CN105680715A - Three-phase single-stage inverter - Google Patents
Three-phase single-stage inverter Download PDFInfo
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- CN105680715A CN105680715A CN201610181991.7A CN201610181991A CN105680715A CN 105680715 A CN105680715 A CN 105680715A CN 201610181991 A CN201610181991 A CN 201610181991A CN 105680715 A CN105680715 A CN 105680715A
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- switching tube
- diode
- inductance
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
Abstract
The invention discloses a three-phase single-stage inverter, which comprises a first circuit, a second circuit and a third circuit. Advantages of an isolation transformer in the second circuit are made full use of to solve the problems of a large step-up ratio and electrical isolation. The inverter is a single-input power supply, which overcomes the defect that a dual-input power supply is needed by the traditional output parallel combined single-stage inverter. According to the control strategy, primary and secondary-side dual-modulation is adopted, secondary-side modulation and inversion output are realized, the primary side controls the input current to be a constant value, and no low-frequency pulse exists. In addition, the three-phase single-stage inverter keeps the characteristics of the output parallel single-stage inverter, the number of devices through which the current flows in the case of work is few, and the efficiency is enhanced. The circuit topology is stable and reliable, and the output power is large.
Description
One, technical field
The present invention relates to a kind of three-phase single-level inverter, belong to the inverter in electrical energy changer.
Two, background technology
As time goes on, the non-renewable energy resources such as coal, oil always have one day be finished. Solar energy becomes the energy resource supply of human society as a kind of regenerative resource by progressively replacing fossil energy. There is output pulses problem in traditional single-phase single-grade inverter, therefore, the DC side of traditional single phase inverter needs a capacitance in parallel and all very big electrochemical capacitor of volume. Considerably increase the volume of entirety, improve Financial cost. In three-phase inversion system, output sum is close to steady state value, but directly to form three-phase system structure complex for three single-phase single-grade inverters, and control method is loaded down with trivial details.
Three, summary of the invention
1, goal of the invention: it is an object of the invention to the advantage making full use of isolation transformation, it is proposed to common transformer primary circuit builds three-phase single-level inverter.
2, technical scheme: in order to solve above-mentioned technical problem, the three-phase single-level inverter of the present invention includes circuit 1, circuit 2 and circuit 3. Circuit 1 includes the first switching tube S5, second switch pipe S6, the first diode D3, the second diode D4; Circuit 2 includes isolating transformer T; Circuit 3 includes the 3rd switching tube S1A, the 4th switching tube S2A, the 5th switching tube S3A, the 6th switching tube S4A, the 7th switching tube S1B, the 8th switching tube S2B, the 9th switching tube S3B, the tenth switching tube S4B, the 11st switching tube S1C, twelvemo close pipe S2C, the 13rd switching tube S3C, the 14th switching tube S4C, the first inductance L1, the second inductance L2, the 3rd inductance L3, the 3rd diode D1A, the 4th diode D2A, the 5th diode D3A, the 6th diode D4A, the 7th diode D1B, the 8th diode D2B, the 9th diode D3B, the tenth diode D4B, the 11st diode D1C, the 12nd diode D2C, the 13rd diode D3C, the 14th diode D4C. The three-phase single-level inverter of the present invention is characterised by, the first switching tube S5One end, the first diode D3Negative electrode and external direct current power supply UiPositive pole connect; Second switch pipe S6One end, the second diode D4Anode and the external direct current power supply U that is connectediNegative pole connect; 3rd switching tube S1A, the 3rd diode D1ANegative electrode and the first inductance L1One end connect; First inductance L1One end, the 4th diode D2AAnode and the 4th switching tube S2AOne end connect; 5th switching tube S3A, the 5th diode D3ANegative electrode and the first inductance L1One end connect;First inductance L1One end, the 6th diode D4AAnode and the 6th switching tube S4AOne end connect; 6th switching tube S4AThe other end, the 4th switching tube S2AThe other end be connected with one end of external load; First inductance L1The other end be connected with the other end of external load. Ibid, the 7th switching tube S1B, the 7th diode D1BNegative electrode and the second inductance L2One end connect; Second inductance L2One end, the 8th diode D2BAnode and the 8th switching tube S2BOne end connect; 9th switching tube S3B, the 9th diode D3BNegative electrode and the second inductance L2One end connect; Second inductance L2One end, the tenth diode D4BAnode and the tenth switching tube S4BOne end connect; Tenth switching tube S4BThe other end, the 8th switching tube S2BThe other end be connected with one end of external load; Second inductance L2The other end be connected with the other end of external load. Ibid, the 11st switching tube S1C, the 11st diode D1CNegative electrode and the 3rd inductance L3One end connect; 3rd inductance L3One end, the 12nd diode D2CAnode and twelvemo close pipe S2COne end connect; 13rd switching tube S3C, the 13rd diode D3CNegative electrode and the 3rd inductance L3One end connect; 3rd inductance L3One end, the 14th diode D4CAnode and the 14th switching tube S4COne end connect; 14th switching tube S4CThe other end, twelvemo close pipe S2CThe other end be connected with one end of external load; 3rd inductance L3The other end be connected with the other end of external load.
3, beneficial effect: the three-phase single-level inverter of the present invention, has the advantage that (1) solves big step-up ratio and electrical isolation problem with isolating transformer; (2) single input power supply, overcomes the shortcoming that the tradition combined single-stage inverter of output-parallel needs dual input power supply; (3) primary-side-control input current is steady state value, without low-frequency pulse; (4) during work electric current to flow through device few, improve efficiency. (5) topological structure is stable, reliable, has bigger output
Four, accompanying drawing explanation
Fig. 1 is the electrical block diagram of the three-phase single-level inverter of the present invention, label title: 1. circuit 1; 2. circuit 2; Circuit 3.
The circuit that Fig. 2 is the three-phase single-level inverter of the present invention respectively switchs mode schematic diagram.
Primary symbols title in figure: S5、S6、S1A、S2A、S3A、S4A、S1B、S2B、S3B、S4B、S1C、S2C、S3C、S4C, the first～the 14th switching tube; D3、D4、D1A、D2A、D3A、D4A、D1B、D2B、D3B、D4B、D1C、D2C、D3C、D4CFirst～the 14th diode; L1、L2、L3First, second, third inductance; UiExternal direct current power supply; D1～D2The first～the second diode; uA、uB、uCExternal load; T isolating transformer.
Five, detailed description of the invention
As it is shown in figure 1, this example is three-phase single-level inverter, it is characterised in that: the first switching tube S5One end, the first diode D3Negative electrode and external direct current power supply UiPositive pole connect; Second switch pipe S6One end, the second diode D4Anode and the external direct current power supply U that is connectediNegative pole connect; 3rd switching tube S1A, the 3rd diode D1ANegative electrode and the first inductance L1One end connect; First inductance L1One end, the 4th diode D2AAnode and the 4th switching tube S2AOne end connect; 5th switching tube S3A, the 5th diode D3ANegative electrode and the first inductance L1One end connect; First inductance L1One end, the 6th diode D4AAnode and the 6th switching tube S4AOne end connect; 6th switching tube S4AThe other end, the 4th switching tube S2AThe other end be connected with one end of external load; First inductance L1The other end be connected with the other end of external load.Ibid, the 7th switching tube S1B, the 7th diode D1BNegative electrode and the second inductance L2One end connect; Second inductance L2One end, the 8th diode D2BAnode and the 8th switching tube S2BOne end connect; 9th switching tube S3B, the 9th diode D3BNegative electrode and the second inductance L2One end connect; Second inductance L2One end, the tenth diode D4BAnode and the tenth switching tube S4BOne end connect; Tenth switching tube S4BThe other end, the 8th switching tube S2BThe other end be connected with one end of external load; Second inductance L2The other end be connected with the other end of external load. Ibid, the 11st switching tube S1C, the 11st diode D1CNegative electrode and the 3rd inductance L3One end connect; 3rd inductance L3One end, the 12nd diode D2CAnode and twelvemo close pipe S2COne end connect; 13rd switching tube S3C, the 13rd diode D3CNegative electrode and the 3rd inductance L3One end connect; 3rd inductance L3One end, the 14th diode D4CAnode and the 14th switching tube S4COne end connect; 14th switching tube S4CThe other end, twelvemo close pipe S2CThe other end be connected with one end of external load; 3rd inductance L3The other end be connected with the other end of external load.
Below with accompanying drawing 1 for main circuit structure, describe specific works principle and the operation mode of the three-phase single-level inverter of the present invention in conjunction with accompanying drawing 2. Adopting former limit secondary double modulation strategy, secondary modulation inversion output, primary-side-control input current is steady state value, without low-frequency pulse. Secondary the 4th switching tube S2A, the 6th switching tube S4A, the 8th switching tube S2B, the tenth switching tube S4B, twelvemo close pipe S2C, the 14th switching tube S4CSwitching for power frequency, any time, high frequency modulated switching tube quantity is 3, i.e. each of three-phase secondary. In a switch periods, there are four kinds of operation modes, are respectively as follows:
Operation mode I: as shown in Fig. 2 (a), at the positive half cycle of output voltage, the first switching tube S5, second switch pipe S6Work. Now, the 3rd switching tube S1A, the 7th switching tube S1B, the 11st switching tube S1CWork, the 3rd diode D1A, the 7th diode D1B, the tenth diode D1CAfterflow. 4th diode D2A, octode D2B, the 12nd diode D2CCut-off. First inductance L1, the second inductance L2, the 3rd inductance L3Electric current linear rise, the first inductance L1, the second inductance L2, the 3rd inductance L3It is in energy storage increase the stage and provide energy to load.
Operation mode II: as shown in Fig. 2 (b), the first switching tube S5, second switch pipe S6Work. Now, the 3rd switching tube S1A, the 7th switching tube S1B, the 11st switching tube S1CTurn off; 4th switching tube S2A, the 8th switching tube S2B, twelvemo close pipe S2CWork; 3rd diode D1A, heptode D1B, the 11st diode D1CCut-off. Due to the first inductance L1, the second inductance L2, the 3rd inductance L3Electric current can not suddenly change, the first inductance L1, the second inductance L2, the 3rd inductance L3Polarity of voltage is reverse, will by the 4th diode D2A, the 8th diode D2B, the 12nd diode D2CEnergy is provided to load.
Operation mode III: as shown in Fig. 2 (c), at the negative half period of output voltage, the first switching tube S5, second switch pipe S6Work. Now, the 5th switching tube S3A, the 9th switching tube S3B, the 13rd switching tube S3CWork, the 5th diode D3A, the 9th diode D3B, the tenth audion D3CAfterflow. First inductance L1, the second inductance L2, the 3rd inductance L3Electric current linear rise, the first inductance L1, the second inductance L2, the 3rd inductance L3It is in energy storage and increases the stage.6th diode D4A, the tenth pole pipe D4B, the 14th diode D4CCut-off. First inductance L1, the second inductance L2, the 3rd inductance L3Electric current linear rise, the first inductance L1, the second inductance L2, the 3rd inductance L3It is in energy storage increase the stage and provide energy to load.
Operation mode IV: as shown in Fig. 2 (d), the first switching tube S5, second switch pipe S6Work. Now, the 5th switching tube S3A, the 9th switching tube S3B, the 13rd switching tube S3CTurn off; 6th switching tube S4A, the tenth switching tube S4B, the 14th switching tube S4CWork; 5th diode D3A, enneode D3B, the 13rd diode D3CCut-off. Due to the first inductance L1, the second inductance L2, the 3rd inductance L3Electric current can not suddenly change, the first inductance L1, the second inductance L2, the 3rd inductance L3Polarity of voltage is reverse, will by the 6th diode D4A, the tenth diode D4B, the 14th diode D4CEnergy is provided to load.
As seen from the above description, the three-phase single-level inverter of the present invention, this inverter has the advantage that
(1) big step-up ratio and electrical isolation problem are solved with isolating transformer;
(2) single input power supply, overcomes the shortcoming that the tradition combined single-stage inverter of output-parallel needs dual input power supply;
(3) primary-side-control input current is steady state value, without low-frequency pulse;
(4) during work electric current to flow through device few, improve efficiency;
(5) topological structure is stable, reliable, has bigger output.
Claims (1)
1. a three-phase single-level inverter, including circuit 1 circuit 2 and circuit 3, circuit 1 includes the first switching tube S5, second switch pipe S6, the first diode D3, the second diode D4; Circuit 2 includes isolating transformer T; Circuit 3 includes the 3rd switching tube S1A, the 4th switching tube S2A, the 5th switching tube S3A, the 6th switching tube S4A, the 7th switching tube S1B, the 8th switching tube S2B, the 9th switching tube S3B, the tenth switching tube S4B, the 11st switching tube S1C, twelvemo close pipe S2C, the 13rd switching tube S3C, the 14th switching tube S4C, the first inductance L1, the second inductance L2, the 3rd inductance L3, the 3rd diode D1A, the 4th diode D2A, the 5th diode D3A, the 6th diode D4A, the 7th diode D1B, the 8th diode D2B, the 9th diode D3B, the tenth diode D4B, the 11st diode D1C, the 12nd diode D2C, the 13rd diode D3C, the 14th diode D4C. The three-phase single-level inverter of the present invention is characterised by, the first switching tube S5One end, the first diode D3Negative electrode and external direct current power supply UiPositive pole connect; Second switch pipe S6One end, the second diode D4Anode and the external direct current power supply U that is connectediNegative pole connect; 3rd switching tube S1A, the 3rd diode D1ANegative electrode and the first inductance L1One end connect; First inductance L1One end, the 4th diode D2AAnode and the 4th switching tube S2AOne end connect; 5th switching tube S3A, the 5th diode D3ANegative electrode and the first inductance L1One end connect; First inductance L1One end, the 6th diode D4AAnode and the 6th switching tube S4AOne end connect; 6th switching tube S4AThe other end, the 4th switching tube S2AThe other end be connected with one end of external load; First inductance L1The other end be connected with the other end of external load. Ibid, the 7th switching tube S1B, the 7th diode D1BNegative electrode and the second inductance L2One end connect; Second inductance L2One end, the 8th diode D2BAnode and the 8th switching tube S2BOne end connect; 9th switching tube S3B, the 9th diode D3BNegative electrode and the second inductance L2One end connect;Second inductance L2One end, the tenth diode D4BAnode and the tenth switching tube S4BOne end connect; Tenth switching tube S4BThe other end, the 8th switching tube 82BThe other end be connected with one end of external load; Second inductance L2The other end be connected with the other end of external load. Ibid, the 11st switching tube S1C, the 11st diode D1CNegative electrode and the 3rd inductance L3One end connect; 3rd inductance L3One end, the 12nd diode D2CAnode and twelvemo close pipe S2COne end connect; 13rd switching tube S3C, the 13rd diode D3CNegative electrode and the 3rd inductance L3One end connect; 3rd inductance L3One end, the 14th diode D4CAnode and the 14th switching tube S4COne end connect; 14th switching tube S4CThe other end, twelvemo close pipe S2CThe other end be connected with one end of external load; 3rd inductance L3The other end be connected with the other end of external load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610181991.7A CN105680715B (en) | 2016-03-24 | 2016-03-24 | Three-phase single-level inverter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610181991.7A CN105680715B (en) | 2016-03-24 | 2016-03-24 | Three-phase single-level inverter |
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| Publication Number | Publication Date |
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| CN105680715A true CN105680715A (en) | 2016-06-15 |
| CN105680715B CN105680715B (en) | 2018-06-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160546A (en) * | 2016-09-29 | 2016-11-23 | 苏州弘鹏新能源有限公司 | Multiple coil normal shock output-parallel single-stage inverter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101018022A (en) * | 2006-12-29 | 2007-08-15 | 广东志成冠军集团有限公司 | Highly efficient energy-saving reversion circuit |
| CN101635530A (en) * | 2009-08-28 | 2010-01-27 | 南京航空航天大学 | Single-stage forward type high-frequency linked inverter |
| CN103259433A (en) * | 2013-05-20 | 2013-08-21 | 南京理工大学 | High-frequency isolation type tri-level inverter based on forward converter |
| CN103780115A (en) * | 2014-01-24 | 2014-05-07 | 南京理工大学 | High-frequency isolated-type three-level inverter based on flyback converter |
-
2016
- 2016-03-24 CN CN201610181991.7A patent/CN105680715B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101018022A (en) * | 2006-12-29 | 2007-08-15 | 广东志成冠军集团有限公司 | Highly efficient energy-saving reversion circuit |
| CN101635530A (en) * | 2009-08-28 | 2010-01-27 | 南京航空航天大学 | Single-stage forward type high-frequency linked inverter |
| CN103259433A (en) * | 2013-05-20 | 2013-08-21 | 南京理工大学 | High-frequency isolation type tri-level inverter based on forward converter |
| CN103780115A (en) * | 2014-01-24 | 2014-05-07 | 南京理工大学 | High-frequency isolated-type three-level inverter based on flyback converter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160546A (en) * | 2016-09-29 | 2016-11-23 | 苏州弘鹏新能源有限公司 | Multiple coil normal shock output-parallel single-stage inverter |
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