CN103986360A - High-frequency isolated type boost three-level inverter - Google Patents
High-frequency isolated type boost three-level inverter Download PDFInfo
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- CN103986360A CN103986360A CN201410223599.5A CN201410223599A CN103986360A CN 103986360 A CN103986360 A CN 103986360A CN 201410223599 A CN201410223599 A CN 201410223599A CN 103986360 A CN103986360 A CN 103986360A
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Abstract
The invention provides a high-frequency isolated type boost three-level inverting circuit which is composed of a Boost inverting circuit and a flyback type energy feedback circuit. The Boost inverting circuit is composed of an input direct-current power supply unit, an input filter, a high-frequency inverter, a high-frequency transformer, a frequency converter, an output filtering capacitor and an output alternating-current load which are sequentially connected. A Boost converter can only increase the voltage and can not decrease the voltage, so that the output voltage can not be decreased, and the voltage can not meet the requirement for the output sine waveform. In order to ensure the quality of the output sine waveform in the period and solve the problem of the orientation of reactive energy of the output filtering capacitor and the load, the high-frequency electrical isolation flyback type converter energy feedback circuit is added between the output load and an input power supply. The inverter has the advantages that the number of power conversion stages is small, the number of power switching devices is small, input ripple waves are small, the voltage stress of a power switching tube is low, the dual-directional power stream and high-frequency electrical isolation are achieved, and the spectrum characteristic of the voltage at the front end of the output filter 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
At present both at home and abroad power electronics researcher is for the research of straight-AC-AC converter, mainly concentrate on two level such as non-electrical isolation formula, low frequency and high frequency electrical isolation formula straight-AC-AC converter; Research for multi-level converter, mainly concentrate on many level straight-straight, hand over-hand over and straight-friendship-DC converter, for many level straight-research of AC-AC converter is considerably less, and be only confined to non-isolated, low frequency or intermediate frequency isolated straight-the many level of friendship type are straight-AC-AC converter and fewer to the inverter research of many level of high frequency isolation type two stage power conversion.
Multi-electrical level inverter mainly contains three class topological structures: (1) Diode-clamped inverter, (2) capacitor-clamped type inverter, (3) have the cascaded inverter of independent DC power supply direct current.Diode-clamped, capacitor-clamped type multi-electrical level inverter have advantages of applicable and high input voltage high-power inverter occasion: the cascade multilevel inverter with independent DC power supply has and is applicable to low input, high output voltage high power contravariant occasion.But diode-clamped, the flat inversion transformation technique of capacitor-clamped many level of type multiple spot exist topological form single, without defects such as electrical isolation: there is the defects such as the complicated input side power factor of circuit topology is low, conversion efficiency is on the low side, power density is low in the cascading multiple electrical level inversion transformation technique with independent DC power supply.
High frequency link inversion transformation technique has replaced the Industrial Frequency Transformer in low frequency link inversion transformation technique with high frequency transformer, has overcome the shortcoming of low frequency inversion transformation technique, has significantly improved the characteristic of inverter, will replace low frequency link inverter, is used widely.High Frequency Link 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, and corresponding speed is fast.In addition, more than system can be operated in 20kH, absence of audio noise, filtering is relatively easy, and more than power can reach kW.Therefore, no matter in constant voltage constant frequency field, or have very large practical value in voltage regulation and frequency modulation field, it is a following important topic that continues research and development.
Up to now, people have obtained significant achievement to the research of buck, buck-boost type high frequency link DC-AC converter, but buck, buck-boost type high frequency link DC-AC converter exist, and input current ripple is large, reliability low (buck type) during load short circuits, the defects such as output capacity little (buck-boost).Research to Boost code converter, mainly concentrate on Boost type DC-DC, AC-AC, AC-DC converter, comprise non-electrical isolation formula and electrical isolation formula, research to Boost type three-level converter mainly concentrates on without isolating transformer type, and for the Boost type three-level converter with isolating transformer particularly with the research of the Boost type three-level inverter of isolating transformer also seldom.Theoretical for construction system, complete high frequency link inversion transformation technique, be necessary to seek and further investigate novel high-frequency isolated form boost type three-level inverter.
Summary of the invention
The object of the invention is to provide a kind of high-frequency isolation type boost type three-level inverter, has that power conversion progression is few, device for power switching is few, input ripple is little, power switch pipe voltage stress is low, bidirectional power flow, high frequency electrical isolation, the good characteristic of output filter front voltage spectral characteristic.
For reaching above-mentioned purpose, the technical solution adopted in the present invention is as follows:
A kind of high frequency isolation type three-level inverter that boosts, by the input dc power source unit connecting successively, input filter, high-frequency inverter, high frequency transformer, frequency converter, output dividing potential drop electric capacity, output AC load forms, high frequency electrical isolation inverse excitation type converter forms, wherein, input dc power source unit comprises input DC power, input DC power is connected with one end of input filter, the other end of input filter is connected with one end of high-frequency inverter, the other end of high-frequency inverter is connected with the armature winding of high frequency transformer, the secondary winding of high frequency transformer is connected with the input of frequency converter, the output of frequency converter is connected with the input of output dividing potential drop electric capacity, the output of output dividing potential drop electric capacity is connected with output AC load, between output AC load and input dc power source unit, connect high frequency electrical isolation inverse excitation type converter.
Further in embodiment, described input filter comprises input filter inductance and input filter capacitor, wherein, the reference positive pole of input DC power is connected with one end of input filter inductance, the other end of input filter inductance is connected with the positive pole of input filter capacitor and one end of boost inductance respectively, and the negative pole of input filter capacitor is connected with the reference negative pole of input DC power;
Described high frequency transformer comprises the first former limit winding, the second former limit winding and the 3rd secondary winding, fourth officer limit winding;
Described high-frequency inverter comprises boost inductance, the first power switch pipe and the first diode, the second power switch pipe and the second diode, and 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, the source electrode of the first power switch pipe connects in the drain electrode of the 3rd power switch pipe, the source electrode of the second power switch pipe is connected with the non-same polarity of the first former limit winding, after being connected with the Same Name of Ends of the second former limit winding, the Same Name of Ends of the first former limit winding is connected with the drain electrode of the 3rd power switch pipe with the source electrode of the first power switch pipe, after being connected with the source electrode of the 4th power switch pipe, the source electrode of the 3rd power switch pipe is connected with the negative pole of input filter, be connected with the negative pole of input DC power again, the drain electrode of the 4th power switch pipe is connected with the non-same polarity of the second former limit winding, the first diode, the second diode, the 3rd diode, the 4th diode difference inverse parallel is in the first power switch pipe, the second power switch pipe, the 3rd power switch pipe, the two ends of the 4th power switch pipe, the negative electrode of the first diode is connected with the drain electrode of the first power switch pipe, the anode of the first diode is connected with the source electrode of the first power switch pipe, the negative electrode of the second diode is connected with the drain electrode of the second power switch pipe, the anode of the second diode is connected with the source electrode of the second power switch pipe, the negative electrode of the 3rd diode is connected with the drain electrode of the 3rd power switch pipe, the anode of the 3rd diode is connected with the source electrode of the 3rd power switch pipe, the negative electrode of the 4th diode is connected with the drain electrode of the 4th power switch pipe, the anode of the 4th diode is connected with the source electrode of the 4th power switch pipe,
The non-same polarity of the first former limit winding of described high frequency transformer is connected with the source electrode of the second power switch pipe, after the Same Name of Ends of the first former limit winding is connected with the Same Name of Ends of the second former limit winding, be connected with the drain electrode of the 3rd power switch pipe, the source electrode of the first power switch pipe, the non-same polarity of the second former limit winding is connected with the drain electrode of the 4th power switch pipe; The Same Name of Ends of the 3rd secondary winding of high frequency transformer is connected with the drain electrode of the 5th power switch pipe, and the non-same polarity of the 3rd secondary winding is connected with the non-same polarity of fourth officer limit winding, and the Same Name of Ends of fourth officer limit winding is connected with the drain electrode of the 7th power switch pipe;
Described frequency converter comprises the first four-quadrant power switch pipe, the second four-quadrant power switch pipe, the Same Name of Ends of the 3rd secondary winding of high frequency transformer is connected with the drain electrode of the 5th power switch pipe of described frequency converter, the negative electrode of the 5th diode links 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, together, the Same Name of Ends of fourth officer limit winding and the drain electrode of the 7th power tube of high frequency transformer are connected with the negative electrode of the 7th diode the anodic bonding of the 6th diode, 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 anodic bonding of the 8th diode together, the drain electrode of the 6th power switch pipe is connected with the positive pole of the first dividing potential drop electric capacity, after being connected with the positive pole of the second dividing potential drop electric capacity, the negative pole of the first dividing potential drop electric capacity is connected with the non-same polarity of fourth officer limit winding with the non-same polarity of the 3rd secondary winding, the drain electrode of the 8th power switch pipe is connected with the negative pole of the second dividing potential drop electric capacity, the 5th power switch pipe, the 6th power switch pipe, the 5th diode, the 6th diode forms the first four-quadrant power switch pipe, the 7th power switch pipe, the 8th power switch pipe, the 7th diode, the 8th diode forms the second four-quadrant power switch pipe, the first four-quadrant power switch pipe, the second two of four-quadrant power switch pipes four-quadrant power switch pipe forms described frequency converter,
Described output dividing potential drop electric capacity comprises the first dividing potential drop electric capacity and the second dividing potential drop electric capacity, wherein, the positive pole of the first dividing potential drop electric capacity is connected with the drain electrode of the 6th power switch pipe in frequency converter, the negative electrode of the 6th diode, the negative pole of the first dividing potential drop electric capacity is connected with the non-same polarity of the 3rd secondary winding with the positive pole of the second dividing potential drop electric capacity, and the negative pole of the second dividing potential drop electric capacity is connected with the negative electrode of the 8th diode with the drain electrode of the 8th power switch pipe;
Described output AC load comprises AC load, and the two ends of AC load are connected with the negative pole of the second dividing potential drop electric capacity with the positive pole of the first dividing potential drop electric capacity respectively;
Described high frequency electrical isolation inverse excitation type converter is energy feedback circuit, it comprises the 9th power switch pipe, the 9th diode, the tenth power switch pipe, the tenth diode, the 11 power switch pipe, the 11 diode, the 12 diode, flyback transformer, the 13 power switch pipe, the 13 diode, the 14 power switch pipe, the 14 diode, wherein: the anodic bonding of the source electrode of the 9th power switch pipe and the 9th diode, the drain electrode of the 9th power switch pipe is connected with the negative electrode of the 11 diode with the negative electrode of the 9th diode, the anode of the 11 diode is connected with the non-same polarity of limit, flyback transformer Wuyuan winding, the anodic bonding of the source electrode of the tenth power switch pipe and the tenth diode, the drain electrode of the tenth power switch pipe is connected with the negative electrode of the 12 diode with the negative electrode of the tenth diode, the anode of the 12 diode is connected with the Same Name of Ends of flyback transformer the 6th former limit winding, after being connected with the source electrode of the tenth power switch pipe, the source electrode of the 9th power switch pipe is connected with the positive pole of input DC power, after the Same Name of Ends of limit, flyback transformer Wuyuan winding is connected with the non-same polarity of the 6th former limit winding, the negative pole of input DC power connects, the Same Name of Ends of the 7th secondary winding of flyback transformer is connected with the positive pole of the first dividing potential drop electric capacity, the non-same polarity of flyback transformer and the drain electrode of the 13 power switch pipe, the negative electrode of the 13 diode connects, the source electrode of the 13 power switch pipe, the anode of the 13 diode, the source electrode of the 14 power switch pipe, the anodic bonding of the 14 diode together, after being connected, the 14 drain electrode of power switch pipe and the negative electrode of the 14 diode link together with the negative pole of the second dividing potential drop electric capacity.
From the above technical solution of the present invention shows that, beneficial effect of the present invention is:
(1) novel high-frequency isolated form boost type three-level inverter is compared with traditional B oost type inverter, inputting the maximum voltage stress that three level frequency converter switching tubes bear is 1/2nd output voltages, the maximum stress that the switching tube of output frequency converter bears is output voltage, has reduced the voltage stress of power switch.
(2) in input DC power and AC load, insert high-frequency isolation transformer, realized the electrical isolation of input side and load-side, the use of high-frequency isolation transformer has realized miniaturization, the lightweight of converter, has improved the efficiency of converter.
(3) compare with traditional multi-electrical level inverter, this inverter circuit topology is succinct, reduced power conversion progression, and can realize the two-way flow of power.
(4) between output loading and input power, set up high frequency electrical isolation inverse excitation type converter energy feedback circuit, guarantee sinewave output waveform quality, solved the whereabouts problem of output filter capacitor and load quadergy.
Accompanying drawing explanation
Fig. 1 is the boost circuit topology figure of three-level inverter of an embodiment of the present invention high frequency isolation type.
Embodiment
In order more to understand technology contents of the present invention, especially exemplified by specific embodiment and coordinate appended graphic being described as follows.
As shown in Figure 1, according to preferred embodiment of the present invention, high-frequency isolation type boost type three-level inverter, by the input dc power source unit 1 connecting successively, input filter 2, high-frequency inverter 3, high frequency transformer 4, frequency converter 5, output dividing potential drop electric capacity 6 and output AC load 7, high frequency electrical isolation inverse excitation type converter 8 forms, input dc power source unit 1 is 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 winding of high frequency transformer 4 is connected with the input of frequency converter 5, the output of frequency converter 5 is connected with the input of output dividing potential drop electric capacity 6, the output of output dividing potential drop electric capacity 6 is connected with output AC load 7, between output AC load 7 and input dc power source unit 1, connect high frequency electrical isolation inverse excitation type converter 8.
Shown in Fig. 1, described input filter 2 comprises input filter inductance L
iwith input filter capacitor C
i, wherein, input DC power U
ireference anodal with input filter inductance L
ione end connect, input filter inductance L
ithe other end respectively with input filter capacitor C
ipositive pole be connected with one end of boost inductance L, the negative pole of input filter capacitor Ci and input DC power U
ireference negative pole connect.
Described high frequency transformer 4, as shown in Figure 1, described in this, high frequency transformer 4 consists of a high frequency transformer T1, and it comprises the first former limit winding N1, the second former limit winding N2 and the 3rd secondary winding N3, fourth officer limit winding N4.
Described high-frequency inverter 3 comprises boost inductance L, the first power switch tube S 1 and the first diode D1, the second power switch tube S 2 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 the 4th diode D4, wherein:
The drain electrode of the first power switch tube S 1 is connected with the other end of boost inductance L and the drain electrode of the second power switch tube S 2 respectively, 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 electrode of the second power switch tube S 2 is connected with the non-same polarity of the first former limit winding N1, after being connected with the Same Name of Ends of the second former limit winding N2, the Same Name of Ends of the first former limit winding N1 is connected with the drain electrode of the 3rd power switch tube S 3 with the source electrode of the first power switch tube S 1, after being connected with the source electrode of the 4th power switch tube S 4, the source electrode of the 3rd power switch tube S 3 is connected with the negative pole of input filter 2, again with input DC power U
inegative pole connect, the drain electrode of the 4th power switch pipe is connected with the non-same polarity of the second former limit winding N2, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4 difference inverse parallel is in the first power switch tube S 1, the second power switch tube S 2, the 3rd power switch tube S 3, the two ends of the 4th power switch tube S 4, the negative electrode D1 of the first diode is connected with the drain electrode of the first power switch tube S 1, the anode of the first diode D1 is connected with the source electrode of the first power switch tube S 1, the negative electrode of the second diode D2 is connected with the drain electrode of the second power switch tube S 2, the anode of the second diode D2 is connected with the source electrode of the second power switch tube S 2, the negative electrode of the 3rd diode D3 is connected with the drain electrode of the 3rd power switch tube S 3, the anode of the 3rd diode D3 is connected with the source electrode of the 3rd power switch tube S 3, the negative electrode of the 4th diode D4 is connected with the drain electrode of the 4th power switch tube S 4, the anode of the 4th diode D4 is connected with the source electrode of the 4th power switch tube S 4,
The non-same polarity of the first former limit winding N1 of described high frequency transformer 4 is connected with the source electrode of the second power switch tube S 2, after the Same Name of Ends of the first former limit winding N1 is connected with the Same Name of Ends of the second former limit winding N2, be connected with the drain electrode of the 3rd power switch tube S 3, the source electrode of the first power switch tube S 1, the non-same polarity of the second former limit winding N2 is connected with the drain electrode of the 4th power switch tube S 4; The Same Name of Ends of the 3rd secondary winding N3 of high frequency transformer 4 is connected with the drain electrode of the 5th power switch tube S 5, the non-same polarity of the 3rd secondary winding N3 is connected with the non-same polarity of fourth officer limit winding N4, and the Same Name of Ends of fourth officer limit winding N4 is connected with the drain electrode of the 7th power switch tube S 7.
Described frequency converter 5 comprises the first four-quadrant power switch tube S A, the second four-quadrant power switch tube S B, the 3rd Same Name of Ends of secondary winding N3 of high frequency transformer 4 and the drain electrode of the 5th power switch tube S 5 of described frequency converter 5 are connected, , 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 the 6th power switch tube S 6, the anodic bonding of the 6th diode D6 together, the Same Name of Ends of fourth officer limit winding N4 and the drain electrode of the 7th power tube S7 of high frequency transformer 4 are connected with the negative electrode of the 7th diode D7, the source electrode of the 7th power switch tube S 7, the anode of the 7th diode D7, the source electrode of the 8th power switch tube S 8, the anodic bonding of the 8th diode D8 together, the drain electrode of the 6th power switch tube S 6 is connected with the positive pole of the first dividing potential drop capacitor C 1, after being connected with the positive pole of the second dividing potential drop capacitor C 2, the negative pole of the first dividing potential drop capacitor C 1 is connected with the non-same polarity of fourth officer limit winding N4 with the non-same polarity of the 3rd secondary winding N3, the drain electrode of the 8th power switch tube S 8 is connected with the negative pole of the second dividing potential drop capacitor C 2, the 5th power switch tube S 5, the 6th power switch tube S 6, the 5th diode D5, the 6th diode D6 forms the first four-quadrant power switch tube S A, the 7th power switch tube S 7, the 8th power switch tube S 8, the 7th diode D7, the 8th diode D8 forms the second four-quadrant power switch tube S B, 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 form described frequency converter.
Described output dividing potential drop electric capacity 6 comprises the first dividing potential drop capacitor C 1 and the second dividing potential drop capacitor C 2, wherein, the positive pole of the first dividing potential drop capacitor C 1 is 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, the negative pole of the first dividing potential drop capacitor C 1 is connected with the non-same polarity of the 3rd secondary winding N3 with the positive pole of the second dividing potential drop capacitor C 2, and the negative pole of the second dividing potential drop capacitor C 2 is connected with the negative electrode of the 8th diode D8 with the drain electrode of the 8th power switch tube S 8.
Described output AC load 7 comprises AC load Z
l, AC load Z
ltwo ends be connected with the negative pole of the second dividing potential drop capacitor C 2 with the positive pole of the first dividing potential drop capacitor C 1 respectively.
Described high frequency electrical isolation inverse excitation type converter 8 is energy feedback circuit, it comprises the 9th power switch tube S 9, the 9th diode D9, the tenth power switch tube S 10, the tenth diode D10, the 11 power switch tube S 11, the 11 diode D11, the 12 diode D12, flyback transformer T2, the 13 power switch tube S 13, the 13 diode D13, the 14 power switch tube S 14, the 14 diode D14, wherein: the anodic bonding of the source electrode of the 9th power switch tube S 9 and the 9th diode D9, the drain electrode of the 9th power switch tube S 9 is connected with the negative electrode of the 11 diode D11 with the negative electrode of the 9th diode D9, the anode of the 11 diode D11 is connected with the non-same polarity of flyback transformer T2 Wuyuan limit winding N5, the anodic bonding of the source electrode of the tenth power switch tube S 10 and the tenth diode D10, the drain electrode of the tenth power switch tube S 10 is connected with the negative electrode of the 12 diode D12 with the negative electrode of the tenth diode D10, the anode of the 12 diode D12 is connected with the Same Name of Ends of the former limit winding N6 of flyback transformer T2 the 6th, the source electrode of the 9th power switch tube S 9 is connected rear and input DC power U with the source electrode of the tenth power switch tube S 10
ipositive pole connect, the Same Name of Ends of flyback transformer T2 Wuyuan limit winding N5 is connected input DC power U afterwards with the non-same polarity of the 6th former limit winding N6
inegative pole connect, the Same Name of Ends of the 7th secondary winding N7 of flyback transformer T2 is connected with the positive pole of the first dividing potential drop capacitor C 1, the non-same polarity of flyback transformer T2 and the drain electrode of the 13 power switch tube S 13, the negative electrode of the 13 diode D13 connects, the source electrode of the 13 power switch tube S 13, the anode of the 13 diode D13, the source electrode of the 14 power switch tube S 14, the anodic bonding of the 14 diode D14 together, after being connected, the 14 drain electrode of power switch tube S 14 and the negative electrode of the 14 diode D14 link together with the negative pole of the second dividing potential drop capacitor C 2.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
By reference to the accompanying drawings 1, the high-frequency isolation type boost type three-level inverter that the present embodiment proposes, by the input dc power source unit 1 connecting successively, input filter 2, high-frequency inverter 3, high frequency transformer 4, frequency converter 5, output dividing potential drop electric capacity 6 and output AC load 7, high frequency electrical isolation inverse excitation type converter 8, formed, adopt the control mode of the pulse modulation SPWM copped wave of active-clamp.As unsettled high input voltage direct current U
ito AC load Z
lduring transmitted power, output filter capacitor C1, C2 are enough large and can divide equally output voltage, and can regard two voltage effective values as is U
0/ 2 voltage source, making to input the maximum voltage stress that the power switch pipe of frequency converter bears is U
0/ 2, the voltage stress that bears of power switch pipe of output frequency converter is 0, U
0/ 2, U
0three kinds of voltages, due to Boost code converter can only boost can not step-down, so cannot obtain output voltage, decline and absolute value | u
0| < U
in
2/ N
1sine wave output shape during this time, in order to ensure sinusoidal output waveform quality this period, solves the whereabouts problem of output filter capacitor and load quadergy, has added high frequency electrical isolation inverse excitation type converter energy back circuit between output loading and input power.Boost circuit and inverse-excitation type energy feedback circuit time-sharing work, by detecting the polarity of output voltage or error voltage, decide, the absolute value comparison of the absolute value of output voltage feedback signal and benchmark sinusoidal signal, after error amplification signal device, obtain error amplification signal, this signal is greater than at 0 o'clock, inverse excitation type converter is not worked, the work of Boost converter, this signal is less than at 0 o'clock, Boost converter is not worked, inverse excitation type converter work, the energy feedback on output filter capacitor to input power, guarantee sinusoidal wave output voltage quality, now corresponding output voltage declines and absolute value | u
0| < U
in
2/ N
1during this time.This inverter has four-quadrant operation ability, therefore can be with perception, capacitive, resistive and rectified load, and the control circuit of this inverter can be adjusted according to the character of AC load, thereby is stablized or adjustable voltage at output.
Although the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on claims person of defining.
Claims (2)
1. the high frequency isolation type three-level inverter that boosts, it is characterized in that, by the input dc power source unit (1) connecting successively, input filter (2), high-frequency inverter (3), high frequency transformer (4), frequency converter (5), output dividing potential drop electric capacity (6), output AC load, form (7), high frequency electrical isolation inverse excitation type converter (8) formation, wherein, input dc power source unit (1) comprises input DC power (U
i), input DC power (U
i) 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 winding of high frequency transformer (4) is connected with the input of frequency converter (5), the output of frequency converter (5) is connected with the input of output dividing potential drop electric capacity (6), the output of output dividing potential drop electric capacity (6) is connected with output AC load (7), between output AC load (7) and input dc power source unit (1), connect high frequency electrical isolation inverse excitation type converter (8).
2. the high frequency isolation type according to claim 1 three-level inverter that boosts, is characterized in that, described input filter (2) comprises input filter inductance (L
i) and input filter capacitor (C
i), wherein, input DC power (U
i) reference anodal with input filter inductance (L
i) one end connect, input filter inductance (L
i) the other end respectively with input filter capacitor (C
i) positive pole be connected with one end of boost inductance (L), the negative pole of input filter capacitor (Ci) and input DC power (U
i) reference negative pole connect;
Described high frequency transformer (4) comprises the first former limit winding (N1), the second former limit winding (N2) and the 3rd secondary winding (N3), fourth officer limit winding (N4);
Described high-frequency inverter (3) comprises boost inductance (L), the first power switch pipe (S1) and the first diode (D1), the second power switch pipe (S2) and the second diode (D2), the 3rd power switch pipe (S3) and the 3rd diode (D3), the 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) is connected with the non-same polarity of the first former limit winding (N1), after being connected with the Same Name of Ends of the second former limit winding (N2), the Same Name of Ends of the first former limit winding (N1) is connected with the drain electrode of the 3rd power switch pipe (S3) with the source electrode of the first power switch pipe (S1), after being connected with the source electrode of the 4th power switch pipe (S4), the source electrode of the 3rd power switch pipe (S3) is connected with the negative pole of input filter (2), again with input DC power (U
i) negative pole connect, the drain electrode of the 4th power switch pipe is connected with the non-same polarity of the second former limit winding (N2), the first diode (D1), the second diode (D2), the 3rd diode (D3), the 4th diode (D4) difference inverse parallel is in the first power switch pipe (S1), the second power switch pipe (S2), the 3rd power switch pipe (S3), the two ends of the 4th power switch pipe (S4), the negative electrode of the first diode (D1) is connected with the drain electrode of the first power switch pipe (S1), the anode of the first diode (D1) is connected with the source electrode of the first power switch pipe (S1), the negative electrode of the second diode (D2) is connected with the drain electrode of the second power switch pipe (S2), the anode of the second diode (D2) is connected with the source electrode of the second power switch pipe (S2), the negative electrode of the 3rd diode (D3) is connected with the drain electrode of the 3rd power switch pipe (S3), the anode of the 3rd diode (D3) is connected with the source electrode of the 3rd power switch pipe (S3), the negative electrode of the 4th diode (D4) is connected with the drain electrode of the 4th power switch pipe (S4), the anode of the 4th diode (D4) is connected with the source electrode of the 4th power switch pipe (S4),
The non-same polarity of the first former limit winding (N1) of described high frequency transformer (4) is connected with the source electrode of the second power switch pipe (S2), after the Same Name of Ends of the first former limit winding (N1) is connected with the Same Name of Ends of the second former limit winding (N2), be connected with the drain electrode of the 3rd power switch pipe (S3), the source electrode of the first power switch pipe (S1), the non-same polarity of the second former limit winding (N2) is connected with the drain electrode of the 4th power switch pipe (S4); The Same Name of Ends of the 3rd secondary winding (N3) of high frequency transformer (4) is connected with the drain electrode of the 5th power switch pipe (S5), the non-same polarity of the 3rd secondary winding (N3) is connected with the non-same polarity of fourth officer limit winding (N4), and the Same Name of Ends of fourth officer limit winding (N4) is connected with the drain electrode of the 7th power switch pipe (S7);
Described frequency converter (5) comprises the first four-quadrant power switch pipe (SA), the second four-quadrant power switch pipe (SB), the Same Name of Ends of the 3rd secondary 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 anodic bonding of the 6th diode (D6) together, the Same Name of Ends of the fourth officer limit winding (N4) of high frequency transformer (4) is connected with the negative electrode of the 7th diode (D7) with the drain electrode of the 7th power tube (S7), 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 anodic bonding of the 8th diode (D8) together, the drain electrode of the 6th power switch pipe (S6) is connected with the positive pole of the first dividing potential drop electric capacity (C1), after being connected with the positive pole of the second dividing potential drop electric capacity (C2), the negative pole of the first dividing potential drop electric capacity (C1) is connected with the non-same polarity of fourth officer limit winding (N4) with the non-same polarity of the 3rd secondary winding (N3), the drain electrode of the 8th power switch pipe (S8) is connected with the negative pole of the second dividing potential drop electric capacity (C2), the 5th power switch pipe (S5), the 6th power switch pipe (S6), the 5th diode (D5), the 6th diode (D6) forms the first four-quadrant power switch pipe (SA), the 7th power switch pipe (S7), the 8th power switch pipe (S8), the 7th diode (D7), the 8th diode (D8) forms the second four-quadrant power switch pipe (SB), the first four-quadrant power switch pipe (SA), two four-quadrant power switch pipes of the second four-quadrant power switch pipe (SB) form described frequency converter,
Described output dividing potential drop electric capacity (6) comprises the first dividing potential drop electric capacity (C1) and the second dividing potential drop electric capacity (C2), wherein, the positive pole of the first dividing potential drop electric capacity (C1) is connected with the drain electrode of the 6th power switch pipe (S6) in frequency converter (5), the negative electrode of the 6th diode (D6), the negative pole of the first dividing potential drop electric capacity (C1) is connected with the non-same polarity of the 3rd secondary winding (N3) with the positive pole of the second dividing potential drop electric capacity (C2), and the negative pole of the second dividing potential drop electric capacity (C2) is connected with the negative electrode of the 8th diode (D8) with the drain electrode of the 8th power switch pipe (S8);
Described output AC load (7) comprises AC load (Z
l), AC load (Z
l) two ends be connected with the negative pole of the second dividing potential drop electric capacity (C2) with the positive pole of the first dividing potential drop electric capacity (C1) respectively;
Described high frequency electrical isolation inverse excitation type converter (8) is energy feedback circuit, it comprises the 9th power switch pipe (S9), the 9th diode (D9), the tenth power switch pipe (S10), the tenth diode (D10), the 11 power switch pipe (S11), the 11 diode (D11), the 12 diode (D12), flyback transformer (T2), the 13 power switch pipe (S13), the 13 diode (D13), the 14 power switch pipe (S14), the 14 diode (D14), wherein: the anodic bonding of the source electrode of the 9th power switch pipe (S9) and the 9th diode (D9), the drain electrode of the 9th power switch pipe (S9) is connected with the negative electrode of the 11 diode (D11) with the negative electrode of the 9th diode (D9), the anode of the 11 diode (D11) is connected with the non-same polarity of flyback transformer (T2) limit, Wuyuan winding (N5), the anodic bonding of the source electrode of the tenth power switch pipe (S10) and the tenth diode (D10), the drain electrode of the tenth power switch pipe (S10) is connected with the negative electrode of the 12 diode (D12) with the negative electrode of the tenth diode (D10), the anode of the 12 diode (D12) is connected with the Same Name of Ends of flyback transformer (T2) the 6th former limit winding (N6), the source electrode of the 9th power switch pipe (S9) is connected rear and input DC power (U with the source electrode of the tenth power switch pipe (S10)
i) positive pole connect, the Same Name of Ends of flyback transformer (T2) limit, Wuyuan winding (N5) is connected input DC power (U afterwards with the non-same polarity of the 6th former limit winding (N6)
i) negative pole connect, the Same Name of Ends of the 7th secondary winding (N7) of flyback transformer (T2) is connected with the positive pole of the first dividing potential drop electric capacity (C1), the non-same polarity of flyback transformer (T2) and the drain electrode of the 13 power switch pipe (S13), the negative electrode of the 13 diode (D13) connects, the source electrode of the 13 power switch pipe (S13), the anode of the 13 diode (D13), the source electrode of the 14 power switch pipe (S14), the anodic bonding of the 14 diode (D14) together, after being connected, the 14 drain electrode of power switch pipe (S14) and the negative electrode of the 14 diode (D14) link together with the negative pole of the second dividing potential drop electric capacity (C2).
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| CN107093958A (en) * | 2017-06-29 | 2017-08-25 | 中国航空工业集团公司雷华电子技术研究所 | A kind of DC converter |
| CN107947615A (en) * | 2017-12-06 | 2018-04-20 | 上海海事大学 | Mixed type gird-connected inverter |
| CN110022072A (en) * | 2019-05-23 | 2019-07-16 | 河北工业大学 | A kind of control system and method for current transformer energy feedback circuit |
| CN110212775A (en) * | 2019-06-13 | 2019-09-06 | 北京智芯微电子科技有限公司 | A kind of interleaving shunt-wound two-transistor forward power converter |
| CN111610387A (en) * | 2020-03-26 | 2020-09-01 | 深圳市鑫翊新能源科技有限公司 | Electronic load device and electronic load circuit |
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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107093958A (en) * | 2017-06-29 | 2017-08-25 | 中国航空工业集团公司雷华电子技术研究所 | A kind of DC converter |
| CN107947615A (en) * | 2017-12-06 | 2018-04-20 | 上海海事大学 | Mixed type gird-connected inverter |
| CN110022072A (en) * | 2019-05-23 | 2019-07-16 | 河北工业大学 | A kind of control system and method for current transformer energy feedback circuit |
| CN110212775A (en) * | 2019-06-13 | 2019-09-06 | 北京智芯微电子科技有限公司 | A kind of interleaving shunt-wound two-transistor forward power converter |
| CN111610387A (en) * | 2020-03-26 | 2020-09-01 | 深圳市鑫翊新能源科技有限公司 | Electronic load device and electronic load circuit |
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| CN103986360B (en) | 2016-10-05 |
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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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