CN202930945U - Passive filter circuit - Google Patents
Passive filter circuit Download PDFInfo
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- CN202930945U CN202930945U CN2012206658675U CN201220665867U CN202930945U CN 202930945 U CN202930945 U CN 202930945U CN 2012206658675 U CN2012206658675 U CN 2012206658675U CN 201220665867 U CN201220665867 U CN 201220665867U CN 202930945 U CN202930945 U CN 202930945U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The utility model discloses a passive filter circuit, which is characterized by comprising a three-phase bridge circuit. The three-phase bridge circuit is composed of three IGBT bridge arms. AC output of each bridge arm is respectively connected to an input end of a first three-phase electric reactor, an output end of which is respectively connected to an input end of a second three-phase electric reactor. Output ends of the second three-phase electric reactor are respectively connected to alternating current power supply terminals. Input ends of damp resistors are respectively connected to connection points of the first and second three-phase electric reactors. Output ends of the damp resistors are respectively connected to input ends of filter capacitors. Output ends of the filter capacitors are short-circuited together and simultaneously are connected to a ground terminal. Through rational distribution of the circuit, system efficiency is raised, and higher harmonics generated by a system are effectively decayed.
Description
Technical field
The utility model belongs to the power electronic equipment technical field, is specifically related to a kind of passive filter circuit.
Background technology
In recent years, domestic the beginning is widely used Active Power Filter-APF on industry and civil equipment, and the capacity of stand-alone device progressively improves, and its application is from the future development of compensation user's self the whole power system power supply quality of humorous wave direction improvement.
In active power filter device, the switching device aspect has adopted the IGBT control device mostly, and also has the device such as resistance capacitance, but because Primary Component IGBT module is worked under high frequency, be the most crucial parts of the operation of whole equipment, so it play decisive role to whole equipment performance.High frequency switching device can produce very large du/dt and di/dt.Due to the existence of stray capacitance, inductance, make a large amount of harmonic wave of formation in circuit, when being incorporated into the power networks severe jamming electrical network, loss is large, efficient is low.
Because the traditional passive filter circuit that uses is to be made of lc circuit, volume is large, and loss is high, and the current ripples inhibition is undesirable.
Summary of the invention
The technical problems to be solved in the utility model is to provide passive filter circuit, and this circuit has carried out rational deployment, has improved system effectiveness, and high order harmonic component that system produces has effectively decayed.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of passive filter circuit comprises three-phase bridge circuit,
Described three-phase bridge circuit is comprised of three IGBT brachium pontis, the interchange output of each brachium pontis is connected respectively to the input of the first three-phase reactor, the first three-phase reactor output be connected respectively to the input of the second three-phase reactor, the second three-phase reactor output be connected respectively to the alternating current source
The input of damping resistance is received respectively on the tie point of the first three-phase reactor and the second three-phase reactor, and the output of damping resistance is connected respectively to the input of filter capacitor, and the output of filter capacitor is shorted together, and is connected on earth terminal simultaneously.
By technique scheme, the beneficial effects of the utility model are:
The utility model has been realized the modularization of circuit, and volume is little, has reduced inductance value, has improved the dynamic property of system, and high order harmonic component that this system produces has effectively decayed.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is structural representation of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
With reference to Fig. 1, a kind of passive filter circuit, comprise three-phase bridge circuit, described three-phase bridge circuit is comprised of three IGBT brachium pontis, and the interchange of each brachium pontis output is connected respectively to the input of the first three-phase reactor L1, the first three-phase reactor L1 output be connected respectively to the input of the second three-phase reactor L2, the second three-phase reactor L2 output be connected respectively to alternating current source A, B, C
Damping resistance R1, R2, the input of R3 receive respectively on the tie point of the first three-phase reactor L1 and the second three-phase reactor L2, damping resistance R1, R2, the output of R3 is connected respectively to filter capacitor C1, C2, the input of C3, filter capacitor C1, C2, the output of C3 is shorted together, and is connected to simultaneously on earth terminal PE.
By new-type circuit, carry out rational deployment, improve system effectiveness, high order harmonic component that this system produces has effectively decayed.
Above demonstration and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (1)
1. passive filter circuit, it is characterized in that, comprise three-phase bridge circuit, described three-phase bridge circuit is comprised of three IGBT brachium pontis, the interchange output of each brachium pontis is connected respectively to the input of the first three-phase reactor, the first three-phase reactor output be connected respectively to the input of the second three-phase reactor, the second three-phase reactor output be connected respectively to the alternating current source
The input of damping resistance is received respectively on the tie point of the first three-phase reactor and the second three-phase reactor, and the output of damping resistance is connected respectively to the input of filter capacitor, and the output of filter capacitor is shorted together, and is connected on earth terminal simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206658675U CN202930945U (en) | 2012-12-06 | 2012-12-06 | Passive filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206658675U CN202930945U (en) | 2012-12-06 | 2012-12-06 | Passive filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202930945U true CN202930945U (en) | 2013-05-08 |
Family
ID=48220855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206658675U Expired - Fee Related CN202930945U (en) | 2012-12-06 | 2012-12-06 | Passive filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202930945U (en) |
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2012
- 2012-12-06 CN CN2012206658675U patent/CN202930945U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20161206 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |