CN102082515B - High frequency isolated AC-AC mode three-level AC-AC converter based on flyback converter - Google Patents
High frequency isolated AC-AC mode three-level AC-AC converter based on flyback converter Download PDFInfo
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- CN102082515B CN102082515B CN 200910232474 CN200910232474A CN102082515B CN 102082515 B CN102082515 B CN 102082515B CN 200910232474 CN200910232474 CN 200910232474 CN 200910232474 A CN200910232474 A CN 200910232474A CN 102082515 B CN102082515 B CN 102082515B
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- 238000002955 isolation Methods 0.000 claims description 50
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- 230000002457 bidirectional effect Effects 0.000 abstract description 5
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Abstract
The present invention discloses a high frequency isolated AC-AC mode three-level AC-AC converter based on a flyback converter. The circuit typology of the converter consists of a high voltage AC power supply, an input filter, a high frequency isolated flyback three-level converting unit, a cycloconverter and an output AC load which are successively linked together, wherein the high frequency isolated flyback three-level converting unit, being composed of two bidirectional power switches, a bidirectional clamp power switch and a high frequency isolated flyback three-circuit transformer, can convert the input voltage to a plurality of output levels. The invention reduces voltage stress of the power switches and series of power conversion, and increases power factors of input side, conversion efficiency, and power density. The high frequency isolated AC-AC mode three-level AC-AC converter is applicable to high frequency electrically-isolated high voltage AC-AC electric energy converting occasions, and greatly widens the application field of the three-level AC-AC converter.
Description
Technical field
The invention belongs to the Technics of Power Electronic Conversion technology, particularly a kind of high frequency isolation type ac-ac type three-level AC-AC-AC converter based on anti exciting converter.
Background technology
Hand over-friendship (AC-AC) converter technique is the applied power semiconductor device, the AC energy of a certain frequency and amplitude is converted to a kind of Semiconductor Converting Technology of the AC energy of same or another frequency and amplitude, be widely used in national defence, industrial and mining enterprises, scientific research institutions, laboratory in colleges and universities and the daily life.
Up to now, the power electronics researcher mainly concentrates on the two level A-A transducers such as non-electrical isolation formula, low frequency and high frequency electrical isolation formula for the research of A-A transducer both at home and abroad; Research for multi-level converter, mainly concentrate on many level DC-DCs, DC-AC and AC-DC converter, research for many level A-A transducer is then considerably less, and only is confined to non-isolated, low frequency or the isolated AC-DC-AC type of intermediate frequency many level A-A transducer and the non-isolated ac-ac type three-level AC-AC-AC converter of Buck type.Although each tool advantage of the non-isolated ac-ac type three-level AC-AC-AC converter of AC-DC-AC type many level A-A transducer and Buck type, there are the defectives such as circuit topology is complicated, power conversion progression is many, the input side power factor is low, conversion efficiency is on the low side, power density is low in the former; And the latter exist topological form single, can only realize decompression transformation, without defectives such as electrical isolation.
The people such as M.Glinka have proposed many level of the isolated AC-DC-AC type of a kind of intermediate frequency A-A transducer (" Anew AC/AC multilevel converter family ", IEEE Transactions on IndustrialElectronics, 2005, Vol.52, No.3, pp.662～669.), its circuit structure is by modular multilevel A-A transducer (M
2LC), the formations such as intermediate frequency transformer, rectifier, inverter and filter, have that electrical isolation, output voltage are controlled, modularization, be applicable to the advantage such as high pressure ac-ac conversion, but have that topology complexity, power conversion progression many (low-frequency ac LFAC-direct current DC-midfrequent AC MFAC-direct current DC-low-frequency ac LFAC), input side power factor are low, conversion efficiency and power density is low, volume weight large, control the defectives such as complexity.
Summary of the invention
The object of the present invention is to provide a kind ofly have that topology is succinct, high frequency electrical isolation, two stage power conversion (low-frequency ac LFAC-high-frequency ac HFAC-low-frequency ac LFAC), bidirectional power flow, input side power factor are high, conversion efficiency and power density are high, the high frequency isolation type ac-ac type three-level AC-AC-AC converter based on anti exciting converter that is applicable to high pressure friendships-alternating current energy conversion occasion.
The technical solution that realizes the object of the invention is: the high frequency isolation type ac-ac type three-level AC-AC-AC converter that the present invention is based on anti exciting converter, it is characterized in that: this converter is by the input ac power that connects successively, input filter, high frequency isolation type instead swashs three level translation unit, frequency converter, output filter and output AC load consist of, this converter is transformed into stable or adjustable same frequency sinusoidal ac with unsettled High Level AC Voltage, and reduction power conversion progression, realize high frequency electrical isolation, be applicable to high pressure ac-ac conversion occasion, the reference of input high-voltage ac power is anodal to be connected with an end of input filter inductance, the other end of input filter inductance respectively with the first input filter capacitor, one end of the first two-way power switch pipe is connected, the other end of the first input filter capacitor respectively with the second input filter capacitor, one end of clamp two-way power switch is connected, the other end of the second input filter capacitor connects respectively the reference negative pole of input ac power and the other end of the second two-way power switch pipe, the reference minus earth of input ac power; Described input filter is made of input filter inductance, the first input filter capacitor, the second input filter capacitor; The other end of the first two-way power switch pipe links to each other with an end of former limit first winding of high-frequency isolation transformer, the other end of former limit the first winding links to each other with an end of former limit the second winding and the other end of clamp two-way power switch, the other end of former limit the second winding links to each other with the other end of the second two-way power switch, one end of this high-frequency isolation transformer secondary winding links to each other with an end of the 3rd two-way power switch, and the other end links to each other with an end of output filter capacitor, an end of output AC load; Described the first two-way power switch pipe, the second two-way power switch pipe, clamp two-way power switch, three winding high-frequency isolation transformer consist of high frequency isolation type and instead swash three level translation unit, obtain three level voltages to carrying out three level inverse-excitation type conversion through filtered sinusoidal voltage; Described the 3rd two-way power switch is realized the function of frequency converter, and the other end of the 3rd two-way power switch links to each other with the other end of output filter capacitor, output AC load; Described output filter capacitor is realized the function of output filter, and the output AC load-side obtains sinusoidal voltage.
The present invention compared with prior art, its remarkable advantage: the present invention realizes basis such as the key technology of novel electric power electric transformer and simple alternating current voltage regulator etc., high pressure friendships-alternating current energy conversion occasion in fields such as civilian, national defence and industry is with a wide range of applications.Owing to having the advantages such as topology is succinct, high frequency electrical isolation, two stage power conversion (low-frequency ac LFAC-high-frequency ac HFAC-low-frequency ac LFAC), bidirectional power flow, thereby with respect to the isolated AC-DC-AC type of intermediate frequency three-level AC-AC-AC converter, the present invention can improve conversion efficiency and power density, reduces volume and weight and improve the input side power factor; Owing to adopted three Level Technology, thereby with respect to two level A-A transducers, the present invention going for high pressure ac-ac conversion occasion, and can greatly reduce volume and weight, the raising output waveform quality of output filter.
Description of drawings
Accompanying drawing is the circuit topology figure that the present invention is based on the high frequency isolation type ac-ac type three-level AC-AC-AC converter of anti exciting converter.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
By reference to the accompanying drawings, the present invention is based on the high frequency isolation type ac-ac type three-level AC-AC-AC converter of anti exciting converter, by the input ac power u that connects successively
i, input filter, high frequency isolation type instead swash three level translation unit, frequency converter, output filter and output AC load and consist of, this converter is transformed into stable or adjustable same frequency sinusoidal ac with unsettled High Level AC Voltage, and reduce power conversion progression, realize high frequency electrical isolation, be applicable to high pressure ac-ac conversion occasion, i.e. input filter inductance L
i, the first input filter capacitor C
1, the second input filter capacitor C
2Consist of input filter, this filter is to input ac power u
iCarry out filtering; Describedly will be converted into many level of bipolarity output voltage u through the filtered input voltage of input filter
N1A high frequency isolation type output instead swashing three level translation unit link to each other with an end of frequency converter; Described frequency converter is by the 3rd two-way power switch S
3Consist of, will be converted into many level of unipolarity output voltage through the output voltage of the anti-sharp three level translation cell isolation of high frequency isolation type, transmission; The secondary winding N of one end of described frequency converter and three winding high-frequency isolation transformer
3An end connect the other end and output filter capacitor C
fAn end and output AC load Z
LAn end connect this output filter capacitor C
f, output AC load Z
LThe other end and secondary winding N
3The other end be connected described output filter capacitor C
fConsist of output filter, the high order harmonic component in the output voltage of the described frequency converter of this output filter filtering, thus obtain high-quality sinusoidal voltage u in the output AC load-side
o
The present invention is based on the high frequency isolation type ac-ac type three-level AC-AC-AC converter of anti exciting converter, instead swash three level translation unit, frequency converter, output filter and output AC load by the input ac power that connects successively, input filter, high frequency isolation type and consist of, input high-voltage ac power u
iReference anodal with the input filter inductance L
iAn end connect the input filter inductance L
iThe other end respectively with the first input filter capacitor C
1, the first two-way power switch pipe S
1An end be connected the first input filter capacitor C
1The other end respectively with the second input filter capacitor C
2, clamp two-way power switch S
CAn end be connected the second input filter capacitor C
2The other end meet respectively input ac power u
iReference negative pole and the second two-way power switch pipe S
2The other end, input ac power u
iThe reference minus earth; Described input filter is by the input filter inductance L
i, the first input filter capacitor C
1, the second input filter capacitor C
2Consist of, this filter is to input ac power u
iCarry out filtering; The first two-way power switch pipe S
1The other end and former limit the first winding N of high-frequency isolation transformer T
1An end link to each other former limit the first winding N
1The other end and former limit the second winding N
2An end and clamp two-way power switch S
CThe other end link to each other former limit the second winding N
2The other end and the second two-way power switch S
2The other end link to each other this three windings high-frequency isolation transformer secondary winding N
3An end and the 3rd two-way power switch S
3An end link to each other the other end and output filter capacitor C
fAn end, output AC load Z
LAn end link to each other; Described the first two-way power switch pipe S
1, the second two-way power switch pipe S
2, clamp two-way power switch S
C, three winding high-frequency isolation transformer T consist of high frequency isolation type and instead swash three level translation unit, obtain three level voltages to carrying out three level inverse-excitation type conversion through filtered sinusoidal voltage; Described the 3rd two-way power switch S
3Realize the function of frequency converter, will be converted into many level of unipolarity output voltage, the 3rd two-way power switch S through the output voltage of the anti-sharp three level translation cell isolation of high frequency isolation type, transmission
3The other end and output filter capacitor C
f, output AC load Z
LThe other end link to each other; Described output filter capacitor C
fRealize the function of output filter, the high order harmonic component in the output voltage of the described frequency converter of this output filter filtering, thus obtain high-quality sinusoidal voltage u in the output AC load-side
o
The present invention is based on the high frequency isolation type ac-ac type three-level AC-AC-AC converter of anti exciting converter, described the first two-way power switch S
1, the second two-way power switch S
2, the 3rd two-way power switch S
3, clamp two-way power switch S
CAll be to be consisted of by two single power switch pipe differential concatenations to bear forward, reverse voltage stress and the switch of current stress, have the two-way blocking-up function.
The first two-way power switch pipe S
1Comprise the first power switch tube S
1a, the second power switch tube S
1b, the first diode p
1, the second diode p
2The first power switch tube S
1aSource electrode connect the second power switch tube S
1bSource electrode, the first power switch tube S
1aSource electrode also meet the first diode p
1Anode, the first power switch tube S
1aDrain electrode meet the first diode p
1Negative electrode, the second power switch tube S
1bSource electrode meet the second diode p
2Anode, the second power switch tube S
1bDrain electrode meet the second diode p
2Negative electrode.This two-way power switch is realized turning on and off by control circuit respectively in the positive-negative half-cycle of sinusoidal voltage, sinusoidal voltage to input carries out modulation /demodulation, because be to be consisted of to bear forward, reverse voltage stress and the switch of current stress by two single power switch pipe differential concatenations, so have the two-way blocking-up function.
The second two-way power switch S
2Comprise the 3rd power switch tube S
2a, the 4th power switch tube S
2b, the 3rd diode p
3, the 4th diode p
4, the 3rd power switch tube S
2aSource electrode connect the 4th power switch tube S
2bSource electrode, the 3rd power switch tube S
2aSource electrode also meet the 3rd diode p
3Anode, the 3rd power switch tube S
2aDrain electrode meet the 3rd diode p
3Negative electrode, the 4th power switch tube S
2bSource electrode meet the 4th diode p
4Negative electrode, the 4th power switch tube S
2bDrain electrode meet the 4th diode p
4Anode; This two-way power switch is realized turning on and off by control circuit respectively in the positive-negative half-cycle of sinusoidal voltage, sinusoidal voltage to input carries out modulation /demodulation, because be to be consisted of to bear forward, reverse voltage stress and the switch of current stress by two single power switch pipe differential concatenations, so have the two-way blocking-up function.
The 3rd two-way power switch S
3Comprise the 5th power switch tube S
3a, the 6th power switch tube S
3b, the 5th diode p
5, the 6th diode p
6, the 5th power switch tube S
3aSource electrode connect the 6th power switch tube S
3bSource electrode, the 5th power switch tube S
3aSource electrode also meet the 5th diode p
5Anode, the 5th power switch tube S
3aDrain electrode meet the 5th diode p
5Negative electrode, the 6th power switch tube S
3bSource electrode meet the 6th diode p
6Negative electrode, the 6th power switch tube S
3bDrain electrode meet the 6th diode p
6Anode; This two-way power switch by control circuit realizes respectively that in the positive-negative half-cycle of sinusoidal voltage the sinusoidal voltage that turns on and off after instead swashing three level translation cells modulate demodulation through high frequency isolation type carries out all wave conversions, the equal energy of positive-negative half-cycle turn-on and turn-off at voltage, because be to be consisted of to bear forward, reverse voltage stress and the switch of current stress by two single power switch pipe differential concatenations, thereby also have the two-way blocking-up function.
Clamp two-way power switch S
CComprise the 7th power switch tube S
Ca, the 8th power switch tube S
Cb, the 7th diode p
7, the 8th diode p
8, the 7th power switch tube S
CaSource electrode connect the 8th power switch tube S
4bSource electrode, the 7th power switch tube S
4aSource electrode also meet the 7th diode p
7Anode, the 7th power switch tube S
CaDrain electrode meet the 7th diode p
7Negative electrode, the 8th power switch tube S
CbSource electrode meet the 8th diode p
8Negative electrode, the 8th power switch tube S
CbDrain electrode meet the 8th diode p
8Anode.This two-way power switch is realized turning on and off by control circuit respectively in the positive-negative half-cycle of sinusoidal voltage, thereby with the first output filter capacitor C
1With the second input filter capacitor C
2Between voltage clamping in midpoint, because be to be consisted of to bear forward, reverse voltage stress and the switch of current stress by two single power switch pipe differential concatenations, so have the two-way blocking-up function.
The basic functional principle of high frequency isolation type ac-ac type three-level AC-AC-AC converter that the present invention is based on anti exciting converter is as follows: this converter can adopt the control mode of pulse-width modulation (PWM) copped wave of active-clamp.As unsettled high input voltage AC power u
iTo exchanging output loading Z
LDuring transmitted power, input filter is at first to input ac power u
iHigh order harmonic component carry out filtering, voltage after the filtering instead swashs three level translation unit through high frequency isolation type it is modulated into bipolarity, many level (u
i, u
i/ 2,0 ,-u
i/ 2 ,-u
i) high-frequency pulse voltage u
N1, after the isolation of high-frequency isolation transformer, transmission, frequency converter is demodulated into unipolarity, many level
Low-frequency pulse voltage after output filter carries out output filtering, obtain again stable or adjustable same frequency sinusoidal voltage u
o, wherein the control circuit of converter can be according to output AC load Z
LCapacitive, perception, the character such as resistive adjust, thereby obtain stable or adjustable voltage at output.
With respect to many level of the isolated AC-DC-AC type of intermediate frequency A-A transducer, circuit structure of the present invention only has two stage power conversion (low-frequency ac LFAC-high-frequency ac HFAC-low-frequency ac LFAC) and has high frequency electrical isolation, thereby this converter can improve input side power factor, conversion efficiency, power density and reliability, and reduces volume, weight.Because circuit structure of the present invention adopts two-way power switch to replace single power switch, thereby can realize that voltage stress that bidirectional power flow and its each single power switch bear is half of two level A-A transducers, thereby can be widely used in high pressure ac-ac conversion occasion.In addition, with respect to two level A-A transducers, because the output voltage of the frequency converter in the circuit structure of the present invention is the voltage waveform of many level, has improved spectral characteristic, thereby can reduce the volume and weight of output filter and improve the output waveform quality.
Claims (6)
1. high frequency isolation type ac-ac type three-level AC-AC-AC converter based on anti exciting converter, it is characterized in that: this converter instead swashs three level translation unit, frequency converter, output filter and output AC load by the input ac power that connects successively, input filter, high frequency isolation type and consists of, and input filter is by input filter inductance [L
i], the first input filter capacitor [C
1], the second input filter capacitor [C
2] consist of the first two-way power switch [S
1], the second two-way power switch [S
2], clamp two-way power switch [S
C], three winding high-frequency isolation transformer [T] consist of high frequency isolation type and instead swash three level translation unit, obtain three level voltages, the 3rd two-way power switch [S to carrying out three level inverse-excitation type conversion through filtered sinusoidal voltage
3] realize the function of frequency converter, output filter capacitor [C
f] realize the function of output filter; Obtain sinusoidal voltage [u in the output AC load-side
o]; Input high-voltage ac power [u
i] reference anodal with input filter inductance [L
i] an end connect input filter inductance [L
i] the other end respectively with the first input filter capacitor [C
1], the first two-way power switch [S
1] an end be connected the first input filter capacitor [C
1] the other end respectively with the second input filter capacitor [C
2], clamp two-way power switch [S
C] an end be connected the second input filter capacitor [C
2] the other end meet respectively input ac power [u
i] reference negative pole and the second two-way power switch [S
2] an end, input ac power [u
i] the reference minus earth; The first two-way power switch [S
1] the other end and the former limit first winding [N of high-frequency isolation transformer [T]
1] an end link to each other former limit the first winding [N
1] the other end and former limit the second winding [n
2] an end and clamp two-way power switch [S
c] the other end link to each other former limit the second winding [N
2] the other end and the second two-way power switch [S
2] an end link to each other this high-frequency isolation transformer secondary winding [N
3] an end and the 3rd two-way power switch [S
3] an end link to each other the other end and output filter capacitor [C
f] an end, output AC load [Z
L] an end link to each other; The 3rd two-way power switch [S
3] the other end and output filter capacitor [C
f], output AC load [Z
L] the other end link to each other.
2. the high frequency isolation type ac-ac type three-level AC-AC-AC converter based on anti exciting converter according to claim 1 is characterized in that: described the first two-way power switch [S
1], the second two-way power switch [S
2], the 3rd two-way power switch [S
3], clamp two-way power switch [S
C] all be to be consisted of by two single power switch pipe differential concatenations to bear forward, reverse voltage stress and the switch of current stress, have the two-way blocking-up function.
3. the high frequency isolation type ac-ac type three-level AC-AC-AC converter based on anti exciting converter according to claim 2 is characterized in that: the first two-way power switch [S
1] comprise the first power switch pipe [S
1a], the second power switch pipe [S
1b], the first diode [p
1], the second diode [p
2]; The first power switch pipe [S
1a] source electrode meet the second power switch pipe [S
1b] source electrode, the first power switch pipe [S
1a] source electrode also meet the first diode [p
1] anode, the first power switch pipe [S
1b] drain electrode meet the first diode [p
1] negative electrode, the second power switch pipe [S
1b] source electrode meet the second diode [p
2] anode, the second power switch pipe [S
1b] drain electrode meet the second diode [p
2] negative electrode.
4. the high frequency isolation type ac-ac type three-level AC-AC-AC converter based on anti exciting converter according to claim 1 is characterized in that: the second two-way power switch [S
2] comprise the 3rd power switch pipe [S
1a], the 4th power switch pipe [S
2b], the 3rd diode [p
3], the 4th diode [p
4], the 3rd power switch pipe [S
2a] source electrode meet the 4th power switch pipe [S
2b] source electrode, the 3rd power switch pipe [S
2a] source electrode also meet the 3rd diode [p
3] anode, the 3rd power switch pipe [S
2a] drain electrode meet the 3rd diode [p
3] negative electrode, the 4th power switch pipe [S
2a] source electrode meet the 4th _ utmost point pipe [p
4] negative electrode, the 4th power switch pipe [S
2b] drain electrode meet the 4th diode [p
4] anode.
5. the high frequency isolation type ac-ac type three-level AC-AC-AC converter based on anti exciting converter according to claim 1 is characterized in that: the 3rd two-way power switch [S
3] comprise that the 5th power rises pass pipe [S
3a], the 6th power rise to close pipe [S
3b], the 5th diode [p
5], the 6th diode [p
6], the 5th power switch pipe [S
3a] source electrode meet the 6th power switch pipe [S
3b] source electrode, the 5th power switch pipe [S
3a] source electrode also meet the 5th diode [p
6] anode, the 5th power switch pipe [S
3a] drain electrode meet the 5th diode [p
5] negative electrode, the 6th power switch pipe [S
3b] source electrode meet the 6th diode [[p
6] negative electrode, the 6th power switch pipe [S
3b] drain electrode meet the 6th diode [p
6] anode.
6. the high frequency isolation type ac-ac type three-level AC-AC-AC converter based on anti exciting converter according to claim 1 is characterized in that: clamp two-way power switch [S
C] comprise the 7th power switch pipe [S
Ca], the 8th power switch pipe [S
Cb], the 7th diode [p
7], the 8th diode [p
8], the 7th power switch pipe [S
Ca] source electrode meet the 8th power switch pipe [S
4b] source electrode, the 7th power switch pipe [S
4a] source electrode also meet the 7th diode [p
7] anode, the 7th power switch pipe [S
Ca] drain electrode meet the 7th diode [p
7] negative electrode, the 8th power switch pipe [S
Cb] source electrode meet the 8th diode [p
6] negative electrode, the 8th power switch pipe [S
Cb] drain electrode meet the 8th diode [p
8] anode.
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| CN 200910232474 CN102082515B (en) | 2009-11-27 | 2009-11-27 | High frequency isolated AC-AC mode three-level AC-AC converter based on flyback converter |
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|---|---|---|---|
| CN 200910232474 CN102082515B (en) | 2009-11-27 | 2009-11-27 | High frequency isolated AC-AC mode three-level AC-AC converter based on flyback converter |
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| CN109149986B (en) * | 2018-10-11 | 2024-03-08 | 昆明理工大学 | Three-level-like hybrid modular multilevel converter and control method thereof |
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| CN101039078A (en) * | 2007-01-30 | 2007-09-19 | 南京理工大学 | Non-isolation type AC-AC tri-level converter |
| CN101150286A (en) * | 2007-04-04 | 2008-03-26 | 南京理工大学 | AC-AC three level AC-AC converter based on positive converter |
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|---|---|---|---|---|
| JPH0213265A (en) * | 1988-06-27 | 1990-01-17 | Matsushita Electric Works Ltd | High frequency power source equipment |
| GB2439035B (en) * | 2005-04-15 | 2008-10-22 | Yaskawa Denki Seisakusho Kk | Matrix converter apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101039078A (en) * | 2007-01-30 | 2007-09-19 | 南京理工大学 | Non-isolation type AC-AC tri-level converter |
| CN101150286A (en) * | 2007-04-04 | 2008-03-26 | 南京理工大学 | AC-AC three level AC-AC converter based on positive converter |
Non-Patent Citations (4)
| Title |
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| JP平2-13265A 1990.01.17 |
| 两种高频交流环节AC/AC变换器比较研究;李磊等;《中国电机工程学报》;20061031;第26卷(第20期);全文 * |
| 李磊.高频交流环节AC/AC变换器研究.《中国博士学位论文全文数据库(电子期刊)》.2005, * |
| 李磊等.两种高频交流环节AC/AC变换器比较研究.《中国电机工程学报》.2006,第26卷(第20期), |
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| CN102082515A (en) | 2011-06-01 |
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