CN114157162A - 谐振式正激电路 - Google Patents

谐振式正激电路 Download PDF

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CN114157162A
CN114157162A CN202111486467.8A CN202111486467A CN114157162A CN 114157162 A CN114157162 A CN 114157162A CN 202111486467 A CN202111486467 A CN 202111486467A CN 114157162 A CN114157162 A CN 114157162A
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circuit
transformer
parallel
switch
capacitor
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徐�明
穆建国
孙巨禄
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Powerland Technology Inc
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Powerland Technology Inc
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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
    • H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
    • 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
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • 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
    • 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
    • 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
    • H02M3/338—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 a self-oscillating arrangement
    • H02M3/3385—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 a self-oscillating arrangement with automatic control of output voltage or current
    • 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

本发明公开了谐振式正激电路，实现软开关，包括原边电路、变压器和副边电路，所述原边电路的输入端接受输入电能经变压器传输给副边电路，所述原边电路包括第一开关，所述第一开关与所述变压器的原边绕组串联，所述副边电路包括第二开关，所述第二开关与所述变压器的副边绕组串联，在所述副边电路的输出端并联第一电容，所述第一电容与所述变压器的漏感谐振。

Description

谐振式正激电路
技术领域
本发明有关正激变换电路，且特别是有关于正激变换电路的软开关技术。
背景技术
现有的正激电路，如图1所示，已知技术中，正激变换电路的开关器件是硬关断，所以开关损耗大，并且副边有至少两个功率开关整流开关D1和续流开关D0，原边开关Q1关断的时候是在峰值电流关断，开关Q1不能实现ZCS；同时，副边二极管D1也是硬关断，不能实现ZCS，因而不利于电源体积的缩小，所以需要研究有利于高频化小体积的新型电路拓扑结构。
发明内容
本发明提供一种谐振式正激电路，实现了软开关技术，便于实现高频开关，从而制成小体积电源。
为达到上述目的，本发明采用的技术方案是：
谐振式正激电路，包括原边电路、变压器和副边电路，所述原边电路的输入端接受输入电能经变压器传输给副边电路，所述原边电路包括第一开关，所述第一开关与所述变压器的原边绕组串联，所述副边电路包括第二开关，所述第二开关与所述变压器的副边绕组串联，在所述副边电路的输出端并联第一电容，所述第一电容与所述变压器的漏感谐振。
上述第一开关的两端并联第二电容。
上述第变压器的原边绕组并联有源箝位模块。
多个所述谐振式正激电路交错并联，所述谐振式正激电路的原边电路的输入端并联，所述副边电路的输出端并联后并联所述第一电容。
上述第一电容的两端并联滤波电路。
为让发明的上述特征和优点能更明显易懂，下文特举实施例，并配合所附图式作详细说明如下。
附图说明
图1为已知技术中正激变换电路。
图2为本发明谐振式正激变换电路第一实施例结构图。
图3为本发明谐振式正激变换电路第二实施例结构图。
图4为本发明谐振式正激变换电路第三实施例结构图。
图5为利用图2所示正激变换电路构成的交错并联的电路结构图。
图6为利用图3所示正激变换电路构成的交错并联的电路结构图。
图7为利用图4所示正激变换电路构成的交错并联的电路结构图。
图8为图4所示电路中关键参数的波形图。
具体实施方式
为使本发明实施例的目的和技术方案更加清楚，下面将结合本发明实施例的附图，对本发明实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明中所述的“第一”、“第二”、“第三”等(如果存在)用于在类似要素之间进行区别，并且不一定是描述特定的次序或者按时间的顺序。要理解，这样使用的这些术语在适当的环境下是可互换的，使得在此描述的主题的实施例如是能够以与那些说明的次序不同的次序或者以在此描述的另外的次序来进行操作。另外，凡可能之处，在图示及实施方式中使用相同标号的组件/构件/步骤，系代表相同或类似部件。
图2是本发明谐振式正激电路的一具体实施例图，开关Q1导通时变压器T1的漏感和电容Cr产生谐振，当变压器T1的漏感和电容Cr产生谐振，谐振电流为零也即流过整流开关二极管D1的电流ID1下降到零时，控制主控开关Q1关闭，整流二极管D1同时关闭，开关Q1和二极管D1实现ZCS。
谐振式正激电路利用变压器T1的漏感作为谐振电感和电容Cr谐振，实现开关Q1的零电流关断，以及副边整流开关二极管D1的零电流关断，减小开关损耗，有利于推高开关频率，减小电源体积。
同时，与已知技术的正激变换电路相比，如图1所示，本发明的技术方案在副边不需要使用续流二极管。
电容Cr并联电感Lo和电容Co，电感Lo和电容Co组成输出滤波单元，电容Co的两端并联负载RL。
图3是本发明谐振式正激电路的另一具体实施例图，开关Q1的两端并联电容C1。
图4是本发明谐振式正激电路的又一具体实施例图，该实施例中设有有源箝位的具体实施例，请一并参考图8中信号波形图。开关Q1关闭后，变压器T1原边励磁电流给开关Q1的寄生电容充电，当Vds充到Vin+VCc后，Qc打开，Qc实现ZVS，在Q1需要导通之前Qc先关断，利用反向的励磁电流把Q1的Cds电荷抽掉，Q1的Vds电压下降到零后，控制Q1导通，从而Q1也实现ZVS，工作波形如图8所示。
图5所示，是图2所示谐振式正激电路交错并联的一个具体实施方式，该电路是图2中两个谐振式正激电路并联组合而成，其中每个谐振式正激电路工作和发明实施案例一种相同，控制这两个谐振式正激电路中的主功率开关的驱动相位差180度，实现交错并联，分时复用所述谐振电容Cr，减少电容个数，缩小体积。若有更多的谐振式正激电路并联，所述相位差相应改变。所述两个谐振式正激电路共用谐振电容Cr。共用谐振电容Cr的交错谐振正激电路，输出电流交错叠加，可以有效减小输出纹波，减少电容个数，从而降低成本和减小电源体积。输出电流交错倍频，也有利于减小滤波电感Lo。
两个谐振式正激电路并联组合，所述开关Q1和Q2占空比相同，且小于50％。
另，图3和图4所示谐振式正激电路交错并联均可以交错并联，如图6和图7所示，其工作原理与图5所示电路相同。
原边和副边主功率管都实现ZVS和ZCS，有利于实现电源的高频化；利用变压器漏感做谐振电感，节省空间，缩小电源体积。
虽然本发明已以实施例揭露如上，然其并非用以限定本发明，任何所属技术领域中具有通常知识者，在不脱离本发明的精神和范围内，当可作些许的更动与润饰，故本发明的保护范围当视后附的申请专利范围所界定者为准。

Claims (5)

1.谐振式正激电路，包括原边电路、变压器和副边电路，所述原边电路的输入端接受输入电能经变压器传输给副边电路，所述原边电路包括第一开关，所述第一开关与所述变压器的原边绕组串联，所述副边电路包括第二开关，所述第二开关与所述变压器的副边绕组串联，其特征在于，在所述副边电路的输出端并联第一电容，所述第一电容与所述变压器的漏感谐振。
2.如权利要求1所述谐振式正激电路，其特征在于，所述第一开关的两端并联第二电容。
3.如权利要求1所述谐振式正激电路，其特征在于，所述变压器的原边绕组并联有源箝位模块。
4.如权利要求1所述谐振式正激电路，其特征在于，多个所述谐振式正激电路交错并联，所述谐振式正激电路的原边电路的输入端并联，所述副边电路的输出端并联后并联所述第一电容。
5.如权利要求4所述谐振式正激电路，其特征在于，所述第一电容的两端并联滤波电路。
CN202111486467.8A 2021-12-07 2021-12-07 谐振式正激电路 Pending CN114157162A (zh)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
US20070086219A1 (en) * 2005-10-07 2007-04-19 Sony Corporation Switching power supply circuit
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CN103887976A (zh) * 2014-03-25 2014-06-25 浙江大学 电流源输入型谐振软开关dc/dc变换器
CN106385179A (zh) * 2016-10-19 2017-02-08 南京博兰得电子科技有限公司 副边谐振式隔离电源变换装置

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US20070086219A1 (en) * 2005-10-07 2007-04-19 Sony Corporation Switching power supply circuit
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CN103887976A (zh) * 2014-03-25 2014-06-25 浙江大学 电流源输入型谐振软开关dc/dc变换器
CN106385179A (zh) * 2016-10-19 2017-02-08 南京博兰得电子科技有限公司 副边谐振式隔离电源变换装置

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刘健等: "新颖的零电流准谐振正激DC-DC变换器", 《电力电子技术》, no. 6, pages 66 - 69 *
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