CN102231600A - Novel full-bridge soft switch circuit applied to arc welding inverter power supply - Google Patents
Novel full-bridge soft switch circuit applied to arc welding inverter power supply Download PDFInfo
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- CN102231600A CN102231600A CN2011101905799A CN201110190579A CN102231600A CN 102231600 A CN102231600 A CN 102231600A CN 2011101905799 A CN2011101905799 A CN 2011101905799A CN 201110190579 A CN201110190579 A CN 201110190579A CN 102231600 A CN102231600 A CN 102231600A
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- transformer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention relates to a novel full-bridge soft switch circuit in which buffer capacitance and leakage inductance and saturated electrical inductance of a transformer are used for realizing soft switching of various power switch transistors. In the circuit, the driving signal time sequence of a power tube is similar to the time sequence of a conventional switching circuit driving signal, which makes control simpler; in one period, only two modals have duty ratio loss, and the two modals last a short time and have small duty ratio loss; and the soft switching achievement range is broadened by the saturated electrical inductance. Input direct current is divided into two power sources with equal voltage values, the power sources are accessed to the circuit through controlling Q5 or Q6, D7 and D8 diodes perform clamping action, and the zero current switch (ZCS) connection and zero voltage switch (ZVS) disconnection of the power switch transistors in the circuit are achieved by resonance of the buffer capacitance and the leakage inductance Ls and saturated electrical inductance L of the transformer. The full-bridge soft switch circuit inverts input direct current to high-frequency square wave alternating current; and after the voltage of the alternating current is reduced by the transformer, the high-frequency square wave alternating current is output to a rectification filtration circuit and then transmitted to a load.
Description
Technical field
The present invention relates to a kind of soft switch main circuit topology of Arc Welding Power of inversion direct current output, belong to the Technics of Power Electronic Conversion technology in the electrical technology subject.
Background technology
Arc Welding Power is a kind of low-voltage, high-current output, the general higher particular power source of power requirement at aspects such as dynamic response characteristic, reliabilities.The Arc Welding Power traditional relatively owing to contravariant arc welding power source has significant advantage to become a development trend of Arc Welding Power at aspects such as volume, weight, efficient and fast-responses.Conventional contravariant arc welding power source be adopt exchange input through do not control behind the current rectifying and wave filtering circuit carry out step-down through step-down transformer again to inverter circuit after rectifying and wave-filtering export to the mapping mode of load.There are problems such as efficient is not high, reliability is not high in the sort circuit topological structure.Therefore and Arc Welding Power is a kind of highly energy-consuming power consumption equipment and work under bad environment that is called as electricity-eating tiger, improves its efficient and reliability to now energy crisis, energy-conserving and environment-protective and promote aspect such as reliability of products very important meaning is arranged.Have at present many scientific research institutions with circuit application such as soft switch circuit such as FB-ZVS, FB-ZVZCS in contravariant arc welding power source, as publication number is to adopt the FB-ZVS circuit among the CN 1438760A, publication number is to adopt the FB-ZVZCS circuit among the CN 101234449A, but all there are the difficult problems such as soft switch, duty-cycle loss that realize of lagging leg in these two kinds of circuit.
Summary of the invention
The objective of the invention is to deficiency at the existence of foregoing circuit topology, propose a kind ofly to add auxiliary switch, clamping diode and nondestructive buffering electric capacity, realize by leakage inductance, the pulsactor resonance of nondestructive buffering electric capacity and transformer that all switching tube ZCS open with ZVS in the circuit and turn-off at inverter circuit inlet highway end.Switching tube to brachium pontis in this circuit topology is opened shutoff simultaneously, and auxiliary switch and main switch are open-minded simultaneously, leading t of main switch
sTurn-off, circuit working mode is simple.In one-period, only exist two mode intervals that duty-cycle loss is arranged, Chang Gui FB-ZVS relatively, FB-ZVZCS circuit duty-cycle loss is much smaller.Add pulsactor on the former limit of transformer, make circuit when zero load, underloading, still can realize soft switch.
Soft switch circuit of the present invention is made of input power supply, auxiliary network, full-bridge circuit, pulsactor, transformer, output rectifier and filter.The present invention's main characteristics compared with prior art is, the full bridge power switching tube drives brachium pontis does not need phase shift can realize that still ZCS opens, ZVS turn-offs, and auxiliary switch can be realized also that ZCS opens with ZVS and turn-offs simultaneously.It (is that one-period has only two mode to have duty-cycle loss that duty ratio just occurs in to the buffer capacitor mode of charging, and this mode duration is shorter), compare 6 operation modes (the whole process of secondary afterflow) that conventional FB-ZVS duty-cycle loss is present in one-period, duty-cycle loss reduces greatly.Former limit adds the soft-switching range that pulsactor can be widened the circuit power switch pipe greatly, makes contravariant arc welding power source still can realize soft switch in unloaded, underloading.
Description of drawings
Accompanying drawing 1 is a soft switch circuit structural representation of the present invention.
Accompanying drawing 2 is the main oscillograms of soft switch circuit mode of operation of the present invention.
Accompanying drawing 3-8 is the equivalent circuit structure schematic diagram of each switch mode
Main designation in the above-mentioned accompanying drawing:
V
In1=V
In2Be input power supply, Q
5, Q
6Be auxiliary switch, D
7, D
8Be clamping diode, C is a buffer capacitor.Q
1-Q
4Be full-bridge switch pipe, D
1-D
6Be respectively Q
1-Q
6The inverse parallel body diode, L
sBe transformer leakage inductance, L is a pulsactor, T
1Be high frequency transformer, K is the former secondary turn ratio of high frequency transformer, N
1Be the former limit winding of high frequency transformer, N
2Be subcarrier band centre cap winding two and half windings, D
R1, D
R2Be transformer secondary rectifier diode, L
fBe output inductor, C
oBe output filter capacitor, R
LBe load.
Embodiment
Accompanying drawing 1 narration circuit of the present invention is formed structure.Comprise input power supply 1, inlet highway auxiliary network 2, full-bridge circuit 3, pulsactor 4, high-frequency isolation transformer 5, output rectifier and filter 6.Wherein import power supply V
In1=V
In2, insulated gate bipolar transistor Q
5-Q
6And body diode D
5-D
6, clamping diode D
7-D
8, buffer capacitor C forms auxiliary network; Q
1-Q
4And body diode D
1-D
4Form full-bridge circuit; D
R1, D
R2, L
f, C
oForm output filter circuit.
Control method is as follows: Q
1, Q
4And Q
2, Q
3Open shutoff simultaneously, wherein Q
1, Q
4Cut-off signals and Q
2, Q
3Open between the signal exist one time of delay t
dQ
5, Q
6Respectively with switching tube Q
1(Q
4) and Q
2(Q
3) open-minded simultaneously, Q lags behind respectively
1(Q
4) and Q
2(Q
3) t
sTime turn-offs.
Be main circuit structure with accompanying drawing 1 below, 2-accompanying drawing 8 is narrated concrete operation principle of the present invention in conjunction with the accompanying drawings.By accompanying drawing 2 as can be known entire circuit at one-period 10 operation modes are arranged.Be respectively [t
0[t in the past],
0, t
1], [t
1, t
2], [t
2, t
3], [t
3, t
4], [t
5, t
5], [t
5, t
6], [t
6, t
7], [t
7, t
8], [t
8, t
9] (seeing accompanying drawing 2), wherein [t
0In the past, t
4] be preceding half period, [t
4, t
9] be the back half period, below the working condition of each switch mode is made a concrete analysis of.
Before analyzing, do following hypothesis: (1) all switching tubes and diode are desirable device; (2) all inductance, electric capacity and transformer are ideal element; (3) input power supply V
In1=V
In2(4) L
fEnough big, can equivalence be output current I for electric current
oCurrent source.
1, switch mode 1[t
0[corresponding to accompanying drawing 3] in the past]
t
0In the past, switching tube Q
1, Q
4, Q
5, D
8Conducting, secondary rectifying tube D
R1Conducting, rectifier diode D
R2End input power supply V
In1By full-bridge circuit, Transformer Winding N
1And current rectifying and wave filtering circuit is to the load transfer energy.
2, switch mode 2[t
0, t
1] [respective figure 4]
t
0Moment on-off switching tube Q
5, flow through Q
5Electric current transfer to the input buffering capacitor C immediately, the loop of formation is: C-Q
1-L-L
s-N
1-Q
4-capacitor C.Because of the capacitor C both end voltage is charged and is clamped to V in last mode
In1, switching tube Q
5Can realize that ZVS turn-offs.In this mode buffer capacitor discharge, its voltage is from V
In1Linearity drops to 0, and this moment, the primary current size was converted the electric current on former limit for secondary.The loop of transformer secondary is: last half secondary winding N
2-D
R1-L
f-R
L-N
2In this mode, because of D
8Be conducting to this mode by last mode and end D
7, D
8Two switching tubes are born the voltage at capacitor C two ends, D jointly
7The voltage at two ends is by V
In1Reducing to original half is V
In1/ 2.D
8Voltage rise to V by original no-voltage
In1/ 2.Along with capacitor discharge, the electric capacity both end voltage is linear to descend D
7, D
8The voltage at two ends also linearity drops to zero.V
AbAnd V
dAlso linearity drops to zero.When load was light, the electric current of being converted former limit by the load current of secondary was less, and the energy that then is stored on the transformer leakage inductance is less, and mode 3 will can not occur, and still in discharge, then caused Q up to mode 4 buffer capacitors
1And Q
4Do not realize that ZCS is open-minded.After adding pulsactor, when load was light, the pulsactor value was bigger, and the energy that then is stored in the pulsactor is bigger, has sufficient energy that the electric charge on the electric capacity is taken away in this mode, makes circuit can realize still that when underloading ZCS is open-minded.When circuit load was big, pulsactor was saturated, and its inductance value is less, and the energy that is stored in pulsactor is less, has reduced bigger loop current and loss that traditional increase leakage inductance or resonant inductance mode cause.
3, switch mode 3[t
1, t
2] [corresponding to accompanying drawing 5]
When buffer capacitor voltage drops to zero, Q
2, Q
3The body diode conducting, the transformer primary current has two loop: L-L
sThe former limit of-transformer winding N
1-Q
2Body diode D
2-Q
1-L; L-L
sThe former limit of-transformer winding N
1-Q
4-Q
3Body diode D
3-L because of two loop unanimities, respectively bears half electric current of the former limit of transformer winding.Former limit leakage inductance and pulsactor afterflow are because of primary current is not enough to provide the electric current of the enough loads of secondary, secondary rectifier diode D
R1, D
R2All conductings, two branch roads are respectively born the load current of half, the secondary short circuit in winding, the secondary winding voltage is zero.Do not have the energy consumption element in the winding of former limit, electric current remains unchanged, and leakage inductance, pulsactor voltage are zero, V
AbVoltage is zero.In this mode, there is not FB-ZVS duty-cycle loss problem.
4, switch mode 4[t
2, t
3] [corresponding to accompanying drawing 6]
At t
2Moment on-off switching tube Q
1, Q
4, because buffer capacitor voltage is zero, and D
2, D
3The conducting clamp makes Q
1, Q
4For ZVS turn-offs.Q
1, Q
4Have no progeny in the pass, energy stored is charged to capacitor C in leakage inductance and the pulsactor, when just beginning during the saturation current value of the less inductance that also do not reach capacity of electric current, pulsactor does not have saturated, inductance value is bigger, and along with electric current rises when electric current reaches capacity the saturation current of inductance setting, pulsactor is saturated, inductance value is very little, and current constant is a pulsactor saturation current value.The voltage at the capacitor C two ends linearity of starting from scratch is increased to V
In1At this moment, transformer primary current loop is: L-L
sThe former limit of-transformer winding N
1-Q
2Body diode D
2-capacitor C-Q
3Body diode D
3-L.Two rectifier diode D of transformer secondary
R1, D
R2Still conducting simultaneously.In this stage, the voltage on the former limit of transformer is non-vanishing, and secondary is because of two rectifier diode D
R1, D
R2It is zero that conducting simultaneously makes the transformer secondary voltage with transformer secondary short circuit in winding, thereby has duty-cycle loss.Equally, when load is light, if there is not pulsactor, output inductor does not participate in the former limit of transformer continuous current circuit, have only transformer leakage inductance to participate in the afterflow of transformer primary current, leakage inductance is generally less, has all discharged back buffer capacitor both end voltage at the transformer leakage inductance energy and has not still reached the input voltage size, then will cause Q
6Can not realize that ZVS is open-minded, add pulsactor after, that principle coexists is above-mentioned 2, the Q during mode 4 of middle explanation
1And Q
4Can not realize that ZCS opens unanimity.
5, switch mode 5[t
3, t
4] [corresponding to accompanying drawing 7]
After the energy of transformer leakage inductance and pulsactor has discharged, the former limit Q of transformer
2, Q
3Body diode D
2And D
3Zero current ends, and the former limit of transformer does not have current flowing, Q
1-Q
4The voltage that bears is half of electric capacity both end voltage.Though two all conductings of rectifier diode of secondary this moment, former secondary voltage is zero, does not have the duty-cycle loss problem.
6, switch mode 6[t
4, t
5] [corresponding to accompanying drawing 8]
Open Q constantly at t4
2, Q
3, Q
6, owing to there is leakage inductance L
sAnd pulsactor L, and at electric current hour pulsactor value is bigger, make Q
2, Q
3, Q
6For ZCS open-minded.Transformer is oppositely excitatory, winding voltage be last negative down just, the secondary electromagnetic induction also be last negative following just, D
R2Conducting, D
R1End because of bearing back-pressure.The current circuit on the former limit of transformer is: V
In2Positive pole-diode D
7-switching tube Q
2The former limit of-transformer winding N
1-transformer leakage inductance L
s-pulsactor L-switching tube Q
3-auxiliary switch Q
6-input power supply V
In2Negative pole.The secondary current loop is transformer secondary winding N
2Positive pole-rectifier diode D
R2-output inductor L-load-transformer secondary winding centre cap.The input power supply provides energy by converter to load, and converter begins second half cycling, and its working condition is similar to above-mentioned half period.
As seen from the above description, soft switch circuit of the present invention has following advantage:
(1) hard switching of the drive signal sequential of each brachium pontis switching tube of full-bridge and routine is similar in the circuit, promptly brachium pontis is opened shutoff simultaneously, does not need to control phase shifting angle; The brachium pontis of auxiliary switch and correspondence is open-minded simultaneously, and super previous angle is turn-offed, and has simplified the complexity of control circuit.
(2) utilize auxiliary switch, clamping capacitance, buffer capacitor and the transformer leakage inductance of inlet highway to realize Q in the circuit
1-Q
6The soft switch ZCS of all power switch pipes is open-minded, and ZVS turn-offs.
(3) in the circuit one-period, between the afterflow period, have only two mode to have duty-cycle loss, compare with conventional FB-ZVS and fundamentally significantly reduce duty-cycle loss at secondary.
(4) utilize pulsactor to seal in the former limit of transformer, can guarantee still can realize that the ZCS of power switch pipe opens with ZVS in the circuit turn-offs in the circuit underloading or when unloaded, when big electric current, pulsactor is saturated, and the inductance that is unlikely to former limit is too big and cause very big circulation loss.
Claims (3)
1. soft switch circuit of the present invention utilizes auxiliary network, transformer leakage inductance and pulsactor to realize that all power switch pipe ZCS open with ZVS and turn-offs.The circuit auxiliary network is by two IGBT switching tube Q
5, Q
6Diode D
7, D
8And buffer capacitor C forms.Q in the auxiliary network
5The C utmost point receive the input power supply positive pole, the E utmost point is received D
7Negative electrode, the anode of buffer capacitor, Q
6The E utmost point receive the input power supply negative electrode, the C utmost point receive D
8Anode, the negative electrode of buffer capacitor, D
7Anode receive D
8Negative electrode, the input power supply be divided into two equal-sized two part of V
In1=V
In2
2. according to claim 1, the Q in the full-bridge circuit in the circuit
1, Q
4Open shutoff simultaneously, Q
2, Q
3Open shutoff simultaneously, Q
5, Q
6Respectively with Q
1(Q
4), Q
2(Q
3) open-minded simultaneously, the leading Q of difference
1(Q
4), Q
2(Q
3) a time t
sTurn-off, the hard switching full-bridge circuit of drives signal and routine is similar, and drive circuit is simple.Q
1～Q
6Can both realize that ZCS opens with ZVS and turn-off.Duty-cycle loss only is present in two mode of one-period.
3. according to claim 1, novel soft switch circuit utilizes pulsactor L to widen the soft-switching range of circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101905799A CN102231600A (en) | 2011-07-08 | 2011-07-08 | Novel full-bridge soft switch circuit applied to arc welding inverter power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101905799A CN102231600A (en) | 2011-07-08 | 2011-07-08 | Novel full-bridge soft switch circuit applied to arc welding inverter power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102231600A true CN102231600A (en) | 2011-11-02 |
Family
ID=44844144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101905799A Pending CN102231600A (en) | 2011-07-08 | 2011-07-08 | Novel full-bridge soft switch circuit applied to arc welding inverter power supply |
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|---|---|
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199727A (en) * | 2013-04-17 | 2013-07-10 | 东南大学 | Zero current switching full-bridge type non-isolated photovoltaic grid-connected inverter |
| CN103795153A (en) * | 2012-10-26 | 2014-05-14 | 美国亚德诺半导体公司 | Isolated digital transmission with improved EMI immunity |
| CN104242719A (en) * | 2014-08-07 | 2014-12-24 | 东南大学 | Switching-loss-free full-bridge non-isolated photovoltaic grid-connected inverter and on-off control timing sequence |
| CN104270015A (en) * | 2014-09-09 | 2015-01-07 | 江苏大学 | Eight-switch non-isolated full-bridge photovoltaic grid-connected inverter and working method thereof |
| CN104901550A (en) * | 2015-06-10 | 2015-09-09 | 三峡大学 | Bidirectional full-bridge DC/DC converter based on variable inductor network |
| CN104935174A (en) * | 2015-06-10 | 2015-09-23 | 三峡大学 | Full bridge DC-DC converter including adjustable inductance network |
| CN105099249A (en) * | 2015-09-21 | 2015-11-25 | 南京航空航天大学 | High-reliability double-input inverter |
| CN106208783A (en) * | 2016-07-20 | 2016-12-07 | 广东双核电气有限公司 | Novel Soft Switching commutation system |
| WO2023165346A1 (en) * | 2022-03-01 | 2023-09-07 | 许真剑 | Full-bridge inverter soft switching circuit and control method |
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| US7173831B1 (en) * | 2005-09-23 | 2007-02-06 | Intel Corporation | Power converter having a primary side switching circuit |
| CN101599705A (en) * | 2008-06-02 | 2009-12-09 | 株式会社大亨 | Supply unit and arc component processing power source |
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2011
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US7173831B1 (en) * | 2005-09-23 | 2007-02-06 | Intel Corporation | Power converter having a primary side switching circuit |
| CN101599705A (en) * | 2008-06-02 | 2009-12-09 | 株式会社大亨 | Supply unit and arc component processing power source |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795153A (en) * | 2012-10-26 | 2014-05-14 | 美国亚德诺半导体公司 | Isolated digital transmission with improved EMI immunity |
| CN103795153B (en) * | 2012-10-26 | 2017-03-01 | 美国亚德诺半导体公司 | There is the isolation Digital Transmission of improved EMI vulnerability to jamming |
| US9583948B2 (en) | 2012-10-26 | 2017-02-28 | Analog Devices, Inc. | Isolated digital transmission with improved EMI immunity |
| CN103199727A (en) * | 2013-04-17 | 2013-07-10 | 东南大学 | Zero current switching full-bridge type non-isolated photovoltaic grid-connected inverter |
| CN104242719B (en) * | 2014-08-07 | 2016-11-09 | 东南大学 | The full-bridge non-isolated grid-connected inverter of type without switching loss and switch control time sequence |
| CN104242719A (en) * | 2014-08-07 | 2014-12-24 | 东南大学 | Switching-loss-free full-bridge non-isolated photovoltaic grid-connected inverter and on-off control timing sequence |
| CN104270015A (en) * | 2014-09-09 | 2015-01-07 | 江苏大学 | Eight-switch non-isolated full-bridge photovoltaic grid-connected inverter and working method thereof |
| CN104935174A (en) * | 2015-06-10 | 2015-09-23 | 三峡大学 | Full bridge DC-DC converter including adjustable inductance network |
| CN104901550A (en) * | 2015-06-10 | 2015-09-09 | 三峡大学 | Bidirectional full-bridge DC/DC converter based on variable inductor network |
| CN104901550B (en) * | 2015-06-10 | 2018-08-28 | 三峡大学 | A kind of bridge DC/DC converters of enjoying a double blessing based on variable inductance network |
| CN104935174B (en) * | 2015-06-10 | 2019-01-15 | 三峡大学 | A kind of full-bridge DC/DC converter containing tunable inductance network |
| CN105099249A (en) * | 2015-09-21 | 2015-11-25 | 南京航空航天大学 | High-reliability double-input inverter |
| CN105099249B (en) * | 2015-09-21 | 2018-05-04 | 南京航空航天大学 | High reliability dual input inverter |
| CN106208783A (en) * | 2016-07-20 | 2016-12-07 | 广东双核电气有限公司 | Novel Soft Switching commutation system |
| WO2023165346A1 (en) * | 2022-03-01 | 2023-09-07 | 许真剑 | Full-bridge inverter soft switching circuit and control method |
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Application publication date: 20111102 |