CN103986360B - High-frequency isolation type boost type three-level inverter - Google Patents
High-frequency isolation type boost type three-level inverter Download PDFInfo
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- CN103986360B CN103986360B CN201410223599.5A CN201410223599A CN103986360B CN 103986360 B CN103986360 B CN 103986360B CN 201410223599 A CN201410223599 A CN 201410223599A CN 103986360 B CN103986360 B CN 103986360B
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Abstract
The present invention provides a kind of high-frequency isolation type boost type three-level inverter circuit, it is made up of Boost translation circuit and flyback energy feedback circuit, the input dc power source unit that Boost translation circuit is sequentially connected with, input filter, high-frequency inverter, high frequency transformer, frequency converter, output filter capacitor and output AC load are constituted, due to Boost type changer can only boost can not blood pressure lowering, decline so output voltage cannot be obtained and meet the sine wave output shape required, in order to ensure sinusoidal output waveform quality this period, solve output filter capacitor and the whereabouts problem of load quadergy, high frequency electrical isolation inverse excitation type converter energy back circuit is added between output loading and input power.The inverter of the present invention has that power conversion progression is few, device for power switching is few, ripple is little, power switch pipe voltage stress is low in input, bidirectional power flow, high frequency electrical isolation, characteristic that output filter front voltage spectral characteristic is good.
Description
Technical field
The invention belongs to Technics of Power Electronic Conversion technical field, particularly a kind of novel high-frequency isolated form boost type three-level inverter.
Background technology
Power electronics research worker is for the research of straight-AC-AC converter the most both at home and abroad, is concentrated mainly on non-electrical isolated, low
Frequency and two level such as high frequency electrical isolation formula straight-AC-AC converter；For the research of multi-level converter, it is concentrated mainly on many level
Directly-straight, hand over-hand over and straight-friendship-DC converter, for many level straight-research of AC-AC converter is the most considerably less, and be limited only to
Non-isolated, low frequency or intermediate frequency isolated directly-the many level of friendship type are straight-AC-AC converter and to high frequency isolation type many level two stage power
The inverter research of conversion is the most fewer.
Multi-electrical level inverter mainly has three class topological structure: (1) Diode-clamped inverter, (2) capacitor-clamped type inverter,
(3) there is the cascaded inverter of independent DC power supply direct current.Diode-clamped, capacitor-clamped type multi-electrical level inverter have
It is suitable for the advantage with high input voltage high-power inverter occasion: the cascade multilevel inverter with independent DC power supply has
It is applicable to low input, the advantage of high output voltage high power contravariant occasion.But diode-clamped, the many level of capacitor-clamped type
It is single, without defects such as electrical isolation to there is topological form in the flat inversion transformation technique of multiple spot: have the cascading multiple electrical level of independent DC power supply
There is the defects such as circuit topology complexity input side power factor is low, conversion efficiency is on the low side, power density is low in inversion transformation technique.
High frequency link inversion transformation technique high frequency transformer instead of the Industrial Frequency Transformer in low frequency link inversion transformation technique, overcomes low frequency
The shortcoming of inversion transformation technique, significantly improves the characteristic of inverter, will replace low frequency link inverter, be used widely.High
Frequently chain transducer is a kind of flexible and changeable topological structure, and its common ground is that the form of circuit structure is compact, and power density is high, phase
Answer speed fast.It addition, system can be operated in more than 20kH, without audio noise, filtering is relatively easy, and power is up to kW
Above.Therefore, no matter in constant voltage constant frequency field, or having the biggest practical value in voltage regulation and frequency modulation field, it is to continue future
One important topic of continuous research and development.
Up to now, the research of buck, buck-boost type high frequency link DC-AC changer is had been achieved for significantly by people
Achievement, but buck, buck-boost type high frequency link DC-AC changer exists that input current ripple is big, load short circuits time can
By defects such as property low (buck type), output capacities little (buck-boost).Research to Boost type changer, mainly collects
In in Boost type DC-DC, AC-AC, AC-DC converter, the isolated and electrical isolation formula including non-electrical, to Boost type
The research of three-level converter is concentrated mainly on without isolating transformer type, and Boost type three level for band isolating transformer becomes
The research of the Boost type three-level inverter of parallel operation particularly band isolating transformer is the most little.In order to constitute system, complete height
Frequently link inversion transformation technique is theoretical, it is necessary to seeks and furthers investigate novel high-frequency isolated form boost type three-level inverter.
Summary of the invention
Present invention aim at providing a kind of high-frequency isolation type boost type three-level inverter, have that power conversion progression is few, power
Switching device is few, ripple is little, power switch pipe voltage stress is low in input, bidirectional power flow, high frequency electrical isolation, output filtering
The characteristic that device front voltage spectral characteristic is good.
For reaching above-mentioned purpose, the technical solution adopted in the present invention is as follows:
A kind of high frequency isolation type boosting three-level inverter, by the input dc power source unit being sequentially connected with, input filter, height
Frequently inverter, high frequency transformer, frequency converter, output derided capacitors, output AC load constitute, high frequency electrical isolation anti-
Excitation type converter is constituted, and wherein, input dc power source unit includes input DC power, input DC power and input filter
One end connect, the other end of input filter is connected with one end of high-frequency inverter, the other end of high-frequency inverter and high frequency change
The armature winding of depressor connects, and the secondary windings of high frequency transformer is connected with the input of frequency converter, frequency converter defeated
Going out end to be connected with the input of output derided capacitors, the outfan of output derided capacitors is connected with output AC load, output AC
Load couples high frequency electrical isolation inverse excitation type converter with between input dc power source unit.
In further embodiment, described input filter includes input filter inductance and input filter capacitor, and wherein, input is straight
Stream power supply reference positive pole be connected with one end of input filter inductance, the other end of input filter inductance respectively with input filter capacitor
Positive pole and boost inductance one end connect, the negative pole of input filter capacitor is connected with the reference negative pole of input DC power；
Described high frequency transformer includes the first primary side winding, the second primary side winding and the 3rd vice-side winding, the 4th vice-side winding；
Described high-frequency inverter includes boost inductance, the first power switch pipe and the first diode, the second power switch pipe and
Two diodes, the 3rd power switch pipe and the 3rd diode, the 4th power switch pipe and the 4th diode, wherein:
The drain electrode of the first power switch pipe is connected with the other end of boost inductance and the drain electrode of the second power switch pipe respectively, and first
The source electrode of power switch pipe connects in the drain electrode of the 3rd power switch pipe, the source electrode of the second power switch pipe and the first primary side winding
Non-same polarity connects, with the first power switch pipe after the Same Name of Ends of the first primary side winding and the Same Name of Ends connection of the second primary side winding
The drain electrode of source electrode and the 3rd power switch pipe connects, after the source electrode of the 3rd power switch pipe and the source electrode of the 4th power switch pipe connect
Being connected with the negative pole of input filter, then be connected with the negative pole of input DC power, the drain electrode of the 4th power switch pipe is former with second
The non-same polarity of limit winding connects, the inverse parallel respectively of the first diode, the second diode, the 3rd diode, the 4th diode in
First power switch pipe, the second power switch pipe, the 3rd power switch pipe, the two ends of the 4th power switch pipe, the i.e. the 1st pole
The negative electrode of pipe and the drain electrode of the first power switch pipe connect, and the anode of the first diode and the source electrode of the first power switch pipe connect,
The negative electrode of the second diode and the drain electrode of the second power switch pipe connect, the anode of the second diode and the source of the second power switch pipe
Pole connects, and the negative electrode of the 3rd diode and the drain electrode of the 3rd power switch pipe connect, and anode and the 3rd power of the 3rd diode are opened
The source electrode closing pipe connects, the drain electrode connection of the negative electrode of the 4th diode and the 4th power switch pipe, the anode of the 4th diode and the
The source electrode of four power switch pipes connects；
The source electrode of the non-same polarity of the first primary side winding of described high frequency transformer and the second power switch pipe connects, the first former limit around
With drain electrode, the source of the first power switch pipe of the 3rd power switch pipe after the Same Name of Ends connection of Same Name of Ends and second primary side winding of group
Pole connects, and the non-same polarity of the second primary side winding and the drain electrode of the 4th power switch pipe connect；3rd secondary of high frequency transformer around
The drain electrode of Same Name of Ends and the 5th power switch pipe of group connects, the non-same polarity of the 3rd vice-side winding and the 4th vice-side winding non-together
Name end connects, and the Same Name of Ends of the 4th vice-side winding and the drain electrode of the 7th power switch pipe connect；
Described frequency converter includes the first four-quadrant power switch pipe, the second four-quadrant power switch pipe, the of high frequency transformer
The Same Name of Ends of three vice-side winding is connected with the drain electrode of the 5th power switch pipe of described frequency converter, the negative electrode of the 5th diode even
It is connected together, the source electrode of the 5th power switch pipe, the anode of the 5th diode, the source electrode of the 6th power switch pipe, the six or two pole
The anode of pipe links together, the Same Name of Ends of the 4th vice-side winding of high frequency transformer and the drain electrode of the 7th power tube and the seven or two pole
The negative electrode of pipe connects, the source electrode of the 7th power switch pipe, the anode of the 7th diode, the source electrode of the 8th power switch pipe, the 8th
The anode of diode links together, and the drain electrode of the 6th power switch pipe is connected with the positive pole of the first derided capacitors, the first dividing potential drop electricity
Non-of the same name with the non-same polarity of the 3rd vice-side winding and the 4th vice-side winding after the positive pole connection of the negative pole and the second derided capacitors that hold
End connects, and the drain electrode of the 8th power switch pipe is connected with the negative pole of the second derided capacitors, and the 5th power switch pipe, the 6th power are opened
Guan Guan, the 5th diode, the 6th diode constitute the first four-quadrant power switch pipe, and the 7th power switch pipe, the 8th power are opened
Guan Guan, the 7th diode, the 8th diode constitute the second four-quadrant power switch pipe, the first four-quadrant power switch pipe, second
Two four-quadrant power switch pipes of four-quadrant power switch pipe constitute described frequency converter；
Described output derided capacitors includes the first derided capacitors and the second derided capacitors, wherein, the positive pole of the first derided capacitors and week
The drain electrode of the 6th power switch pipe, the negative electrode of the 6th diode in wave converter connect, the negative pole of the first derided capacitors and second
The non-same polarity of the positive pole of derided capacitors and the 3rd vice-side winding connects, the negative pole of the second derided capacitors and the 8th power switch pipe
The negative electrode of drain electrode and the 8th diode connects；
The load of described output AC includes AC load, the two ends of AC load respectively with the positive pole of the first derided capacitors and second point
The negative pole of voltage capacitance connects；
Described high frequency electrical isolation inverse excitation type converter is energy feedback circuit, and it includes the 9th power switch pipe, the 9th diode,
Tenth power switch pipe, the tenth diode, the 11st power switch pipe, the 11st diode, the 12nd diode, inverse-excitation type
Transformator, the 13rd power switch pipe, the 13rd diode, the 14th power switch pipe, the 14th diode, wherein: the
The source electrode of nine power switch pipes and the anode of the 9th diode connect, the drain electrode of the 9th power switch pipe and the negative electrode of the 9th diode
Connect with the negative electrode of the 11st diode, the anode of the 11st diode and the non-same polarity of flyback transformer the 5th primary side winding
Connecting, the source electrode of the tenth power switch pipe and the anode of the tenth diode connect, the drain electrode of the tenth power switch pipe and the 12nd pole
The negative electrode of pipe and the negative electrode of the 12nd diode connect, the anode of the 12nd diode and flyback transformer the 6th primary side winding
Same Name of Ends connects, with the positive pole of input DC power after the source electrode of the 9th power switch pipe and the source electrode connection of the tenth power switch pipe
Connect, input DC power after the Same Name of Ends of flyback transformer the 5th primary side winding and the non-same polarity connection of the 6th primary side winding
Negative pole connect, the Same Name of Ends of the 7th vice-side winding of flyback transformer connects with the positive pole of the first derided capacitors, inverse-excitation type change
The negative electrode of the non-same polarity of depressor and the drain electrode of the 13rd power switch pipe, the 13rd diode connects, the 13rd power switch pipe
Source electrode, the anode of the 13rd diode, the source electrode of the 14th power switch pipe, the anode of the 14th diode link together,
The drain electrode of the 14th power switch pipe links together with the negative pole of the second derided capacitors after being connected with the negative electrode of the 14th diode.
From the above technical solution of the present invention shows that, the beneficial effects of the present invention is:
(1) novel high-frequency isolated form boost type three-level inverter is compared with traditional B oost type inverter, inputs for three level weeks
The maximum voltage stress that wave converter switching tube bears is 1/2nd output voltages, and the switching tube of output frequency converter bears
Maximum stress is output voltage, reduces the voltage stress of power switch.
(2) in input DC power with AC load, high-frequency isolation transformer is inserted, it is achieved that input side is electric with load-side
Isolation, the use of high-frequency isolation transformer achieves the miniaturization of changer, lightweight, improves the efficiency of changer.
(3) compared with traditional multi-electrical level inverter, this inverter circuit topology is succinct, decrease power conversion progression and can
Realize the two-way flow of power.
(4) between output loading and input power, high frequency electrical isolation inverse excitation type converter energy feedback circuit is set up, it is ensured that just
String ripple output waveform quality, solves output filter capacitor and the whereabouts problem of load quadergy.
Accompanying drawing explanation
Fig. 1 is the circuit topology figure of an embodiment of the present invention high frequency isolation type boosting three-level inverter.
Detailed description of the invention
In order to know more about the technology contents of the present invention, especially exemplified by specific embodiment and coordinate institute's accompanying drawings to be described as follows.
As it is shown in figure 1, according to the preferred embodiment of the present invention, high-frequency isolation type boost type three-level inverter, by being sequentially connected with
Input dc power source unit 1, input filter 2, high-frequency inverter 3, high frequency transformer 4, frequency converter 5, output
Derided capacitors 6 and output AC load 7, high frequency electrical isolation inverse excitation type converter 8 are constituted, input dc power source unit 1 with
One end of input filter 2 connects, and the other end of input filter 2 is connected with one end of high-frequency inverter 3, high-frequency inverter
The other end of 3 is connected with the armature winding of high frequency transformer 4, and the secondary windings of high frequency transformer 4 is defeated with frequency converter 5
Entering end to connect, the outfan of frequency converter 5 is connected with the input of output derided capacitors 6, the output of output derided capacitors 6
Hold and be connected with output AC load 7, couple high frequency electrical isolation between output AC load 7 and input dc power source unit 1 anti-
Excitation type converter 8.
Shown in Fig. 1, described input filter 2 includes input filter inductance LiWith input filter capacitor Ci, wherein, defeated
Enter DC source UiReference positive pole and input filter inductance LiOne end connect, input filter inductance LiThe other end respectively with
Input filter capacitor CiPositive pole and boost inductance L one end connect, the negative pole of input filter capacitor Ci and input DC power
UiReference negative pole connect.
Described high frequency transformer 4, as it is shown in figure 1, this described high frequency transformer 4 is made up of a high frequency transformer T1, its bag
Include the first primary side winding N1, the second primary side winding N2 and the 3rd vice-side winding N3, the 4th vice-side winding N4.
Described high-frequency inverter 3 includes boost inductance L, the first power switch tube S 1 and the first diode D1, the second power
Switching tube S2 and the second diode D2, the 3rd power switch tube S 3 and the 3rd diode D3, the 4th power switch tube S 4 and
Four diode D4, wherein:
The drain electrode of the first power switch tube S 1 respectively with the other end and the drain electrode phase of the second power switch tube S 2 of boost inductance L
Even, the source electrode of the first power switch tube S 1 connects in the drain electrode of the 3rd power switch tube S 3, the source of the second power switch tube S 2
Pole is connected with the non-same polarity of the first primary side winding N1, the Same Name of Ends of the first primary side winding N1 and the second primary side winding N2 same
Name end is connected with the source electrode of the first power switch tube S 1 and the drain electrode of the 3rd power switch tube S 3 after connecting, the 3rd power switch pipe
The source electrode of the source electrode of S3 and the 4th power switch tube S 4 is connected with the negative pole of input filter 2 after connecting, then with input dc power
Source UiNegative pole connect, the drain electrode of the 4th power switch pipe is connected with the non-same polarity of the second primary side winding N2, the first diode
D1, the second diode D2, the 3rd diode D3, the 4th diode D4 respectively inverse parallel in the first power switch tube S 1, the
The two ends of two power switch tube S the 2, the 3rd power switch tube S the 3, the 4th power switch tube S 4, the negative electrode D1 of the i.e. first diode
Drain electrode with the first power switch tube S 1 is connected, and the anode of the first diode D1 and the source electrode of the first power switch tube S 1 connect,
The negative electrode of the second diode D2 and the drain electrode of the second power switch tube S 2 connect, the anode of the second diode D2 and the second power
The source electrode of switching tube S2 connects, and the negative electrode of the 3rd diode D3 and the drain electrode of the 3rd power switch tube S 3 connect, the three or two pole
The anode of pipe D3 and the source electrode of the 3rd power switch tube S 3 connect, the negative electrode of the 4th diode D4 and the 4th power switch tube S 4
Drain electrode connect, the source electrode connection of the anode of the 4th diode D4 and the 4th power switch tube S 4；
The non-same polarity of the first primary side winding N1 of described high frequency transformer 4 and the source electrode of the second power switch tube S 2 connect, the
The Same Name of Ends of the Same Name of Ends of one primary side winding N1 and the second primary side winding N2 connect after with the drain electrode of the 3rd power switch tube S 3,
The source electrode of the first power switch tube S 1 connects, the non-same polarity of the second primary side winding N2 and the drain electrode of the 4th power switch tube S 4
Connect；The Same Name of Ends of the 3rd vice-side winding N3 of high frequency transformer 4 and the drain electrode of the 5th power switch tube S 5 connect, and the 3rd is secondary
The non-same polarity of the non-same polarity of limit winding N3 and the 4th vice-side winding N4 connects, the Same Name of Ends of the 4th vice-side winding N4 and the
The drain electrode of seven power switch tube S 7 connects.
Described frequency converter 5 includes the first four-quadrant power switch tube S A, the second four-quadrant power switch tube S B, and high frequency becomes
The Same Name of Ends of the 3rd vice-side winding N3 of depressor 4 is connected with the drain electrode of the 5th power switch tube S 5 of described frequency converter 5,
The negative electrode of the 5th diode D5 links together, the source electrode of the 5th power switch tube S 5, the anode of the 5th diode D5,
The source electrode of six power switch tube S 6, the anode of the 6th diode D6 link together, the 4th vice-side winding of high frequency transformer 4
The negative electrode of the Same Name of Ends of N4 and the drain electrode of the 7th power tube S7 and the 7th diode D7 connects, the source of the 7th power switch tube S 7
Pole, the anode of the 7th diode D7, the source electrode of the 8th power switch tube S 8, the anode of the 8th diode D8 link together,
The drain electrode of the 6th power switch tube S 6 is connected with the positive pole of the first derided capacitors C1, the negative pole and second of the first derided capacitors C1
The positive pole of derided capacitors C2 connects with the non-same polarity of the 3rd vice-side winding N3 and the non-same polarity of the 4th vice-side winding N4 after connecting
Connecing, the drain electrode of the 8th power switch tube S 8 is connected with the negative pole of the second derided capacitors C2, the 5th power switch tube S the 5, the 6th merit
Rate switching tube S6, the 5th diode D5, the 6th diode D6 constitute the first four-quadrant power switch tube S A, and the 7th power is opened
Close pipe S7, the 8th power switch tube S the 8, the 7th diode D7, the 8th diode D8 constitute the second four-quadrant power switch pipe
SB, the first four-quadrant power switch tube S A, bis-four-quadrant power switch pipes of the second four-quadrant power switch tube S B constitute described
Frequency converter.
Described output derided capacitors 6 includes the first derided capacitors C1 and the second derided capacitors C2, wherein, the first derided capacitors C1
Positive pole be connected with the drain electrode of the 6th power switch tube S 6 in frequency converter 5, the negative electrode of the 6th diode D6, first point
The negative pole of voltage capacitance C1 and the non-same polarity of the positive pole of the second derided capacitors C2 and the 3rd vice-side winding N3 connect, the second dividing potential drop
The negative electrode of the negative pole of electric capacity C2 and the drain electrode of the 8th power switch tube S 8 and the 8th diode D8 connects.
Described output AC load 7 includes AC load ZL, AC load ZLTwo ends respectively with the first derided capacitors C1 just
The negative pole of pole and the second derided capacitors C2 connects.
Described high frequency electrical isolation inverse excitation type converter 8 is energy feedback circuit, and it includes the 9th power switch tube S 9, the 9th 2
Pole pipe D9, the tenth power switch tube S 10, the tenth diode D10, the 11st power switch tube S 11, the 11st diode D11,
12nd diode D12, flyback transformer T2, the 13rd power switch tube S 13, the 13rd diode D13, the 14th
Power switch tube S 14, the 14th diode D14, wherein: the source electrode of the 9th power switch tube S 9 and the 9th diode D9's
Anode connects, the drain electrode of the 9th power switch tube S 9 and the negative electrode of the 9th diode D9 and the negative electrode of the 11st diode D11
Connecting, the anode of the 11st diode D11 is connected with the non-same polarity of flyback transformer T2 the 5th primary side winding N5, and the tenth
The source electrode of power switch tube S 10 and the anode of the tenth diode D10 connect, the drain electrode and the 12nd of the tenth power switch tube S 10
The negative electrode of pole pipe D10 and the negative electrode of the 12nd diode D12 connect, the anode of the 12nd diode D12 and inverse-excitation type transformation
The Same Name of Ends of device T2 the 6th primary side winding N6 connects, the source electrode of the 9th power switch tube S 9 and the tenth power switch tube S 10
With input DC power U after source electrode connectioniPositive pole connect, the Same Name of Ends of flyback transformer T2 the 5th primary side winding N5 and the
Input DC power U after the non-same polarity connection of six primary side winding N6iNegative pole connect, the 7th secondary of flyback transformer T2
The Same Name of Ends of winding N7 and the positive pole of the first derided capacitors C1 connect, the non-same polarity of flyback transformer T2 and the 13rd merit
The drain electrode of rate switching tube S13, the negative electrode of the 13rd diode D13 connect, the source electrode of the 13rd power switch tube S 13, the tenth
The anode of three diode D13, the source electrode of the 14th power switch tube S 14, the anode of the 14th diode D14 link together,
The drain electrode of the 14th power switch tube S 14 be connected with the negative electrode of the 14th diode D14 after with the negative pole of the second derided capacitors C2
Link together.
Below in conjunction with the accompanying drawings the present invention is described in further detail.
In conjunction with accompanying drawing 1, the high-frequency isolation type boost type three-level inverter that the present embodiment proposes, by the input direct-current being sequentially connected with
Power subsystem 1, input filter 2, high-frequency inverter 3, high frequency transformer 4, frequency converter 5, output derided capacitors 6
Constitute with output AC load 7, high frequency electrical isolation inverse excitation type converter 8, use the impulse modulation SPWM of active-clamp to cut
The control mode of ripple.As unstable high input voltage direct current UiTo AC load ZLDuring transmission power, output filter capacitor C1,
C2 is sufficiently large and can divide equally output voltage, and being considered as two voltage effective values is U0The voltage source of/2 so that input cycle
The maximum voltage stress that the power switch pipe of changer bears is U0/ 2, the voltage that the power switch pipe of output frequency converter bears
Stress is 0, U0/2、U0Three kinds of voltages, due to Boost type changer can only boost can not blood pressure lowering, so cannot obtain output electricity
Drops and absolute value | u0| ＜ UiN2/N1The sine wave output shape of period, in order to ensure sinusoidal output waveform quality this period, solves
Certainly output filter capacitor and the whereabouts problem of load quadergy, add between output loading and input power high frequency electrical every
From inverse excitation type converter energy back circuit.Boost circuit and flyback energy feedback circuit time-sharing work, by detection output electricity
The polarity of pressure or error voltage determines, the absolute value of output voltage feedback signal compares with the absolute value of reference sinusoidal signal, warp
Obtaining error amplification signal after crossing error amplification signal device, when this signal is more than 0, inverse excitation type converter does not works, and Boost converts
Device works, and when this signal is less than 0, Boost does not works, and inverse excitation type converter works, the energy on output filter capacitor
Amount feeds back to input power, it is ensured that sinusoidal wave output voltage quality, and now corresponding output voltage declines and absolute value
|u0| ＜ UiN2/N1Period.This inverter has a four-quadrant operation ability, therefore can band perception, capacitive, resistive and rectification
Load, the control circuit of this inverter can be adjusted according to the character of AC load, thus be stablized or adjustable at outfan
Voltage.
Although the present invention is disclosed above with preferred embodiment, so it is not limited to the present invention.The technical field of the invention
Middle tool usually intellectual, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, originally
The protection domain of invention is when being as the criterion depending on those as defined in claim.
Claims (1)
1. a high frequency isolation type boosting three-level inverter, it is characterized in that, it is made up of the input dc power source unit (1) being sequentially connected with, input filter (2), high-frequency inverter (3), high frequency transformer (4), frequency converter (5), output derided capacitors (6), output AC load (7), high frequency electrical isolation inverse excitation type converter (8), wherein, input dc power source unit (1) includes input DC power (Ui), input DC power (Ui) be connected with one end of input filter (2), the other end of input filter (2) is connected with one end of high-frequency inverter (3), the other end of high-frequency inverter (3) is connected with the armature winding of high frequency transformer (4), the secondary windings of high frequency transformer (4) is connected with the input of frequency converter (5), the outfan of frequency converter (5) is connected with the input of output derided capacitors (6), the outfan of output derided capacitors (6) is connected with output AC load (7), high frequency electrical isolation inverse excitation type converter (8) is coupled between output AC load (7) and input dc power source unit (1)；
Described input filter (2) includes input filter inductance (Li) and input filter capacitor (Ci), wherein, input DC power (Ui) reference positive pole and input filter inductance (Li) one end connect, input filter inductance (Li) the other end respectively with input filter capacitor (Ci) positive pole and one end of boost inductance (L) connect, the negative pole of input filter capacitor (Ci) and input DC power (Ui) reference negative pole connect；
Described high frequency transformer (4) includes the first primary side winding (N1), the second primary side winding (N2) and the 3rd vice-side winding (N3), the 4th vice-side winding (N4)；
Described high-frequency inverter (3) includes boost inductance (L), the first power switch pipe (S1) and the first diode (D1), second power switch pipe (S2) and the second diode (D2), 3rd power switch pipe (S3) and the 3rd diode (D3), 4th power switch pipe (S4) and the 4th diode (D4), wherein:
The drain electrode of the first power switch pipe (S1) is connected with the other end of boost inductance (L) and the drain electrode of the second power switch pipe (S2) respectively, the source electrode of the first power switch pipe (S1) connects in the drain electrode of the 3rd power switch pipe (S3), the source electrode of the second power switch pipe (S2) and the non-same polarity of the first primary side winding (N1) connect, the Same Name of Ends of the first primary side winding (N1) and the Same Name of Ends of the second primary side winding (N2) are connected with the source electrode of the first power switch pipe (S1) and the drain electrode of the 3rd power switch pipe (S3) after connecting, the source electrode of the 3rd power switch pipe (S3) and the source electrode of the 4th power switch pipe (S4) are connected with the negative pole of input filter (2) after connecting, again with input DC power (Uinull) negative pole connect，The drain electrode of the 4th power switch pipe is connected with the non-same polarity of the second primary side winding (N2)，First diode (D1)、Second diode (D2)、3rd diode (D3)、The inverse parallel respectively of 4th diode (D4) is in the first power switch pipe (S1)、Second power switch pipe (S2)、3rd power switch pipe (S3)、The two ends of the 4th power switch pipe (S4)，The negative electrode (D1) of the i.e. first diode is connected with the drain electrode of the first power switch pipe (S1)，The anode of the first diode (D1) and the source electrode of the first power switch pipe (S1) connect，The negative electrode of the second diode (D2) and the drain electrode of the second power switch pipe (S2) connect，The anode of the second diode (D2) and the source electrode of the second power switch pipe (S2) connect，The negative electrode of the 3rd diode (D3) and the drain electrode of the 3rd power switch pipe (S3) connect，The anode of the 3rd diode (D3) and the source electrode of the 3rd power switch pipe (S3) connect，The negative electrode of the 4th diode (D4) and the drain electrode of the 4th power switch pipe (S4) connect，The anode of the 4th diode (D4) and the source electrode of the 4th power switch pipe (S4) connect；
The non-same polarity of first primary side winding (N1) of described high frequency transformer (4) and the source electrode of the second power switch pipe (S2) connect, the Same Name of Ends of the first primary side winding (N1) and the Same Name of Ends of the second primary side winding (N2) are connected with drain electrode, the source electrode of the first power switch pipe (S1) of the 3rd power switch pipe (S3) after connecting, and the non-same polarity of the second primary side winding (N2) and the drain electrode of the 4th power switch pipe (S4) connect；The Same Name of Ends of the 3rd vice-side winding (N3) of high frequency transformer (4) and the drain electrode of the 5th power switch pipe (S5) connect, the non-same polarity of the 3rd vice-side winding (N3) and the non-same polarity of the 4th vice-side winding (N4) connect, and the Same Name of Ends of the 4th vice-side winding (N4) and the drain electrode of the 7th power switch pipe (S7) connect；
nullDescribed frequency converter (5) includes the first four-quadrant power switch pipe (SA)、Second four-quadrant power switch pipe (SB)，The Same Name of Ends of the 3rd vice-side winding (N3) of high frequency transformer (4) is connected with the drain electrode of the 5th power switch pipe (S5) of described frequency converter (5)，The negative electrode of the 5th diode (D5) links together，The source electrode of the 5th power switch pipe (S5)、The anode of the 5th diode (D5)、The source electrode of the 6th power switch pipe (S6)、The anode of the 6th diode (D6) links together，The Same Name of Ends of the 4th vice-side winding (N4) of high frequency transformer (4) and the negative electrode of the drain electrode of the 7th power tube (S7) and the 7th diode (D7) connect，The source electrode of the 7th power switch pipe (S7)、The anode of the 7th diode (D7)、The source electrode of the 8th power switch pipe (S8)、The anode of the 8th diode (D8) links together，The drain electrode of the 6th power switch pipe (S6) is connected with the positive pole of the first derided capacitors (C1)，The negative pole of the first derided capacitors (C1) and the positive pole of the second derided capacitors (C2) are connected with the non-same polarity of the 3rd vice-side winding (N3) and the non-same polarity of the 4th vice-side winding (N4) after connecting，The drain electrode of the 8th power switch pipe (S8) is connected with the negative pole of the second derided capacitors (C2)，5th power switch pipe (S5)、6th power switch pipe (S6)、5th diode (D5)、6th diode (D6) constitutes the first four-quadrant power switch pipe (SA)，7th power switch pipe (S7)、8th power switch pipe (S8)、7th diode (D7)、8th diode (D8) constitutes the second four-quadrant power switch pipe (SB)，First four-quadrant power switch pipe (SA)、Second four-quadrant power switch pipe (SB) two four-quadrant power switch pipe constitutes described frequency converter；
Described output derided capacitors (6) includes the first derided capacitors (C1) and the second derided capacitors (C2), wherein, the drain electrode of the 6th power switch pipe (S6) in the positive pole of the first derided capacitors (C1) and frequency converter (5), the negative electrode of the 6th diode (D6) connects, the negative pole of the first derided capacitors (C1) and the non-same polarity of the positive pole of the second derided capacitors (C2) and the 3rd vice-side winding (N3) connect, the negative pole of the second derided capacitors (C2) and the negative electrode of the drain electrode of the 8th power switch pipe (S8) and the 8th diode (D8) connect；
Described output AC load (7) includes AC load (ZL), AC load (ZL) two ends be connected with the positive pole of the first derided capacitors (C1) and the negative pole of the second derided capacitors (C2) respectively；
nullDescribed high frequency electrical isolation inverse excitation type converter (8) is energy feedback circuit，It includes the 9th power switch pipe (S9)，9th diode (D9)，Tenth power switch pipe (S10)，Tenth diode (D10)，11st power switch pipe (S11)，11st diode (D11)，12nd diode (D12)，Flyback transformer (T2)，13rd power switch pipe (S13)，13rd diode (D13)，14th power switch pipe (S14)，14th diode (D14)，Wherein: the source electrode of the 9th power switch pipe (S9) and the anode of the 9th diode (D9) connect，The drain electrode of the 9th power switch pipe (S9) is connected with the negative electrode of the 9th diode (D9) and the negative electrode of the 11st diode (D11)，The anode of the 11st diode (D11) is connected with the non-same polarity of flyback transformer (T2) the 5th primary side winding (N5)，The source electrode of the tenth power switch pipe (S10) and the anode of the tenth diode (D10) connect，The drain electrode of the tenth power switch pipe (S10) is connected with the negative electrode of the tenth diode (D10) and the negative electrode of the 12nd diode (D12)，The anode of the 12nd diode (D12) is connected with the Same Name of Ends of flyback transformer (T2) the 6th primary side winding (N6)，With input DC power (U after the source electrode of the 9th power switch pipe (S9) and the source electrode connection of the tenth power switch pipe (S10)i) positive pole connect, input DC power (U after the Same Name of Ends of flyback transformer (T2) the 5th primary side winding (N5) and the non-same polarity connection of the 6th primary side winding (N6)i) negative pole connect, the Same Name of Ends of the 7th vice-side winding (N7) of flyback transformer (T2) and the positive pole of the first derided capacitors (C1) connect, the non-same polarity of flyback transformer (T2) and the drain electrode of the 13rd power switch pipe (S13), the negative electrode of the 13rd diode (D13) connects, the source electrode of the 13rd power switch pipe (S13), the anode of the 13rd diode (D13), the source electrode of the 14th power switch pipe (S14), the anode of the 14th diode (D14) links together, the drain electrode of the 14th power switch pipe (S14) links together with the negative pole of the second derided capacitors (C2) after being connected with the negative electrode of the 14th diode (D14).
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| CN107947615A (en) * | 2017-12-06 | 2018-04-20 | 上海海事大学 | Mixed type gird-connected inverter |
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| CN101026336A (en) * | 2006-02-22 | 2007-08-29 | 上海沪工电焊机制造有限公司 | Dual switch flyback switch circuit for inverter welding machine |
| CN101267167A (en) * | 2008-01-09 | 2008-09-17 | 福州大学 | Voltage increase high-frequency link reverser |
| CN204013274U (en) * | 2014-05-25 | 2014-12-10 | 南京理工大学 | High-frequency isolation type boost type three-level inverter |
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| CN101026336A (en) * | 2006-02-22 | 2007-08-29 | 上海沪工电焊机制造有限公司 | Dual switch flyback switch circuit for inverter welding machine |
| CN101267167A (en) * | 2008-01-09 | 2008-09-17 | 福州大学 | Voltage increase high-frequency link reverser |
| CN204013274U (en) * | 2014-05-25 | 2014-12-10 | 南京理工大学 | High-frequency isolation type boost type three-level inverter |
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Inventor after: Li Lei Inventor after: Xu Jiamei Inventor after: Xiang Zeyu Inventor after: Liu Cheng Inventor after: Pan Min Inventor before: Xu Jiamei Inventor before: Li Lei Inventor before: Xiang Zeyu Inventor before: Liu Cheng Inventor before: Pan Min |
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