CN201758366U - Low-voltage push-pull inversion direct DC-AC conversion circuit - Google Patents
Low-voltage push-pull inversion direct DC-AC conversion circuit Download PDFInfo
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- CN201758366U CN201758366U CN2010202752274U CN201020275227U CN201758366U CN 201758366 U CN201758366 U CN 201758366U CN 2010202752274 U CN2010202752274 U CN 2010202752274U CN 201020275227 U CN201020275227 U CN 201020275227U CN 201758366 U CN201758366 U CN 201758366U
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Abstract
The utility model provides a low-voltage push-pull inversion direct DC-AC conversion circuit, which comprises an inverter circuit, a transformer circuit and a filter circuit. Inputted low-voltage direct current is converted into low-voltage alternating-current pulse voltage by leading a power MOSFET in the inverter circuit to work in a quasi resonant soft switching state, and the low-voltage alternating pulse voltage is further converted into high-voltage alternating-current pulse voltage by the aid of the transformer circuit and converted into sinusoidal half-wave voltage or square-wave voltage with a 220V effective value by the filer circuit. The low-voltage push-pull inversion direct DC-AC conversion circuit with the design scheme according to resonant soft switching and working frequency inversion working principle has the advantages of simple structure, easy realization, high universality, higher frequency and the like.
Description
Technical field
The utility model relates to a kind of direct DC-AC translation circuit, and particularly a kind of low pressure is recommended the direct DC-AC translation circuit of inversion.
Background technology
Application scenario in storage battery and solar cell power supply, because the direct voltage grade of input is lower, often be+12VDC ,+24VDC or the like, be not inconsistent with the power supply grade of the electric equipment of using always, therefore, often need to adopt the DC-AC converter that boosts that the low-voltage dc voltage of importing is converted to AC sine wave voltage or the ac square-wave voltage that effective value is 220V.The higher DC-AC converter of output voltage generally all needs the isolation high frequency transformer that boosts, there is a DC link that has rectifier bridge and electrochemical capacitor to constitute in the capital, and output needs the inverter of high frequency chopping, thereby exists design complicated, the huge and efficient of complete machine is low wait not enough.
How to improve the deficiency of existing DC-AC converter, become the technical task that those skilled in the art need to be resolved hurrily in fact.
The utility model content
The purpose of this utility model is to provide the simple low pressure of a kind of circuit structure to recommend the direct DC-AC translation circuit of inversion.
Reach other purposes in order to achieve the above object, low pressure of the present utility model is recommended the direct DC-AC translation circuit of inversion, comprise: two groups of half-waves that produce sinusoidal forward half-wave that first-harmonic is a power frequency and negative half-wave respectively form circuit, wherein, two groups of half-waves form the output series connection of circuit so that the output all-wave, and each group half-wave forms circuit and comprises: be used for will input low-voltage dc voltage be converted to the inverter circuit that comprises power MOSFET tube of PWM potential pulse that first-harmonic is the high frequency low voltage of power frequency; Be connected the inverter circuit output and by with the drain-source of the power MOSFET of inverter circuit between parasitic capacitance produce resonance the PWM potential pulse electromagnetic coupled of the high frequency low voltage that inserts is become first-harmonic be the transformer circuit of the high voltagehigh frequency voltage of power frequency; And be connected the output of transforming circuit and comprise high speed diode and first electrochemical capacitor, so that will obtain the filter circuit that first-harmonic is the half-wave of power frequency after the high voltagehigh frequency voltage commutation that insert and the filtering, wherein, half-wave is sine wave or square wave.
Wherein, inverter circuit all comprises: be attempted by second electrochemical capacitor of input and be connected the two MOSFET pipe of described second electrochemical capacitor, one end.
Wherein, transformer circuit comprises a transformer and the inductance that is connected transformer secondary output winding one end, and wherein, the two ends of described primary winding are connected with MOSFET pipe respectively, and tap connects the other end of described second electrochemical capacitor in the middle of it.
Wherein, filter circuit comprises: input is respectively with the corresponding transformer secondary output winding other end and inductance is connected and the rectifier bridge that is made of 4 high speed diodes, the RC filter circuit that is connected in parallel on described rectification bridge output end, wherein, described RC filtered electrical routing capacitance, first electrochemical capacitor and resistance are formed in parallel.
In sum, the direct DC-AC translation circuit that low pressure of the present utility model is recommended inversion makes that power MOSFET is operated in the quasi-resonance soft switch state in the inverter circuit, low-voltage direct with input is converted to the low-voltage alternating-current pulse voltage thus, be converted to the high-voltage alternating pulse voltage by transforming circuit again, and be converted to half-sinusoid voltage or the square-wave voltage that effective value is 220V by filter circuit, this circuit design is according to resonant type soft-switch and power frequency inversion operation principle, designed low pressure and recommended the direct DC-AC translation circuit design of inversion, had simple in structure, realize easily, highly versatile, efficient is than advantages such as height.
Description of drawings
Fig. 1 recommends the circuit diagram of the direct DC-AC translation circuit of inversion for low pressure of the present utility model.
Embodiment
The direct DC-AC translation circuit that low pressure of the present utility model recommends inversion below with reference to accompanying drawing is described in detail.
See also Fig. 1, the direct DC-AC translation circuit that low pressure of the present utility model is recommended inversion mainly comprises: inverter circuit 1, transformer circuit 2 and filter circuit 3.
Described inverter circuit 1 comprises two groups, is made up of electrochemical capacitor E1, power MOSFET tube S1, S2 for one group, and another group is made up of electrochemical capacitor E2, power MOSFET tube S3, S4; Described transformer circuit 2 also comprises two groups, and one group is made of transformer HFT1 and inductance L 1, and one group is made of transformer HFT2 and inductance L 2; Described filter circuit 3 also comprises two groups, is made up of high speed diode D1-D4, capacitor C 1, electrochemical capacitor E3 and resistance R 1 for one group, and another group is made up of high speed diode D5-D8, capacitor C 2, electrochemical capacitor E4.
In inverter circuit 1, the drain electrode of power MOSFET S1 links to each other with an end of the elementary winding of high frequency transformer HFT1, the drain electrode of power MOSFET S2 links to each other with the other end of the elementary winding of high frequency transformer HFT1, the drain electrode of power MOSFET S3 links to each other with an end of the elementary winding of high frequency transformer HFT2, the drain electrode of power MOSFET S4 links to each other with the other end of the elementary winding of transforming circuit medium-high frequency transformer HFT2, after linking to each other with the center-side of the elementary winding of high frequency transformer HFT1, the anode of electrochemical capacitor E1 links to each other with input voltage is anodal, after linking to each other with the center-side of the elementary winding of high frequency transformer HFT2, the anode of electrochemical capacitor E2 links to each other with input voltage is anodal, the source electrode of power MOSFET S1 links to each other with the source electrode of power MOSFET S2 and links to each other with the input voltage negative pole after the back links to each other with the negative electrode of electrochemical capacitor E1, and the source electrode of power MOSFET S3 links to each other with the source electrode of power MOSFET S4 and links to each other with the input voltage negative pole after the back links to each other with the negative electrode of electrochemical capacitor E2.
In transformer circuit, one end of flat surface transformer HFT1 secondary winding links to each other with the end of resonant inductance L1, the anode of the other end of resonant inductance L1 and filter circuit high speed diode D1, the negative electrode of high speed diode D3 links to each other, the anode of the other end of flat surface transformer HFT1 secondary winding and filter circuit high speed diode D2, the negative electrode of high speed diode D4 links to each other, one end of flat surface transformer HFT2 secondary winding links to each other with the end of resonant inductance L2, the negative electrode of the other end of resonant inductance L2 and filter circuit high speed diode D5, the anode of high speed diode D7 links to each other, the negative electrode of the other end of flat surface transformer HFT2 secondary winding and filter circuit high speed diode D6, the anode of high speed diode D4 links to each other.
In filter circuit, the negative electrode of high speed diode D1, the negative electrode of high speed diode D2, the anode of electrochemical capacitor E3, the end of ac capacitor C1, one end of resistance R 1 links to each other with an ac output end L after linking to each other, the negative electrode of high speed diode D7, the negative electrode of high speed diode D8, the anode of electrochemical capacitor E4, the end of ac capacitor C2, one end of resistance R 2 link to each other back and another ac output end-link to each other the anode of high speed diode D3, the anode of high speed diode D4, the anode of high speed diode D5, the anode of high speed diode D6, the negative electrode of electrochemical capacitor E3, the negative electrode of electrochemical capacitor E4, the other end of ac capacitor C1, the other end of resistance R 1 links to each other.
The operation principle of foregoing circuit is:
In the inverter circuit, adopt tradition to recommend the PWM modulation algorithm, one group of S1 and S2, one group of S3 and S43 can be transformed into the PWM potential pulse that first-harmonic is the high frequency low voltage of power frequency with the low-voltage dc voltage of input, are back level transforming circuit power supply.In the transformer circuit, the high frequency flat surface transformer of two parameter unanimities, the first-harmonic that receives input respectively is the PWM potential pulse of the high frequency low voltage of power frequency, through electromagnetic coupled independently, exporting first-harmonic separately is the high voltagehigh frequency voltage of power frequency.In the filter circuit,, obtain half-sinusoid or square wave that first-harmonic is a power frequency by high speed diode and electrochemical capacitor rectification and filter action.Wherein, the independent converter work that power MOSFETS 1～S2, high frequency transformer HFT1, resonant inductance L1, high speed diode D1～D4, electrochemical capacitor E3 etc. constitute, export positive half cycle voltage waveform, the independent converter work that power MOSFET S3～S4, high frequency transformer HFT2, resonant inductance L2, high speed diode D5～D8, electrochemical capacitor E4 etc. constitute, output negative half period voltage waveform, two parts are taked time-sharing work, cycle is the output cycle, and the output voltage series connection constitutes ac output voltage.Whole device is finished the conversion by low-voltage dc voltage-High AC voltage, need not DC link.
Transforming circuit midplane transformer resonance inductance is converted the transmission electric capacity generation resonance effect between the drain-source of elementary, equivalent elementary leakage inductance and power MOSFET S1～S4, by selecting suitable resonant inductance amount size, make resonance frequency equal switching frequency, the no-voltage that can realize power MOSFET S1～S4 open and be fully loaded with near zero-current switching, reduce switching loss and reduce the EMI noise.In order further to raise the efficiency and to reduce volume, high frequency transformer adopts high performance flat surface transformer.
Each resistance, diode, transformer, inductance all require to have high-performance in the above-mentioned device; The parameter of an embodiment of the utility model is: input direct voltage 12VDC, output AC voltage effective value are AC sinusoidal voltage or the ac square-wave voltage of 220VAC.Electrochemical capacitor E1 and E2 get 4x3300 μ F respectively, 16V, and actual separately two parallel connections disperse to arrange nearby.Electrochemical capacitor E3 and E4 get 1x47 μ F, 400V.Grading resistor R1 and R2 get 5.1k Ω, 1W.High speed diode D1～D8 is KSQ15A06B, and snap back recovers, and actual two parallel connections are installed on radiator.Power MOSFET S1～S4 gets IRF3205, and actual separately three parallel connections are installed on radiator.Ac capacitor C1～C2 gets 1x0.1 μ F, 400V.Flat surface transformer is EE43, elementary 2 circles, secondary 44 circles.Resonant inductance L1 gets 300 μ H, ampacity 5A.
In sum, low pressure of the present utility model is recommended the direct DC-AC translation circuit of inversion by inverter circuit, transforming circuit and filter circuit are that the part of three interwovenesses is formed, its essence is exactly: inverter circuit 1 is finished the conversion of direct current low amplitude value voltage to high frequency low amplitude value alternating voltage, it is the high amplitude alternating voltage of high frequency that transforming circuit is responsible for high frequency low amplitude value AC voltage conversion, and be transported to filter circuit, parasitic capacitance generation resonance between the drain-source of power MOSFET in resonant inductance in the while transforming circuit and leakage inductance and the inverter circuit, can realize Zero-voltage soft switch and near fully loaded zero-current soft switch, reduce switching loss.The use of flat surface transformer can reduce volume and raise the efficiency, and the series connection of elementary winding can be simplified the design of transformer.Obviously, this circuit have simple in structure, realize easily, highly versatile, efficient be than advantages such as height.
The foregoing description just lists expressivity principle of the present utility model and effect is described, but not is used to limit the utility model.Any personnel that are familiar with this technology all can make amendment to the foregoing description under spirit of the present utility model and scope.Therefore, rights protection scope of the present utility model should be listed as claims.
Claims (5)
1. a low pressure is recommended the direct DC-AC translation circuit of inversion, it is characterized in that comprising that two groups produce sinusoidal forward half-wave that first-harmonic is a power frequency respectively and the half-wave of negative half-wave forms circuit, wherein, two groups of half-waves form the output series connection of circuit so that export all-wave, and each group half-wave formation circuit comprises:
The inverter circuit that comprises power MOSFET tube is used for the low-voltage dc voltage of input is converted to the PWM potential pulse that first-harmonic is the high frequency low voltage of power frequency;
Transformer circuit is connected the inverter circuit output, by with the drain-source of the power MOSFET of inverter circuit between parasitic capacitance produce resonance the PWM potential pulse electromagnetic coupled of the high frequency low voltage that inserts is become first-harmonic be the high voltagehigh frequency voltage of power frequency;
Filter circuit is connected the output of transforming circuit, comprises the high speed diode and first electrochemical capacitor, so that obtain the half-wave half-wave that first-harmonic is a power frequency respectively, wherein half-wave is sine wave or square wave with the high voltagehigh frequency voltage commutation that inserts and filtering.
2. low pressure as claimed in claim 1 is recommended the direct DC-AC translation circuit of inversion, and it is characterized in that: inverter circuit comprises: be attempted by second electrochemical capacitor of input and be connected the two MOSFET pipe of described second electrochemical capacitor, one end.
3. low pressure as claimed in claim 2 is recommended the direct DC-AC translation circuit of inversion, it is characterized in that: transformer circuit comprises a transformer and is connected the inductance of transformer secondary output winding one end, wherein, the two ends of described primary winding are connected with MOSFET pipe respectively, and tap connects the other end of described second electrochemical capacitor in the middle of it.
4. low pressure as claimed in claim 3 is recommended the direct DC-AC translation circuit of inversion, it is characterized in that: transformer is a flat surface transformer.
5. recommend the direct DC-AC translation circuit of inversion as claim 3 or 4 described low pressure, it is characterized in that: filter circuit comprises: input is respectively with the corresponding transformer secondary output winding other end and inductance is connected and the rectifier bridge that is made of 4 high speed diodes, the RC filter circuit that is connected in parallel on described rectification bridge output end, wherein, described RC filtered electrical routing capacitance, first electrochemical capacitor and resistance are formed in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202752274U CN201758366U (en) | 2010-07-29 | 2010-07-29 | Low-voltage push-pull inversion direct DC-AC conversion circuit |
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| CN2010202752274U CN201758366U (en) | 2010-07-29 | 2010-07-29 | Low-voltage push-pull inversion direct DC-AC conversion circuit |
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| CN201758366U true CN201758366U (en) | 2011-03-09 |
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| CN2010202752274U Expired - Lifetime CN201758366U (en) | 2010-07-29 | 2010-07-29 | Low-voltage push-pull inversion direct DC-AC conversion circuit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347704A (en) * | 2010-07-29 | 2012-02-08 | 上海儒竞电子科技有限公司 | Low voltage push-pull inversion direct DC-AC conversion circuit |
| CN102510647A (en) * | 2011-11-01 | 2012-06-20 | 北京工业大学 | Double inverter power supply used for large-power electronic ballast |
| CN105337505A (en) * | 2015-11-12 | 2016-02-17 | 深圳市泰昂能源科技股份有限公司 | DC/DC conversion circuit and power supply device |
| CN106253735A (en) * | 2016-09-21 | 2016-12-21 | 陈钢 | Charging and the step inverter of brake energy recovery is driven for electric automobile |
| CN107147291A (en) * | 2017-06-15 | 2017-09-08 | 山东大学 | A kind of non-isolated Sofe Switch high step-up ratio DC converter and its method |
| CN109951094A (en) * | 2017-12-08 | 2019-06-28 | 南京德朔实业有限公司 | Power supply device |
| CN110086354A (en) * | 2019-05-09 | 2019-08-02 | 江苏理工学院 | Single-phase double push-pull booster circuit and step-up method based on silicon carbide MOSFET |
-
2010
- 2010-07-29 CN CN2010202752274U patent/CN201758366U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347704A (en) * | 2010-07-29 | 2012-02-08 | 上海儒竞电子科技有限公司 | Low voltage push-pull inversion direct DC-AC conversion circuit |
| CN102347704B (en) * | 2010-07-29 | 2015-08-19 | 儒竞艾默生环境优化技术（上海）有限公司 | The direct DC-AC conversion circuit of low voltage push-pull inversion |
| CN102510647A (en) * | 2011-11-01 | 2012-06-20 | 北京工业大学 | Double inverter power supply used for large-power electronic ballast |
| CN105337505A (en) * | 2015-11-12 | 2016-02-17 | 深圳市泰昂能源科技股份有限公司 | DC/DC conversion circuit and power supply device |
| CN106253735A (en) * | 2016-09-21 | 2016-12-21 | 陈钢 | Charging and the step inverter of brake energy recovery is driven for electric automobile |
| CN106253735B (en) * | 2016-09-21 | 2019-05-31 | 陈钢 | The step inverter of charging and brake energy recycling is driven for electric car |
| CN107147291A (en) * | 2017-06-15 | 2017-09-08 | 山东大学 | A kind of non-isolated Sofe Switch high step-up ratio DC converter and its method |
| CN109951094A (en) * | 2017-12-08 | 2019-06-28 | 南京德朔实业有限公司 | Power supply device |
| CN110086354A (en) * | 2019-05-09 | 2019-08-02 | 江苏理工学院 | Single-phase double push-pull booster circuit and step-up method based on silicon carbide MOSFET |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: RUKING EMERSON CLIMATE TECHNOLOGY (SHANGHAI) CO., Free format text: FORMER OWNER: SHANGHAI RUKING ELECTRONIC SCIENCE + TECHNOLOGY CO., LTD. Effective date: 20140805 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140805 Address after: 200433 room 323, No. 1101-163, National Road, Shanghai, Yangpu District Patentee after: Emerson environment optimization technology (Shanghai) Co., Ltd. Address before: 200433 Shanghai City, Yangpu District National Road No. 335 Building No. 2, 1803, 1805, 1806, 1807. Patentee before: Shanghai Ruking Electronic Science & Technology Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20110309 |
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| CX01 | Expiry of patent term |