CN100416994C - Separation boost push-pull soft switch DC/AC converter - Google Patents
Separation boost push-pull soft switch DC/AC converter Download PDFInfo
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- CN100416994C CN100416994C CNB2006100301324A CN200610030132A CN100416994C CN 100416994 C CN100416994 C CN 100416994C CN B2006100301324 A CNB2006100301324 A CN B2006100301324A CN 200610030132 A CN200610030132 A CN 200610030132A CN 100416994 C CN100416994 C CN 100416994C
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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
- H02M3/337—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 in push-pull configuration
- H02M3/3376—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 in push-pull configuration with automatic control of output voltage or current
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- Engineering & Computer Science (AREA)
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- Dc-Dc Converters (AREA)
Abstract
An isolation boosting push-pull soft switch DC-DC converter including a voltage source Vin, an energy storage inductor Lin, main switches S1 and S2, exterior capacitors C1 and C2 parallel on the switches, assistant switches S1a and S2a, exterior capacitors C1a and C2a parallel on the assistant switches, resonance capacitor CG, a transformer for boosting Tr, rectified diodes DR1 and DR2, an output filter capacitor Cf and a load resistor Rld to constitute a circuit and the control logic of which is: the drive wave of the main switch S1 is a square wave with the duty ratio greater than 50%, the drive wave of S2 is 180 deg. phase-shift of that of S1, the assistant switches Sla and S2a are complementary and the drive waves are the complementary ones of S1 and S2, which realizes on-off of zero voltage of S1 and S2 and S1a and S2a so as to reduce loss and noises of switches.
Description
Technical field
The present invention relates to a kind of converter of technical field of electricity, be specifically related to a kind of separation boost push-pull soft switch DC/DC converter, can be applicable to the conversion occasion of DC-to-DC in low-voltages such as solar power system, fuel cell generation, the big current system.
Background technology
In low-voltages such as solar power system, fuel cell generation, big electric current electric power system, the DC/DC converter be realize that the energy dress changes, the crucial execution unit of transfer overvoltage electric current and power control.Consider the particularity that low-voltage such as fuel cell, big electric current are used, design to converter has following special this requirement: low-cost, low pollution, high efficiency, high power density, so the main circuit topology of converter must be simple, practical and reliable for satisfying above-mentioned requirements.
The conventional DC/DC translation circuit that boosts has a lot of forms, and the circuit that the typical case uses has two forward converters, push-pull circuit etc.Be applied in the main topology of fuel cell generation at present and be phase shifting control full-bridge zero-voltage contactor as shown in Figure 1.Q1～Q4 is semiconductor main switch (MOSFET or IGBT) among Fig. 1; D1～D4 is that endophyte diode .C1～C4 of switch Q1～Q4 is main switch Q1～Q4 parasitic capacitance or external capacitor, and Lr is resonant inductance (comprising transformer leakage inductance).Two power switchs of each brachium pontis become 180 ° of complementary conductings.It is phase shifting angle that the angle of flow of two brachium pontis differs a phase place.Regulate output voltage by the size of regulating phase shifting angle.Main waveform is seen shown in Figure 2.Q1, Q3 are a brachium pontis among Fig. 2, and Q2, Q4 are another brachium pontis.The size of utilizing the phase shifting angle between two brachium pontis to regulate output voltage.(resonance between the C1～C4) realizes that the no-voltage of switch turns on and off to utilize resonant inductance (Lr) and brachium pontis electric capacity simultaneously.The advantage of sort circuit is that switching voltage stress is low, the duty cycle adjustment wide ranges.The deficiency of this translation circuit is that control circuit complexity and low pressure transformation loop have the series connection of two switches, has increased conduction loss, makes transducer effciency descend.
Summary of the invention
The objective of the invention is to avoid the deficiencies in the prior art and propose a kind of high efficiency separation boost push-pull soft switch DC/DC converter that is applicable to low-voltage, big current applications.The present invention can reduce semiconductor switch loss and switch noise, thereby obtains higher circuit inversion efficiency and reduce the EMI noise.
The present invention is achieved through the following technical solutions: propose a kind of soft switch topology structure that is used for low-voltage, high-current, by semiconductor power switch and control logic thereof, suitably connect energy-storage travelling wave tube again, high efficiency realizes the electric energy that the boosts conversion of DC-to-DC.
Separation boost push-pull soft switch DC/DC converter using circuit of the present invention is realized, comprise voltage source vin, energy storage inductor Lin main switch S1 and S2, be connected in parallel on the external capacitor C1 of S1 drain electrode and source electrode, be connected in parallel on the external capacitor C2 of S2 drain electrode and source electrode, auxiliary switch S1a and S2a, the external capacitor C1a of S1a drain electrode in parallel and source electrode, be connected in parallel on the external capacitor C2a of S2a drain electrode and source electrode, resonant capacitance C
G, the transformer Tr of the usefulness of boosting, rectifier diode DR1, DR2, output filter capacitor Cf and load resistance R
LdThe annexation of circuit is: voltage source vin and energy storage inductor Lin are connected in series, and the end of energy storage inductor Lin connects the anode of voltage source vin, and the other end connects the centre cap on the former limit of transformer Tr.Main switch S1 source electrode connects the negative terminal of voltage source vin, and the drain electrode of main switch S1 connects an end on the former limit of transformer Tr.Same main switch S2 source electrode connects the negative terminal of voltage source vin, and the drain electrode of main switch S2 connects the other end on the former limit of transformer Tr.The source electrode of auxiliary switch S1a connects the drain electrode of main switch S1, and the source electrode of auxiliary switch S2a connects the drain electrode of main switch S2.The drain electrode of two auxiliary switch S1a and S2a link to each other and with resonant capacitance C
GAn end be connected.Resonant capacitance C
GAn end be connected with auxiliary switch S1a, S2a, the negative terminal of the other end and voltage source vin is connected.The anode of rectifier diode DR1, DR2 is connected with the two ends of transformer secondary, and negative electrode links together and constitutes the anode of output, and the centre cap of transformer secondary constitutes the negative terminal of output, output filter capacitor Cf and load resistance R
LdOne end connects the anode of output, and the other end connects the negative terminal of output.
Control logic of the present invention, promptly the time sequencing of switch is: 1. two main switch S1 and S2 conducting simultaneously Td/2 after the time main switch S2 turn-off; 2. through an of short duration Dead Time, T is after (1-d)/2 time in auxiliary switch S2a and main switch S1 conducting simultaneously, and auxiliary switch S2a turn-offs; 3. pass through another of short duration Dead Time, in the time of main switch S1 and S2 the conducting Td/2 time after, main switch S1 turn-offs; 4. again through an of short duration Dead Time, T is after (1-d)/2 time in auxiliary switch S1a conducting and main switch S2 conducting simultaneously, and auxiliary switch S1a turn-offs; 5. at last through behind the of short duration Dead Time, first process is got back in main switch S1 and S2 conducting simultaneously, so goes round and begins again.
Compared with prior art, advantage of the present invention: thus the high volume that has reduced passive component such as inductance, electric capacity and transformer etc. of switching frequency; All power switchs have realized that all no-voltage turns on and off, and the parasitic capacitance of the leakage inductance of transformer and parasitic capacitance, switching tube all participates in resonant process, have improved the efficient of switching tube and transformer.Owing to be booster circuit, reduced the electric current that is input to transformer, reduced the loss of transformer.Because each branch road only uses a switch in major loop, switch resistance and conduction loss have been reduced, improved the efficient of whole converter, this circuit is suitable for low-voltage, big current applications, specifically can be applied in the DC boosting of fuel cell power generation and solar power system.
Description of drawings
Fig. 1 is the schematic diagram of phase shifting control no-voltage full-bridge circuit of the prior art;
Each several part voltage, electric current sequential schematic diagram when Fig. 2 is prior art Fig. 1 circuit working;
Fig. 3 is an operation principle schematic diagram of the present invention;
Each several part voltage, electric current sequential schematic diagram when Fig. 4 is a circuit working of the present invention;
Fig. 5 is the control principle schematic diagram of circuit of the present invention.
Embodiment
Isolation boosting formula of the present invention is recommended soft switch DC/DC converter and is applicable to low-voltage, high-current circuit application scenarios such as solar power system, fuel cell generation, as shown in Figure 3, realize comprising voltage source vin in the circuit of the present invention, energy storage inductor Lin, main switch S1 and S2, be connected in parallel on the external capacitor C1 of S1 drain electrode and source electrode, be connected in parallel on the external capacitor C2 of S2 drain electrode and source electrode, auxiliary switch S1a and S2a, the external capacitor C1a of S1a drain electrode in parallel and source electrode, be connected in parallel on the external capacitor C2a of S2a drain electrode and source electrode, resonant capacitance C
G, the transformer Tr of the usefulness of boosting, rectifier diode DR1, DR2, output filter capacitor Cf and load resistance R
LdVoltage source vin and energy storage inductor Lin are connected in series, and the end of energy storage inductor Lin connects the anode of voltage source vin, and the other end connects the centre cap on the former limit of transformer Tr.Main switch S1 source electrode connects the negative terminal of voltage source vin, and the drain electrode of main switch S1 connects an end on the former limit of transformer Tr.Same main switch S2 source electrode connects the negative terminal of voltage source vin, and the drain electrode of main switch S2 connects the other end on the former limit of transformer Tr.The source electrode of auxiliary switch S1a connects the drain electrode of main switch S1, and the source electrode of auxiliary switch S2a connects the drain electrode of main switch S2.The drain electrode of two auxiliary switch S1a and S2a link to each other and with resonant capacitance C
GAn end be connected.Resonant capacitance C
GAn end be connected with auxiliary switch S1a, S2a, the negative terminal of the other end and voltage source vin is connected.The anode of rectifier diode DR1, DR2 is connected with the two ends of transformer secondary, and negative electrode links together and constitutes the anode of output, and the centre cap of transformer secondary constitutes the negative terminal of output, output filter capacitor Cf and load resistance R
LdOne end connects the anode of output, and the other end connects the negative terminal of output.
As shown in Figure 4, the control logic of circuit is: 1. two main switch S1 and S2 conducting simultaneously Td/2 after the time main switch S2 turn-off; 2. through an of short duration Dead Time, T is after (1-d)/2 time in auxiliary switch S2a and main switch S1 conducting simultaneously, and auxiliary switch S2a turn-offs; 3. pass through another of short duration Dead Time, in the time of main switch S1 and S2 the conducting Td/2 time after, main switch S1 turn-offs; 4. again through an of short duration Dead Time, T is after (1-d)/2 time in auxiliary switch S1a conducting and main switch S2 conducting simultaneously, and auxiliary switch S1a turn-offs; 5. at last through behind the of short duration Dead Time, first process is got back in main switch S1 and S2 conducting simultaneously, so goes round and begins again.
The used major-minor switch of Fig. 3 all is field-effect transistor (MOSFET) or IGBT, and its each several part work schedule is seen Fig. 4.During t0～t1, main switch S1 and S2 conducting simultaneously; The size of current equal direction that flows through the former limit of transformer is opposite, so rectifier diode ends; Electric current is 1/2i in two main switches
In, the time interval is Td/2; In this stage, input inductance Lin storage power.
At t1 constantly, because the existence of C2 makes S2 realize the no-voltage shutoff; The summation of charging current and discharging current is constant to be 1/2i
In, the time of its change of current
It is by C2 and C2a decision.
During t2～t3, then the voltage on the C2a reduces to zero, diode D2a conducting, and the energy that is stored among the leakage inductance L2d is given clamping capacitance C
GCharging, the time interval in this stage is T (1-d)/4.Charging current descends along with the increase of clamping capacitance.Auxiliary switch S2a must be in D2a conduction period conducting, thereby auxiliary switch S2a has realized that no-voltage is open-minded.
During t3～t4, along with C
GOn the reducing of charging current, will be reverse when charging current is decreased to zero, the time interval in this stage is T (1-d)/4.At t4 constantly, auxiliary switch S2a turn-offs, and is that no-voltage is turn-offed by its turn off process of C2a, and when S2a turn-offed, leakage inductance Ld2 made external capacitor C2 discharge and C2a charging in the mode of resonance.The electric current that discharges and recharges is a constant.The time interval in this stage can be very short, just finishes when the voltage on the main switch S2 reduces to zero.
During t5～t6, when external capacitor C2a reaches voltage V on the clamping capacitance
GThe time, diode D2 begins conducting, i
Ld2Descend.Main switch S2 must be in diode D2 conduction period conducting.
During t6～t7 (t0), the current reversal on the S2, when the electric current that flows through the former limit of transformer equated, diode ended, from and got back to first stage, so go round and begin again.
The theory diagram of control circuit is seen shown in Figure 5: the 501st, and integrated circuit (IC) chip, the 502nd, the isolation drive amplifying circuit, the 503rd, the former limit of transformer circuit, the 504th, output rectifier filter, the 505th, voltage sensor, the 506th, comparator, the 507th, voltage controller, the 508th, current sensor, the 509th, comparator, the 510th, current controller.
The square wave that two phase phasic differences of integrated circuit (IC) chip UC3895 (501) output are 180 ° becomes the drive signal of four road semiconductor switchs after through inverter separately, and this signal amplifies to be respectively applied for after (502) through isolation drive and drives main switch S1, S2 and auxiliary switch S1a, S2a.Voltage sensor (505) is converted to the direct voltage of 0～5V with VD, is sent in the voltage controller (507) after this voltage and voltage given value are compared, and the output of voltage controller is given as current controller.Current sensor is converted to the direct voltage of 0～5V with input current, and this voltage and current is given to be sent to current controller (510), the size of the output control output pulse width of current controller, thereby the size of regulating output voltage after relatively.
Claims (2)
1. separation boost push-pull soft switch DC/DC converter, it is characterized in that, comprise voltage source vin, energy storage inductor Lin, main switch S1 and S2, be connected in parallel on the external capacitor C1 of S1 drain electrode and source electrode, be connected in parallel on the external capacitor C2 of S2 drain electrode and source electrode, auxiliary switch S1a and S2a are connected in parallel on that S1a drains and the external capacitor C1a of source electrode, be connected in parallel on the external capacitor C2a of S2a drain electrode and source electrode, resonant capacitance C
G, the transformer Tr of the usefulness of boosting, rectifier diode DR1, DR2, output filter capacitor Cf and load resistance R
LdWherein: voltage source vin and energy storage inductor Lin are connected in series, the end of energy storage inductor Lin connects the anode of voltage source vin, the other end connects the centre cap on the former limit of transformer Tr, main switch S1 source electrode connects the negative terminal of voltage source vin, the drain electrode of main switch S1 connects an end on the former limit of transformer Tr, same main switch S2 source electrode connects the negative terminal of voltage source vin, the drain electrode of main switch S2 connects the other end on the former limit of transformer Tr, the source electrode of auxiliary switch S1a connects the drain electrode of main switch S1, the source electrode of auxiliary switch S2a connects the drain electrode of main switch S2, the drain electrode of two auxiliary switch S1a and S2a link to each other and with resonant capacitance C
GAn end be connected resonant capacitance C
GAn end be connected with auxiliary switch S1a, S2a, the negative terminal of the other end and voltage source vin is connected, the anode of rectifier diode DR1, DR2 is connected with the two ends of transformer Tr secondary, negative electrode links together and constitutes the anode of output, the centre cap of transformer Tr secondary constitutes the negative terminal of output, output filter capacitor Cf and load resistance R
LdOne end connects the anode of output, and the other end connects the negative terminal of output.
2. separation boost push-pull soft switch DC/DC converter according to claim 1 is characterized in that, described main switch S1 and S2, and auxiliary switch S1a and S2a all adopt field effect transistor M OSFET or IGBT.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100301324A CN100416994C (en) | 2006-08-17 | 2006-08-17 | Separation boost push-pull soft switch DC/AC converter |
| PCT/JP2007/066036 WO2008020629A1 (en) | 2006-08-17 | 2007-08-17 | Insulation boost type push-pull soft-switching dc/dc converter |
| JP2008529891A JPWO2008020629A1 (en) | 2006-08-17 | 2007-08-17 | Isolated step-up push-pull soft switching DC / DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100301324A CN100416994C (en) | 2006-08-17 | 2006-08-17 | Separation boost push-pull soft switch DC/AC converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1913309A CN1913309A (en) | 2007-02-14 |
| CN100416994C true CN100416994C (en) | 2008-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100301324A Expired - Fee Related CN100416994C (en) | 2006-08-17 | 2006-08-17 | Separation boost push-pull soft switch DC/AC converter |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2008020629A1 (en) |
| CN (1) | CN100416994C (en) |
| WO (1) | WO2008020629A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441680A (en) * | 2013-08-13 | 2013-12-11 | 陈仲 | Soft-switching full-bridge direct-current converter capable of reducing current-circulation loss |
| US11646670B2 (en) | 2021-02-05 | 2023-05-09 | Delta Electronics, Inc. | Power conversion module |
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| JP5012905B2 (en) * | 2007-11-20 | 2012-08-29 | 株式会社村田製作所 | Isolated DC-DC converter |
| EP2073366B1 (en) * | 2007-12-18 | 2016-04-27 | ABB Research Ltd. | dc-dc converter with resonant converter |
| RU2455746C2 (en) * | 2010-05-12 | 2012-07-10 | Закрытое акционерное общество "Связь инжиниринг" | Two-stroke bridge converter |
| CN102281047A (en) * | 2010-06-13 | 2011-12-14 | 深圳市英可瑞科技开发有限公司 | LLC (resonance inductor, magnetizing inductor and resonance capacitor) series resonance combined controller |
| JP5831275B2 (en) * | 2012-02-10 | 2015-12-09 | 日産自動車株式会社 | Power converter and driving method thereof |
| CN102624234B (en) * | 2012-04-20 | 2015-08-26 | 南京航空航天大学 | A kind of full-bridge three-port direct current converter and control method thereof |
| US9391532B2 (en) | 2013-03-14 | 2016-07-12 | Infineon Technologies Ag | System and method for a switched-mode power converter |
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| CN114301292B (en) * | 2021-12-17 | 2023-11-03 | 深圳英飞源技术有限公司 | Soft switching type bidirectional BUCK-BOOST converter |
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- 2007-08-17 JP JP2008529891A patent/JPWO2008020629A1/en active Pending
- 2007-08-17 WO PCT/JP2007/066036 patent/WO2008020629A1/en active Application Filing
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| US5245520A (en) * | 1991-10-10 | 1993-09-14 | Paul Imbertson | Asymmetrical duty cycle power converter |
| JPH1198836A (en) * | 1997-09-10 | 1999-04-09 | Korea Electrotechnol Inst | Circuit for zero voltage-zero current switching for full-bridge dc-dc converter which can reduce ripple in output current |
| US5949658A (en) * | 1997-12-01 | 1999-09-07 | Lucent Technologies, Inc. | Efficiency multiple output DC/DC converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441680A (en) * | 2013-08-13 | 2013-12-11 | 陈仲 | Soft-switching full-bridge direct-current converter capable of reducing current-circulation loss |
| CN103441680B (en) * | 2013-08-13 | 2015-12-23 | 陈仲 | A kind of soft switching full-bridge direct-current converter reducing circulation loss |
| US11646670B2 (en) | 2021-02-05 | 2023-05-09 | Delta Electronics, Inc. | Power conversion module |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2008020629A1 (en) | 2010-01-07 |
| WO2008020629A1 (en) | 2008-02-21 |
| CN1913309A (en) | 2007-02-14 |
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