CN107769576A - A kind of three-level soft switch DC transfer circuit of primary side clamper - Google Patents
A kind of three-level soft switch DC transfer circuit of primary side clamper Download PDFInfo
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- CN107769576A CN107769576A CN201711242439.5A CN201711242439A CN107769576A CN 107769576 A CN107769576 A CN 107769576A CN 201711242439 A CN201711242439 A CN 201711242439A CN 107769576 A CN107769576 A CN 107769576A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention proposes a kind of three-level soft switch DC transfer circuit of primary side clamper, Sofe Switch is realized using three-level soft switch DC converting technology, circuit includes positive and negative direct voltage source, first, two, three, four switching tubes, the switching tube endoparasitic first, two, three, four anti-paralleled diodes, the first of the switching tube both ends parallel connection, two, three, four equivalent capacitys, first, two clamp diodes, first, two fly-wheel diodes, first, two output commutation diodes, capacitance, resonant inductance, transformer, outputting inductance, output capacitance, load；The present invention by each switching tube in the three-level soft switch DC transfer circuit of primary side clamper working condition at different moments control logic, reduce the volume and weight of power module internal converter, improve the switching frequency of switching tube, reduce switching loss, greatly improve the property indices of power supply.
Description
Technical field
The present invention relates to the technical field of Switching Power Supply, and in particular to a kind of three-level soft switch direct current of primary side clamper becomes
Change circuit.
Background technology
With the continuous development of switch power technology, people it is also proposed more stringent requirement, example to Switching Power Supply
Such as：Power factor, THD, EMI, efficiency etc., the technologies such as PFC (PFC), Sofe Switch are generated therewith.In three-phase
In high power switching power supply, the typically reachable 780~820V of the output of circuit, is typically now adopted after three-phase activity coefficient adjustment
With traditional phase whole-bridging circuit.However, the rated voltage of rear class DC converter switching tube to be selected it is very big, it is difficult to choose
Suitable power switch pipe, and in order to reduce the volume and weight of converter, it is necessary to switching frequency is improved, originally using power
The hard switching technology that device is realized can not meet to require.
The content of the invention
Based on above mentioned problem, the present invention proposes a kind of three-level soft switch DC transfer circuit of primary side clamper, uses
Three-level soft switch DC converting technology realizes Sofe Switch, reduces switching loss.
The present invention provides following technical scheme：
On the one hand, the invention provides a kind of three-level soft switch DC transfer circuit of primary side clamper, the circuit bag
Include：
Positive and negative direct voltage source, first, second, third and fourth switching tube, the switching tube endoparasitic first, second, third and fourth
Anti-paralleled diode, the switching tube both ends first, second, third and fourth equivalent capacity in parallel, first and second clamp diode, the
First, two fly-wheel diode, first and second output commutation diode, capacitance, resonant inductance, transformer, outputting inductance, output
Electric capacity, load；Described resonant inductance one end is connected between second, third anti-paralleled diode, and the other end connects the transformation
Device；The centre cap connection outputting inductance of the transformer.
Wherein, during the circuit work, at the t1-t2 moment, the second switch pipe no-voltage is open-minded, now first switch pipe
The voltage born is zero, transformer short-circuit；At the t2-t3 moment, t2 moment first switch pipe no-voltages are open-minded, and positive direct-current voltages source leads to
Cross first and second switching tube and be added to resonant inductance both ends；T3 moment, resonant inductance electric current rise to maximum and meet that secondary current exports
And charged to the reverse junction capacity and RC absorbing circuits of the second output commutation diode, the resonant inductance of primary side is posted with equivalent
Raw electric capacity carries out resonance.The t4 moment, when the reverse junction capacity of the second output commutation diode starts to charge up, the second output rectification
Diode is begun to shut off, main transformer both end voltage Vcs=Vin, and resonant inductance voltage is down to zero and started reversely, now the first clamp
Diode prepares the excess energy that conducting carrys out bleed off resonant inductance, and this stage at t4 moment terminates；T5 moment, the first clamp diode
Electric current be down to zero, zero-current switching；The t6 moment, first switch pipe zero voltage turn-off, after shut-off, the second output commutation diode
Naturally turn on, outputting inductance electric current is in short-circuit condition, resonance by first, second output commutation diode afterflow, transformer
Inductance and the energy of transformer primary side leakage inductance pass through second switch pipe and the first fly-wheel diode afterflow；T7 moment, second switch
Pipe zero voltage turn-off.
Wherein, export the clamp voltage of commutation diode and rated value has 2*dV/n pressure difference, dV=(VRc+Vd5+
Vds1)/n。
The present invention proposes a kind of three-level soft switch DC transfer circuit of primary side clamper, straight using three-level soft switch
Stream converter technique realizes Sofe Switch, and circuit includes positive and negative direct voltage source, first, second, third and fourth switching tube, in the switching tube
First, second, third and fourth parasitic anti-paralleled diode of portion, the switching tube both ends first, second, third and fourth equivalent capacity in parallel,
First and second clamp diode, first and second fly-wheel diode, first and second output commutation diode, capacitance, resonant inductance,
Transformer, outputting inductance, output capacitance, load；The present invention is by the three-level soft switch DC transfer circuit of primary side clamper
Each switching tube working condition at different moments control logic, reduce power module internal converter volume and weight,
The switching frequency of switching tube is improved, reduces switching loss, greatly improves the property indices of power supply.
Brief description of the drawings
Fig. 1 is phase whole-bridging circuit schematic diagram；
Fig. 2 is the three-level soft switch DC transfer circuit schematic diagram of the primary side clamper of the use of the present invention；
Fig. 3 is the circuit working timing figure of the present invention；
Fig. 4 be the present invention output diode Reverse recovery during waveform correlation figure.
Embodiment
Technical scheme in order to illustrate the embodiments of the present invention more clearly, it will use below required in embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other attached
Figure.
The present invention is under middle large-power occasions, because switch tube voltage stress is low, is easily achieved the advantages that Sofe Switch, phase shift
Full-bridge is widely used；
Such as accompanying drawing 1, converter realizes the ZVT (ZVS) of switching tube using Lr and C1~C4.Q1 and Q4 is advanced
Pipe, Q2 and Q3 are that hysteresis is managed, and Q1 and Q4 are turned off before Q2 and Q3 respectively, i.e. Q1 and Q4 are 180 ° of complementary conductings, Q2 and Q3
For 180 ° of complementary conductings；The conducting of advance pipe and hysteresis pipe differs a phase, i.e. phase shifting angle, by the size for adjusting phase shifting angle
To adjust output voltage.It is in order to which advance pipe is realized into ZVS switching process decouples with hysteresis pipe to be coupled electric capacity Css.
When advance pipe switchs, the junction capacity for lagging pipe is not involved in resonance, and lags the junction capacity of advance pipe when pipe switchs
It is not involved in resonance.Css capacity is larger, and in stable state, voltage maintains essentially in Vin/2 thereon.Sustained diode 5, D6 and connection
Junction capacity Css has clamping action, the former clamper advance pipe, the latter's clamper hysteresis pipe.D7 and D8 is clamp diode, clamper position
Put to clamp also to clamp in advance pipe and managed in hysteresis.From the point of view of its control mode, phase-shifting full-bridge can be very good to make stable state feelings really
The stress of condition lower switch pipe is maintained at Vin/2, and Q1, Q4 and Q2, Q3 complementary conducting respectively, and each switching tube is secondary to switching
Sequence does not limit, and is easy to software to realize.
Due to Css presence, the voltage stress of switching tube can be exceeded, so as to cause power module integrity problem, such as exists
Module starts moment, and because the voltage on Css is 0, therefore the voltage that may have Vin is all added on Q4.Opened in complementation
Pass pipe is in the passive transient process between active, because being coupled the unbalanced in zero load of electric capacity Css discharge and recharges when exchanging
When be easier to cause metal-oxide-semiconductor over-pressed.
Embodiments of the present invention provide a kind of three-level soft switch DC transfer circuit of primary side clamper, such as accompanying drawing 2
Shown, the circuit includes：
For the three-level soft switch DC transfer circuit schematic diagram of the primary side clamper of use, VC+ and VC- is respectively just in figure
Negative dc voltage source, Q1~Q4 are switching tubes, and D1~D4 is the endoparasitic anti-paralleled diode of switching tube, and C1~C4 is switch
Pipe both ends parallel equivalent electric capacity, D7~D8 are clamp diodes, and D9~D10 is fly-wheel diode, and D5~D6 is output rectification two
Pole pipe, Cb are capacitances, and Lr is resonant inductance, and T1 is transformer, and Lf is outputting inductance, and Cf is output capacitance, and R1 is load；
Resonant inductance Lr one end is connected between anti-paralleled diode D2, D3, and other end connection transformer T1, transformer T1 center is taken out
Head connection outputting inductance Lf.
Accompanying drawing 3 is circuit working timing figure, from top to bottom respectively switching tube Q1~Q4 driver' s timing waveform：GA、GB、
GC、GD；The voltage waveform VT1 at transformer T1 both ends；Primary side resonant inductance current waveform ILr and sustained diode 9, D10 electricity
Flow waveform；Clamp diode D7 and D8 current waveform ID7 and ID8；Export the voltage waveform at commutation diode D6 and D5 both ends.
During circuit work, specific works pattern and it is analyzed as follows：
T1-t2 moment, Q2 conductings, due to the Sofe Switch that resonant inductance and MOS both ends shunt capacitance are realized, so the electricity of Q2 zero
Press off logical, the voltage that now Q1 switching tubes are born is also zero, and secondary current is short-circuited still in freewheeling state, transformer.
The t2-t3 moment, t2 moment Q1 conductings, due to the effect of Sofe Switch, so Q1 no-voltages are open-minded, VC+ by Q1 and
Q2 is added to resonant inductance both ends, and resonant inductance electric current is in the linear rise stage.Due to necessarily wait until inductive current reversely and
During more than 1/n secondary currents, primary side could be to secondary transmission power, so the stage for waiting inductive current to rise is referred to as dutycycle
The loss stage.
T3 moment, resonant inductance electric current rise to maximum and meet secondary current output and reverse junction capacity and RC to D6
Absorbing circuit charges, and the resonant inductance of primary side carries out resonance with equivalent parasitic capacitance.The t4 moment, when D6 reverse junction capacity is opened
When beginning to charge, D6 is begun to shut off.Main transformer both end voltage Vcs=Vin, resonant inductance voltage are down to zero and started reversely, due to pair
Side only needs to provide load energy, therefore now clamp diode D7 prepares the excess energy that conducting carrys out bleed off resonant inductance,
This stage at t4 moment terminates.Primary side starts to secondary delivering power.
T4-t5, clamp stage and power output stage 1
T4 moment clamp diodes D7 is turned on, and returns bus by bleed off more than energy on resonant inductance, now transformer T1
Vin is clamped at capacitance Cb voltage sum.In order to carry out current limliting to clamp diode, resistance R2 is added herein.
At the t5 moment, D7 electric current ID7 is down to zero, D7 zero-current switchings (DCM)., can to make electric currents of the D7 before Q1 shut-offs be down to zero
To be ensured by adjusting R2 resistance values.T4-t5 primary sides to secondary be the power output stage.
T5-t6, power output stage 2
T6-t7, freewheeling period
T6 moment, Q1 pipes are begun to turn off, due to C1 presence, Q1 pipe zero voltage turn-offs.After the shut-off of Q1 pipes, output diode
D6 is turned on naturally, and outputting inductance electric current is in short-circuit condition by D5 and D6 afterflows, transformer.Voltage on Q1 shunt capacitances is very
VC+ is charged to soon, and now Q3 and Q4 respectively bears 1/2VC-, and sustained diode 9 also begins to nature conducting.Due to Q2 still in
Conducting state, so, the energy of resonant inductance Lr and transformer primary side leakage inductance passes through Q2 and D9 afterflows.
T7-t8, resonant stage (dead band)
The t7 moment, Q2 was begun to turn off, due to C2 presence, Q2 zero voltage turn-offs.C2, C3, C4 and Lr resonance, C2 chargings, electricity
Pressure rise, C3 and C4 electric discharges, voltage decline, and Lr electric current is gradually reduced.After C3 and C4 voltages are down to zero, Q3 and Q4 body two
Pole pipe D3 and D4 are turned on naturally, and electric capacity C3 and C4 both end voltage is close to zero, and offer bar is opened for next stage Q3 and Q4 no-voltage
Part.Now resonant inductance and transformer leakage inductance bear backward voltage VC-, Lr electric current and continue to reduce, and Q2 voltage is charged to VC
+.Still in freewheeling state, transformer continues to be short-circuited secondary.Due to the stage, all switching tubes of Q1~Q4 are all in shut-off shape
State, thus the stage also cry dead band.
Due to other period t8~t14, circuit works in negative half period, and operation principle is identical with positive half cycle, electric based on the above
The basic functional principle on road.
It is the basic functional principle of main circuit above, clamp circuit is given below two as important component therein
Waveform correlation during pole pipe Reverse recovery is to help analysis, such as accompanying drawing 4.
Clamp voltage and rated value for output diode have individual 2*dV/n pressure difference：
DV=(VRc+Vd5+Vds1)/n
Presence and clamp diode conducting due to leakage inductance need the time, at the beginning and end of clamp, it may appear that small point
Reach specified back-pressure after peak and of short duration vibration.Find out from figure, due to the presence of parasitic capacitance (including various Absorption Capacitances),
Diode reverse voltage slowly rises to high pressure, while highest back-pressure is clamped.
Therefore, its recovery characteristics is solved very well.Increased clamp diode works in discontinuous conduct mode simultaneously
(DCM) it is soft switching that, it, which turns off nature, and circuit integrity can be improved.
The present invention proposes a kind of three-level soft switch DC transfer circuit of primary side clamper, straight using three-level soft switch
Stream converter technique realizes Sofe Switch, and circuit includes positive and negative direct voltage source, first, second, third and fourth switching tube, in the switching tube
First, second, third and fourth parasitic anti-paralleled diode of portion, the switching tube both ends first, second, third and fourth equivalent capacity in parallel,
First and second clamp diode, first and second fly-wheel diode, first and second output commutation diode, capacitance, resonant inductance,
Transformer, outputting inductance, output capacitance, load；The present invention is by the three-level soft switch DC transfer circuit of primary side clamper
Each switching tube working condition at different moments control logic, reduce power module internal converter volume and weight,
The switching frequency of switching tube is improved, reduces switching loss, greatly improves the property indices of power supply.
The foregoing description of the disclosed embodiments, those skilled in the art are enable to realize or using the present invention.To this
A variety of modifications of a little embodiments will be apparent for a person skilled in the art, and generic principles defined herein can
Without departing from the spirit or scope of the present invention, to realize in other embodiments.
Therefore, the present invention is not intended to be limited to the embodiments shown herein, but meet with it is disclosed herein
Principle and the consistent most wide scope of features of novelty.
Claims (3)
1. a kind of three-level soft switch DC transfer circuit of primary side clamper, it is characterised in that the circuit includes：
Positive and negative direct voltage source, first, second, third and fourth switching tube, the switching tube endoparasitic first, second, third and fourth are anti-simultaneously
Di- pole pipe, the switching tube both ends first, second, third and fourth equivalent capacity in parallel, first and second clamp diode, first and second
Fly-wheel diode, first and second output commutation diode, capacitance, resonant inductance, transformer, outputting inductance, output capacitance,
Load；Described resonant inductance one end is connected between second, third anti-paralleled diode, and the other end connects the transformer；Institute
State the centre cap connection outputting inductance of transformer.
2. circuit according to claim 1, it is characterised in that：During the circuit work, at the t1-t2 moment, described second opens
Pass pipe no-voltage is open-minded, and the voltage that now first switch pipe is born is zero, transformer short-circuit；T2-t3 moment, t2 moment first open
Pass pipe no-voltage is open-minded, and positive direct-current voltages source is added to resonant inductance both ends by first and second switching tube；T3 moment, resonant inductance
Electric current rises to maximum and meets secondary current output and absorb reverse junction capacity from electricity to the second output commutation diode and RC
Road is charged, and the resonant inductance of primary side carries out resonance with equivalent parasitic capacitance.The t4 moment, when second output commutation diode it is anti-
When being started to charge up to junction capacity, the second output commutation diode is begun to shut off, main transformer both end voltage Vcs=Vin, resonant inductance electricity
Pressure drop is to zero and starts reversely, and now the first clamp diode prepares the excess energy that conducting carrys out bleed off resonant inductance, t4 moment
This stage terminates；T5 moment, the electric current of the first clamp diode are down to zero, zero-current switching；T6 moment, the electricity of first switch pipe zero
Pressure shut-off, after shut-off, the second output commutation diode turns on naturally, and outputting inductance electric current passes through first, second output rectification two
Pole pipe afterflow, transformer are in short-circuit condition, and the energy of resonant inductance and transformer primary side leakage inductance passes through second switch pipe and
One fly-wheel diode afterflow；T7 moment, second switch pipe zero voltage turn-off.
3. circuit according to claim 1, it is characterised in that：The clamp voltage and rated value for exporting commutation diode are present
2*dV/n pressure difference, dV=(VRc+Vd5+Vds1)/n.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711242439.5A CN107769576A (en) | 2017-11-30 | 2017-11-30 | A kind of three-level soft switch DC transfer circuit of primary side clamper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711242439.5A CN107769576A (en) | 2017-11-30 | 2017-11-30 | A kind of three-level soft switch DC transfer circuit of primary side clamper |
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| CN107769576A true CN107769576A (en) | 2018-03-06 |
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| CN201711242439.5A Pending CN107769576A (en) | 2017-11-30 | 2017-11-30 | A kind of three-level soft switch DC transfer circuit of primary side clamper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639170A (en) * | 2018-12-19 | 2019-04-16 | 合肥工业大学 | Auxiliary resonance pole active clamp three-level soft switch inverter circuit and modulator approach |
| CN110798086A (en) * | 2019-09-23 | 2020-02-14 | 漳州科华技术有限责任公司 | Three-level soft switching rectifying circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1286521A (en) * | 2000-10-19 | 2001-03-07 | 南京航空航天大学 | Three-level DC converter of zero-voltage switch with clamping diode |
| CN201213241Y (en) * | 2008-06-04 | 2009-03-25 | 中兴通讯股份有限公司 | Three-level DC converting circuit for zero-voltage switch |
| CN102255548A (en) * | 2011-07-29 | 2011-11-23 | 深圳麦格米特电气股份有限公司 | Three-level half-bridge soft switching DC (direct current) converting circuit and method for suppressing midpoint drifting |
-
2017
- 2017-11-30 CN CN201711242439.5A patent/CN107769576A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1286521A (en) * | 2000-10-19 | 2001-03-07 | 南京航空航天大学 | Three-level DC converter of zero-voltage switch with clamping diode |
| CN201213241Y (en) * | 2008-06-04 | 2009-03-25 | 中兴通讯股份有限公司 | Three-level DC converting circuit for zero-voltage switch |
| CN102255548A (en) * | 2011-07-29 | 2011-11-23 | 深圳麦格米特电气股份有限公司 | Three-level half-bridge soft switching DC (direct current) converting circuit and method for suppressing midpoint drifting |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639170A (en) * | 2018-12-19 | 2019-04-16 | 合肥工业大学 | Auxiliary resonance pole active clamp three-level soft switch inverter circuit and modulator approach |
| CN110798086A (en) * | 2019-09-23 | 2020-02-14 | 漳州科华技术有限责任公司 | Three-level soft switching rectifying circuit |
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