CN204615658U - Full-bridge recommends variable inverter - Google Patents
Full-bridge recommends variable inverter Download PDFInfo
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- CN204615658U CN204615658U CN201520346694.4U CN201520346694U CN204615658U CN 204615658 U CN204615658 U CN 204615658U CN 201520346694 U CN201520346694 U CN 201520346694U CN 204615658 U CN204615658 U CN 204615658U
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- Prior art keywords
- former limit
- switching tube
- full
- bridge
- inverter
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Abstract
The utility model provides a kind of full-bridge to recommend variable inverter, comprise former limit inverter circuit, secondary side rectification circuit, described former limit inverter circuit comprises input power, the negative pole of input power connects second switch pipe, 3rd switching tube, the drain electrode of the 4th switching tube, the positive pole of input power connects the first switching tube, the drain electrode of the 5th switching tube, first switching tube, the source shorted of second switch pipe is to the upper end on the former limit of transformer first, the lower end on the first former limit is connected with the upper end on the second former limit, the source electrode of the 3rd switching tube connects the upper end on the second former limit, 4th switching tube, the source electrode of the 5th switching tube connects the lower end on the second former limit.This full-bridge is recommended variable inverter and is allowed by full-bridge inverter input range wide, and be applicable to photovoltaic distributed generating occasion, the voltage stress of device is little, and conversion efficiency is high, and voltage regulation performance is good, and structure is simple, and control easily, stability is strong, and cost is lower, easily realizes.
Description
Technical field
The utility model relates to a kind of full-bridge and recommends variable inverter, belongs to the straight convertor field in electrical energy changer.
Background technology
In recent years, along with the development of generation of electricity by new energy, intelligent grid etc., along with the wide input of the input voltage brought, the problems such as photovoltaic array voltage fluctuation is large need solution badly.This problem unresolved, variable inverter technology receives more and more concern, and variable inverter tool has the following advantages: (1) allows input range wide; (2) photovoltaic distributed generating occasion is applicable to; (3) compared to the immutable converter of tradition, the voltage stress of its device is little, and conversion efficiency is high, and voltage regulation performance is good.Current, wide region input translator mainly comprises forward topology structure, two kinds, full-bridge DC/DC structure.Forward converter is used widely in low pressure, big current, large-power occasions, but forward converter main switch will bear the input voltage of twice, single tube forward conversion circuit is made to be unsuitable for the occasion of higher input, now two-transistor forward converter does not then have this problem, its main switch voltage stress is input voltage, be the half of single tube normal shock, therefore two-transistor forward converter can be used widely in high-line input voltage occasion.But because duty cycle of switching can not more than 50%, so limit the application in wide region input occasion.The magnetic utilance of full-bridge circuit transformer is higher, and also comparatively forward converter raising is a lot of for power grade.In middle low power occasion, full-bridge DC/DC converter is used widely, particularly phase-shifted full-bridge converter, with its advantage such as efficiency height and low EMI, is used widely.But ZVS is more difficult for phase-shifted full-bridge converter lagging leg, duty-cycle loss, former limit reactive circular power flow problem is difficult to overcome.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of wide region input translator advantage that can retain can overcome again the full-bridge that traditional wide region inputs topological weak point and recommend variable inverter.
For achieving the above object and other relevant objects, the utility model provides a kind of full-bridge to recommend variable inverter, comprise former limit inverter circuit, secondary side rectification circuit, described former limit inverter circuit comprises input power, the negative pole of input power connects second switch pipe, 3rd switching tube, the drain electrode of the 4th switching tube, the positive pole of input power connects the first switching tube, the drain electrode of the 5th switching tube, first switching tube, the source shorted of second switch pipe is to the upper end on the former limit of transformer first, the lower end on the first former limit is connected with the upper end on the second former limit, the source electrode of the 3rd switching tube connects the upper end on the second former limit, 4th switching tube, the source electrode of the 5th switching tube connects the lower end on the second former limit, the described former limit of transformer first, first secondary of the first former limit and described transformer, second secondary coupling.
Preferably, described secondary side rectification circuit comprises the first secondary of described transformer, the upper end of the first secondary connects the anode of the first diode, the lower end of the first secondary is connected with the upper end of the second secondary, the lower end of the second secondary is connected with the anode of the second diode, the negative electrode of the first diode is connected with the negative electrode of the second diode and is shorted to one end of inductance, the shorted on one end of the other end of inductance and electric capacity and load, and the other end short circuit of electric capacity and load is also connected to the lower end of secondary.
As mentioned above, full-bridge of the present utility model is recommended variable inverter and is had following beneficial effect: this full-bridge is recommended variable inverter and full-bridge inverter and push-pull circuit are synthesized a topology, achieve the function of the variable inverse parallel operation of wide region input, this full-bridge is recommended variable inverter and is allowed input range wide full-bridge inverter, be applicable to photovoltaic distributed generating occasion, the voltage stress of device is little, conversion efficiency is high, voltage regulation performance is good, and structure is simple, control easily, stability is strong, cost is lower, easily realizes.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the utility model embodiment.
Fig. 2 is the view of the utility model embodiment operation mode 1.
Fig. 3 is the view of the utility model embodiment operation mode 2.
Fig. 4 is the view of the utility model embodiment operation mode 3.
Fig. 5 is the view of the utility model embodiment operation mode 4.
Fig. 6 is the view of the utility model embodiment operation mode 5.
Fig. 7 is the view of the utility model embodiment operation mode 6.
Fig. 8 is the view of the utility model embodiment operation mode 7.
Fig. 9 is the view of the utility model embodiment operation mode 8.
Embodiment
Below by way of specific instantiation, execution mode of the present utility model is described, those skilled in the art the content disclosed by this specification can understand other advantages of the present utility model and effect easily.The utility model can also be implemented or be applied by embodiments different in addition, and the every details in this specification also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present utility model.
Refer to Fig. 1 to Fig. 9.It should be noted that, the diagram provided in the present embodiment only illustrates basic conception of the present utility model in a schematic way, then only the assembly relevant with the utility model is shown in graphic but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
As shown in Figure 1, the utility model provides a kind of full-bridge to recommend variable inverter, comprises former limit inverter circuit 1, secondary side rectification circuit 2 two parts, and its limit, Central Plains inverter circuit comprises input power U
dcinput power U
dcnegative pole meet second switch pipe S
2, the 3rd switching tube S
3, the 4th switching tube S
4drain electrode, input power U
dcpositive pole meet the first switching tube S
1, the 5th switching tube S
5drain electrode, the first switching tube S
1, second switch pipe S
2source shorted to the former limit N of transformer first
1upper end, the first former limit N
1lower end and the second former limit N
2upper end be connected, the 3rd switching tube S
3source electrode connect the second former limit N
2upper end, the 4th switching tube S
4, the 5th switching tube S
5source electrode connect the second former limit N
2lower end, the former limit N of transformer first
1, the first former limit N
2with the first secondary N of transformer
3, the second secondary N
4coupling.
Secondary side rectification circuit comprises the first secondary N of described transformer
3, the first secondary N
3upper end connect the first diode D
1anode, the first secondary N
3lower end and the second secondary N
4upper end be connected, the second secondary N
4lower end and the second diode D
2anode be connected, the first diode D
1negative electrode and the second diode D
2negative electrode be connected and be shorted to one end of inductance L, the other end of inductance L and the shorted on one end of electric capacity C and load R, the other end short circuit of electric capacity C and load R is also connected to secondary N
3lower end.
Be divided into eight operation intervals during utility model works, below in conjunction with accompanying drawing, specific works principle of the present utility model and operation mode be described in detail.
operation mode 1: as shown in Figure 2, the first power switch tube S
1with the 4th power switch tube S
4open-minded, rest switch pipe all turns off, and energy is through input power U
dc, the first power switch tube S
1, the 4th power switch tube S
4, transformer primary side N
1limit N former in transformer first
2be transferred to the second secondary N
3, the first secondary N
3by energy through the first power diode D
1, output inductor L and output filter capacitor C outputs to load R.
operation mode 2: as shown in Figure 3, all power switch pipes in former limit all turn off, the first secondary N
3, outputting inductance L by energy through the second secondary N
4, the first power diode D
1, the second power diode D
2discharge to load R with filter capacitor C.
operation mode 3: as shown in Figure 4, the second power switch tube S
3,5th power switch tube S
5open-minded, rest switch pipe all turns off, and energy is through power supply U
dc, the second power switch tube S
3,5th power switch tube S
5, the former limit N of transformer first
1limit N former in transformer second
2be transferred to the second secondary N
4, the second secondary N
4by energy through the second power diode D
2, output inductor L and output filter capacitor C outputs to load R.
operation mode 4: as shown in Figure 5, all power switch pipes in former limit all turn off, transformer first secondary N
3, outputting inductance L by energy through the second secondary N
4, the first power diode D
1, the second power diode D
2discharge to load R with filter capacitor C.
operation mode 5:as shown in Figure 6, the first power switch tube S
1with the 3rd power switch tube S
3open-minded, energy is through power supply U
dc, the first power switch tube S
1,3rd power switch tube S
3, the former limit N of transformer first
1be transferred to the first secondary N
3, the first secondary N
3by energy through the first power diode D
1, output inductor L and output filter capacitor C outputs to load R.
operation mode 6:as shown in Figure 7, all power switch pipes in former limit all turn off, transformer first secondary N
3, outputting inductance L by energy through the second secondary N
4, the first power diode D
1, the second power diode D
2discharge to load R with filter capacitor C.
operation mode 7:as shown in Figure 8, the 3rd power switch tube S
3with the 5th power switch tube S
5open-minded, energy is through power supply U
dc, the 3rd power switch tube S
3,5th power switch tube S
5, the former limit N of transformer second
2be transferred to the second secondary N
4, the second secondary N
4by energy through the second power diode D
2, output inductor L and output filter capacitor C outputs to load R.
operation mode 8:as shown in Figure 9, all power switch pipes in former limit all turn off, transformer first secondary N
3, outputting inductance L by energy through the second secondary N
4, the first power diode D
1, the second power diode D
2discharge to load R with filter capacitor C.
Seen from the above description, this full-bridge is recommended variable inverter and full-bridge inverter and push-pull circuit is synthesized a topology, achieves the function of the variable inverse parallel operation of wide region input, this full-bridge is recommended variable inverter and is allowed input range wide full-bridge inverter, be applicable to photovoltaic distributed generating occasion, the voltage stress of device is little, and conversion efficiency is high, voltage regulation performance is good, and structure is simple, control easily, stability is strong, cost is lower, easily realizes.So the utility model effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or changes.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that the utility model discloses, must be contained by claim of the present utility model.
Claims (2)
1. full-bridge recommends a variable inverter, comprises former limit inverter circuit, secondary side rectification circuit, it is characterized in that: described former limit inverter circuit comprises input power (U
dc) input power (U
dc) negative pole meet second switch pipe (S
2), the 3rd switching tube (S
3), the 4th switching tube (S
4) drain electrode, input power (U
dc) positive pole meet the first switching tube (S
1), the 5th switching tube (S
5) drain electrode, the first switching tube (S
1), second switch pipe (S
2) source shorted to the former limit (N of transformer first
1) upper end, the first former limit (N
1) lower end and the second former limit (N
2) upper end be connected, the 3rd switching tube (S
3) source electrode connect the second former limit (N
2) upper end, the 4th switching tube (S
4), the 5th switching tube (S
5) source electrode connect the second former limit (N
2) lower end, the former limit (N of described transformer first
1), the first former limit (N
2) with the first secondary (N of described transformer
3), the second secondary (N
4) coupling.
2. full-bridge according to claim 1 recommends variable inverter, it is characterized in that: described secondary side rectification circuit comprises the first secondary (N of described transformer
3), the first secondary (N
3) upper end connect the first diode (D
1) anode, the first secondary (N
3) lower end and the second secondary (N
4) upper end be connected, the second secondary (N
4) lower end and the second diode (D
2) anode be connected, the first diode (D
1) negative electrode and the second diode (D
2) negative electrode be connected and be shorted to one end of inductance (L), the other end of inductance (L) and the shorted on one end of electric capacity (C) and load (R), the other end short circuit of electric capacity (C) and load (R) is also connected to secondary (N
3) lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520346694.4U CN204615658U (en) | 2015-05-26 | 2015-05-26 | Full-bridge recommends variable inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520346694.4U CN204615658U (en) | 2015-05-26 | 2015-05-26 | Full-bridge recommends variable inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204615658U true CN204615658U (en) | 2015-09-02 |
Family
ID=53968181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520346694.4U Expired - Fee Related CN204615658U (en) | 2015-05-26 | 2015-05-26 | Full-bridge recommends variable inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204615658U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836448A (en) * | 2015-05-26 | 2015-08-12 | 苏州弘鹏新能源有限公司 | Full bridge push-pull variable inverter |
| CN115882733A (en) * | 2023-02-21 | 2023-03-31 | 成都必控科技有限责任公司 | Topological circuit combining full-bridge switching power supply and push-free switching power supply |
-
2015
- 2015-05-26 CN CN201520346694.4U patent/CN204615658U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836448A (en) * | 2015-05-26 | 2015-08-12 | 苏州弘鹏新能源有限公司 | Full bridge push-pull variable inverter |
| CN115882733A (en) * | 2023-02-21 | 2023-03-31 | 成都必控科技有限责任公司 | Topological circuit combining full-bridge switching power supply and push-free switching power supply |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20180526 |