CN108258890A - A kind of output filter circuit for active power filter - Google Patents
A kind of output filter circuit for active power filter Download PDFInfo
- Publication number
- CN108258890A CN108258890A CN201611248458.4A CN201611248458A CN108258890A CN 108258890 A CN108258890 A CN 108258890A CN 201611248458 A CN201611248458 A CN 201611248458A CN 108258890 A CN108258890 A CN 108258890A
- Authority
- CN
- China
- Prior art keywords
- differential mode
- branches
- active power
- connection type
- main circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
Abstract
The present invention relates to a kind of output filter circuit for active power filter, including：Parallel connection type RC branches, are parallel in main circuit；Including：Resistance-capacitance network is series in main circuit and after parallel connection type RC branches, is absorbed for differential mode；Common mode inductance is connected and in main circuit and set between parallel connection type RC branches and resistance-capacitance network, is filtered out for common mode.Compared with prior art, the present invention is absorbed by resistance-capacitance network differential mode and common mode inductance common mode filters out, and comprehensive connection in series-parallel filter circuit characteristic realizes efficient filtering characteristic.
Description
Technical field
The present invention relates to a kind of filter circuit, more particularly, to a kind of output filtered electrical for active power filter
Road.
Background technology
Abbreviation APF under active power filter, for the harmonic filtration of power circuit, inside be by electronic power switch
The active inverter of device IGBT compositions generates opposite direction harmonic wave and is offset to realize its electric function, so its output electricity
Stream includes the switch carrier current of high frequency, and general APF outputs can all increase the output filter circuit for coping with this partial carrier wave electric current.
General common filter circuit is filtered using tandem type or the filter circuit of parallel connection, the RC of parallel connection type as shown in Figure 1,
It is filtered with the LCL of tandem type shown in Fig. 2.Proposed by the present invention to be, comprehensive connection in series-parallel filter circuit characteristic realizes efficient filtering
Characteristic.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind is active for electric power
The output filter circuit of wave filter.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of output filter circuit for active power filter, including：
Parallel connection type RC branches, are parallel in main circuit；
Including：
Resistance-capacitance network is series in main circuit and after the parallel connection type RC branches, is absorbed for differential mode；
Common mode inductance, series connection and in main circuit and set between the parallel connection type RC branches and resistance-capacitance network, for altogether
Mould filters out.
The resistance-capacitance network includes differential mode capacitor and differential mode inductance, and the differential mode capacitor is parallel in main circuit, the difference
Mould inductance is series in main circuit.
There are two the differential mode inductance is set altogether, and the both ends of the differential mode capacitor input terminal with two differential mode inductances respectively
Connection.
The common mode inductance is made of two iron inductances, the input terminals of two iron inductances respectively with parallel connection type RC branches
Both ends connection, output terminal connect respectively with the both ends of differential mode capacitor.
The parallel connection type RC branches include the resistance and the first capacitance that are connected with each other.
The filter circuit further includes the temperature sensor for detecting temperature, which connect with main circuit.
Compared with prior art, the present invention has the following advantages：
1) it is absorbed by resistance-capacitance network differential mode and common mode inductance common mode filters out, comprehensive connection in series-parallel filter circuit characteristic is realized
Efficient filtering characteristic.
2) resistance-capacitance network includes differential mode capacitor and differential mode inductance, realizes simply, at low cost.
3) there are two differential mode inductance is set altogether, and input terminal of the both ends of differential mode capacitor respectively with two differential mode inductances is connect,
Ensure the balance of both links.
4) common mode inductance compared to general inductance, has effect amplification, filtration result is good by two iron inductances.
5) using temperature sensor detection filter circuit temperature, the generation of safety accident is avoided.
Description of the drawings
Fig. 1 is the electrical block diagram of existing tandem type LCL filtering；
Fig. 2 is the electrical block diagram of existing parallel connection type RC filtering；
Fig. 3 is the structure diagram of the present invention；
Fig. 4 is the electrical block diagram of the present invention；
Wherein：1st, parallel connection type RC branches, 2, common mode inductance, 3, differential mode capacitor, 4, differential mode inductance.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
A kind of output filter circuit for active power filter, as shown in Figure 3 and Figure 4, including：
Parallel connection type RC branches 1, are parallel in main circuit；
Including：
Resistance-capacitance network is series in main circuit and after parallel connection type RC branches 1, is absorbed for differential mode；
Common mode inductance 2, series connection and in main circuit and set between parallel connection type RC branches 1 and resistance-capacitance network, for common mode
It filters out.
Resistance-capacitance network includes differential mode capacitor 3 and differential mode inductance 4, and differential mode capacitor 3 is parallel in main circuit, and differential mode inductance 4 is gone here and there
It is coupled in main circuit.There are two differential mode inductance 4 is set altogether, and the both ends of differential mode capacitor 3 input terminal with two differential mode inductances 4 respectively
Connection.
Common mode inductance 2 is made of two iron inductances, the input terminals of two iron inductances respectively with parallel connection type RC branches 1
Both ends connect, and both ends of the output terminal respectively with differential mode capacitor 3 are connect.
Parallel connection type RC branches 1 include the resistance and the first capacitance that are connected with each other.
Filter circuit further includes the temperature sensor for detecting temperature, which connect with main circuit, preferably
, temperature sensor is set at parallel connection type RC branches 1, the element big close to calorific value, can be protected when interfering more
Protect filter circuit.
Claims (6)
1. a kind of output filter circuit for active power filter, including：
Parallel connection type RC branches (1), are parallel in main circuit；
It is characterised in that it includes：
Resistance-capacitance network is series in main circuit and after the parallel connection type RC branches (1), is absorbed for differential mode；
Common mode inductance (2) is connected and in main circuit and set on the parallel connection type RC branches (1) between resistance-capacitance network, is used for
Common mode filters out.
2. a kind of output filter circuit for active power filter according to claim 1, which is characterized in that described
Resistance-capacitance network includes differential mode capacitor (3) and differential mode inductance (4), and the differential mode capacitor (3) is parallel in main circuit, the differential mode electricity
Sense (4) is series in main circuit.
3. a kind of output filter circuit for active power filter according to claim 2, which is characterized in that described
There are two differential mode inductance (4) is set altogether, and the both ends of the differential mode capacitor (3) connect respectively with the input terminal of two differential mode inductances (4)
It connects.
4. a kind of output filter circuit for active power filter according to claim 3, which is characterized in that described
Common mode inductance (2) is made of two iron inductances, the input terminals of two iron inductances both ends with parallel connection type RC branches (1) respectively
Connection, both ends of the output terminal respectively with differential mode capacitor (3) are connect.
5. a kind of output filter circuit for active power filter according to claim 1, which is characterized in that described
Resistance and first capacitance of the parallel connection type RC branches (1) including interconnection.
6. a kind of output filter circuit for active power filter according to claim 1, which is characterized in that described
Filter circuit further includes the temperature sensor for detecting temperature, which connect with main circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611248458.4A CN108258890A (en) | 2016-12-29 | 2016-12-29 | A kind of output filter circuit for active power filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611248458.4A CN108258890A (en) | 2016-12-29 | 2016-12-29 | A kind of output filter circuit for active power filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108258890A true CN108258890A (en) | 2018-07-06 |
Family
ID=62721306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611248458.4A Pending CN108258890A (en) | 2016-12-29 | 2016-12-29 | A kind of output filter circuit for active power filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108258890A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450236A (en) * | 2018-12-19 | 2019-03-08 | 中国电子科技集团公司第四十三研究所 | A kind of EMI damping filter circuit and filtering method |
| CN109915946A (en) * | 2019-03-21 | 2019-06-21 | 广东美的制冷设备有限公司 | Electric control gear, outdoor unit and air conditioner |
-
2016
- 2016-12-29 CN CN201611248458.4A patent/CN108258890A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450236A (en) * | 2018-12-19 | 2019-03-08 | 中国电子科技集团公司第四十三研究所 | A kind of EMI damping filter circuit and filtering method |
| CN109915946A (en) * | 2019-03-21 | 2019-06-21 | 广东美的制冷设备有限公司 | Electric control gear, outdoor unit and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180706 |
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| WD01 | Invention patent application deemed withdrawn after publication |