CN111682750A - 一种副边并联lcd实现正反激能量传输的正激变换器 - Google Patents

一种副边并联lcd实现正反激能量传输的正激变换器 Download PDF

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CN111682750A
CN111682750A CN202010491546.7A CN202010491546A CN111682750A CN 111682750 A CN111682750 A CN 111682750A CN 202010491546 A CN202010491546 A CN 202010491546A CN 111682750 A CN111682750 A CN 111682750A
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forward converter
secondary side
inductor
capacitor
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CN111682750B (zh
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刘树林
杨波
杨军
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Shenzhen Yuntian Digital Energy Co ltd
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Xi'an Modaxin Electronic Technology Co ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/22Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28Conversion 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
    • H02M3/325Conversion 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
    • H02M3/335Conversion 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
    • H02M3/33538Conversion 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 of the forward type
    • H02M3/33546Conversion 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 of the forward type with automatic control of the output voltage or current
    • H02M3/33553Conversion 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 of the forward type with automatic control of the output voltage or current with galvanic isolation between input and output of both the power stage and the feedback loop
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/22Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28Conversion 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
    • H02M3/325Conversion 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
    • H02M3/335Conversion 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
    • H02M3/33538Conversion 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 of the forward type
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/0048Circuits or arrangements for reducing losses
    • H02M1/0051Diode reverse recovery losses
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/0048Circuits or arrangements for reducing losses
    • H02M1/0054Transistor switching losses
    • H02M1/0058Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/08Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/083Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the ignition at the zero crossing of the voltage or the current
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/32Means for protecting converters other than automatic disconnection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/22Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28Conversion 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
    • H02M3/325Conversion 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
    • H02M3/335Conversion 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/0048Circuits or arrangements for reducing losses
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/0048Circuits or arrangements for reducing losses
    • H02M1/0054Transistor switching losses
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/40Means for preventing magnetic saturation
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies 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

本发明公开了一种副边并联LCD实现正反激能量传输的正激变换器,包括正激变换器主电路以及能量转移与传输电路,所述正激变换器主电路包括高频变压器T、开关管S、二极管D1、二极管D2、电感L1和电容C1,所述能量转移与传输电路包括二极管D3、电容C2和电感L2。本发明电路结构简单,可靠性高,不仅实现了励磁能量转移到负载侧,还能传输正激能量,提高了能量传输效率,还可实现开关管的软关断,并消除二极管D1、D2的反向恢复问题,进一步减小开关管和二极管损耗,提升整体效率。

Description

一种副边并联LCD实现正反激能量传输的正激变换器
技术领域
本发明属于开关电源技术领域,具体涉及一种副边并联LCD实现正反激能量传输的正激变换器。
背景技术
在众多的隔离型开关电源变换拓扑中,相对于反激变换器,正激变换器的功率大小并不受限于变压器储存能量的能力;相对于半桥、全桥变换器,正激变换器而言,其所用的元器件更少,电路更简单,成本更低廉,可靠性更高。
并且,由于正激变换器电路具有结构相对简单、成本较低、输入输出隔离、工作可靠性高等诸多优点,更适合应用在中小功率电能变换场合,并受到业界高度关注。但是,对于对于单管正激变换器而言,其工作在正向激磁状态下,其高频变压器磁芯单向磁化,本身没有磁复位功能,致使其极有可能引起磁芯饱和等问题。磁饱和的结果将导致流过开关管的电流猛增,甚至损坏开关管,上述问题均在很大程度上限制了正激变换器的推广,所以必须添加专门的磁复位电路或者能量转移电路来避免磁芯饱和。
其中,磁复位电路是每个周期的开关关断时间内将励磁能量进行转移,可以消耗在其他器件上或者返回到输入电源或传输到负载端。主要分成三种方案。方案一、在输入端接入复位绕组,使能量返回输入电源;方案二、变压器原边侧连接RCD、LCD等复位电路,使能量消耗掉或者返回到输入端;方案三、副边采取复位措施,可将能量转移到输出端。
但是,传统的RCD钳位电路比较简单,其不足是将励磁能量消耗在箝位电阻中,使***的整体效率难以提高;有源钳位技术实现磁复位是一种性能优良的方法,但其增加了变换器电路的复杂性、设计难度与成本;磁复位绕组复位方法技术成熟可靠,励磁能量可返回到输入电源中,但是磁复位绕组增加了变压器结构的复杂度,并增加了功率开关管的电压应力。
现有的副边复位办法:要么需要增加复位绕组或电路复杂,增加了变压器或电路的设计和制造难度及成本;要么实现能量转移需要通过较多的二极管,增加了电路损耗;要么会影响正激电感的工作模式或其它电气性能指标,不利于大功率传输。因此,磁复位的相关问题是本领域技术人员重点研究的技术方案一直,以解决磁复位带来的各种问题。
发明内容
本发明所要解决的技术问题在于针对上述现有技术中的不足,提供一种副边并联LCD实现正反激能量传输的正激变换器。解决解决现有磁复位电路励磁能量利用率低、电路组成复杂、损耗大、效率低的问题。
为解决上述技术问题,本发明采用的技术方案是:一种副边并联LCD实现正反激能量传输的正激变换器,包括正激变换器主电路(1)以及与正激变换器主电路(1)连接的能量转移与传输电路(2),所述正激变换器主电路(1)包括高频变压器T、开关管S、二极管D1、二极管D2、电感L1和电容C1,所述高频变压器T原边的同名端为正激变换器主电路(1)的正极电压输入端IN+且与外部电源的正极输出端连接,所述高频变压器T原边的异名端与开关管S的漏极连接,所述开关管S的源极为正激变换器主电路(1)的负极电压输入端IN-且与外部电源的负极输出端连接,所述开关管S的栅极与外部控制器的输出端连接,所述高频变压器T副边的同名端与二极管D1的阳极连接,所述二极管D1的阴极与二极管D2的阴极和电感L1的一端连接,所述电感L1的另一端与电容C1的一端连接且为正激变换器主电路(1)的正极电压输出端OUT+,所述高频变压器T副边的异名端与二极管D2的阳极和电容C1的另一端连接且为正激变换器主电路(1)的负极电压输出端OUT-,所述正激变换器主电路(1)的负极电压输出端OUT-接地;所述能量转移与传输电路(2)包括二极管D3、电容C2和电感L2,所述二极管D3的阳极与二极管D2的阳极连接,所述二极管D3的阴极与电容C2的一端连接,所述电容C2的另一端与二极管D1的阳极连接,所述电感L2的一端与二极管D3的阴极连接,其另一端与正激变换器主电路(1)的正极电压输出端OUT+连接。
其中,较佳方案是:所述二极管D1、D2为快恢复二极管。
其中,较佳方案是:所述开关管S为全控型功率半导体器件。
其中,较佳方案是:所述副边并联LCD实现正反激能量传输的正激变换器的电容C2根据第一选取步骤选取,其中,所述第一选取步骤的步骤包括:
步骤101、选取励磁储能电容C2的容值C2
步骤102、结合变换器输入电压Vi,变压器的匝比n,计算电容C2的耐压值VC2,Ton
步骤103、选取容值为C2且耐压值大于VC2,Ton的电容作为电容C2。
其中,较佳方案是:所述副边并联LCD实现正反激能量传输的正激变换器的L2根据第二选取步骤选取,其中,所述第二选取步骤的步骤包括:
步骤201、确定电感L2的电感值L2的取值范围;
步骤202、确定电感L2的电流;
步骤203、根据步骤201、步骤202选取满足电感L2。
其中,较佳方案是:所述副边并联LCD实现正反激能量传输的正激变换器的二极管D3根据第三选取步骤选取,其中,所述第三选取步骤的步骤包括:
步骤301、计算流过二极管D3的最大电流ID3,max
步骤302、计算二极管D2的耐压值VD3,max
步骤303、根据步骤301、步骤302选取二极管D3。
本发明与现有技术相比具有以下优点:
1、实现励磁能量转移到负载侧,提高了变压器励磁能量的利用率,提升了变换器的整体效率;
2、本发明的工作稳定性和可靠性高,磁复位回路结构简单,电路简单,功耗低,能量传输效率高,便于推广使用;
3、二极管D1、D2不存在反向恢复问题,减小了二极管损耗,可进一步提高变换器效率;
4、开关管可实现低电压关断,甚至零电压关断,降低开关损耗;
5、本发明设计的副边并联LCD实现正反激能量传输的正激变换器,相对辅助绕组复位,降低了变压器的设计难度;
6、L2更容易工作于CCM,辅路比主路提供的功率更大且无二极管导通损耗,有助于实现大功率输出;
7、本发明与现有大多数副边磁复位正激变换器相比较而言,可使正激电感工作于连续导电模式,相对传统的正激变换器而言,可应用于更大功率场合;
8、本发明的能量转移与传输电路,还能传输正激能量,适合大功率应用;
9、在开关电源中使用本发明后,开关电源的工作安全性和可靠性更高,能量转移与传输电路能够使能量利用率提高,可广泛应用于计算机、医疗通信、工业控制、航天设备等领域,因此本发明有较高的推广应用价值。
综上所述,本发明电路结构简单,实现方便且成本低,工作模式简单,工作稳定性和可靠性高,使用寿命长,功耗低,变压器利用率高,能量传输效率高,能够提高开关电源的工作安全性和可靠性,实用性强,推广应用价值高。
下面通过附图和实施例,对本发明的技术方案做进一步的详细描述。
附图说明
图1为本发明副边并联LCD实现正反激能量传输的正激变换器的电路原理图。
附图标记说明:
1—正激变换器主电路;2—能量转移与传输电路。
具体实施方式
如图1所示,本发明的副边并联LCD实现正反激能量传输的正激变换器,包括正激变换器主电路1、以及与正激变换器主电路1连接的能量转移与传输电路2,所述正激变换器主电路1包括高频变压器T、开关管S、二极管D1、二极管D2、电感L1和电容C1,所述高频变压器T原边的同名端为正激变换器主电路1的正极电压输入端IN+且与外部电源的正极输出端连接,所述高频变压器T原边的异名端与开关管S的漏极连接,所述开关管S的源极为正激变换器主电路1的负极电压输入端IN-且与外部电源的负极输出端连接,所述开关管S的栅极与外部控制器的输出端连接,所述高频变压器T副边的同名端与二极管D1的阳极连接,所述二极管D1的阴极与二极管D2的阴极和电感L1的一端连接,所述电感L1的另一端与电容C1的一端连接且为正激变换器主电路1的正极电压输出端OUT+,所述高频变压器T副边的异名端与二极管D2的阳极和电容C1的另一端连接且为正激变换器主电路1的负极电压输出端OUT-,所述正激变换器主电路1的负极电压输出端OUT-接地;所述能量转移与传输电路2包括二极管D3、电容C2和电感L2,所述二极管D3的阳极与二极管D2的阳极连接,所述二极管D3的阴极与电容C2的一端连接,所述电容C2的另一端与二极管D1的阳极连接,所述电感L2的一端与二极管D3的阴极连接,其另一端与正激变换器主电路1的正极电压输出端OUT+连接。
具体实施时,负载RL接在正激变换器主电路1的正极电压输出端OUT+与负极电压输出端OUT-之间。所述正激变换器主电路1中,电感L1和电容C1均用于滤波。
本实施例中,所述二极管D1为整流二极管,所述二极管D2为快恢复二极管。二极管D2用于续流。
本实施例中,所述开关管S为NMOS开关管。
本实施例的工作原理为:
在对本实施例的工作原理进行分析前,假设正激电感L1工作于DCM,辅助电感L2及变压器副边电感Lw2工作于CCM。下面分成开关管关断期间和导通期间来分析本实施例的工作原理。为了便于介绍原理,约定:对于电容C2,假定其电压左负右正为正向电压,左正右负为反向电压;对于副边绕组w2,假定其电流从下到上为正向电流,从上到下为反向电流。
1、开关管S关断期间的工作原理
假设开关关断时刻前,C2反向电压上升到最大值,电感L1、L2及Lw2电流上升到最大值。D1导通,D2、D3关断。
第一阶段:开关管低电压关断
在开关管从导通过渡到关断的过程中,励磁电流+副边反射电流为开关管寄生电容充电,变压器原、副边电压减小,当副边电压减小到等于C2的反向电压值时,此阶段结束。此阶段,开关管承受电压为Vi-nVC2(Vi输入电压,VC2为C2反向最大电压,n为变压器变比),所以,开关管承受的电压要比Vi小很多,实现了低电压关断(在特定参数下,还可实现零电压关断。)。此阶段,D1维持导通,D2、D3关断。
第二阶段:电容C2释放反向储能
副边电压减小到等于C2反向电压后,D3导通,L2开始续流,C2开始释放反向储能。此时D1维持导通,C2的反向储能通过两条回路释放:一条为电容C2经过D1、L1、RL、D3释放能量,这使得二极管D1不会立刻关断,但D2仍然处于关断状态;另一条为C2经过W2、D3释放能量。当C2放电到反向电压下降为零时,变压器原、副边电压同时也减小到零,D3仍维持导通,C2的反向储能释放完毕,此阶段结束。此阶段,C2的反向电压降到零后,D1与D2自然换流,因此,D1实现零电压、零电流关断,而D2零电压、零电流导通。
第三阶段:电容C2正向储能(L1、L2同时续流)
电容C2的反向电压值下降到零后,D3维持导通,L2继续保持续流,变压器副边绕组的反向电流为电容C2正向充电,其正向电压从零开始增加。在此过程中,D2导通,电感L1续流,直至电感L1电流下降为零,此阶段结束。
第四阶段:电容C2正向储能(仅L2续流)
电感L1电流下降为零后,D3仍维持导通,电感L2继续通过D3续流并线性下降。变压器副边绕组的反向电流继续下降,并继续给电容C2充电。直至下一个开关导通周期到来,L2电流下降至最小值,此时,副边绕组的反向电流也下降到最小值,C2的正向电压达到最大值,此阶段结束。
2、开关管S导通期间的工作原理
第一阶段:C2正向储能释放
开关管导通后,输入电压Vi施加在变压器原边绕组两端,耦合到二次绕组w2的电压上正下负,D1导通,正激能量通过两条支路向负载转移,其一,通过D1、L1向负载转移能量,L1电流线性上升;其二,经过C2、L2向负载提供能量,L2电流曲线上升。在此过程中,C2励磁储能从最大值开始释放,C2正向电压逐渐下降,直至电容C2正向电压下降为零,此过程结束。
第二阶段:C2反向储能
电容C2正向电压下降为零后,D1仍维持导通,L1电流继续线性上升。C2从零开始反向充电,L2电流继续曲线上升,为了实现L2支路传输大功率(可降低二极管损耗),L2电流在导通期间一直上升。直至开关关断时刻到来,L1、L2电流均达到最大值,C2两端电压达到反向最大,为实现低电压关断做好准备,此过程结束。
在本实施例中,所述电容C2根据第一选取步骤选取,其中,所述第一选取步骤的步骤包括:
步骤101、根据公式
Figure BDA0002521254040000081
选取励磁储能电容C2的容值C2
步骤102、根据公式(A1)计算电容C2的耐压值VC2,Ton
Figure BDA0002521254040000082
其中,Vi为正激变换器主电路1输入电压,d为开关管S的占空比,n为高频变压器T的一次绕组与二次绕组的匝数比,Lm为高频变压器T的一次绕组的励磁电感量,f为正激变换器主电路1的工作频率,λ一般取0.8≤λ≤1。
步骤103、选取容值为C2且耐压值大于VC2,Ton的电容作为电容C2;
在本实施例中,所述电感L1、L2根据第二选取步骤选取,其中,所述第二选取步骤的步骤包括:
步骤201、根据公式(A2)确定电感L2的电感值L2的取值范围;
L2=min(L2,min1,L2,min2) (A2)
其中,电感L2最小值L2,min1和L2,min1分别为
Figure BDA0002521254040000083
Figure BDA0002521254040000091
其中,Vo为正激变换器主电路1的输出电压;
步骤202、根据公式(A5)确定电感L2的电流
Figure BDA0002521254040000092
步骤203、根据步骤201、步骤202选取满足电感L2。
在本实施例中,所述二极管D3根据第三选取步骤选取,其中,所述第三选取步骤的步骤包括:
步骤301、根据公式(A14)计算流过二极管D3的最大电流ID3,max
Figure BDA0002521254040000093
步骤302、根据公式(A15)计算二极管D2的耐压值VD3,max
Figure BDA0002521254040000094
其中,IL1,max为流过高频变压器T的一次绕组的最大电流,IL2为流过电感L2的电流;
步骤303、根据步骤301、步骤302选取二极管D3。
当然,上述描述只是为了说明本发明技术方案的可行性,所列举的其中一种工作模式的原理及其对应的公式,但并非唯一且限定的描述,仅作为参考使用。
应当特别说明的是,以上实施例仅用以说明本发明的技术方案,而非对其限制,对本领域技术人员来说,可以对上述实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而所有这些修改和替换,都应属于本发明所附权利要求的保护范围。

Claims (6)

1.一种副边并联LCD实现正反激能量传输的正激变换器,其特征在于:包括正激变换器主电路(1)以及与正激变换器主电路(1)连接的能量转移与传输电路(2),所述正激变换器主电路(1)包括高频变压器T、开关管S、二极管D1、二极管D2、电感L1和电容C1,所述高频变压器T原边的同名端为正激变换器主电路(1)的正极电压输入端IN+且与外部电源的正极输出端连接,所述高频变压器T原边的异名端与开关管S的漏极连接,所述开关管S的源极为正激变换器主电路(1)的负极电压输入端IN-且与外部电源的负极输出端连接,所述开关管S的栅极与外部控制器的输出端连接,所述高频变压器T副边的同名端与二极管D1的阳极连接,所述二极管D1的阴极与二极管D2的阴极和电感L1的一端连接,所述电感L1的另一端与电容C1的一端连接且为正激变换器主电路(1)的正极电压输出端OUT+,所述高频变压器T副边的异名端与二极管D2的阳极和电容C1的另一端连接且为正激变换器主电路(1)的负极电压输出端OUT-,所述正激变换器主电路(1)的负极电压输出端OUT-接地;所述能量转移与传输电路(2)包括二极管D3、电容C2和电感L2,所述二极管D3的阳极与二极管D2的阳极连接,所述二极管D3的阴极与电容C2的一端连接,所述电容C2的另一端与二极管D1的阳极连接,所述电感L2的一端与二极管D3的阴极连接,其另一端与正激变换器主电路(1)的正极电压输出端OUT+连接。
2.根据权利要求1所述的副边并联LCD实现正反激能量传输的正激变换器,其特征在于:所述二极管D1、D2为快恢复二极管。
3.根据权利要求1所述的副边并联LCD实现正反激能量传输的正激变换器,其特征在于:所述开关管S为全控型功率半导体器件。
4.根据权利要求1所述的副边并联LCD实现正反激能量传输的正激变换器,其特征在于:所述副边并联LCD实现正反激能量传输的正激变换器的电容C2根据第一选取步骤选取,其中,所述第一选取步骤的步骤包括:
步骤101、选取励磁储能电容C2的容值C2
步骤102、结合变换器输入电压Vi,变压器的匝比n,计算电容C2的耐压值VC2,Ton
步骤103、选取容值为C2且耐压值大于VC2,Ton的电容作为电容C2。
5.根据权利要求4所述的副边并联LCD实现正反激能量传输的正激变换器,其特征在于:所述副边并联LCD实现正反激能量传输的正激变换器的L2根据第二选取步骤选取,其中,所述第二选取步骤的步骤包括:
步骤201、确定电感L2的电感值L2的取值范围;
步骤202、确定电感L2的电流;
步骤203、根据步骤201、步骤202选取满足电感L2。
6.根据权利要求4或5所述的副边并联LCD实现正反激能量传输的正激变换器,其特征在于:所述副边并联LCD实现正反激能量传输的正激变换器的二极管D3根据第三选取步骤选取,其中,所述第三选取步骤的步骤包括:
步骤301、计算流过二极管D3的最大电流ID3,max
步骤302、计算二极管D2的耐压值VD3,max
步骤303、根据步骤301、步骤302选取二极管D3。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113037093A (zh) * 2021-03-16 2021-06-25 西安科技大学 一种副边整流二极管并联电容的正激变换器及***

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5986899A (en) * 1996-07-18 1999-11-16 International Power Devices, Inc. Single ended forward DC-to-DC converter providing enhanced resetting for synchronous rectification
US20050073861A1 (en) * 2003-10-04 2005-04-07 Delta Electronics, Inc. Active resonant snubber for dc-dc converter
US20100067259A1 (en) * 2008-09-17 2010-03-18 Delta Electronics, Inc. Forward-flyback converter with active-clamp circuit
CN102497106A (zh) * 2011-12-05 2012-06-13 北京新雷能科技股份有限公司 一种单端正激功率变换器
CN105915060A (zh) * 2016-05-03 2016-08-31 西安科技大学 具有副边绕组磁复位功能的正激变换电路及其复位方法
WO2018135119A1 (ja) * 2017-01-23 2018-07-26 Ntn株式会社 スイッチング電源
WO2018216401A1 (ja) * 2017-05-22 2018-11-29 Ntn株式会社 絶縁型スイッチング電源

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2380666A1 (fr) * 1977-02-14 1978-09-08 Cii Honeywell Bull Systeme de commande de decoupage pour convertisseur dans une alimentation electrique continue
JPS596584B2 (ja) * 1979-09-12 1984-02-13 日本電信電話株式会社 一石式コンバ−タ
US7161331B2 (en) * 2005-04-11 2007-01-09 Yuan Ze University Boost converter utilizing bi-directional magnetic energy transfer of coupling inductor
TWI474594B (zh) * 2012-09-06 2015-02-21 Fsp Technology Inc 以順向式架構為基礎的電源轉換裝置
JP6196949B2 (ja) * 2014-08-07 2017-09-13 東芝テック株式会社 電力変換装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5986899A (en) * 1996-07-18 1999-11-16 International Power Devices, Inc. Single ended forward DC-to-DC converter providing enhanced resetting for synchronous rectification
US20050073861A1 (en) * 2003-10-04 2005-04-07 Delta Electronics, Inc. Active resonant snubber for dc-dc converter
US20100067259A1 (en) * 2008-09-17 2010-03-18 Delta Electronics, Inc. Forward-flyback converter with active-clamp circuit
CN102497106A (zh) * 2011-12-05 2012-06-13 北京新雷能科技股份有限公司 一种单端正激功率变换器
CN105915060A (zh) * 2016-05-03 2016-08-31 西安科技大学 具有副边绕组磁复位功能的正激变换电路及其复位方法
WO2018135119A1 (ja) * 2017-01-23 2018-07-26 Ntn株式会社 スイッチング電源
WO2018216401A1 (ja) * 2017-05-22 2018-11-29 Ntn株式会社 絶縁型スイッチング電源

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
GIORGIO SPIAZZI: "A High-Quality Rectifier Based on the Forward Topology With Secondary-Side Resonant Reset", 《IEEE TRANSACTIONS ON POWER ELECTRONICS》 *
张涌萍 等: "一种新型谐振磁复位的单端正激变换器设计", 《科学技术与工程》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113037093A (zh) * 2021-03-16 2021-06-25 西安科技大学 一种副边整流二极管并联电容的正激变换器及***

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