CN204244065U - Filter circuit and three-phase inverter - Google Patents
Filter circuit and three-phase inverter Download PDFInfo
- Publication number
- CN204244065U CN204244065U CN201420758216.XU CN201420758216U CN204244065U CN 204244065 U CN204244065 U CN 204244065U CN 201420758216 U CN201420758216 U CN 201420758216U CN 204244065 U CN204244065 U CN 204244065U
- Authority
- CN
- China
- Prior art keywords
- phase inverter
- phase
- filter circuit
- inductance
- resistance
- 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.)
- Active
Links
Landscapes
- Inverter Devices (AREA)
Abstract
This application provides a kind of filter circuit and three-phase inverter, wherein, in described filter circuit, the first damping resistance in resistance sense branch road can effective attenuation common-mode voltage, improves inhibition, and improves the resonance phenomena in common mode loop.And; first damping resistance is after the first inductance in parallel; in filter circuit, part common mode loop flows through the first inductance and flows into DC bus; first inductance plays the effect of shunting; decrease the electric current flowing through the first damping resistance; thus reduce the power loss of damping resistance, improve the operational efficiency of three-phase inverter.
Description
Technical field
The application relates to power domain, particularly a kind of filter circuit and three-phase inverter.
Background technology
Existing three-phase inverter, each phase filter reactance all connects a filter capacitor, and the common port of three-phase filter capacitor is directly connected to DC side bus capacitor mid point, to impel common mode current in the flowing of device inner loop, suppresses common mode current to flow out.
But, only there are reactance and electric capacity two undamped devices, can not effective attenuation common-mode voltage, inhibition is undesirable.Further, owing to not having damping in three-phase inverter filter circuit, grid-connected current is easy to produce resonance phenomena.
Utility model content
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of filter circuit and three-phase inverter, with solve that existing three-phase inverter exists because of can not effective attenuation common-mode voltage, cause common mode current inhibition undesirable, and grid-connected current is easy to the problem of generation resonance phenomena.
For achieving the above object, the existing technical scheme proposed is as follows:
The application one embodiment discloses a kind of filter circuit, is applied to three-phase inverter, comprises: resistance sense branch road and be connected to filter inductance and the filter capacitor of described each phase of three-phase inverter; Wherein,
Described resistance sense branch road comprises the first damping resistance in parallel and the first inductance;
Described resistance sense branch road one end connects the common port of three-phase filter capacitor, and the other end is for connecting arbitrary level of the DC side bus of described three-phase inverter; Or, each described resistance sense branch road that is in series of described three-phase inverter, and the common port of three-phase filter capacitor is for connecting arbitrary level of the DC side bus of described three-phase inverter.
Preferably, described filter circuit also comprises:
With described first inductance in parallel and the resonant circuit in parallel with described first damping resistance.
Preferably, described resonant circuit comprises: the second inductance of series connection and the second electric capacity.
Preferably, described filter circuit also comprises:
Employing star connection or delta connection are connected to the 3rd electric capacity on described three-phase inverter three-phase.
Preferably, described filter circuit also comprises: with the second damping resistance of described 3rd capacitances in series.
Preferably, described filter circuit also comprises: three inductance in parallel with described second damping resistance.
Another embodiment of the application discloses a kind of three-phase inverter, comprising: filter circuit disclosed in any one embodiment above-mentioned.
Preferably, the type of described three-phase inverter comprises: the three-phase inverter of full-bridge topologies, the three-phase inverter of three-phase " T " font topological structure and the three-phase inverter of three-phase " 1 " font topological structure.
Compared with prior art, the beneficial effect of the application is:
There is provided in a kind of filter circuit in the application, the first damping resistance in resistance sense branch road can effective attenuation common-mode voltage, improves inhibition, and improves the resonance phenomena in common mode loop.And; first damping resistance is after the first inductance in parallel; in filter circuit, part common mode loop flows through the first inductance and flows into DC bus; first inductance plays the effect of shunting; decrease the electric current flowing through the first damping resistance; thus reduce the power loss of damping resistance, improve the operational efficiency of three-phase inverter.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present application, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit diagram of a kind of filter circuit disclosed in the embodiment of the present application;
Fig. 2 is the circuit diagram of a kind of filter circuit disclosed in another embodiment of the application;
Fig. 3 is the DC side bus schematic diagram of three-phase inverter;
Fig. 4 is the circuit diagram of a kind of filter circuit disclosed in another embodiment of the application;
Fig. 5 is the circuit diagram of a kind of filter circuit disclosed in another embodiment of the application;
Fig. 6 is the circuit diagram of a kind of filter circuit disclosed in another embodiment of the application;
Fig. 7 is the circuit diagram of a kind of filter circuit disclosed in another embodiment of the application;
Fig. 8 is the circuit diagram of a kind of filter circuit disclosed in another embodiment of the application;
Fig. 9 is the circuit diagram of a kind of filter circuit disclosed in another embodiment of the application;
Figure 10 is a kind of structural topology figure of the three-phase inverter that the application provides;
Figure 11 is the another kind of structural topology figure of the three-phase inverter that the application provides;
Figure 12 is the another kind of structural topology figure of the three-phase inverter that the application provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, be clearly and completely described the technical scheme in the embodiment of the present application, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
The embodiment of the present application provides a kind of filter circuit and three-phase inverter, with solve that existing three-phase inverter exists because of can not effective attenuation common-mode voltage, cause common mode current inhibition undesirable, and grid-connected current is easy to the problem of generation resonance phenomena.
First it should be noted that, filter circuit disclosed in the embodiment of the present application, is applied to three-phase inverter.
A kind of filter circuit disclosed in the embodiment of the present application, as depicted in figs. 1 and 2, comprising:
Resistance sense branch road and the filter inductance L be connected in each phase of described three-phase inverter and filter capacitor C1; Concrete, described resistance sense branch road comprises the first damping resistance R0 in parallel and the first inductance L 0.
It should be noted that, in filter circuit disclosed in the present embodiment, described resistance sense branch road has two kinds of types of attachment.Concrete, see Fig. 1, described resistance sense branch road one end connects the common port of three-phase filter capacitor C1, and the other end is for connecting arbitrary level of the DC side bus of described three-phase inverter.
Or, see Fig. 2, each described resistance sense branch road that is in series of described three-phase inverter, and the common port of three-phase filter capacitor C1 is for connecting arbitrary level of the DC side bus of described three-phase inverter.
Concrete, each described resistance sense branch road that is in series of described three-phase inverter can be: the filter inductance L be connected in each phase connects one end of described resistance sense branch road, the other end of described resistance sense branch road connects filter capacitor C1, now, the common port of three-phase filter capacitor C1 is for connecting arbitrary level of the DC side bus of described three-phase inverter.
Can certainly be: one end of described resistance sense branch road connects the filter capacitor C1 in each phase that now, the other end of described resistance sense branch road is for connecting arbitrary level of the DC side bus of described three-phase inverter.Now, the common port of the resistance sense branch road on three-phase is for connecting arbitrary level of the DC side bus of described three-phase inverter.
There is provided in a kind of filter circuit in the application, the first damping resistance in resistance sense branch road can effective attenuation common-mode voltage, improves inhibition, and improves the resonance phenomena in common mode loop.And; first damping resistance is after the first inductance in parallel; in filter circuit, part common mode loop flows through the first inductance and flows into DC bus; first inductance plays the effect of shunting; decrease the electric current flowing through the first damping resistance; thus reduce the power loss of damping resistance, improve the operational efficiency of three-phase inverter.
Also it should be noted that, arbitrary level of the DC side bus of described three-phase inverter can be as shown in Figure 3.
And, current three-phase inverter, in order to increase direct current then voltage utilization, widen MPPT (maximum power tracing, maximum power point track) range of operation of voltage, the carrier modulation method of many employings Vector Modulation algorithm or third-harmonic zero-sequence voltage mode, cause all existing in filter circuit a larger third harmonic voltage, third harmonic voltage can produce circulation in mid point loop.In order to reduce the loss of circulation on damping resistance R0, be incorporated to the first inductance L 0, allow low-order harmonic electric current be entered arbitrary level of the DC side bus of three-phase inverter by the first inductance L 0, thus allow damping resistance R0 only flow through switching harmonics electric current and resonance current.
Preferably, in another embodiment of the application, also comprise in filter circuit: resonant circuit in parallel with the first inductance L 0 and in parallel with described damping resistance R0, as shown in Figure 4 and Figure 5.
In the present embodiment, described resonant circuit makes common mode circulation breaker in middle ripple current by resonant circuit, reduces the electric current flowing through damping resistance R0 further, thus reduces the power loss of damping resistance R0 further.
Concrete, in this programme, described resonant circuit specifically can comprise the second inductance L r and the second electric capacity Cr, and wherein, the second inductance L r and the second electric capacity Cr connects, as shown in Figure 6 and Figure 7.
Another embodiment of the application also discloses a kind of filter circuit, comprising: resistance sense branch road and be connected to filter inductance L and the filter capacitor C1 of described each phase of three-phase inverter; Also comprise:
3rd electric capacity C4, concrete, the 3rd electric capacity C4 can adopt star connection or delta connection to be connected on described three-phase inverter three-phase, specifically see Fig. 8 and Fig. 9.Wherein,
Described resistance sense branch road comprises the first damping resistance R0 in parallel and the first inductance L 0;
Described resistance sense branch road one end connects the common port of three-phase filter capacitor C1, and the other end is for connecting arbitrary level of the DC side bus of described three-phase inverter; Or, each described resistance sense branch road that is in series of described three-phase inverter, and the common port of three-phase filter capacitor C1 is for connecting arbitrary level of the DC side bus of described three-phase inverter.
Preferably, in another embodiment of the application, the 3rd electric capacity C4 connects the second damping resistance, and, the 3rd inductance that described second damping resistance can also be in parallel.
Another embodiment of the application also discloses a kind of three-phase inverter, comprises DC side, inversion unit and filter circuit, and wherein, described filter circuit comprises:
Resistance sense branch road and be connected to filter inductance and the filter capacitor of described each phase of three-phase inverter; Wherein,
Described resistance sense branch road comprises the first damping resistance in parallel and the first inductance;
Described resistance sense branch road one end connects the common port of three-phase filter capacitor, and the other end is for connecting arbitrary level of the DC side bus of described three-phase inverter; Or, each described resistance sense branch road that is in series of described three-phase inverter, and the common port of three-phase filter capacitor is for connecting arbitrary level of the DC side bus of described three-phase inverter.
Preferably, in another embodiment of the application, the filter circuit in described three-phase inverter also comprises: with described first inductance in parallel and the resonant circuit in parallel with described first damping resistance.
Concrete, described resonant circuit can comprise: the second inductance of series connection and the second electric capacity.
Preferably, in another embodiment of the application, the filter circuit in described three-phase inverter also comprises: employing star connection or delta connection are connected to the 3rd electric capacity on described three-phase inverter three-phase.
Concrete, the 3rd electric capacity C4 connects the second damping resistance, and, the 3rd inductance that described second damping resistance can also be in parallel.
The particular content of filter circuit in three-phase inverter disclosed in the above embodiments of the present application, see the content of the embodiment of corresponding filter circuit, can repeat no more herein.
In the embodiment of the present application, the three-phase inversion implement body provided can but be not limited to the three-phase inverter of full-bridge topologies, such as, the three-phase inverter of two Level Full Bridge topological structures as shown in Figure 10.
In the embodiment of the present application, the three-phase inversion implement body provided can but be not limited to the three-phase inverter of three-phase " T " font topological structure, the three-phase inverter of such as, three-phase " T " font three-level topology structure shown in Figure 11.
In the embodiment of the present application, the three-phase inversion implement body provided can but be not limited to the three-phase inverter of three-phase " 1 " font topological structure, such as, the three-phase inverter of three-phase " 1 " font three-level topology structure as shown in figure 12.
It should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the application.Be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the application, can realize in other embodiments.Therefore, the application can not be restricted to these embodiments shown in this article, but will meet the most wide region consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a filter circuit, is applied to three-phase inverter, it is characterized in that, comprising: resistance sense branch road and be connected to filter inductance and the filter capacitor of described each phase of three-phase inverter; Wherein,
Described resistance sense branch road comprises the first damping resistance in parallel and the first inductance;
Described resistance sense branch road one end connects the common port of three-phase filter capacitor, and the other end is for connecting arbitrary level of the DC side bus of described three-phase inverter; Or, each described resistance sense branch road that is in series of described three-phase inverter, and the common port of three-phase filter capacitor is for connecting arbitrary level of the DC side bus of described three-phase inverter.
2. filter circuit according to claim 1, is characterized in that, also comprises:
With described first inductance in parallel and the resonant circuit in parallel with described first damping resistance.
3. filter circuit according to claim 2, is characterized in that, described resonant circuit comprises:
Second inductance of series connection and the second electric capacity.
4. according to the filter circuit in claim 1-3 described in any one, it is characterized in that, also comprise:
Employing star connection or delta connection are connected to the 3rd electric capacity on described three-phase inverter three-phase.
5. filter circuit according to claim 4, is characterized in that, also comprises: with the second damping resistance of described 3rd capacitances in series.
6. filter circuit according to claim 5, is characterized in that, also comprises: three inductance in parallel with described second damping resistance.
7. a three-phase inverter, is characterized in that, comprising: as the filter circuit in claim 1-6 as described in any one.
8. three-phase inverter according to claim 7, it is characterized in that, the type of described three-phase inverter comprises: the three-phase inverter of full-bridge topologies, the three-phase inverter of three-phase " T " font topological structure and the three-phase inverter of three-phase " 1 " font topological structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420758216.XU CN204244065U (en) | 2014-12-04 | 2014-12-04 | Filter circuit and three-phase inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420758216.XU CN204244065U (en) | 2014-12-04 | 2014-12-04 | Filter circuit and three-phase inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204244065U true CN204244065U (en) | 2015-04-01 |
Family
ID=52773507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420758216.XU Active CN204244065U (en) | 2014-12-04 | 2014-12-04 | Filter circuit and three-phase inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204244065U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022223386A1 (en) * | 2021-04-19 | 2022-10-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Power converter circuit |
-
2014
- 2014-12-04 CN CN201420758216.XU patent/CN204244065U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022223386A1 (en) * | 2021-04-19 | 2022-10-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Power converter circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104201920A (en) | Common mode circuit, three-phase inverter and photovoltaic power generation system | |
| CN103715930B (en) | A kind of method promoting flexible direct current power transmission system capacity | |
| CN103066587B (en) | A kind of Optimal Configuration Method of modular multi-level flexible direct current system | |
| CN103606917B (en) | Non-sine ac transmission is used to promote the transmission system of urban distribution network conveying capacity | |
| CN103051236A (en) | CHB cascaded photovoltaic inverter circuit based on three-phase multi-split transformer | |
| CN104811071A (en) | Photovoltaic inverter and passive decoupling restraining method based on non-isolated LCL filtering | |
| CN107634659B (en) | A kind of control method expanding the operation area mixed type MMC | |
| CN104410310A (en) | Neutral point clamped H-bridge photovoltaic inverter and method for inhibiting common mode leakage current | |
| CN204046460U (en) | A kind of novel Modularized multi-level converter sub-module topology | |
| CN206727903U (en) | A kind of AuCT, traction power unit and vehicle | |
| CN204244065U (en) | Filter circuit and three-phase inverter | |
| CN107404244B (en) | Improve the PWM method of three-phase photovoltaic inverter output current harmonics characteristic | |
| CN102931854A (en) | Cascaded high-voltage inverter | |
| CN110504850A (en) | A kind of fairing and its circulation inhibition method | |
| CN106300340B (en) | A kind of flexibility multimode switching device and its control method | |
| CN102983586B (en) | A kind of HVDC based on three-level voltage source converter holds concurrently UPFC system | |
| CN205453532U (en) | Five inverter and application circuit thereof | |
| CN204168134U (en) | A kind of many level grid-connected inverters filtering system | |
| CN204168178U (en) | The parallelly connected reverse converter system of current monitoring device and common DC bus | |
| CN203813687U (en) | Device for increasing output voltage of Z source three-level neutral point clamping type inverter | |
| CN104795980B (en) | Direct-current voltage ripple compensation system and method based on variable carrier SPWM (sinusoidal pulse width modulation) method | |
| CN102263520A (en) | Circuit, method and convertor for converting direct voltage into alternating voltage | |
| CN207039194U (en) | Efficient cascade H bridge type dynamic electric voltage recovery devices | |
| CN206117292U (en) | Energy changes confession device topology | |
| CN204407896U (en) | A kind of active power filtering and reactive-compensation comprehensive device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |