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CN107370383A - A kind of modified phase-shifted full-bridge converter circuit - Google Patents

A kind of modified phase-shifted full-bridge converter circuit Download PDF

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Publication number
CN107370383A
CN107370383A CN201710469295.0A CN201710469295A CN107370383A CN 107370383 A CN107370383 A CN 107370383A CN 201710469295 A CN201710469295 A CN 201710469295A CN 107370383 A CN107370383 A CN 107370383A
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CN
China
Prior art keywords
transformer
diode
mosfet
anode
winding
Prior art date
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Pending
Application number
CN201710469295.0A
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Chinese (zh)
Inventor
李浩昱
赵雷
李振伟
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Harbin Institute of Technology Shenzhen
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Harbin Institute of Technology Shenzhen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Harbin Institute of Technology Shenzhen filed Critical Harbin Institute of Technology Shenzhen
Priority to CN201710469295.0A priority Critical patent/CN107370383A/en
Publication of CN107370383A publication Critical patent/CN107370383A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • H02M1/0048—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)
  • Dc-Dc Converters (AREA)

Abstract

本发明公开了一种改进型移相全桥变换器电路，包括第一至第四MOSFET，第一、第二变压器，第一、第二电容，第一至第四二极管，电阻，电感。本发明的电路可应用于各类移相全桥变换器，实现了开关管的宽软开关工作范围，同时实现了在整个开关周期内保持原边功率向二次侧传递的连续性，有效的减小了电感电流纹波和整流电压的振荡。

The invention discloses an improved phase-shifting full-bridge converter circuit, comprising first to fourth MOSFETs, first and second transformers, first and second capacitors, first to fourth diodes, resistors and inductors . The circuit of the present invention can be applied to various phase-shifting full-bridge converters, realizes the wide and soft switching range of the switching tube, and at the same time realizes the continuity of the primary side power transmission to the secondary side during the entire switching cycle, effectively Reduced inductor current ripple and rectified voltage oscillations.

Description

A kind of modified phase-shifted full-bridge converter circuit
Technical field
Patent of the present invention discloses a kind of modified phase-shifted full-bridge converter circuit, is related to electric and electronic technical field.
Background technology
Soft switch technique is one of important technology for enabling power inverter high frequency, and it is mainly characterized by making derailing switch Electric current (or voltage) in part is by the change of sinusoidal or quasi sine rule, and when electric current natural zero-crossing, making device shut-off, (or voltage is When zero, make the device open-minded) so as to reducing switching loss.Soft switch technique can not only solve the hard switching in hard-switching converter Loss problem, capacitive open problem, perceptual shut-off problem and diode reverse recovery problem, moreover it is possible to solve as caused by hard switching The problems such as EMI.
Traditional phase-shifted full-bridge converter is utilized between transformer leakage inductance or primary side series inductance and switching device junction capacity Resonance realize ZVT, because its circuit element quantity it is few, it is simple in construction be widely used, turn into Sofe Switch Technology is in the more successful example of DC converter China.However, traditional phase-shifted full-bridge converter still be there are problems that, The current stress and voltage stress of its switching device are as hard switching pwm converter.Its no-voltage opens condition by load electricity Stream influences, and condition is difficult to meet during underloading, and so as to cause system effectiveness to reduce, electromagnetic interference uprises.Posting in its switching process Raw vibration adds the voltage stress and output voltage ripple of device, and conduction loss also dramatically increases.
The content of the invention
Patent technical problem to be solved of the present invention is：To overcome the deficiencies in the prior art, there is provided Yi Zhonggai Enter type phase-shifted full-bridge converter circuit, realize the working range of the wide soft switch technique of all switching tubes, while realize Continuity of the primary side power to secondary side transmission is kept in whole switch periods, effectively reduces inductive current ripple and rectification The vibration of voltage.
Patent of the present invention uses following technical scheme to solve above-mentioned technical problem：
A kind of modified phase-shifted full-bridge converter circuit, including first to fourth MOSFET, first, second transformer, the First, the second electric capacity, first to fourth diode, resistance, inductance,
Drain electrode of the drain electrode of first MOSFET respectively with input anode, the 2nd MOSFET is connected, and first The drain electrode with the 3rd MOSFET, one end of the first secondary windings of the second transformer are connected MOSFET source electrode respectively, and the 3rd The one end of MOSFET source electrode respectively with input cathode, the first electric capacity is connected, and the 2nd MOSFET source electrode is respectively with the 4th MOSFET drain electrode, one end of second subprime winding of the second transformer are connected, the first secondary windings of the second transformer The other end of the other end and the second subprime winding of the second transformer, one end of the armature winding of the second transformer are connected, and The other end of the armature winding of two transformers is connected with one end of the armature winding of the first transformer, the primary of the first transformer The other end of winding is connected with the other end of the first electric capacity, the negative electrode of first diode and the negative electrode of the second diode, One end of inductance is connected, one end of the anode of the first diode and the first transformer secondary output winding, the negative electrode of the 3rd diode It is connected, the anode of the second diode is connected with the other end of the first transformer secondary output winding, the negative electrode of the 4th diode, the The anode of the anode of three diodes and the 4th diode, one end of the second electric capacity, one end of resistance are connected and are grounded, inductance The other end is connected with the other end of the second electric capacity, the other end of resistance.
Present invention technical characteristics compared with prior art are：
The switching tube of primary side can realize ZVT in a wide range.
Continuity of the primary side power to outlet side transmission is kept in whole switch periods, solves the change of tradition phase-shifting full-bridge The circulation problem of parallel operation, and the vibration of commutating voltage is effectively reduced, reduce the requirement to output inductor.
Brief description of the drawings
Fig. 1 is the circuit connection diagram of patent of the present invention, wherein：Q1、Q2、Q3、Q4Respectively first to fourth MOSFET, Caux、C0Respectively first, second electric capacity, Tm、TauxRespectively first, second transformer, npFor the first transformer Armature winding, nsFor the secondary windings of the first transformer, m3For the armature winding of the second transformer, m1For the of the second transformer One secondary windings, m2For the second subprime winding of the second transformer, LlkFor TmLeakage inductance, LmFor TauxMagnetizing inductance, TauxAnd Tm No-load voltage ratio be m respectively1:m2:m3=1:1:m(m>And n 1)p:ns=1:N, D1、D2、D3、D4Respectively first to fourth diode, R For resistance, L0For inductance.
Fig. 2 is the key operation waveforms schematic diagram of the phase-shifted full-bridge converter circuit of the present invention.
Fig. 3~8 are the equivalent circuit structure schematic diagrames of the phase-shifted full-bridge converter of the present invention.
Embodiment
The embodiment of patent of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein Same or similar label represents same or similar element or the element with same or like function from beginning to end.Lead to below It is exemplary to cross the embodiment being described with reference to the drawings, and is only used for explaining patent of the present invention, and can not be construed to the present invention The limitation of patent.The modification that all Spirit Essences according to main technical schemes of the present invention are done, it should all cover the guarantor in the present invention Within the scope of shield.
The technical scheme of patent of the present invention is described in further detail below in conjunction with the accompanying drawings：
A kind of modified phase-shifted full-bridge converter circuit, including first to fourth MOSFET, first, second transformer, the First, the second electric capacity, first to fourth diode, resistance, inductance,
Drain electrode of the drain electrode of first MOSFET respectively with input anode, the 2nd MOSFET is connected, and first The drain electrode with the 3rd MOSFET, one end of the first secondary windings of the second transformer are connected MOSFET source electrode respectively, and the 3rd The one end of MOSFET source electrode respectively with input cathode, the first electric capacity is connected, and the 2nd MOSFET source electrode is respectively with the 4th MOSFET drain electrode, one end of second subprime winding of the second transformer are connected, the first secondary windings of the second transformer The other end of the other end and the second subprime winding of the second transformer, one end of the armature winding of the second transformer are connected, and The other end of the armature winding of two transformers is connected with one end of the armature winding of the first transformer, the primary of the first transformer The other end of winding is connected with the other end of the first electric capacity, the negative electrode of first diode and the negative electrode of the second diode, One end of inductance is connected, one end of the anode of the first diode and the first transformer secondary output winding, the negative electrode of the 3rd diode It is connected, the anode of the second diode is connected with the other end of the first transformer secondary output winding, the negative electrode of the 4th diode, the The anode of the anode of three diodes and the 4th diode, one end of the second electric capacity, one end of resistance are connected and are grounded, inductance The other end is connected with the other end of the second electric capacity, the other end of resistance.
It is below main circuit structure with accompanying drawing 1, with reference to the concrete operating principle of the narration present invention of accompanying drawing 2~8.By accompanying drawing 2 Understand that whole converter there are 12 kinds of switch mode in a switch periods, be [t respectively0~t1]、[t1~t2]、[t2~t3]、[t3 ~t4]、[t4~t5]、[t5~t6]、[t6~t7]、[t7~t8]、[t8~t9]、[t9~t10]、[t10~t11]、[t11~t12] (see accompanying drawing 2), wherein, [t0~t6] it is first half cycle, [t6~t12] it is the later half cycle.Below to the work feelings of each switch mode Condition is made a concrete analysis of.
Before analysis, make the following assumptions：1) all devices are ideal component；2) capacitance C1、C2Regarding amplitude as is 0.5VinConstant pressure source；3) four MOSFET junction capacity is Coss；4) T is ignoredmLeakage inductance LlkAnd TauxMagnetizing inductance Lm； 5) output inductor L0Regard constant-current source as.
Switch [the t of mode 10~t1]
Q1、Q2、D1-D4Conducting.Transformer TauxArmature winding LmOn voltage be 0, iLmReach positive maximum+Im.Transformer Tm The voltage at armature winding both ends be 0.5Vin, the electric current flowed through is nI0, commutating voltage 0.5nVin。
Switch [the t of mode 21~t2]
In t1Moment, Q2Shut-off.Q2、Q4Junction capacity pass through constant-current source ileaLinear discharge.Advanced arm voltage vleaFrom VinDrop to Zero, while vpFrom 0.5VinDrop to 0.5mVin, transformer TauxMagnetizing inductance LmThe voltage at both ends is started from scratch decline.
Switch [the t of mode 32~t3]
In t2Moment, vleaDrop to zero, Q4Parasitic diode forward bias, Q4No-voltage turns on.vpAnd vrecRemain respectively 0.5mVinAnd 0.5nmVin.Therefore, within the duration of mode 3, primary side power is kept to secondary side transmission.LmThe electricity at both ends Pressure is maintained at-Vin, iLmFrom+ImDrop to-Im。
Switch [the t of mode 43~t4]
In t3Moment, Q1Shut-off.Now, iLmRise to reverse maximum-Im.Output inductor is equivalent to arrive primary side, Q1、Q3 Junction capacity pass through constant-current source ilagLinear discharge.vlag、vpBegin to decline.
Switch [the t of mode 54~t5]
In t4Moment, vpDrop to zero, lagging leg mid-point voltage vlagFor Vin/ (1+m), rectification side Voltage Drop are zero, all whole Stream diode simultaneously turns on.Transformer TmArmature winding and the voltage at secondary windings both ends be zero.Primary side junction capacity with Resonance occurs for leakage inductance.
Switch [the t of mode 65~t6]
In t5Moment, vlagDrop to zero.Q3Body diode conducting, Q3Being capable of no-voltage conducting.Commutation diode is held on, vABRemain zero.LlkThe voltage at both ends is -0.5Vin, make ipLinear decline.In t6Moment, ipReach-nI0, while D1、D4Close It is disconnected, D2、D3It is held on, LmThe voltage at both ends is zero, iLmReach reverse maximum.
Later half cycle [t6~t12] operation principle and first half cycle [t0~t6] essentially identical, simply electric current, voltage negative side To change, therefore no longer state more.
As seen from the above description, modified phase-shifted full-bridge converter proposed by the present invention has the following advantages that：
The switching tube of primary side can realize ZVT in a wide range.
During the advanced arm change of current, commutation diode conducting state is constant, and rectification side voltage linear rises, no-voltage vibration； During the lagging leg change of current, rectification side voltage very little, voltage oscillation restrained effectively.
Primary side power is kept continuously to outlet side transmission, to solve the conversion of tradition phase-shifting full-bridge in whole switch periods The circulation problem of device, the vibration of commutating voltage is effectively reduced, reduce the requirement to output inductor.

Claims (2)

1.一种改进型移相全桥变换器电路，其特征在于：包括第一至第四MOSFET，第一、第二变压器，第一、第二电容，第一至第四二极管，电阻，电感，其中，所述第一MOSFET的漏极分别与输入端正极、第二MOSFET的漏极相连接，第一MOSFET的源极分别与第三MOSFET的漏极、第二变压器的第一次级绕组的一端相连接，第三MOSFET的源极分别与输入端负极、第一电容的一端相连接，第二MOSFET的源极分别与第四MOSFET的漏极、第二变压器的第二次级绕组的一端相连接，第二变压器的第一次级绕组的另一端与第二变压器的第二次级绕组的另一端、第二变压器的初级绕组的一端相连接，第二变压器的初级绕组的另一端与第一变压器的初级绕组的一端相连接，第一变压器的初级绕组的另一端与第一电容的另一端相连接，所述第一二极管的阴极与第二二极管的阴极、电感的一端相连接，第一二极管的阳极与第一变压器次级绕组的一端、第三二极管的阴极相连接，第二二极管的阳极与第一变压器次级绕组的另一端、第四二极管的阴极相连接，第三二极管的阳极与第四二极管的阳极、第二电容的一端、电阻的一端相连接并接地，电感的另一端与第二电容的另一端、电阻的另一端相连接。1. An improved phase-shifting full-bridge converter circuit, characterized in that: comprise first to fourth MOSFETs, first and second transformers, first and second capacitors, first to fourth diodes, resistors , an inductor, wherein the drains of the first MOSFET are respectively connected to the anode of the input terminal and the drain of the second MOSFET, the sources of the first MOSFET are respectively connected to the drain of the third MOSFET, the first time of the second transformer One end of the primary winding is connected, the source of the third MOSFET is respectively connected to the negative pole of the input terminal and one end of the first capacitor, the source of the second MOSFET is respectively connected to the drain of the fourth MOSFET, and the second secondary of the second transformer One end of the winding is connected, the other end of the first secondary winding of the second transformer is connected with the other end of the second secondary winding of the second transformer and one end of the primary winding of the second transformer, and the primary winding of the second transformer The other end is connected to one end of the primary winding of the first transformer, the other end of the primary winding of the first transformer is connected to the other end of the first capacitor, the cathode of the first diode is connected to the cathode of the second diode , one end of the inductance is connected, the anode of the first diode is connected with one end of the secondary winding of the first transformer, and the cathode of the third diode is connected, the anode of the second diode is connected with the other end of the secondary winding of the first transformer One end is connected to the cathode of the fourth diode, the anode of the third diode is connected to the anode of the fourth diode, one end of the second capacitor, and one end of the resistor is connected to ground, and the other end of the inductor is connected to the second capacitor The other end of the resistor is connected to the other end of the resistor. 2.如权利要求1所述的一种改进型移相全桥变换器电路，其特征在于：引入至少一个变压器，在整个开关周期内，其端口电压非零，以保持原边功率向二次侧传递的连续性。2. A kind of improved phase-shifting full-bridge converter circuit as claimed in claim 1, it is characterized in that: introduce at least one transformer, in the whole switching period, its terminal voltage is non-zero, to keep primary side power to secondary Continuity of side transmission.
CN201710469295.0A 2017-06-20 2017-06-20 A kind of modified phase-shifted full-bridge converter circuit Pending CN107370383A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710469295.0A CN107370383A (en) 2017-06-20 2017-06-20 A kind of modified phase-shifted full-bridge converter circuit

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008511284A (en) * 2004-08-24 2008-04-10 アドバンスト・エナジー・インダストリーズ・インコーポレイテッド Soft switching interleaved power converter
CN101411049A (en) * 2006-03-03 2009-04-15 先进能源工业公司 Interleaved soft switching bridge power converter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008511284A (en) * 2004-08-24 2008-04-10 アドバンスト・エナジー・インダストリーズ・インコーポレイテッド Soft switching interleaved power converter
CN101411049A (en) * 2006-03-03 2009-04-15 先进能源工业公司 Interleaved soft switching bridge power converter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
陈仲等: "ZVS 全桥变换器辅助网络技术的比较研究", 《电工技术学报》 *

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