CN102136805A - AC-DC conversion device capable of filtering electromagnetic interference - Google Patents
AC-DC conversion device capable of filtering electromagnetic interference Download PDFInfo
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- CN102136805A CN102136805A CN2010101028275A CN201010102827A CN102136805A CN 102136805 A CN102136805 A CN 102136805A CN 2010101028275 A CN2010101028275 A CN 2010101028275A CN 201010102827 A CN201010102827 A CN 201010102827A CN 102136805 A CN102136805 A CN 102136805A
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- electromagnetic interference
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Abstract
The invention discloses an AC-DC conversion device capable of filtering electromagnetic interference, comprising a half-bridge conversion filtering unit, a common mode inductor, a differential mode inductor and a load end capacitor. The half-bridge conversion filtering unit is connected among an AC power source as well as a first pin and a second pin of the common mode inductor in series. The differential mode inductor is connected between a third pin of the common mode inductor and the load end capacitor in series. The half-bridge conversion filtering unit can inhibit harmonic noise of a power supply during AC-DC conversion, thus the AC-DC conversion device capable of filtering electromagnetic interference has a better low frequency electromagnetic interference characteristic.
Description
Technical field
The present invention changes current/direct-current conversion device relevant for a kind of interchange, but current/direct-current conversion device is changeed in particularly a kind of interchange of filtering electromagnetic interference.
Background technology
Please refer to Fig. 1, it is known filtering electromagnetic interference circuit and exchanges commentaries on classics current/direct-current conversion device block diagram.At first, AC power 10A enters the filtering electromagnetic interference circuit of being made up of electric capacity 22 and common mode inductance 24 30, so as to the filtering electromagnetic interference; Then, pass through the interchange of being formed by rectification circuit 26 (can be full-bridge or half bridge rectifier) and filter capacitor 28 again and change current/direct-current conversion device 40, so as to being transformed into DC power supply.
The frequency range that this filtering electromagnetic interference circuit 30 is is effectively prevented and treated electromagnetic interference is between 150KHz to 30MHz, and the especially minimum 150KHz that only arrives seems not enough; When therefore being applied in this interchange commentaries on classics current/direct-current conversion device 40 so as to the filtering electromagnetic interference, effect is also good inadequately.
Summary of the invention
For improving the shortcoming of above-mentioned known technology, but the object of the present invention is to provide a kind of interchange of filtering electromagnetic interference to change current/direct-current conversion device, can reach better filtering electromagnetic interference effect.
For reaching above-mentioned purpose of the present invention, but the interchange of filtering electromagnetic interference of the present invention is changeed current/direct-current conversion device and is applied to AC power.But the interchange of being somebody's turn to do the filtering electromagnetic interference is changeed current/direct-current conversion device and is comprised: half-bridge translation filtering unit, common mode inductance, differential mode inductance and load end electric capacity.Wherein, this half-bridge translation filtering unit strings is connected between first pin and second pin of this AC power and this common mode inductance; This differential mode inductance is serially connected with between the 3rd pin and this load end electric capacity of this common mode inductance.
Compared with prior art, because but the half-bridge translation filtering unit that the interchange of filtering electromagnetic interference is changeed in the current/direct-current conversion device can suppress the supply harmonic noise when doing the AC-DC conversion, but current/direct-current conversion device is changeed in the interchange of therefore being somebody's turn to do the filtering electromagnetic interference preferable low frequency electromagnetic interference characteristic is arranged, can reach better filtering electromagnetic interference effect.
Description of drawings
Fig. 1 is known filtering electromagnetic interference circuit and exchanges commentaries on classics current/direct-current conversion device block diagram;
But Fig. 2 is the embodiment block diagram that current/direct-current conversion device is changeed in the interchange of filtering electromagnetic interference of the present invention;
But being the interchange of filtering electromagnetic interference of the present invention, Fig. 3 changes another embodiment block diagram of current/direct-current conversion device;
But being the interchange of filtering electromagnetic interference of the present invention, Fig. 4 changes the another embodiment block diagram of current/direct-current conversion device.
Description of reference numerals
AC power 10A
Electric capacity 22
Filtering electromagnetic interference circuit 30
Exchanging changes current/direct-current conversion device 40
But current/direct-current conversion device 20 is changeed in the interchange of filtering electromagnetic interference
AC power 10
Half-bridge translation filtering unit 220
Common mode inductance Lcm
Differential mode inductance Ldm
The first diode D1
Power end capacitor C 1
Filter capacitor C2
Load end capacitor C 3
Transformer T1
The first pin P1
The second pin P2
The 3rd pin P3
The 4th pin P4
But current/direct-current conversion device 20A is changeed in the interchange of filtering electromagnetic interference
Half-bridge translation filtering unit 220A
The second diode D2
But current/direct-current conversion device 20B is changeed in the interchange of filtering electromagnetic interference
Half-bridge translation filtering unit 220B
Embodiment
Please refer to Fig. 2, but it is the embodiment block diagram of the interchange commentaries on classics current/direct-current conversion device of filtering electromagnetic interference of the present invention.But the interchange of filtering electromagnetic interference of the present invention is changeed current/direct-current conversion device 20 and is applied to AC power 10; But the interchange of being somebody's turn to do the filtering electromagnetic interference is changeed current/direct-current conversion device 20 and is comprised half-bridge translation filtering unit 220, common mode inductance Lcm, differential mode inductance Ldm, load end capacitor C 3 and transformer T1.This half-bridge translation filtering unit 220 comprises the first diode D1, power end capacitor C 1 and filter capacitor C2.
This half-bridge translation filtering unit 220 is serially connected with between the first pin P1 and the second pin P2 of this AC power 10 and this common mode inductance Lcm; This differential mode inductance Ldm is serially connected with between the 3rd pin P3 and this load end capacitor C 3 of this common mode inductance Lcm; The anode of this first diode D1 is electrically connected to this power end capacitor C 1 and this AC power 10, and the cathodic electricity of this first diode D1 is connected to the first pin P1 of this filter capacitor C2 and this common mode inductance Lcm; The second pin P2 of this common mode inductance Lcm is electrically connected to this power end capacitor C 1, this filter capacitor C2 and this AC power 10; This transformer T1 is electrically connected to the 4th pin P4 of this differential mode inductance Ldm, this load end capacitor C 3 and this common mode inductance Lcm.
This filter capacitor C2 can be electrochemical capacitor; This load end capacitor C 3 can be electrochemical capacitor.
Because this half-bridge translation filtering unit 220 time can suppress the supply harmonic noise doing the AC-DC conversion, but interchange that therefore should the filtering electromagnetic interference is changeed current/direct-current conversion device 20 preferable low frequency electromagnetic interference characteristic is arranged.
Please refer to Fig. 3, but it is another embodiment block diagram of interchange commentaries on classics current/direct-current conversion device of filtering electromagnetic interference of the present invention.But the interchange of filtering electromagnetic interference of the present invention is changeed current/direct-current conversion device 20A and is applied to this AC power 10; But the interchange of being somebody's turn to do the filtering electromagnetic interference is changeed current/direct-current conversion device 20A and is comprised half-bridge translation filtering unit 220A, this common mode inductance Lcm, this differential mode inductance Ldm, this load end capacitor C 3 and this transformer T1.This half-bridge translation filtering unit 220A comprises this first diode D1, this power end capacitor C 1, this filter capacitor C2 and the second diode D2.
This half-bridge translation filtering unit 220A is serially connected with between the first pin P1 and the second pin P2 of this AC power 10 and this common mode inductance Lcm; This differential mode inductance Ldm is serially connected with between the 3rd pin P3 and this load end capacitor C 3 of this common mode inductance Lcm; The anode of this first diode D1 is electrically connected to this power end capacitor C 1 and this AC power 10, and the cathodic electricity of this first diode D1 is connected to the first pin P1 of this filter capacitor C2 and this common mode inductance Lcm; The anode of this second diode D2 is electrically connected to the second pin P2 of this common mode inductance Lcm, and the cathodic electricity of this second diode D2 is connected to this power end capacitor C 1, this filter capacitor C2 and this AC power 10; This transformer T1 is electrically connected to the 4th pin P4 of this differential mode inductance Ldm, this load end capacitor C 3 and this common mode inductance Lcm.
Because this half-bridge translation filtering unit 220A the time can suppress the supply harmonic noise doing the AC-DC conversion, but interchange that therefore should the filtering electromagnetic interference is changeed current/direct-current conversion device 20A preferable low frequency electromagnetic interference characteristic is arranged.
Please refer to Fig. 4, but it is the another embodiment block diagram of interchange commentaries on classics current/direct-current conversion device of filtering electromagnetic interference of the present invention.But the interchange of filtering electromagnetic interference of the present invention is changeed current/direct-current conversion device 20B and is applied to this AC power 10; But the interchange of being somebody's turn to do the filtering electromagnetic interference is changeed current/direct-current conversion device 20B and is comprised half-bridge translation filtering unit 220B, this common mode inductance Lcm, this differential mode inductance Ldm, this load end capacitor C 3 and this transformer T1.This half-bridge translation filtering unit 220B comprises this first diode D1, this power end capacitor C 1, this filter capacitor C2 and this second diode D2.
This half-bridge translation filtering unit 220B is serially connected with between the first pin P1 and the second pin P2 of this AC power 10 and this common mode inductance Lcm; This differential mode inductance Ldm is serially connected with between the 3rd pin P3 and this load end capacitor C 3 of this common mode inductance Lcm; The anode of this first diode D1 is electrically connected to this power end capacitor C 1 and this AC power 10, and the cathodic electricity of this first diode D1 is connected to the first pin P1 of this filter capacitor C2 and this common mode inductance Lcm; The anode of this second diode D2 is electrically connected to the second pin P2 and this filter capacitor C2 of this common mode inductance Lcm, and the cathodic electricity of this second diode D2 is connected to this power end capacitor C 1 and this AC power 10; This transformer T1 is electrically connected to the 4th pin P4 of this differential mode inductance Ldm, this load end capacitor C 3 and this common mode inductance Lcm.
Because this half-bridge translation filtering unit 220B the time can suppress the supply harmonic noise doing the AC-DC conversion, but interchange that therefore should the filtering electromagnetic interference is changeed current/direct-current conversion device 20B preferable low frequency electromagnetic interference characteristic is arranged.
This AC power 10 is through the electrical processing back (rectification, filtering and filtering electromagnetic interference or the like) of circuit among above-mentioned these embodiment, and this AC power 10 not only can be converted into DC power supply, and the effect of filtering electromagnetic interference is more better than known technology; But the interchange of filtering electromagnetic interference of the present invention commentaries on classics current/direct-current conversion device is is effectively prevented and treated the frequency range of electromagnetic interference will be between 9KHz to 30MHz, effectively prevent and treat the frequency range (between the 150KHz to 30MHz) of electromagnetic interference compared with known technology, more broad and superior in low frequency part.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (9)
1. but current/direct-current conversion device is changeed in the interchange of a filtering electromagnetic interference, is applied to AC power, it is characterized in that, but the interchange of this filtering electromagnetic interference commentaries on classics current/direct-current conversion device comprises:
Half-bridge translation filtering unit;
Common mode inductance;
Differential mode inductance; And
Load end electric capacity,
Wherein, this half-bridge translation filtering unit strings is connected between first pin and second pin of this AC power and this common mode inductance; This differential mode inductance is serially connected with between the 3rd pin and this load end electric capacity of this common mode inductance.
2. but current/direct-current conversion device is changeed in the interchange of filtering electromagnetic interference as claimed in claim 1, it is characterized in that, described half-bridge translation filtering unit comprises first diode, the anode of this first diode is electrically connected to this AC power, and the cathodic electricity of this first diode is connected to first pin of this common mode inductance.
3. but current/direct-current conversion device is changeed in the interchange of filtering electromagnetic interference as claimed in claim 2, it is characterized in that described half-bridge translation filtering unit more comprises power end electric capacity, and this power end electric capacity is electrically connected to the anode of this first diode.
4. but current/direct-current conversion device is changeed in the interchange of filtering electromagnetic interference as claimed in claim 3, it is characterized in that described half-bridge translation filtering unit more comprises filter capacitor, and this filter capacitor is electrically connected to the negative electrode of this first diode.
5. but current/direct-current conversion device is changeed in the interchange of filtering electromagnetic interference as claimed in claim 4, it is characterized in that, described half-bridge translation filtering unit more comprises second diode, the anode of this second diode is electrically connected to second pin of this common mode inductance, and the cathodic electricity of this second diode is connected to this power end electric capacity, this filter capacitor and this AC power.
6. but current/direct-current conversion device is changeed in the interchange of filtering electromagnetic interference as claimed in claim 4, it is characterized in that, described half-bridge translation filtering unit more comprises second diode, the anode of this second diode is electrically connected to second pin and this filter capacitor of this common mode inductance, and the cathodic electricity of this second diode is connected to this power end electric capacity and this AC power.
7. but current/direct-current conversion device is changeed in the interchange of filtering electromagnetic interference as claimed in claim 4, it is characterized in that this conversion equipment more comprises transformer, and this transformer is electrically connected to the 4th pin of this differential mode inductance, this load end electric capacity and this common mode inductance.
8. but current/direct-current conversion device is changeed in the interchange of filtering electromagnetic interference as claimed in claim 4, it is characterized in that this filter capacitor is an electrochemical capacitor.
9. but current/direct-current conversion device is changeed in the interchange of filtering electromagnetic interference as claimed in claim 4, it is characterized in that this load end electric capacity is electrochemical capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101028275A CN102136805A (en) | 2010-01-25 | 2010-01-25 | AC-DC conversion device capable of filtering electromagnetic interference |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101028275A CN102136805A (en) | 2010-01-25 | 2010-01-25 | AC-DC conversion device capable of filtering electromagnetic interference |
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| Publication Number | Publication Date |
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| CN102136805A true CN102136805A (en) | 2011-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2010101028275A Pending CN102136805A (en) | 2010-01-25 | 2010-01-25 | AC-DC conversion device capable of filtering electromagnetic interference |
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| CN (1) | CN102136805A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208913A (en) * | 2012-01-11 | 2013-07-17 | 台达电子工业股份有限公司 | Filtering reactance level and variable frequency driving system using same |
| CN103384119A (en) * | 2013-06-24 | 2013-11-06 | 株洲变流技术国家工程研究中心有限公司 | Alternating current side energy-taking device and method for static var generator unit module |
| CN103684002A (en) * | 2012-09-24 | 2014-03-26 | 通用电气公司 | Energy conversion system |
| CN105122623A (en) * | 2013-04-17 | 2015-12-02 | 密执安州立大学董事会 | Single phase bi-directional ac-dc converter with reduced passive components size and common mode electro-magnetic interference |
| CN105743334A (en) * | 2016-03-29 | 2016-07-06 | 上海中科深江电动车辆有限公司 | Filtering circuit of low-voltage power supply loop |
| CN110932559A (en) * | 2019-12-03 | 2020-03-27 | 成都长城开发科技有限公司 | Power module of ammeter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5818705A (en) * | 1995-07-13 | 1998-10-06 | Compaq Computer Corporation | Portable computer having built-in AC adapter incorporating a space efficient electromagnetic interference filter |
-
2010
- 2010-01-25 CN CN2010101028275A patent/CN102136805A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5818705A (en) * | 1995-07-13 | 1998-10-06 | Compaq Computer Corporation | Portable computer having built-in AC adapter incorporating a space efficient electromagnetic interference filter |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208913A (en) * | 2012-01-11 | 2013-07-17 | 台达电子工业股份有限公司 | Filtering reactance level and variable frequency driving system using same |
| CN103208913B (en) * | 2012-01-11 | 2015-05-20 | 台达电子工业股份有限公司 | Filtering reactance level and variable frequency driving system using same |
| CN103684002A (en) * | 2012-09-24 | 2014-03-26 | 通用电气公司 | Energy conversion system |
| CN103684002B (en) * | 2012-09-24 | 2016-12-21 | 通用电气公司 | Energy conversion system |
| US9537423B2 (en) | 2012-09-24 | 2017-01-03 | General Electric Company | Power conversion system |
| CN105122623A (en) * | 2013-04-17 | 2015-12-02 | 密执安州立大学董事会 | Single phase bi-directional ac-dc converter with reduced passive components size and common mode electro-magnetic interference |
| CN103384119A (en) * | 2013-06-24 | 2013-11-06 | 株洲变流技术国家工程研究中心有限公司 | Alternating current side energy-taking device and method for static var generator unit module |
| CN105743334A (en) * | 2016-03-29 | 2016-07-06 | 上海中科深江电动车辆有限公司 | Filtering circuit of low-voltage power supply loop |
| CN110932559A (en) * | 2019-12-03 | 2020-03-27 | 成都长城开发科技有限公司 | Power module of ammeter |
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Application publication date: 20110727 |