CN115280626A - 开关模式电力供应装置 - Google Patents

开关模式电力供应装置 Download PDF

Info

Publication number
CN115280626A
CN115280626A CN202180018712.4A CN202180018712A CN115280626A CN 115280626 A CN115280626 A CN 115280626A CN 202180018712 A CN202180018712 A CN 202180018712A CN 115280626 A CN115280626 A CN 115280626A
Authority
CN
China
Prior art keywords
voltage
power supply
feedback
mode power
unit
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202180018712.4A
Other languages
English (en)
Inventor
梁千锡
林德英
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LS Electric Co Ltd
Original Assignee
LS Electric Co Ltd
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
Publication date
Application filed by LS Electric Co Ltd filed Critical LS Electric Co Ltd
Publication of CN115280626A publication Critical patent/CN115280626A/zh
Pending legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
    • H02H7/1222Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to abnormalities in the input circuit, e.g. transients in the DC input
    • 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
    • H02M3/33507Conversion 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
    • H02M3/33523Conversion 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/1213Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
    • 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
    • H02M1/0003Details of control, feedback or regulation circuits
    • 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
    • H02M1/0003Details of control, feedback or regulation circuits
    • H02M1/0025Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
    • 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/32Means for protecting converters other than automatic disconnection
    • H02M1/327Means for protecting converters other than automatic disconnection against abnormal temperatures
    • 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
    • H02M3/33507Conversion 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
    • 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
    • H02M3/33561Conversion 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 more than one ouput with independent control
    • 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
    • H02M1/34Snubber circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

本发明提供一种开关模式电力供应装置,其包括:初级侧电路部,包括提供输入电压的输入电路和使输入电路通电或断开的半导体开关;变压器,包括与初级侧电路部连接的初级绕组和与初级绕组磁连接的复数个次级绕组;复数个次级侧电路部,分别与复数个次级绕组连接,供应复数个输出电压;反馈电路部,反馈接收复数个输出电压中的任一个,计算用于恒定地控制输出电压的补偿电压;控制部,根据补偿电压来控制半导体开关的接通断开占空比;以及保护电路部,反馈接收复数个输出电压中的任一个,判断反馈电路部有无故障,在反馈电路部故障时,切断所述控制部的电源。

Description

开关模式电力供应装置
技术领域
本发明涉及开关模式电力供应装置。
背景技术
逆变器是一种在接收商用交流电源并转换为直流(DC)后,再次将其转换为交流(AC)并提供给电动机的电力转换装置。这样的逆变器可以以各种形态使用于风扇(Fan)、泵、电梯、移送装置、生产线等整个工业中。
通常,逆变器不仅包括执行电力转换功能的电路,还包括用于通信、保护以及控制等的电路。其中,为了这些电路的动作,需要向各个电路稳定地供应符合额定的电压,为此,逆变器具备开关模式电力供应装置(Switching Mode Power Supply;SMPS)。
如上所述,开关模式电力供应装置是向控制整个逆变器的控制部和执行其他主要功能的电路供应电力的装置,因此,当开关模式电力供应装置的动作发生问题时,也对逆变器的主动作产生影响。
尤其,在开关模式电力供应装置发生故障时,输出电压可能过度上升而引起发热,从而逆变器可能会受到损伤。
发明内容
发明所要解决的问题
本发明的目的在于,提供一种开关模式电力供应装置,其通过在反馈电路部故障时切断控制部的电源,来防止输出电压过度上升,从而能够防止逆变器的损伤。
本发明所要解决的技术课题不限于以上提及的技术课题,本发明所属技术领域的技术人员可以从以下记载明确理解未被提及的其他技术课题。
解决问题的技术方案
为了解决这样的课题,本发明提供一种开关模式电力供应装置,其包括:初级侧电路部,包括提供输入电压的输入电路和使输入电路通电或断开的半导体开关;变压器,包括与初级侧电路部连接的初级绕组和与初级绕组磁连接的复数个次级绕组;复数个次级侧电路部,分别与复数个次级绕组连接,供应复数个输出电压;反馈电路部,反馈接收复数个输出电压中的任一个,计算用于恒定地控制输出电压的补偿电压;控制部,根据补偿电压来控制半导体开关的接通断开占空比;以及保护电路部,反馈接收复数个输出电压中的任一个,判断反馈电路部有无故障,在反馈电路部故障时,切断所述控制部的电源。
其中,变压器还包括与复数个次级绕组磁连接的偏置绕组。
另外,控制部、反馈电路部以及保护电路部与偏置绕组电连接,并且将从次级绕组感应到偏置绕组的偏置电压作为电源接收。
另外,在反馈电路部故障时,保护电路部将保护电路部的电源接地。
另外,若反馈接收的输出电压为基准电压以上,则保护电路部判断为反馈电路部故障。
另外,反馈电路部包括:第一感测部,检测反馈接收的输出电压;以及算出部,与第一感测部光连接,接收来自第一感测部的输出电压。
另外,算出部计算与输出电压和目标电压之差相当的补偿电压。
另外,控制部随着补偿电压增大而使接通断开占空比减小。
另外,基准电压设定为大于所述目标电压。
另外,保护电路部包括:第二感测部,检测反馈接收的输出电压;以及判断部,与第二感测部光连接,接收来自第二感测部的输出电压。
发明效果
根据本发明,具有通过在反馈电路部故障时切断控制部的电源,来防止输出电压过度上升,从而能够防止逆变器的损伤的效果。
本发明的效果不限于以上提及的效果,本发明所属技术领域的技术人员可以从以下记载明确理解未被提及的其他效果。
附图说明
图1是现有的开关模式电力供应装置的示意性框图。
图2是现有的开关模式电力供应装置的具体电路图。
图3是示出图1和图2的反馈电路部故障时产生的反馈电压和偏置电压的变化的曲线图。
图4是本发明实施例的开关模式电力供应装置的示意性框图。
图5是本发明实施例的开关模式电力供应装置的具体电路图。
图6是示出图4和图5的反馈电路部故障时产生的反馈电压和偏置电压的变化的曲线图。
具体实施方式
须了解本说明书和附加的权利要求书中所使用的术语不应理解为受限于通用的及字典中的含意,而是基于允许本发明人针对最佳解释适当地定义术语的原则以对应本发明的技术方式的含意及概念为基础加以解释。
因此,本说明书所记载的实施例和附图中图示的构成仅是优选实施例,而非意欲限制本发明的技术思想,因此需要理解可以在不偏离本发明的范围的情况下作出其他的等同物及修改物。
下面,参照附图对本发明的实施例进行详细的说明,以使本领域技术人员能够容易实施。
图1是现有的开关模式电力供应装置的示意性框图,图2是现有的开关模式电力供应装置的具体电路图。
如图1和图2所示,现有的开关模式电力供应装置可以包括初级侧电路部10、变压器20、复数个次级侧电路部30、反馈电路部40以及控制部50。
初级侧电路部10包括:输入电路,提供输入电压Vi;以及半导体开关SW,使输入电路通电或断开。
输入电路可以包括:输入端,从商用交流电源接收输入电压Vi;输出端,连接于变压器20的初级绕组;输入电容Ci,连接于输入端;以及缓冲电路11,与变压器20的初级绕组并联连接。
其中,当输入电压Vi输入于输入端时,输入电压Vi中包含的直流分量(DC)通过输入电容Ci被整流并施加于变压器20的初级绕组。其中,通过半导体开关SW的接通或断开(On/Off)来控制向变压器20的初级绕组施加或切断输入电压Vi。此外,缓冲电路11起到防止半导体开关SW的开关时产生的过电压的作用。
现有的开关模式电力供应装置采用反激式拓扑(Fly-Back Topology)。具体而言,当半导体开关SW接通(Turn-On)时,输入电路通电,当半导体开关SW断开(Turn-Off)时,输入电路被切断。此外,当半导体开关SW接通时,电能储存到变压器20的初级绕组,当半导体开关SW断开时,储存于变压器20的初级绕组的电能向变压器20的次级绕组传递。
其中,变压器20可以作为耦合电感(Coupling inductor)动作以获得稳定的输出电压。
变压器20包括:初级绕组,与初级侧电路部10连接;以及复数个次级绕组,与初级绕组磁连接。其中,当输入电压Vi施加于初级绕组时,在复数个次级绕组分别感应出感应电压。
复数个次级侧电路部30与复数个次级绕组分别连接并供应复数个输出电压Vo。其中,复数个输出电压Vo可以是彼此不同的电压电平。
具体而言,复数个次级侧电路部30包括:输出二极管Do,与复数个次级绕组分别串联连接并整流感应电压;以及输出电容Co,与次级绕组分别并联连接并平滑感应电压。其中,复数个次级侧电路部30独立动作而不彼此联动。
反馈电路部40反馈接收复数个输出电压Vo中的任一个,并计算用于恒定地控制输出电压Vo的补偿电压。
具体而言,反馈电路部40包括:感测部41,检测反馈接收的输出电压(以下,反馈电压Vf);以及算出部42,与感测部41光连接并接收来自感测部41的反馈电压Vf。
在反馈电路部40中,算出部42通过光连接来接收来自感测部41的反馈电压Vf,从而能够去除噪声。
算出部42可以计算与反馈电压Vf和目标电压之差相当的补偿电压。其中,目标电压可以预设为负载所需的电压。
控制部50根据由反馈电路部40计算的补偿电压来控制半导体开关SW的接通断开占空(Duty)比。例如,在反馈电压Vf低于目标电压的情况下,控制部50增加接通断开占空比,在反馈电压Vf高于目标电压的情况下,控制部50减小接通断开占空比。
由此,通过使输出电压Vo追随目标电压,来能够恒定地保持输出电压Vo。
变压器20还包括与复数个次级绕组磁连接的偏置绕组。其中,控制部50将从次级绕组感应到偏置绕组的偏置电压Vb作为电源接收。
为此,现有的开关模式电力供应装置包括:二极管Db,与偏置绕组串联连接,整流偏置电压Vb;以及偏置电容Cb,与偏置绕组并联连接,平滑偏置电压Vb。
其中,偏置电压Vb可以作为电源向反馈电路部40供应。
另一方面,当在反馈电路部40发生故障时,输出电压Vo可能因无法追随目标电压而过度上升,并且逆变器可能因由此引起的发热而损伤。
图3是示出图1和图2的反馈电路部故障时产生的反馈电压和偏置电压的变化的曲线图。其中,横轴表示时间T,纵轴表示电压V,T1表示在反馈电路部40发生故障的时间点。
如图3所示,可以确认到,在反馈电路部40正常动作的T1之前,反馈电压Vf(=输出电压Vo)追随目标电压Vt并保持恒定,而在反馈电路部40发生故障的T1时间点,反馈电压Vf上升。
另外,可以确认到,在反馈电路部40正常动作的T1之前,由于输出电压Vo恒定,因此偏置电压Vb(=控制部电源)也保持恒定,但是在反馈电路部40发生故障的T1时间点,由于输出电压Vo上升,因此偏置电压Vb也上升。
如上所述,在反馈电路部40发生故障而使得输出电压Vo过度上升的情况下,逆变器可能因由此引起的发热而损伤。
图4是本发明实施例的开关模式电力供应装置的示意性框图,图5是本发明实施例的开关模式电力供应装置的具体电路图。
如图4和图5所示,本发明实施例的开关模式电力供应装置可以包括初级侧电路部110、变压器120、复数个次级侧电路部130、反馈电路部140、控制部150以及保护电路部160。
初级侧电路部110包括:输入电路,提供输入电压Vi;以及半导体开关SW,使输入电路通电或断开。
输入电路可以包括:输入端,从商用交流电源接收输入电压Vi;输出端,连接于变压器120的初级绕组;输入电容Ci,连接于输入端;以及缓冲电路111,与变压器120的初级绕组并联连接。
其中,当输入电压Vi输入于输入端时,输入电压Vi中包含的直流分量(DC)通过输入电容Ci被整流并施加于变压器120的初级绕组。其中,通过半导体开关SW的接通或断开(On/Off)来控制向变压器120的初级绕组施加或切断输入电压Vi。此外,缓冲电路111起到防止半导体开关SW的开关时产生的过电压的作用。
本发明实施例的开关模式电力供应装置采用反激式拓扑(Fly-Back Topology)。具体而言,当半导体开关SW接通(Turn-On)时,输入电路通电,当半导体开关SW断开(Turn-Off)时,输入电路被切断。此外,当半导体开关SW接通时,电能储存到变压器120的初级绕组,当半导体开关SW断开时,储存于变压器120的初级绕组的电能向变压器120的次级绕组传递。
其中,变压器120可以作为耦合电感(Coupling inductor)动作以获得稳定的输出电压。
变压器120包括:初级绕组,与初级侧电路部110连接;以及复数个次级绕组,与初级绕组磁连接。其中,当输入电压Vi施加于初级绕组时,在复数个次级绕组分别感应出感应电压。
复数个次级侧电路部130与复数个次级绕组分别连接并供应复数个输出电压Vo。其中,复数个输出电压Vo可以是彼此不同的电压电平。
具体而言,复数个次级侧电路部130包括:输出二极管Do,与复数个次级绕组分别串联连接并整流感应电压;以及输出电容Co,与次级绕组分别并联连接并平滑感应电压。其中,复数个次级侧电路部130独立动作而不彼此联动。
反馈电路部140反馈接收复数个输出电压Vo中的任一个,并计算用于恒定地控制输出电压Vo的补偿电压。
具体而言,反馈电路部140包括:第一感测部141,检测反馈接收的输出电压(以下,反馈电压Vf);以及算出部142,与第一感测部141光连接并接收来自第一感测部141的反馈电压Vf。
在反馈电路部140中,算出部142通过光连接来接收来自第一感测部141的反馈电压Vf,从而能够去除噪声(noise)。
算出部142可以计算与反馈电压Vf和目标电压之差相当的补偿电压。其中,目标电压可以预设为负载所需的电压。
控制部150根据由反馈电路部140计算的补偿电压来控制半导体开关SW的接通断开占空(Duty)比。例如,在反馈电压Vf低于目标电压的情况下,控制部150增加接通断开占空比,在反馈电压Vf高于目标电压的情况下,控制部50减小接通断开占空比。
由此,通过使输出电压Vo追随目标电压,来能够恒定地保持输出电压Vo。
变压器120还包括与复数个次级绕组磁连接的偏置绕组。其中,反馈电路部140、控制部150以及保护电路部160与偏置绕组电连接,并将从次级绕组感应到偏置绕组的偏置电压Vb作为电源接收。
为此,本发明实施例的开关模式电力供应装置包括:二极管Db,与偏置绕组串联连接,整流偏置电压Vb;以及偏置电容Cb,与偏置绕组并联连接,平滑偏置电压Vb。
其中,偏置电压Vb可以作为电源向反馈电路部140供应。
另一方面,当在反馈电路部140发生故障时,输出电压Vo可能因无法追随目标电压而过度上升,并且逆变器可能因由此引起的发热而损伤。
为了解决如上所述的问题,保护电路部160反馈接收复数个输出电压中的任一个并判断反馈电路部140有无故障,在反馈电路部140故障时,切断控制部150的电源。即,当反馈电路部140故障时,保护电路部160通过使保护电路部160的电源接地来使控制部150的电源也接地。
于是,控制部150的电源降低,使得控制部150断开,从而开关模式电力供应装置被关闭(Shut down)。由此,防止输出电压过度上升,从而能够防止逆变器的损伤。
具体而言,保护电路部160可以包括:第二感测部161,检测反馈电压Vf;以及判断部162,与第二感测部161光连接,接收来自第二感测部161的反馈电压Vf。
在保护电路部160中,判断部162通过光连接来接收来自第二感测部161的反馈电压Vf,从而能够去除噪声(noise)。
若反馈电压Vf为基准电压以上,则判断部162判断为反馈电路部140故障,若反馈电压Vf小于基准电压,则判断部162判断为反馈电路部140正常。
其中,优选地,在反馈电路部140正常的情况下,基准电压设定为大于目标电压,以免保护电路部160动作。
图6是示出图4和图5的反馈电路部故障时产生的反馈电压和偏置电压的变化的曲线图。其中,横轴表示时间T,纵轴表示电压V,T1表示在反馈电路部40发生故障的时间点。
如图6所示,可以确认到,在反馈电路部140正常动作的T1之前,反馈电压Vf(=输出电压Vo)追随目标电压Vt并保持恒定,而在反馈电路部140发生故障的T1时间点,反馈电压Vf上升。
另外,可以确认到,在反馈电路部140正常动作的T1之前,由于输出电压Vo恒定,因此偏置电压Vb(=控制部150电源)也保持恒定,但是在反馈电路部140发生故障的T1时间点,由于输出电压Vo上升,因此偏置电压Vb也上升。
之后,在反馈电压Vf达到基准电压Vr的T2时间点,保护电路部160动作。即,在T2时间点,保护电路部160使偏置电压Vb向接地降低(Sink)。于是,偏置电压Vb逐渐降低并收敛到0V。在输出电容Co的作用下,反馈电压Vf不会在T2时间点直接降低,而是从偏置电压Vb达到控制部150的切断电压Voff的T3时间点降低并收敛到0V。
如上所述,在反馈电路部140发生故障的情况下,通过使保护电路部160切断控制部150的电源,来防止输出电压Vo过度上升,从而能够防止因发热引起的逆变器的损伤。
以上的详细说明例示出本发明。另外,上述的内容仅用于示出并说明本发明的优选的实施方式,本发明可以使用在各种其他组合、变更以及环境。即,可以在本说明书中公开的发明的概念的范围和/或与前述的公开内容等同的范围和/或本领域技术或知识范围内进行变更或修正。上述的实施例用于说明实施本发明的最佳状态,在使用与本发明相同的其他发明时,可以以本领域已知的其他状态实施,并且还能够进行发明的具体应用领域和用途所需的各种变更。因此,以上发明的详细说明并非旨在以公开的实施状态限制本发明。另外,所附权利要求保护范围应被解释为还包括其他实施状态。
产业上的可利用性
本发明的开关模式电力供应装置可以应用于逆变器等各种工业领域中。

Claims (10)

1.一种开关模式电力供应装置,其中,
包括:
初级侧电路部,包括提供输入电压的输入电路和使所述输入电路通电或断开的半导体开关;
变压器,包括与所述初级侧电路部连接的初级绕组和与所述初级绕组磁连接的复数个次级绕组;
复数个次级侧电路部,分别与复数个所述次级绕组连接,供应复数个输出电压;
反馈电路部,反馈接收复数个所述输出电压中的任一个,计算用于恒定地控制所述输出电压的补偿电压;
控制部,根据所述补偿电压来控制所述半导体开关的接通断开占空比;以及
保护电路部,反馈接收复数个所述输出电压中的任一个,判断所述反馈电路部有无故障,在所述反馈电路部故障时,切断所述控制部的电源。
2.根据权利要求1所述的开关模式电力供应装置,其中,
所述变压器还包括:
偏置绕组,与复数个所述次级绕组磁连接。
3.根据权利要求2所述的开关模式电力供应装置,其中,
所述控制部、反馈电路部以及保护电路部与所述偏置绕组电连接,并且将从所述次级绕组感应到所述偏置绕组的偏置电压作为电源接收。
4.根据权利要求3所述的开关模式电力供应装置,其中,
在所述反馈电路部故障时,所述保护电路部将所述保护电路部的电源接地。
5.根据权利要求1所述的开关模式电力供应装置,其中,
若反馈接收的所述输出电压为基准电压以上,则所述保护电路部判断为所述反馈电路部故障。
6.根据权利要求5所述的开关模式电力供应装置,其中,
所述反馈电路部包括:
第一感测部,检测反馈接收的所述输出电压;以及
算出部,与所述第一感测部光连接,接收来自所述第一感测部的所述输出电压。
7.根据权利要求6所述的开关模式电力供应装置,其中,
所述算出部计算与所述输出电压和目标电压之差相当的所述补偿电压。
8.根据权利要求7所述的开关模式电力供应装置,其中,
所述控制部随着所述补偿电压增大而使所述接通断开占空比减小。
9.根据权利要求7所述的开关模式电力供应装置,其中,
所述基准电压设定为大于所述目标电压。
10.根据权利要求1所述的开关模式电力供应装置,其中,
所述保护电路部包括:
第二感测部,检测反馈接收的所述输出电压;以及
判断部,与所述第二感测部光连接,接收来自所述第二感测部的所述输出电压。
CN202180018712.4A 2020-03-04 2021-02-25 开关模式电力供应装置 Pending CN115280626A (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR10-2020-0027033 2020-03-04
KR1020200027033A KR102334524B1 (ko) 2020-03-04 2020-03-04 스위칭 모드 전력 공급 장치
PCT/KR2021/002363 WO2021177655A1 (ko) 2020-03-04 2021-02-25 스위칭 모드 전력 공급 장치

Publications (1)

Publication Number Publication Date
CN115280626A true CN115280626A (zh) 2022-11-01

Family

ID=77614099

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202180018712.4A Pending CN115280626A (zh) 2020-03-04 2021-02-25 开关模式电力供应装置

Country Status (5)

Country Link
US (1) US20230104318A1 (zh)
EP (1) EP4117129A4 (zh)
KR (1) KR102334524B1 (zh)
CN (1) CN115280626A (zh)
WO (1) WO2021177655A1 (zh)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200141318Y1 (ko) 1996-02-05 1999-05-15 김광호 Smps의 제어 ic의 상위 전압 폐쇄 회로
KR101213696B1 (ko) 2005-10-27 2012-12-18 삼성전자주식회사 과전압 보호 장치
KR100919207B1 (ko) * 2007-04-03 2009-09-28 엘에스산전 주식회사 인버터용 동기 옵션 보드의 전원 회로
KR20080112704A (ko) * 2007-06-22 2008-12-26 엘지이노텍 주식회사 과전압 보호회로
JP2009182117A (ja) * 2008-01-30 2009-08-13 Yamaha Motor Co Ltd 部品供給装置および実装機
US9941689B2 (en) * 2011-11-07 2018-04-10 S-Printing Solution Co., Ltd. Switching mode power supply including surge protection circuit and image forming apparatus including the same
US9887564B2 (en) * 2014-02-13 2018-02-06 Infineon Technologies Austria Ag Switched mode power supply circuit
US10355602B2 (en) * 2017-01-18 2019-07-16 Analog Devices Global Fault suppression or recovery for isolated conversion

Also Published As

Publication number Publication date
US20230104318A1 (en) 2023-04-06
KR102334524B1 (ko) 2021-12-02
KR20210112011A (ko) 2021-09-14
EP4117129A4 (en) 2024-04-03
EP4117129A1 (en) 2023-01-11
WO2021177655A1 (ko) 2021-09-10

Similar Documents

Publication Publication Date Title
US10355605B1 (en) Adjustable frequency curve for flyback converter at green mode
AU2014355917B2 (en) Power source apparatus and electric device
JP5584089B2 (ja) 力率を増加させた駆動回路
TWM568411U (zh) 切換模式電力供應器控制器以及切換模式電力供應器
JP5056395B2 (ja) スイッチング電源装置
EP3282571A1 (en) Power converter with extended hold-up time
US20080291709A1 (en) Switching power supply apparatus
WO2001010005A1 (en) A resonant mode power supply having over-power and over-current protection
US7375990B2 (en) Switching power device
US10348208B2 (en) Power controllers and control methods thereof for switching mode power supplies
US20150280585A1 (en) Switching power-supply device
JP2017508437A (ja) 共振コンバータにおける適応型同期スイッチング
US8085560B2 (en) Power supply apparatus
US20060023477A1 (en) Electronic apparatus
CN112953175A (zh) 隔离式电压变换系统及原边控制电路和方法
US20040066662A1 (en) Power supply device and method having a spark prevention function
JP4375839B2 (ja) スイッチング電源装置
US10615681B2 (en) Switching power supply circuit
CN115280626A (zh) 开关模式电力供应装置
JP2005176535A (ja) スイッチング電源装置
US9954453B1 (en) Switching power supply device and switching control circuit
JP4650101B2 (ja) スイッチング電源装置、及びオーディオアンプシステム
JP6101744B2 (ja) スイッチング電源装置
CN219268736U (zh) 输入电压的调节电路
KR101043586B1 (ko) 스위칭 모드 전원 회로

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination