CN206472027U - A kind of output filter circuit for active power filter - Google Patents
A kind of output filter circuit for active power filter Download PDFInfo
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- CN206472027U CN206472027U CN201621467931.3U CN201621467931U CN206472027U CN 206472027 U CN206472027 U CN 206472027U CN 201621467931 U CN201621467931 U CN 201621467931U CN 206472027 U CN206472027 U CN 206472027U
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- differential mode
- active power
- connection type
- branch roads
- main circuit
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Abstract
The utility model is related to a kind of output filter circuit for active power filter, including：Parallel connection type RC branch roads, are parallel in main circuit；Including：Resistance-capacitance network, is series in main circuit and after parallel connection type RC branch roads, is absorbed for differential mode；Common mode inductance, connects and in main circuit and located between parallel connection type RC branch roads and resistance-capacitance network, is filtered out for common mode.Compared with prior art, the utility model is absorbed by resistance-capacitance network differential mode, and common mode inductance common mode is filtered out, comprehensive connection in series-parallel filter circuit characteristic, realizes efficient filtering characteristic.
Description
Technical field
The utility model is related to a kind of filter circuit, is filtered more particularly, to a kind of output for active power filter
Circuit.
Background technology
Abbreviation APF under active power filter, is by electronic power switch inside it for the harmonic filtration of power circuit
The active inverter of device IGBT compositions produces 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 tackling this partial carrier wave electric current.
Typically conventional filter circuit is using tandem type or the filter circuit of parallel connection, and the RC of parallel connection type as shown in Figure 1 is filtered,
Filtered with the LCL of tandem type shown in Fig. 2.The utility model proposes comprehensive connection in series-parallel filter circuit characteristic is realized efficient
Filtering characteristic.
Utility model content
The purpose of this utility model is exactly the defect in order to overcome above-mentioned prior art presence and provides a kind of for electric power
The output filter circuit of active filter.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of output filter circuit for active power filter, including：
Parallel connection type RC branch roads, are parallel in main circuit；
Including：
Resistance-capacitance network, is series in main circuit and after the parallel connection type RC branch roads, is absorbed for differential mode；
Common mode inductance, connects and in main circuit and located between the parallel connection type RC branch roads and resistance-capacitance network, for altogether
Mould is filtered 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.
The differential mode inductance is provided with two, and the two ends input respectively with two differential mode inductances of the differential mode capacitor altogether
Connection.
The common mode inductance is made up of two iron inductances, the inputs of two iron inductances respectively with parallel connection type RC branch roads
Two ends connection, output end is connected with the two ends of differential mode capacitor respectively.
The parallel connection type RC branch roads include the resistance and the first electric capacity being connected with each other.
The filter circuit also includes the temperature sensor for detection temperature, and the temperature sensor is connected with main circuit.
Compared with prior art, the utility model has advantages below：
1) absorbed by resistance-capacitance network differential mode, and common mode inductance common mode is filtered 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 that simply cost is low.
3) differential mode inductance is provided with two altogether, and input of the two ends respectively with two differential mode inductances of differential mode capacitor is connected,
Ensure the balance of both links.
4) common mode inductance is by two iron inductances, compared to general inductance, has effect amplification, and filtration result is good.
5) temperature sensor detection filter circuit temperature is used, it is to avoid the generation of security incident.
Brief description of the drawings
Fig. 1 is the electrical block diagram that existing tandem type LCL is filtered；
Fig. 2 is the electrical block diagram that existing parallel connection type RC is filtered；
Fig. 3 is structural representation of the present utility model；
Fig. 4 is electrical block diagram of the present utility model；
Wherein：1st, parallel connection type RC branch roads, 2, common mode inductance, 3, differential mode capacitor, 4, differential mode inductance.
Embodiment
The utility model is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with the utility model
Implemented premised on technical scheme, give detailed embodiment and specific operating process, but guarantor of the present utility model
Shield scope 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 branch roads 1, are parallel in main circuit；
Including：
Resistance-capacitance network, is series in main circuit and after parallel connection type RC branch roads 1, is absorbed for differential mode；
Common mode inductance 2, connects and in main circuit and located between parallel connection type RC branch roads 1 and resistance-capacitance network, for common mode
Filter 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.Differential mode inductance 4 is provided with two, and the two ends input respectively with two differential mode inductances 4 of differential mode capacitor 3 altogether
Connection.
Common mode inductance 2 is made up of two iron inductances, the inputs of two iron inductances respectively with parallel connection type RC branch roads 1
Two ends are connected, and two ends of the output end respectively with differential mode capacitor 3 are connected.
Parallel connection type RC branch roads 1 include the resistance and the first electric capacity being connected with each other.
Filter circuit also includes the temperature sensor for detection temperature, and the temperature sensor is connected with main circuit, preferably
, temperature sensor is at parallel connection type RC branch roads 1, close to the big element of caloric value, can be protected when disturbing more
Protect filter circuit.
Claims (6)
1. a kind of output filter circuit for active power filter, including：
Parallel connection type RC branch roads (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 branch roads (1), is absorbed for differential mode；
Common mode inductance (2), connects and in main circuit and located at the parallel connection type RC branch roads (1) between resistance-capacitance network, is used for
Common mode is filtered out.
2. a kind of output filter circuit for active power filter according to claim 1, it is characterised 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, it is characterised in that described
Differential mode inductance (4) is provided with two altogether, and input of the two ends respectively with two differential mode inductances (4) of the differential mode capacitor (3) connects
Connect.
4. a kind of output filter circuit for active power filter according to claim 3, it is characterised in that described
Common mode inductance (2) is made up of two iron inductances, the two ends of the inputs of two iron inductances respectively with parallel connection type RC branch roads (1)
Connection, two ends of the output end respectively with differential mode capacitor (3) are connected.
5. a kind of output filter circuit for active power filter according to claim 1, it is characterised in that described
Parallel connection type RC branch roads (1) include the resistance and the first electric capacity being connected with each other.
6. a kind of output filter circuit for active power filter according to claim 1, it is characterised in that described
Filter circuit also includes the temperature sensor for detection temperature, and the temperature sensor is connected with main circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621467931.3U CN206472027U (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 |
|---|---|---|---|
| CN201621467931.3U CN206472027U (en) | 2016-12-29 | 2016-12-29 | A kind of output filter circuit for active power filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206472027U true CN206472027U (en) | 2017-09-05 |
Family
ID=59712736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621467931.3U Active CN206472027U (en) | 2016-12-29 | 2016-12-29 | A kind of output filter circuit for active power filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206472027U (en) |
-
2016
- 2016-12-29 CN CN201621467931.3U patent/CN206472027U/en active Active
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