage fluctuation suppressing circuit |
| CN104811022A (en) * | 2015-05-11 | 2015-07-29 | 永济新时速电机电器有限责任公司 | Auxiliary converter and vehicle |
| CN105406695A (en) * | 2014-08-27 | 2016-03-16 | 华为技术有限公司 | Switch power filtering circuit |
| CN107437800A (en) * | 2016-05-27 | 2017-12-05 | 比亚迪股份有限公司 | Vehicle-mounted filter, vehicle-mounted charging equipment and vehicle |
| CN107819397A (en) * | 2017-12-06 | 2018-03-20 | 浙江大学 | Input filter and its method to set up include the frequency converter of the input filter |
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| JP2011244418A (en) * | 2010-04-19 | 2011-12-01 | Mitsubishi Electric Corp | Common mode noise filter, signal transmission cable and cable relay connector |
| CN102307009A (en) * | 2011-07-11 | 2012-01-04 | 深圳市伟创电气有限公司 | EMI filter circuit |
| CN202455074U (en) * | 2012-01-30 | 2012-09-26 | 苏州腾冉电气设备有限公司 | High-power emi filter |
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| CN201238083Y (en) * | 2008-08-06 | 2009-05-13 | 四川九洲电器集团有限责任公司 | Power cord with power supply noise filter |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103078481A (en) * | 2013-01-29 | 2013-05-01 | 西安龙腾新能源科技发展有限公司 | Input and output voltage fluctuation suppressing circuit |
| CN103078481B (en) * | 2013-01-29 | 2015-06-10 | 西安龙腾新能源科技发展有限公司 | Input and output voltage fluctuation suppressing circuit |
| CN105406695A (en) * | 2014-08-27 | 2016-03-16 | 华为技术有限公司 | Switch power filtering circuit |
| CN105406695B (en) * | 2014-08-27 | 2018-03-16 | 华为技术有限公司 | A kind of Switching Power Supply filter circuit |
| CN104811022A (en) * | 2015-05-11 | 2015-07-29 | 永济新时速电机电器有限责任公司 | Auxiliary converter and vehicle |
| CN107437800A (en) * | 2016-05-27 | 2017-12-05 | 比亚迪股份有限公司 | Vehicle-mounted filter, vehicle-mounted charging equipment and vehicle |
| CN107437800B (en) * | 2016-05-27 | 2020-07-10 | 比亚迪股份有限公司 | Vehicle-mounted filtering device, vehicle-mounted charging equipment and vehicle |
| CN107819397A (en) * | 2017-12-06 | 2018-03-20 | 浙江大学 | Input filter and its method to set up include the frequency converter of the input filter |
| CN107819397B (en) * | 2017-12-06 | 2023-11-28 | 浙江大学 | Input filter, setting method thereof and frequency converter comprising input filter |
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| CN102594120B (en) | 2016-05-25 |
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