CN200969560Y - Time-sharing composite high-frequency combination type single-phase DC/AC inverse circuit - Google Patents
Time-sharing composite high-frequency combination type single-phase DC/AC inverse circuit Download PDFInfo
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- CN200969560Y CN200969560Y CN 200620047875 CN200620047875U CN200969560Y CN 200969560 Y CN200969560 Y CN 200969560Y CN 200620047875 CN200620047875 CN 200620047875 CN 200620047875 U CN200620047875 U CN 200620047875U CN 200969560 Y CN200969560 Y CN 200969560Y
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Abstract
The utility model provides a time-sharing composite high-frequency combination-type single-phase DC/AC invert circuit, which is characterized in that the positive output terminal of equivalent DC power supply is connected together with the positive output terminal of DC converter and the negative output terminal of the converter, the negative output terminal of the equivalent DC power supply is connected with the negative input terminal of the DC converter, the positive output terminal of the DC converter and the negative output terminal of the equivalent DC power supply are used as the concatenated output of the DC converter and the equivalent DC power supply and connected with the input terminal of the output converter. When the utility model is operated, much energy of the equivalent DC power supply is directly flowed into a power network or a load without through high frequency chopper wave, overall machine efficiency is improved, and the volume is reduced greatly; the control characteristics of the circuit and the efficiency of a boost circuit are increased by the reduction of the step-up ratio of the circuit, meanwhile, the utility model has relatively simple structure as well as higher performance price ratio and power density.
Description
Technical field
The utility model relates to a kind of single-phase DC/AC inverter circuit, particularly a kind of combined single-phase DC/AC inverter circuit of timesharing High Frequency Of Recombination.
Background technology
Along with the growing tension of traditional energy, the application of novel clean energy resource (as solar energy, fuel cell) generating obtains promoting gradually.A distinguishing feature of this class energy is that input voltage and input power excursion are very big.With the solar cell is example, and same Battery pack plate is under different illumination conditions, and its VD can differ one times at the most.This type of power supply inserts single-phase load or electrical network, must have an energy to keep the constant single-phase DC/AC inverter circuit of output single phase alternating current (A.C.) voltage as interface in big input voltage range.
The circuit of realizing above function at present mainly contains two big classes:
One, isolated form; Two, non-isolation type.Wherein isolated form can be divided into, and adopts the high frequency transformer isolated form and adopts the Industrial Frequency Transformer isolated form.The advantage of isolated form is to realize the electrical isolation of electrical network and solar cell, thereby security of system is good; No-load voltage ratio by the design transformer is easier to realize voltage transformation, thereby control is simple relatively.But because all power will pass through transformer, thereby the efficient of system reduces relatively.Non-isolation type mainly adopts the BOOST booster circuit to realize boosting, wherein prime BOOST booster circuit and back level full-bridge inverter two-stage circuit in the same time time-sharing work pattern of only a kind of circuit working under the high frequency state to improving the solar inverter efficient meaning of having large improvement, when but its prime BOOST circuit is lower than the line voltage peak value at the direct voltage of solar cell output, must export the steamed bun waveform, this to control brought big difficulty (particularly the output voltage when solar cell is lower, the step-up ratio of BOOST circuit near or greater than 2 o'clock); When DC input voitage was low, the decrease in efficiency of complete machine was obvious simultaneously.
At isolated form and non-isolation type pluses and minuses separately, the someone proposes part isolated form translation circuit.This circuit has two independent DC converter between sun-generated electric power and output stage, the input of these two DC converter is attempted by the positive and negative two ends of solar DC power supply, their output is cascaded, combination generates single-phase full wave rectification steamed bun ripple DC voltage waveform, again through the output stage paraphase, keep the constant single-phase sinusoidal voltage of output, incorporate single-phase load or AC network into.Because adopted two converters to finish the combined DC/DC conversion of timesharing High Frequency Of Recombination, so complex structure, the utilance of device is lower, cost is higher relatively.
Summary of the invention
The utility model is at the deficiency with top isolated form inverter circuit technology, proposes a kind of combined single-phase DC/AC inverter circuit of timesharing High Frequency Of Recombination of part isolated form of compactness.
The technical solution adopted in the utility model is as follows:
The positive and negative two ends of solar cell link to each other with the positive-negative input end of DC converter, and the output negative terminal of DC converter links to each other with the input anode of this converter, and are flat with the output DC of raising converter; So be output as the single-phase full wave commutating voltage waveform of band direct current platform between the output plus terminal of converter and the negative terminal of solar cell; With of copped wave, the paraphase of this output voltage, generate single-phase sinusoidal voltage output again, incorporate single phase alternating current (A.C.) electrical network or load into through band LC filtering output translator.
Beneficial effect
The utlity model has following technique effect:
1, with respect to traditional isolated form DC/AC inverter, a big chunk energy of solar energy Equivalent DC power supply flows directly into electrical network without high frequency chopping, has improved overall efficiency and volume and has also reduced a lot.
2, the combined DC/AC inverter circuit of the timesharing High Frequency Of Recombination of forming with respect to tradition band prime BOOST booster circuit and back level full-bridge inverter, the utility model directly links to each other with the input anode of this converter because of the output negative terminal of DC converter, thereby the output DC of having raised DC converter is flat, therefore the step-up ratio of booster circuit descends a lot, the control characteristic of circuit and the efficient of booster circuit are improved, thereby higher cost performance and power density are arranged.
3, with respect to traditional part isolated form DC/AC inverter, the DC converter circuit obtains simplifying, and the utilance of device is improved, and the reliability of device is improved.
Description of drawings
Fig. 1 the utility model structured flowchart;
Fig. 2 the utility model embodiment 1;
Fig. 3 the utility model embodiment 2.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Referring to Fig. 1,1 is solar energy Equivalent DC power supply, the positive input terminal of output that it is positive and DC converter 2 and the negative output terminal of this converter link together, and an input of the output translator 3 of the output that Equivalent DC power supply 1 is negative and the negative input end of DC converter 2 and band LC filtering links together; The positive output of DC converter 2 and another input of output translator 3 link together.The negative output terminal of the positive output end of DC converter 2 and Equivalent DC power supply 1 is connected with the input of output translator 3 as both cascade output of DC converter 2 and Equivalent DC power supply 1.The output of output translator 3 links together with single phase alternating current (A.C.) or load 4 two ends respectively.
During the utility model operation work, the output voltage of Equivalent DC power supply 1 is fed to the input of DC converter 2, because the negative output terminal of DC converter 2 links to each other with positive input terminal, the output DC of having raised DC converter 2 is flat, so the output voltage U dc between the negative terminal of the positive output end of DC converter 2 and Equivalent DC power supply 1 is the single-phase full wave commutating voltage waveform of band direct current platform; Then, this voltage U dc feed-in band LC filtering output translator 3 through copped wave, the paraphase of output translator 3, generates single-phase sinusoidal voltage Uac output; At last, this voltage U ac incorporates single phase alternating current (A.C.) electrical network or load 4 into.
Embodiment one
As shown in Figure 2, entire circuit comprises four major parts, and is corresponding with the structured flowchart among Fig. 1, one, Equivalent DC power supply 1; Two, DC converter 2; Three, output translator 3; Four, single-phase load or electrical network 4.Wherein DC converter 2 is by switching tube VT1, fly-wheel diode VD1, and inductance L 1, switching tube VTh1～VTh4, high frequency transformer T1, rectifier diode VD2～VD5, capacitor C 1 is formed; Output translator 3 is by switching tube VTL1～VTL4, inductance L 2, and capacitor C 2 is formed.The drain electrode of the switching tube VT1 of the anode of Equivalent DC power supply 1 and DC converter 2, rectifier diode VD4, the anode of VD5 links to each other.The anode of the fly-wheel diode VD1 of the negative terminal of Equivalent DC power supply 1 and DC converter 2, the source electrode of switching tube VTh3 and VTh4, and the emitter of the switching tube VTL3 of output translator 3 and VTL4 links to each other.The source electrode of switching tube VT1 links to each other with an end of inductance L 1 and the negative electrode of fly-wheel diode VD1.The other end of inductance L 1 links to each other with the drain electrode of switching tube VTh1 and VTh2.The source electrode of switching tube VTh1 is connected with an end of the drain electrode of VTh3 and high frequency transformer T1 input; The source electrode of switching tube VTh2 is connected with the other end of the drain electrode of VTh4 and high frequency transformer T1 input.Rectifier diode VD2～VD5 forms rectifier bridge, it exchanges the input two ends and links to each other with the output two ends of high frequency transformer T1 respectively, the negative terminal of its direct current output links to each other with the anode of Equivalent DC power supply 1 and an end of capacitor C 1, the anode of its direct current output and the switching tube VTL1 of output translator 3, the other end of the collector electrode of VTL2 and capacitor C 1 links to each other.The emitter of switching tube VTL1, the collector electrode of switching tube VTL3, an end of an end of capacitor C 2 and single-phase load or electrical network 4 links to each other.The emitter of switching tube VTL2 links to each other with the collector electrode of switching tube VTL4 and an end of inductance L 2.The other end of inductance L 2, the other end of the other end of capacitor C 2 and single-phase load or electrical network 4 links to each other.
The input dc power corrugating Udc of output translator 3 as shown in Figure 1, it is produced jointly by Equivalent DC power supply 1 and DC converter 2.When Udc numerical value during less than DC power supply voltage Vin, the switching tube Close All of DC converter 2, the voltage of Equivalent DC power supply 1 directly is added to the input two ends of output translator 3 by the rectifier bridge of DC converter 2, the action of the switching tube high frequency of output translator 3, and obtain this period by inductance L 2 and capacitor C 2 filtering and incorporate single-phase load or electrical network 4 needed alternating voltage waveform Uac into as shown in Figure 1; When Udc numerical value during greater than DC power supply voltage Vin, wherein the sinusoidal steamed bun ripple of Udc-Vin part by the switching tube of DC converter 2 with the input direct voltage high frequency chopping after by transformer T1, rectifier diode VD2～VD5 rectification and capacitor C 1 filtering produce, this part steamed bun ripple and input direct voltage Vin cascade are added in the input two ends of output translator 3 together, one of output translator 3 tiltedly to switching tube (VTL1 and VTL4 at this moment, or VTL1 and VTL4) be in conducting state always, incorporate single-phase load or electrical network 4 needed alternating voltage waveform Uac into as shown in Figure 1 through obtaining this period after inductance L 2 and the capacitor C 2.With respect to traditional isolated form DC/AC inverter, a big chunk energy of DC power supply flows directly into electrical network without high frequency chopping, and overall efficiency and volume all reduce a lot.With respect to the combined DC/AC inverter circuit of tradition band prime BOOST booster circuit with the timesharing High Frequency Of Recombination of back level full-bridge inverter composition, the step-up ratio of DC converter descends a lot, the efficient of the control characteristic of circuit and DC/DC booster circuit is improved, thereby higher cost performance and power density are arranged.With respect to traditional part isolated form DC/AC inverter, the DC converter circuit obtains simplifying, and the utilance of device is improved, and the reliability of device is improved.
Embodiment two
As shown in Figure 3, entire circuit comprises four major parts, and is corresponding with the structured flowchart among Fig. 1, one, Equivalent DC power supply 1; Two, DC converter 2; Three, output translator 3; Four, single-phase load or electrical network 4.Wherein DC converter 2 is by switching tube VTh1～VTh4, high frequency transformer T1, and rectifier diode VD1～VD4, inductance L 1, capacitor C 1 is formed; Output translator 3 is by switching tube VTL1～VTL4, inductance L 2, and capacitor C 2 is formed.The switching tube VT1 of the anode of Equivalent DC power supply 1 and DC converter 2, the drain electrode of VTH2, and rectifier diode VD3, the anode of VD4 links to each other.The switching tube VTh3 of the negative terminal of Equivalent DC power supply 1 and DC converter 2 and the source electrode of VTh4, and the emitter of the switching tube VTL3 of output translator 3 and VTL4 links to each other.The source electrode of switching tube VTh1 is connected with an end of the drain electrode of VTh3 and high frequency transformer T1 input; The source electrode of switching tube VTh2 is connected with the other end of the drain electrode of VTh4 and high frequency transformer T1 input.Rectifier diode VD1～VD4 forms rectifier bridge, it exchanges the input two ends and links to each other with the output two ends of high frequency transformer T1 respectively, the negative terminal of its direct current output links to each other with the anode of Equivalent DC power supply 1 and an end of capacitor C 1, and the anode of its direct current output is connected with an end of inductance L 1.The switching tube VTL1 of the other end of the other end of inductance L 1 and capacitor C 1 and output translator 3, the collector electrode of VTL2 is connected.The emitter of switching tube VTL1, the collector electrode of switching tube VTL3, an end of an end of capacitor C 2 and single-phase load or electrical network 4 links to each other.The emitter of switching tube VTL2 links to each other with the collector electrode of switching tube VTL4 and an end of inductance L 2.The other end of inductance L 2, the other end of the other end of capacitor C 2 and single-phase load or electrical network 4 links to each other.
The input dc power corrugating Udc of output translator 3 as shown in Figure 1, it is produced jointly by Equivalent DC power supply 1 and DC converter 2.When Udc numerical value during less than DC power supply voltage Vin, the switching tube Close All of DC converter 2, the voltage of Equivalent DC power supply 1 directly passes through the rectifier bridge of DC converter 2, capacitor C 1 and inductance L 1 are added to the input two ends of output translator 3, the action of the switching tube high frequency of output translator 3, and obtain this period by inductance L 2 and capacitor C 2 filtering and incorporate single-phase load or electrical network 4 needed alternating voltage waveform Uac into as shown in Figure 1; When Udc numerical value during greater than DC power supply voltage Vin, wherein the sinusoidal steamed bun ripple of Udc-Vin part by the switching tube of DC converter 2 with the input direct voltage high frequency chopping after by transformer T1, rectifier diode VD1～VD4 rectification, inductance L 1 and capacitor C 1 filtering produce, this part steamed bun ripple and input direct voltage Vin cascade are added in the input two ends of output translator 3 together, one of output translator 3 tiltedly to switching tube (VTL1 and VTL4 at this moment, or VTL1 and VTL4) be in conducting state always, incorporate single-phase load or electrical network 4 needed alternating voltage waveform into through obtaining this period after inductance L 2 and the capacitor C 2.With respect to traditional isolated form DC/AC inverter, a big chunk energy of DC power supply flows directly into electrical network without high frequency chopping, and overall efficiency and volume all reduce a lot.Combined DC/AC inverter circuit with respect to tradition band prime BOOST booster circuit and the back grade timesharing High Frequency Of Recombination that the full-bridge inverter two-stage circuit is formed, the step-up ratio of cascade converter descends a lot, the efficient of the control characteristic of circuit and DC/DC booster circuit is improved, thereby higher cost performance and power density are arranged.With respect to traditional part isolated form DC/AC inverter, the DC converter circuit obtains simplifying, and the utilance of device is improved, and the reliability of device is improved.
Claims (2)
1. one kind comprises Equivalent DC power supply (1), and the combined single-phase DC/AC inverter circuit of the timesharing High Frequency Of Recombination of DC converter (2) and output translator (3) is characterized in that:
A. the positive input terminal of DC converter (2) is connected with negative output terminal;
B. the negative output terminal of the positive output end of DC converter (2) and Equivalent DC power supply (1) is connected with the input of output translator (3) as both the cascade output of DC converter (2) and Equivalent DC power supply (1).
2. the combined single-phase DC/AC inverter circuit of timesharing High Frequency Of Recombination according to claim 1 is characterized in that DC converter (2) can be the full-bridge isolated converter, forward converter, and anti exciting converter, PUSH-PULL circuit or half-bridge are isolated inverter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620047875 CN200969560Y (en) | 2006-11-16 | 2006-11-16 | Time-sharing composite high-frequency combination type single-phase DC/AC inverse circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620047875 CN200969560Y (en) | 2006-11-16 | 2006-11-16 | Time-sharing composite high-frequency combination type single-phase DC/AC inverse circuit |
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| CN200969560Y true CN200969560Y (en) | 2007-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200620047875 Expired - Fee Related CN200969560Y (en) | 2006-11-16 | 2006-11-16 | Time-sharing composite high-frequency combination type single-phase DC/AC inverse circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847939A (en) * | 2009-03-26 | 2010-09-29 | Abb研究有限公司 | Method for controlling single-phase dc/ac converters and converter arrangement |
| CN102198348A (en) * | 2011-06-01 | 2011-09-28 | 江苏东益节能科技股份有限公司 | Special automatic control filter device for fluff in dyestuff wastewater |
| CN115694203A (en) * | 2022-11-17 | 2023-02-03 | 深圳市迪威电气有限公司 | Direct-current isolated converter capable of bidirectional conversion and control method thereof |
-
2006
- 2006-11-16 CN CN 200620047875 patent/CN200969560Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847939A (en) * | 2009-03-26 | 2010-09-29 | Abb研究有限公司 | Method for controlling single-phase dc/ac converters and converter arrangement |
| CN101847939B (en) * | 2009-03-26 | 2012-12-19 | Abb研究有限公司 | Method for controlling single-phase dc/ac converters and converter arrangement |
| CN102198348A (en) * | 2011-06-01 | 2011-09-28 | 江苏东益节能科技股份有限公司 | Special automatic control filter device for fluff in dyestuff wastewater |
| CN115694203A (en) * | 2022-11-17 | 2023-02-03 | 深圳市迪威电气有限公司 | Direct-current isolated converter capable of bidirectional conversion and control method thereof |
| CN115694203B (en) * | 2022-11-17 | 2023-08-04 | 深圳市迪威电气有限公司 | DC isolated converter capable of bidirectional conversion and control method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |