CN201422082Y - Circuit capable of switching DC voltage to AC voltage - Google Patents
Circuit capable of switching DC voltage to AC voltage Download PDFInfo
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- CN201422082Y CN201422082Y CN 200920108583 CN200920108583U CN201422082Y CN 201422082 Y CN201422082 Y CN 201422082Y CN 200920108583 CN200920108583 CN 200920108583 CN 200920108583 U CN200920108583 U CN 200920108583U CN 201422082 Y CN201422082 Y CN 201422082Y
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Abstract
A circuit capable of switching DC voltage to AC voltage comprises an inverter and a DC current supply formed by a solar generator and a capacitor. The inverter comprises six switch devices, six diodesconnected in parallel with the switch devices respectively, a seventh diode, an eighth diode, a first inductor and a second inductor; the first, the third and the fifth switch devices are connected at the two ends of the capacitor in series; the second, the fourth and the sixth switch devices are connected at the two ends of the capacitor in series; the negative pole of the seventh diode is connected to the first end of the third switch device, and the positive pole thereof is connected to the second end of the fourth switch device; the negative pole of the eighth diode is connected to the first end of the fourth switch device, and the positive pole thereof is connected to second end of the third switch device; the first end of the first inductor is connected to the second end of the fourth switch device; the first end of the second inductor is connected to the second end of the third switch device; and the second ends of the first inductor and the second inductor are connected to both ends of an alternating load or to the commercial power, so as to reduce electromagnetic interference.
Description
Technical field
The utility model relates to the solar energy generation technology field, and particularly a kind of direct voltage is converted to the circuit of alternating voltage, and it has realized that direct current is converted to the function of interchange, and has avoided occurring on the input terminal high frequency voltage, has realized the high efficiency conversion simultaneously.
Background technology
As everyone knows, exchanging the conversion D.C. regulated power supply, has been mature technique comparatively, and is converted to the inverter of alternating voltage by direct voltage, start late, and the main low-frequency transformer that uses of early stage design, but volume is big and heavy, and efficient is also low.
Nowadays the existing method that the direct voltage of photoelectricity DC source is converted to alternating voltage, but have that efficient is low, occur the problem of high frequency voltage on the input terminal easily, patent 200510079923.1 is the methods that the direct voltage of direct voltage source are converted to alternating voltage, it has realized the function that the direct current conversion exchanges, and avoided the high frequency voltage (the EMV problem is little) that occurs on the input terminal, realized high efficiency conversion simultaneously.
Therefore, how to design the circuit that a kind of direct current conversion exchanges, and also can overcome the high frequency voltage that occurs on the input terminal, reach the function of high efficiency conversion, be the direction place that this case inventor institute desire solves.
Summary of the invention
Main purpose of the present utility model provides a kind of circuit of converting direct-current voltage into alternating-current voltage, and it has avoided occurring on the input terminal high frequency voltage, has realized high efficiency conversion simultaneously.
In order to achieve the above object, the utility model provides a kind of circuit of converting direct-current voltage into alternating-current voltage, and it comprises a direct current current source and an inverter, and described DC current source comprises a solar generator and an electric capacity, it is characterized in that described inverter comprises:
Six switching devices, it has one first end and one second end respectively, second end of described first switching device is connected in first end of described the 3rd switching device, second end of described the 3rd switching device is connected in first end of described the 5th switching device, first end of described first switching device and second end of described the 5th switching device are connected to the two ends of described electric capacity, second end of described second switch device is connected in first end of described the 4th switching device, second end of described the 4th switching device is connected in first end of described the 6th switching device, and first end of described second switch device and second end of described the 6th switching device are connected to the two ends of described electric capacity;
Six diodes, it is connected anti-parallel to the two ends of described six switching devices respectively;
One the 7th diode, the negative pole of described the 7th diode are connected in first end of described the 3rd switching device, and the positive pole of described the 7th diode is connected in second end of the 4th switching device;
One the 8th diode, the negative pole of described the 8th diode are connected in first end of the 4th switching device, and the positive pole of described the 8th diode is connected in second end of the 3rd switching device;
One first inductance, first end of described first inductance is connected in second end of described the 4th switching device; And
One second inductance, first end of described second inductance is connected in second end of described the 3rd switching device, and second end of described first inductance and second end of second inductance are connected in the two ends of AC load or are connected in civil power.
Preferable, described first switching device, described second switch device, described the 5th switching device and described the 6th switching device are the switching tubes of selecting symmetry for use.
Preferable, described switching tube is the MOSFET pipe.
Preferable, the 3rd switching device and described the 4th switching device are the IGBT pipe.
Preferable, described the 3rd switching device, the 4th switching device are triggered with the output frequency of 50Hz.
Preferable, described first switching device, second switch device, the 5th switching device and the 6th switching device are with pulse signal in the KHz scope and the signal triggering of 50Hz.
Preferable, the pulse signal of described KHz is 20KHz.
The beneficial effects of the utility model are: the terminal board and the civil power side of the utility model input when high frequency switches do not have high frequency voltage, reduced electromagnetic interference, thereby the efficient of making and stability are higher.
Description of drawings
Fig. 1 is a circuit layout of the present utility model;
The civil power that Fig. 2 connects for the utility model inverter output for just or as voltage source independently just be output as, high frequency trigger signal is 1 o'clock current circuit;
The civil power that Fig. 3 connects for the utility model inverter output for just or as voltage source independently just be output as, high frequency trigger signal is 0 o'clock current circuit;
The civil power that Fig. 4 connects for the utility model inverter output is for negative or to be output as negative, high frequency trigger signal as voltage source independently be 1 o'clock current circuit;
The civil power that Fig. 5 connects for the utility model inverter output is for negative or to be output as negative, high frequency trigger signal as voltage source independently be 0 o'clock current circuit.
Description of reference numerals: 1-DC current source; The 2-inverter; The SG-solar generator; S1-first switching device; S2-second switch device; S3-the 3rd switching device; S4-the 4th switching device; S5-the 5th switching device; S6-the 6th switching device; D1-first diode; D2-second diode; D3-the 3rd diode; D4-the 4th diode; D5-the 5th diode; D6-the 6th diode; D7-the 7th diode; D8-the 8th diode; L1-the one or two inductance; L2-second inductance.
Embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the utility model is above-mentioned.
As described in Figure 1, the circuit of described converting direct-current voltage into alternating-current voltage comprises a direct current current source 1 and an inverter 2, and described DC current source comprises a solar generator SG and a capacitor C 1;
Described inverter 2 comprises: six switching device S1-S6 and six diode D1-D6; Wherein, described six diode D1-D6, be connected anti-parallel to the two ends of described switching device S1-S6 respectively, promptly the first diode D1 is connected anti-parallel to the two ends of the first switching device S1, the two ends that the second diode D2 is connected anti-parallel to second switch device S2, the two ends that the 3rd diode D3 is connected anti-parallel to the 3rd switching device S3, the two ends that the 4th diode D4 is connected anti-parallel to the 4th switching device S4, the two ends that the 5th diode D5 is connected anti-parallel to the 5th switching device S5, the two ends that the 6th diode D6 is connected anti-parallel to the 6th switching device S6;
Described six switching device S1-S6 have one first end and one second end respectively, second end of the described first switching device S1 is connected in first end of the 3rd switching device S3, second end of the 3rd switching device S3 is connected in first end of the 5th switching device S5, and second end of first end of the first switching device S1 and the 5th switching device S5 is connected to the two ends of capacitor C 1; Second end of described second switch device S2 is connected in first end of the 4th switching device S4, second end of described the 4th switching device S4 is connected in first end of the 6th switching device S6, and second end of first end of described second switch device S2 and described the 6th switching device S6 is connected to the two ends of capacitor C 1;
Described inverter 2 also comprises one first inductance L 1 and one second inductance L 2, first end of described first inductance L 1 is connected in second end of the 4th switching device S4, first end of described second inductance L 2 is connected in second end of the 3rd switching device S3, and second end of second end of described first inductance L 1 and second inductance L 2 is connected in the two ends of AC load or is connected in civil power;
Described inverter 2 also comprises one the 7th diode D7 and one the 8th diode D8, the negative pole of described the 7th diode D7 is connected in first end of described the 3rd switching device S3, the positive pole of described the 7th diode D7 is connected in second end of the 4th switching device S4, the negative pole of described the 8th diode D8 is connected in first end of the 4th switching device S4, and the positive pole of described the 8th diode D8 is connected in second end of the 3rd switching device S3.
When described inverter 2 switches described the 3rd switching device S3 and the 4th switching device S4 with the civil power output frequency of 50Hz, the first switching device S1, second switch device S2, the 5th switching device S5 and the 6th switching device S6 be for example the high frequency modulated pulse signal of 20KHz and the signal triggering of 50Hz in a KHz scope then.
The civil power that connects when 2 outputs of described inverter for just or conduct independently voltage source be output as timing, the 4th switching device S4 is open-minded, the first switching device S1, the 3rd switching device S3, the 6th switching device S6 turn-off, and second switch device S2, the 5th switching device S5 are triggered with the high-frequency signal as 20KHz in the KHz scope.When high frequency trigger signal is 1, second switch device S2, the 5th switching device S5 conducting, current circuit as shown in Figure 2, if the civil power that connects of output, midpoint potential and the civil power midpoint potential of then importing DC source are idiostatic.When high frequency trigger signal is 0, second switch device S2, the 5th switching device S5 ends, current circuit as shown in Figure 3, if what output connect is civil power, then the midpoint potential of civil power be by and the first switching device S1, second switch device S2, the dividing potential drop decision of the 5th switching device S5 and the 6th switching device S6, because the first switching device S1, second switch device S2, the 5th switching device S5 and the 6th switching device S6 are the switching tubes of selecting symmetry for use, so the midpoint potential of civil power is identical with the midpoint potential of input DC source, the terminal board of described inverter 2 input when high frequency switches and civil power side (if inverter output connect be civil power) do not have high frequency voltage, have reduced electromagnetic interference.
The civil power that connects when 2 outputs of described inverter is for negative or be output as when negative as voltage source independently, the 3rd switching device S3 is open-minded, second switch device S2, the 4th switching device S4, the 5th switching device S5 turn-off, and the first switching device S1, the 6th switching device S6 are triggered with the high-frequency signal as 20KHz in the KHz scope.When high frequency trigger signal is 1, the first switching device S1, the 6th switching device S6 conducting, current circuit as shown in Figure 4, if the civil power that connects of output, midpoint potential and the civil power midpoint potential of then importing DC source are idiostatic.When high frequency trigger signal is 0, the first switching device S1, the 6th switching device S6 ends, current circuit as shown in Figure 5, if what output connect is civil power, then the midpoint potential of civil power be by and the first switching device S1, second switch device S2, the dividing potential drop decision of the 5th switching device S5 and the 6th switching device S6, because the first switching device S1, second switch device S2, the 5th switching device S5 and the 6th switching device S6 are the switching tubes of selecting symmetry for use, so the midpoint potential of civil power is identical with the midpoint potential of input DC source, thereby the terminal board of inverter input when high frequency switches and civil power side (if inverter output connect be civil power) do not have high frequency voltage, have reduced electromagnetic interference.
Wherein, for the efficient of inverter 2 is provided, the MOSFET pipe that the first switching device S1, second switch device S2, the 5th switching device S5 and the 6th switching device S6 can select same model is as switching device, and the 3rd switching device S3 and the 4th switching device S4 then select IGBT as switching device.
More than explanation is just illustrative for the utility model; and it is nonrestrictive; those of ordinary skills understand; under the situation of the spirit and scope that do not break away from following claims and limited; can make many modifications; change, or equivalence, but all will fall in the protection range of the present utility model.
Claims (7)
1. the circuit of a converting direct-current voltage into alternating-current voltage, it comprises a direct current current source and an inverter, and described DC current source comprises a solar generator and an electric capacity, it is characterized in that, and described inverter comprises:
Six switching devices, it has one first end and one second end respectively, second end of described first switching device is connected in first end of described the 3rd switching device, second end of described the 3rd switching device is connected in first end of described the 5th switching device, first end of described first switching device and second end of described the 5th switching device are connected to the two ends of described electric capacity, second end of described second switch device is connected in first end of described the 4th switching device, second end of described the 4th switching device is connected in first end of described the 6th switching device, and first end of described second switch device and second end of described the 6th switching device are connected to the two ends of described electric capacity;
Six diodes, it is connected anti-parallel to the two ends of described six switching devices respectively;
One the 7th diode, the negative pole of described the 7th diode are connected in first end of described the 3rd switching device, and the positive pole of described the 7th diode is connected in second end of described the 4th switching device;
One the 8th diode, the negative pole of described the 8th diode are connected in first end of the 4th switching device, and the positive pole of described the 8th diode is connected in second end of described the 3rd switching device;
One first inductance, first end of described first inductance is connected in second end of described the 4th switching device; And
One second inductance, first end of described second inductance is connected in second end of described the 3rd switching device, and second end of described first inductance and second end of second inductance are connected in the two ends of AC load or are connected in civil power.
2. the circuit of converting direct-current voltage into alternating-current voltage according to claim 1 is characterized in that, described first switching device, described second switch device, described the 5th switching device and described the 6th switching device are the switching tubes of selecting symmetry for use.
3. the circuit of converting direct-current voltage into alternating-current voltage according to claim 2 is characterized in that, described switching tube is the MOSFET pipe.
4. the circuit of converting direct-current voltage into alternating-current voltage according to claim 1 is characterized in that, the 3rd switching device and described the 4th switching device are the IGBT pipe.
5. the circuit of converting direct-current voltage into alternating-current voltage according to claim 1 is characterized in that, described the 3rd switching device, the 4th switching device are triggered with the output frequency of 50Hz.
6. the circuit of converting direct-current voltage into alternating-current voltage according to claim 1, it is characterized in that described first switching device, second switch device, the 5th switching device and the 6th switching device are with pulse signal in the KHz scope and the signal triggering of 50Hz.
7. the circuit of converting direct-current voltage into alternating-current voltage according to claim 6 is characterized in that, the pulse signal of described KHz is 20KHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920108583 CN201422082Y (en) | 2009-06-04 | 2009-06-04 | Circuit capable of switching DC voltage to AC voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920108583 CN201422082Y (en) | 2009-06-04 | 2009-06-04 | Circuit capable of switching DC voltage to AC voltage |
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| CN201422082Y true CN201422082Y (en) | 2010-03-10 |
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| CN 200920108583 Expired - Lifetime CN201422082Y (en) | 2009-06-04 | 2009-06-04 | Circuit capable of switching DC voltage to AC voltage |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010139187A1 (en) * | 2009-06-04 | 2010-12-09 | 北京昆兰新能源技术有限公司 | Circuit for converting dc voltage to ac voltage |
| CN102237815A (en) * | 2011-03-29 | 2011-11-09 | 杭州浙大桑尼能源科技有限公司 | High-efficiency and reliable direct-current to alternating-current conversion circuit |
| CN102427310A (en) * | 2011-10-25 | 2012-04-25 | 阳光电源股份有限公司 | Single-phase inverter |
| CN102427311A (en) * | 2011-10-25 | 2012-04-25 | 阳光电源股份有限公司 | Single-phase inverter |
| CN102427312A (en) * | 2011-10-25 | 2012-04-25 | 阳光电源股份有限公司 | Single-phase inverter |
| CN102437757A (en) * | 2011-10-25 | 2012-05-02 | 阳光电源股份有限公司 | Single-phase inverter |
| CN102545682A (en) * | 2011-12-29 | 2012-07-04 | 阳光电源股份有限公司 | Single-phase inverter |
| CN102570878A (en) * | 2011-12-29 | 2012-07-11 | 阳光电源股份有限公司 | Single-phase inverter |
| CN103051169A (en) * | 2012-12-24 | 2013-04-17 | 江苏兆伏新能源有限公司 | Reactive power control method of inverter topology circuit |
| CN103199722A (en) * | 2012-01-06 | 2013-07-10 | 苏州欧姆尼克新能源科技有限公司 | Method used for offering reactive compensation to single-phase photovoltaic grid-connected inverter |
| CN103888009A (en) * | 2014-03-26 | 2014-06-25 | 深圳科士达科技股份有限公司 | Single-phase three-level photovoltaic inverter system |
| CN104836471A (en) * | 2014-02-12 | 2015-08-12 | 江苏物联网研究发展中心 | Inversion circuit and uninterrupted power supply circuit |
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2009
- 2009-06-04 CN CN 200920108583 patent/CN201422082Y/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010139187A1 (en) * | 2009-06-04 | 2010-12-09 | 北京昆兰新能源技术有限公司 | Circuit for converting dc voltage to ac voltage |
| CN101908831B (en) * | 2009-06-04 | 2012-05-23 | 北京昆兰新能源技术有限公司 | Circuit for converting direct-current voltage into alternating-current voltage |
| CN102237815A (en) * | 2011-03-29 | 2011-11-09 | 杭州浙大桑尼能源科技有限公司 | High-efficiency and reliable direct-current to alternating-current conversion circuit |
| CN102427310A (en) * | 2011-10-25 | 2012-04-25 | 阳光电源股份有限公司 | Single-phase inverter |
| CN102427311A (en) * | 2011-10-25 | 2012-04-25 | 阳光电源股份有限公司 | Single-phase inverter |
| CN102427312A (en) * | 2011-10-25 | 2012-04-25 | 阳光电源股份有限公司 | Single-phase inverter |
| CN102437757A (en) * | 2011-10-25 | 2012-05-02 | 阳光电源股份有限公司 | Single-phase inverter |
| CN102570878A (en) * | 2011-12-29 | 2012-07-11 | 阳光电源股份有限公司 | Single-phase inverter |
| CN102545682A (en) * | 2011-12-29 | 2012-07-04 | 阳光电源股份有限公司 | Single-phase inverter |
| CN102570878B (en) * | 2011-12-29 | 2014-05-21 | 阳光电源股份有限公司 | Single-phase inverter |
| CN102545682B (en) * | 2011-12-29 | 2014-08-06 | 阳光电源股份有限公司 | Single-phase inverter |
| CN103199722A (en) * | 2012-01-06 | 2013-07-10 | 苏州欧姆尼克新能源科技有限公司 | Method used for offering reactive compensation to single-phase photovoltaic grid-connected inverter |
| CN103051169A (en) * | 2012-12-24 | 2013-04-17 | 江苏兆伏新能源有限公司 | Reactive power control method of inverter topology circuit |
| CN103051169B (en) * | 2012-12-24 | 2016-03-23 | 艾思玛新能源技术（上海）有限公司 | A kind of reactive power control method of inversion topological circuit |
| CN104836471A (en) * | 2014-02-12 | 2015-08-12 | 江苏物联网研究发展中心 | Inversion circuit and uninterrupted power supply circuit |
| CN103888009A (en) * | 2014-03-26 | 2014-06-25 | 深圳科士达科技股份有限公司 | Single-phase three-level photovoltaic inverter system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100310 Effective date of abandoning: 20090604 |