CN202616985U - Filter circuit structure - Google Patents
Filter circuit structure Download PDFInfo
- Publication number
- CN202616985U CN202616985U CN 201220254940 CN201220254940U CN202616985U CN 202616985 U CN202616985 U CN 202616985U CN 201220254940 CN201220254940 CN 201220254940 CN 201220254940 U CN201220254940 U CN 201220254940U CN 202616985 U CN202616985 U CN 202616985U
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- filter circuit
- inductance
- capacitor
- tie point
- circuit structure
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Abstract
Provided is a filter circuit structure, belonging to the technical field of electric power systems. The filter circuit structure includes at least two capacitors, at least two inductors, and a non-inductive resistor, the first capacitor is serially connected with the first inductor, the second capacitor is serially connected with the second inductor, and the non-inductive resistor is arranged between the connection point of the first capacitor and the first inductor and the connection point of the second capacitor and the second inductor. The filter circuit structure provided has the advantages of being low in active loss and high in filtering efficiency, and being free of the amplification of the frequency harmonic wave which is adjacent to a specified characteristic harmonic wave.
Description
Technical field
The utility model belongs to technical field of power systems, is specifically related to a kind of filter circuit construction.
Background technology
Filter circuit is usually used in the elimination harmonic wave, and generally by reactance component, capacitor element and resistance are formed the various types filter circuit.
Fig. 1 is existing second-order filter circuit structural circuit schematic diagram, adopts inductance L earlier parallelly connected with resistance R, and the structure of series capacitance C realizes again.Fig. 2 is existing three rank filter circuit construction circuit theory diagrams, adopts capacitor C 2 to connect earlier with resistance R, shunt inductance L again, the structure of connecting with capacitor C 1 again realization.More than in two kinds of filter circuits the load resistance voltage big, the electric current of the load resistance that causes flowing through is big, the circuit active loss is high.
Summary of the invention
To the deficiency that existing apparatus exists, the utility model proposes a kind of filter circuit construction, to reach the reduction active loss, improves filtration efficiency, prevents the purpose that adjacent times harmonic with the characteristic specified harmonic wave amplifies.
A kind of filter circuit construction; Comprise at least two electric capacity, at least two inductance and a noninductive resistance; First electric capacity and the series connection of first inductance; The series connection of second electric capacity and second inductance is connected a noninductive resistance between the tie point of the tie point of first electric capacity and first inductance and second electric capacity and second inductance.
A kind of filter circuit construction also can noninductive resistance R2 of parallel connection, perhaps series arm of being made up of capacitor C 3 and noninductive resistance R2 of parallel connection at described second inductance L 2 two ends.
The advantage of the utility model:
The existing relatively filter circuit construction of the utility model; Can reduce active loss, improve filtration efficiency characteristic specified harmonic wave (odd harmonic or even-order harmonic); Can prevent simultaneously that (for example: the specific characteristic harmonic wave: 1,3,5 subharmonic, its adjacent times harmonic is adjacent times harmonic with the specific characteristic harmonic wave: 2,4,6 subharmonic) amplify.
Description of drawings
Fig. 1 is existing second-order filter circuit structural circuit schematic diagram;
Fig. 2 is existing three rank filter circuit construction circuit theory diagrams;
Fig. 3 is a kind of execution mode filter circuit of the utility model schematic diagram;
Fig. 4 is first kind of expansion structural circuit schematic diagram of a kind of execution mode filter circuit of the utility model;
Fig. 5 is second kind of expansion structural circuit schematic diagram of a kind of execution mode filter circuit of the utility model;
Fig. 6 is a kind of filter circuit schematic diagram under first kind of execution mode of the utility model;
Fig. 7 is a kind of filter circuit schematic diagram under second kind of execution mode of the utility model.
Embodiment
Further specify below in conjunction with the execution mode of accompanying drawing the utility model.
Be illustrated in figure 3 as a kind of execution mode filter circuit of the utility model schematic diagram, comprise two capacitor C 1 and C2, two inductance L 1 and L2, a noninductive resistance R and a K switch.Wherein, first capacitor C 1 and 1 series connection of first inductance L form first branch road; Second capacitor C 2 and 2 series connection of second inductance L form second branch road, and first branch road is parallelly connected with second branch road; Above-mentioned parallel circuits one end connects K switch, and the other end connects neutral point; And between the tie point b of the tie point a of first capacitor C 1 and first inductance L 1 and second capacitor C 2 and second inductance L 2, be connected a noninductive resistance R.
Above-mentioned second inductance L, 2 two ends also can noninductive resistance R2 of parallel connection, and are as shown in Figure 4, and perhaps the series arm be made up of capacitor C 3 and noninductive resistance R2 of one of parallel connection is as shown in Figure 5.
The 1st kind of execution mode of the utility model is as shown in Figure 6, wherein, comprises four each and every one capacitor C 1, C2, C3 and C4, three inductance L 1, L2 and L3, three noninductive resistance R1, R2 and R3.Wherein, capacitor C 1 one ends are connected with inductance L 1 one ends and are formed first branch road, and its tie point is a; Capacitor C 2 is connected with inductance L 2 and is formed second branch road, and its tie point is b; Capacitor C 3 is connected with inductance L 3 and is formed the 3rd branch road, and its tie point is c; Above-mentioned three branch road parallel connections, and a noninductive resistance R1 is set between tie point a and tie point b, a noninductive resistance R2 is set between tie point b and tie point c; Series arm of forming by capacitor C 4 and noninductive resistance R3 of parallel connection at inductance L 3 two ends.A kind of filter circuit construction of present embodiment, simultaneously three kinds of adjacent odd harmonics of filtering or even-order harmonic, for example: 1,3,5 subharmonic or 2,4,6 subharmonic.
The 2nd kind of execution mode of the utility model is as shown in Figure 7, comprises five capacitor C 1, C2, C3, C4 and C5, four inductance L 1, L2, L3 and L4, four noninductive resistance R1, R2, R3 and R4.Wherein, capacitor C 1 one ends are connected with inductance L 1 one ends and are formed first branch road, and its tie point is a; Capacitor C 2 is connected with inductance L 2 and is formed second branch road, and its tie point is b; Capacitor C 3 is connected with inductance L 3 and is formed the 3rd branch road, and its tie point is c; Capacitor C 4 is connected with inductance L 4 and is formed the 4th branch road, and its tie point is d; Above-mentioned four branch road parallel connections, and a noninductive resistance R1 is set between tie point a and tie point b, a noninductive resistance R2 is set between tie point b and tie point c, a noninductive resistance R3 is set between tie point c and the tie point d; Series arm of forming by capacitor C 5 and noninductive resistance R4 of parallel connection at inductance L 4 two ends.A kind of filter circuit construction of embodiment 2, simultaneously four kinds of adjacent odd harmonics of filtering or even-order harmonic, for example: 1,3,5,7 subharmonic or 2,4,6,8 subharmonic.
Claims (2)
1. filter circuit construction; It is characterized in that: comprise at least two electric capacity, at least two inductance and a noninductive resistance; First electric capacity and the series connection of first inductance; The series connection of second electric capacity and second inductance is connected a noninductive resistance between the tie point of the tie point of first electric capacity and first inductance and second electric capacity and second inductance.
2. a kind of filter circuit construction according to claim 1 is characterized in that: also can a parallel connection noninductive resistance (R2), perhaps series arm of being made up of electric capacity (C3) and noninductive resistance (R2) of parallel connection at described second inductance (L2) two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220254940 CN202616985U (en) | 2012-05-31 | 2012-05-31 | Filter circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220254940 CN202616985U (en) | 2012-05-31 | 2012-05-31 | Filter circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202616985U true CN202616985U (en) | 2012-12-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220254940 Expired - Fee Related CN202616985U (en) | 2012-05-31 | 2012-05-31 | Filter circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202616985U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710106A (en) * | 2012-05-31 | 2012-10-03 | 沈阳鼎盛中贝机电设备有限公司 | Filter circuit structure |
| CN104269851A (en) * | 2014-10-22 | 2015-01-07 | 沈阳鼎盛中贝机电设备有限公司 | Chain type filter |
-
2012
- 2012-05-31 CN CN 201220254940 patent/CN202616985U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710106A (en) * | 2012-05-31 | 2012-10-03 | 沈阳鼎盛中贝机电设备有限公司 | Filter circuit structure |
| CN104269851A (en) * | 2014-10-22 | 2015-01-07 | 沈阳鼎盛中贝机电设备有限公司 | Chain type filter |
| CN104269851B (en) * | 2014-10-22 | 2016-08-17 | 沈阳鼎盛中贝机电设备有限公司 | A kind of iterated electrical filter |
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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: 20121219 Termination date: 20150531 |
|
| EXPY | Termination of patent right or utility model |