CN2482269Y - Three-phase input filter unit for switch power supply - Google Patents
Three-phase input filter unit for switch power supply Download PDFInfo
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- CN2482269Y CN2482269Y CN 00268508 CN00268508U CN2482269Y CN 2482269 Y CN2482269 Y CN 2482269Y CN 00268508 CN00268508 CN 00268508 CN 00268508 U CN00268508 U CN 00268508U CN 2482269 Y CN2482269 Y CN 2482269Y
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Abstract
The utility model discloses a three-phase input filtration device for a switch power supply, and the device consists of two common-mode inductances, a first grade common-mode capacitance, a second grade differential-mode capacitor, and a power break-down and discharge resistor. The input terminals of the three-phase inlet wire A1, B1, and C1 pass through the X capacitance CX11, CX12, and CX13, the common-mode inductance L1, the Y capacitance CY1, CY2 and CY3, the common-mode inductance L2, the X capacitance CX21, CX22, and CX23 in sequence, and finally reaches the output terminal of the input filtration device. Compared with the prior art, the utility model has the advantages that the structure is neat, the component part quantity is decreased, and the cost is reduced, the utility model can be used on all manner of power devices with three-phase input.
Description
The utility model relates to field of power supplies, relates in particular to the three-phase input filter in the Switching Power Supply.
Along with development of electronic technology, more and more stricter to electromagnetic compatibility (EMC) performance requirement of the Switching Power Supply that is used to fields such as communicating by letter.And the input filtering technique is exactly to improve one of the main method of the EMC performance of Switching Power Supply.And the continuous increase of power supply single power, adopting the three-phase input mode has been a kind of trend.Existing three-phase input filter, shown in Figure 1 is a kind of typical circuit principle schematic of existing filter, mainly comprises: the common point of two common mode inductances, two-stage common mode capacitance, three grades of differential mode electric capacity, three grades of differential mode electric capacity is to three common mode capacitance on ground.Its connected mode is: three-phase inlet wire input A1, B1, C1 pass through X capacitor C X11, CX12, CX13 successively, common mode inductance L1, X capacitor C X21, CX22, CX23, Y capacitor C Y1, CY2, CY3, common mode inductance L2, X capacitor C X31, CX32, CX33, Y capacitor C Y7～CY9 arrives the output of importing filter at last.X capacitor C X11, CX12 and CX13, CX21, CX22 and CX23, CX31, CX32 and CX33 respectively have a common point, and common point meets common mode capacitance CY4, CY5, CY6 respectively to ground.Existing three-phase input filter, complex structure, used components and parts are more.Common mode capacitance CY7, CY8, CY9 as differential mode capacitor CX21, CX22, CX23 and output port among Fig. 1 will use a plurality of electric capacity, and be connected on the differential mode capacitor common point to ground capacitor C Y4, CY5, CY6, because the impossible complete equipilibrium of three-phase voltage, unbalanced electric current will be by this loop, electric capacity inflow place, produce and disturb, influence the filter effect of three-phase input filter.When this electric capacity appeared at the input of filter, as the CY4 among Fig. 1, the interference effect of its generation was bigger.
Fig. 2 is the typical circuit principle schematic of another kind of filter in the prior art, has compared to Figure 1 used the one-level differential mode inductance more, mainly comprises: two common mode inductances, two-stage common mode capacitance, three grades of differential mode electric capacity and differential mode inductances.Its connected mode is: three-phase inlet wire input A1, B1, C1 pass through X capacitor C X11, CX12, CX13 successively, common mode inductance L1, X capacitor C X21, CX22, CX23, Y capacitor C Y1, CY2, CY3, common mode inductance L2, X capacitor C X31, CX32, CX33, differential mode inductance L3, L4, L5, Y capacitor C Y7～CY9 arrives the output of importing filter at last.X capacitor C X11, CX12 and CX13, CX21, CX22 and CX23, CX31, CX32 and CX33 respectively have a common point.
This shows, filter of the prior art, complex structure, used components and parts are many, the cost height.Because the impossible complete equipilibrium of three-phase voltage, unbalanced electric current will produce and disturb by loop, electric capacity inflow place, can not get good filter effect.
The utility model provides that a kind of Switching Power Supply three-phase input filter has solved that the filter effect that exists in the prior art is poor, the problem of complex structure, used components and parts, and can save cost.
A kind of three-phase input filter of Switching Power Supply comprises: inductance L 1, L2, X capacitor C X11, CX12, CX13, CX21, CX22, CX23 and Y capacitor C Y1, CY2, CY3 and resistance R 1, R2, R3, R4, R5, R6.
Wherein, 6 X electric capacity equate that 3 Y electric capacity are identical; Inductance L 1, L2 are common mode inductance, and L1, L2 adopt the core material-Mn-Zn ferrite of high permeability.Resistance R 1, R2, R3, R4, R5, R6 also equate.
The three-phase alternating current input port A1 of described filter, B1, C1 link to each other with three phase lines of electrical network respectively, and G is a ground wire, joins with the earth; A1, B1, C1 are connected to the end of X capacitor C X11, CX12, CX13 and " 1 ", " 3 ", " 5 " end of common mode inductance L1 respectively, X capacitor C X11, CX12, CX13, adopt star-like connected mode, its other end is connected together, common point is M, perhaps X capacitor C X11, CX12, CX13 adopt the triangular form connected mode, and each electric capacity is connected across respectively between A1 and B1, B1 and C1, C1 and the A1 two-phase; " 2 " of common mode inductance L1, " 4 ", " 6 " end pass through the end of Y capacitor C Y1, CY2, CY3 respectively and link to each other CY1, CY2, CY3 other end ground connection with " 1 ", " 3 ", " 5 " end of common mode inductance L 2; " 2 " of common mode inductance L2, " 4 ", " 6 " end link to each other with the end of X capacitor C X21, CX22, CX23 respectively, X capacitor C X21, CX22, CX23, adopt star-like connected mode, its other end is connected together, common point is N, perhaps X capacitor C X11, CX22, CX23 adopt the triangular form connected mode, and each electric capacity is connected across respectively between A2 and B2, B2 and C2, C2 and the A2 two-phase; Hold through behind one group of outage discharge resistance R1～R6 " 2 " of common mode inductance L2, " 4 ", " 6 ", is connected to output terminals A 2, B2, the C2 of filter respectively; " 1,2 " of common mode inductance, " 3,4 " and " 5,6 " are a winding; " 1 " of common mode inductance, " 3 ", " 5 " are one group of end of the same name, and end of the same name is organized for another in " 2 ", " 4 ", " 6 "; Outage discharge resistance R1～R6 takes the triangular form connected mode, and promptly resistance R 1 is connected with R2, and cross-over connection is between A2 and B2 two-phase, and resistance R 3 is connected with R4, and cross-over connection is between B2 and C2 two-phase, and resistance R 5 is connected with R6, and cross-over connection is between C2 and A2 two-phase;
Output port A2, the B2 of described filter, C2 are connected to the ac input end of the three-phase commutation bridge of Switching Power Supply inside.
The input of described filter, output is symmetry fully, and input, output are used interchangeably.
Adopt described filter, saved the differential mode capacitor between the common mode inductance, saved 2 common mode capacitance of M, N, and no longer needed differential mode inductance, simplified circuit, reduced components and parts, provide cost savings to ground and filter output port.Save M, N at 2 and behind the electric capacity on ground, also reduced disturbance current, suppress effects of jamming and obviously improve owing to loop, three-phase imbalance inflow place.
Described filter is on structural design, input, output is symmetry fully, and input, output are used interchangeably, and can suppress the inner electromagnetic interference that produces of Switching Power Supply effectively, can also reduce Switching Power Supply to susceptibility, improve anti-jamming capacity from external electromagnetic interference.
Fig. 1 is a kind of typical circuit principle schematic of existing filter;
Fig. 2 is the typical circuit principle schematic of another kind of existing filter;
Fig. 3 is an input filter principle schematic of the present utility model;
Fig. 4 is an another kind of input filter schematic diagram described in the utility model;
Fig. 5 is the circuit diagram of an embodiment of the present utility model.
Describe in further detail implementing the utility model below in conjunction with accompanying drawing.
Fig. 3 is an input filter principle schematic of the present utility model.Comprise: two common mode inductances, one-level common mode capacitance, two-stage differential mode capacitor.Its connected mode is: three-phase inlet wire input A1, B1, C1 pass through X capacitor C X11, CX12, CX13 successively, common mode inductance L1, Y capacitor C Y1, CY2, CY3, common mode inductance L2, X capacitor C X21, CX22, CX23 arrive the output of importing filter at last.Compare with existing typical, filtered device (as shown in Figure 1 and Figure 2), removed the common mode capacitance, the differential mode capacitor between the common mode inductance, differential mode capacitor common point of differential mode inductance, the output port Y electric capacity to ground, simple for structure, component number reduces, cost reduces.
Fig. 4 is the distortion of input filter scheme of the present utility model, the i.e. distortion of Fig. 3.Be with the difference of Fig. 3, the method for attachment difference of differential mode capacitor, the method for attachment of the differential mode capacitor of Fig. 3 is a star, and the employing triangle of the differential mode capacitor of Fig. 4 connects.Be noted that: require the electric pressure of differential mode capacitor higher when adopting triangle to connect (Y-connection relatively).
As shown in Figure 5, comprising input A1, B1, C1, earth terminal E, output end vo+, Vo-; The input filter of forming by X capacitor C X11, CX12, CX13, common mode inductance L1, Y capacitor C Y1, CY2, CY3, common mode inductance L2, X capacitor C X21, CX22, CX23 and discharge resistance R1～R6; VB1 forms rectification circuit by rectifier bridge, will import three-phase alternating current and be converted to direct current; Filter inductance LP, filter capacitor C1 form the LC filter, can improve the power factor of circuit simultaneously; The inverter circuit of forming by four switching tube VT1～VT4 and switch transformer T; Rectification output filter.
The three-phase alternating voltage of input is held input from A1, B1, C1, passing through the end of X capacitor C X11, CX12, CX13 successively links to each other with " 1 ", " 3 ", " 5 " end of common mode inductance L 1, the other end of X capacitor C X11, CX12, CX13 is connected together, and common point is M; " 2 " of common mode inductance L1, " 4 ", " 6 " end pass through the end of Y capacitor C Y1～CY3 respectively and link to each other CY1～CY3 other end ground connection with " 1 ", " 3 ", " 5 " end of common mode inductance L 2; An end that passes through X capacitor C X21, CX22, CX23 is respectively held in " 2 " of common mode inductance L2, " 4 ", " 6 ", and (other end of X capacitor C X21, CX22, CX23 is connected together, and common point is N; " 1,2 " of common mode inductance, " 3,4 " and " 5,6 " are a winding; " 1 " of common mode inductance, " 3 ", " 5 " are one group of end of the same name, and end of the same name is organized for another in " 2 ", " 4 ", " 6 ".) three ac input ends being input to rectifier bridge VB1 carry out rectification, alternating voltage is become the direct voltage of pulsation, through becoming smoother direct voltage (LC filtering simultaneously can also be played the effect of correcting power factors) after the LC filtering, to inverter circuit level and smooth direct voltage is become pulse voltage again, high frequency switch transformer T step-down outputs to load RL through behind the full-wave rectifier filter at last.
Electromagnetic interference exists usually in two ways: common mode and differential mode interference.(for this reason, the differential mode inductance in the input filter can remove by the leakage inductance of differential mode or X capacitor C X11, CX12, CX13, CX21, CX22, CX23 and common mode inductance L1, L2 and because the asymmetric differential mode that produces becomes.) divide acting in conjunction, can suppress the differential mode interference that comes from electrical network or enter electrical network by the inner generation attempt of Switching Power Supply; By common mode or Y capacitor C Y1～CY3 and common mode inductance L1, L2 acting in conjunction, can suppress to come from electrical network or produce the common mode disturbances that attempt enters electrical network by Switching Power Supply is inner.The input and output side of input filter does not add common mode capacitance, satisfies the maximum mismatch principle, can also reduce the electromagnetic disturbance electric current in the earth-return.
The conduction of this filter and radiation disturbance test result all are lower than the B level limit value requirement of relevant criterion, and also have very big surplus.
Claims (3)
- The three-phase input filter of 1 one kinds of Switching Power Supplies, comprise: inductance L 1, L2, X capacitor C X11, CX12, CX13, CX21, CX22, CX23, Y capacitor C Y1, CY2, CY3, with resistance R 1, R2, R3, R4, R5, R6, it is characterized in that: the three-phase alternating current input port A1 of described filter, B1, C1 link to each other with three phase lines of electrical network respectively, G is a ground wire, joins with the earth; A1, B1, C1 are connected to the end of X capacitor C X11, CX12, CX13 and " 1 ", " 3 ", " 5 " end of common mode inductance L1 respectively, and X capacitor C X11, CX12, CX13 adopt star-like connected mode, and its other end is connected together, and common point is M; Perhaps X capacitor C X11, CX12, CX13 adopt the triangular form connected mode, and each electric capacity is connected across respectively between A1 and B1, B1 and C1, C1 and the A1 two-phase; " 2 " of common mode inductance L1, " 4 ", " 6 " end pass through the end of Y capacitor C Y1, CY2, CY3 respectively and link to each other CY1, CY2, CY3 other end ground connection with " 1 ", " 3 ", " 5 " end of common mode inductance L 2; " 2 " of common mode inductance L2, " 4 ", " 6 " end link to each other with the end of X capacitor C X21, CX22, CX23 respectively, and X capacitor C X21, CX22, CX23 adopt star-like connected mode, and its other end is connected together, and common point is N; Perhaps X capacitor C X11, CX22, CX23 adopt the triangular form connected mode, and each electric capacity is connected across respectively between A2 and B2, B2 and C2, C2 and the A2; Hold through behind one group of outage discharge resistance R1～R6 " 2 " of common mode inductance L2, " 4 ", " 6 ", is connected to output terminals A 2, B2, the C2 of filter respectively; " 1,2 " of common mode inductance, " 3,4 " and " 5,6 " are a winding; " 1 " of common mode inductance, " 3 ", " 5 " are one group of end of the same name, and end of the same name is organized for another in " 2 ", " 4 ", " 6 "; Outage discharge resistance R1～R6 takes the triangular form connected mode, and promptly resistance R 1 is connected with R2, and cross-over connection is between A2 and B2 two-phase, and resistance R 3 is connected with R4, and cross-over connection is between B2 and C2 two-phase, and resistance R 5 is connected with R6, and cross-over connection is between C2 and A2 two-phase;Output port A2, the B2 of described filter, C2 are connected to the ac input end of the three-phase commutation bridge of Switching Power Supply inside.
- The three-phase input filter of 2 Switching Power Supplies as claimed in claim 1, it is characterized in that: 6 X capacitor C X11, CX12, CX13, CX21, CX22, CX23 are identical, and 3 Y electric capacity are identical, inductance L 1, L2 is common mode inductance, and resistance R 1, R2, R3, R4, R5, R6 equate.
- The three-phase input filter of 3 Switching Power Supplies as claimed in claim 1, it is characterized in that: common mode inductance L1, L2 adopt the core material-Mn-Zn ferrite of high permeability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00268508 CN2482269Y (en) | 2000-12-28 | 2000-12-28 | Three-phase input filter unit for switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00268508 CN2482269Y (en) | 2000-12-28 | 2000-12-28 | Three-phase input filter unit for switch power supply |
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| CN2482269Y true CN2482269Y (en) | 2002-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 00268508 Expired - Lifetime CN2482269Y (en) | 2000-12-28 | 2000-12-28 | Three-phase input filter unit for switch power supply |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102307009A (en) * | 2011-07-11 | 2012-01-04 | 深圳市伟创电气有限公司 | EMI filter circuit |
| CN102075091B (en) * | 2009-11-24 | 2013-02-27 | 华东光电集成器件研究所 | Power supply device with extremely low harmonic interference |
| CN102969999A (en) * | 2012-11-22 | 2013-03-13 | 西安开容电子技术有限责任公司 | Communication bus filter |
| CN103095122A (en) * | 2013-02-26 | 2013-05-08 | 广东工业大学 | Electro-magnetic interference (EMI) filter used for three-phase three-level three-switch power factor correction (PFC) circuit |
| CN104052251A (en) * | 2013-03-13 | 2014-09-17 | 雅达电子国际有限公司 | Power Supply Systems With Filters |
| CN107290624A (en) * | 2017-06-19 | 2017-10-24 | 武汉理工大学 | A kind of three-phase distribution circuit model suitable for non-effective earthing power distribution network |
| CN107810594A (en) * | 2015-06-26 | 2018-03-16 | 三菱电机株式会社 | Common-mode filter device and electric equipment |
| CN109962606A (en) * | 2017-12-22 | 2019-07-02 | 大众汽车有限公司 | Drawing electric network in electric vehicle |
| CN110275078A (en) * | 2019-07-16 | 2019-09-24 | 国网江苏省电力有限公司电力科学研究院 | Substation secondary cable earth-return harasses differentiating method, system and storage medium |
| CN111181413A (en) * | 2018-11-13 | 2020-05-19 | 罗克韦尔自动化技术公司 | Power conversion system and filter for the same |
| CN113691120A (en) * | 2021-07-16 | 2021-11-23 | 北京无线电测量研究所 | Power filter for PWM power amplifying circuit |
| CN115021591A (en) * | 2022-08-08 | 2022-09-06 | 深圳市恒运昌真空技术有限公司 | LCC topological circuit for converting three phases into DC-DC |
| CN115313845A (en) * | 2022-10-12 | 2022-11-08 | 深圳市高斯宝电气技术有限公司 | Three-phase switching power supply circuit |
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2000
- 2000-12-28 CN CN 00268508 patent/CN2482269Y/en not_active Expired - Lifetime
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075091B (en) * | 2009-11-24 | 2013-02-27 | 华东光电集成器件研究所 | Power supply device with extremely low harmonic interference |
| CN102307009A (en) * | 2011-07-11 | 2012-01-04 | 深圳市伟创电气有限公司 | EMI filter circuit |
| CN102969999A (en) * | 2012-11-22 | 2013-03-13 | 西安开容电子技术有限责任公司 | Communication bus filter |
| CN103095122A (en) * | 2013-02-26 | 2013-05-08 | 广东工业大学 | Electro-magnetic interference (EMI) filter used for three-phase three-level three-switch power factor correction (PFC) circuit |
| CN104052251A (en) * | 2013-03-13 | 2014-09-17 | 雅达电子国际有限公司 | Power Supply Systems With Filters |
| CN104052251B (en) * | 2013-03-13 | 2018-04-06 | 雅达电子国际有限公司 | Power-supply system with wave filter |
| CN107810594B (en) * | 2015-06-26 | 2020-02-14 | 三菱电机株式会社 | Common mode filter device and electrical apparatus |
| CN107810594A (en) * | 2015-06-26 | 2018-03-16 | 三菱电机株式会社 | Common-mode filter device and electric equipment |
| CN107290624B (en) * | 2017-06-19 | 2019-12-31 | 武汉理工大学 | Three-phase distribution line model suitable for non-effective ground connection distribution network |
| CN107290624A (en) * | 2017-06-19 | 2017-10-24 | 武汉理工大学 | A kind of three-phase distribution circuit model suitable for non-effective earthing power distribution network |
| CN109962606A (en) * | 2017-12-22 | 2019-07-02 | 大众汽车有限公司 | Drawing electric network in electric vehicle |
| CN109962606B (en) * | 2017-12-22 | 2021-12-03 | 大众汽车有限公司 | Traction network in an electric vehicle |
| CN111181413A (en) * | 2018-11-13 | 2020-05-19 | 罗克韦尔自动化技术公司 | Power conversion system and filter for the same |
| EP3654511A1 (en) * | 2018-11-13 | 2020-05-20 | Rockwell Automation Technologies, Inc. | Power conversion system and filter therefor |
| CN111181413B (en) * | 2018-11-13 | 2023-11-24 | 罗克韦尔自动化技术公司 | Power conversion system and filter for the same |
| CN110275078A (en) * | 2019-07-16 | 2019-09-24 | 国网江苏省电力有限公司电力科学研究院 | Substation secondary cable earth-return harasses differentiating method, system and storage medium |
| CN110275078B (en) * | 2019-07-16 | 2021-10-15 | 国网江苏省电力有限公司电力科学研究院 | Method and system for distinguishing secondary cable ground loop disturbance of transformer substation and storage medium |
| CN113691120A (en) * | 2021-07-16 | 2021-11-23 | 北京无线电测量研究所 | Power filter for PWM power amplifying circuit |
| CN115021591A (en) * | 2022-08-08 | 2022-09-06 | 深圳市恒运昌真空技术有限公司 | LCC topological circuit for converting three phases into DC-DC |
| CN115313845A (en) * | 2022-10-12 | 2022-11-08 | 深圳市高斯宝电气技术有限公司 | Three-phase switching power supply circuit |
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Owner name: ZTE CO., LTD. Free format text: FORMER NAME OR ADDRESS: SHENZHENG CITY ZTE CO., LTD. |
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Patentee after: ZTE Corporation Patentee before: Zhongxing Communication Co., Ltd., Shenzhen City |
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Expiration termination date: 20101228 Granted publication date: 20020313 |