CN104300789A - 大功率可调直流稳压电源 - Google Patents

大功率可调直流稳压电源 Download PDF

Info

Publication number
CN104300789A
CN104300789A CN201410628592.1A CN201410628592A CN104300789A CN 104300789 A CN104300789 A CN 104300789A CN 201410628592 A CN201410628592 A CN 201410628592A CN 104300789 A CN104300789 A CN 104300789A
Authority
CN
China
Prior art keywords
circuit
resistance
power
electrochemical capacitor
reference voltage
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
CN201410628592.1A
Other languages
English (en)
Inventor
黄月华
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CN201410628592.1A priority Critical patent/CN104300789A/zh
Publication of CN104300789A publication Critical patent/CN104300789A/zh
Pending legal-status Critical Current

Links

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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
    • 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
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/1563—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators without using an external clock

Landscapes

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

Abstract

本发明提供了一种大功率可调直流稳压电源，其特征包括：220V交流电源、交流降压全桥整流及滤波电路、分压及输出电压调整电路、采样放大及功率调整电路；所述的分压及输出电压调整电路由电阻R2、线性电位器RP和电阻R3组成；所述的采样放大及功率调整电路由三端可调基准电压源、电阻R1和电解电容C2、NPN型晶体管BG1与NPN型大功率晶体管BG2及电解电容C3组成，三端可调基准电压源IC1选用的型号为TL431。本发明采用高精度三端可调基准电压源TL431作为电路的采样放大元件，设计用射极输出电路，该直流稳压电源不仅能够输出大电流、输出电压可调，而且大大提高了电源的转换效率和工作可靠性。

Description

大功率可调直流稳压电源
技术领域
本发明属于电子技术与电源技术领域，是关于一种大功率可调直流稳压电源。
背景技术
大功率可调直流稳压电源是一般电子工程技术人员或实验室必备的电子设备。过去大功率串联可调稳压电源中的调整管多用大功率锗晶体管，其主要缺陷是调整管的损耗大、致使电源转换的效率很低，不易制作大电流输出的稳压电源。为了弥补市面上有些可调稳压电源存在的缺憾，本发明所述的大功率可调直流稳压电源采用高精度三端可调基准电压源TL431作为电路的采样放大元件，设计用射极输出电路，该直流稳压电源不仅能够输出大电流、输出电压可调，而且大大提高了电源的转换效率和工作可靠性。
以下详细说明本发明所述的大功率可调直流稳压电源在实施过程中所涉及的必要的、关键性的技术内容。
发明内容
发明目的及有益效果：大功率可调直流稳压电源是一般电子工程技术人员或实验室必备的电子设备。过去大功率串联可调稳压电源中的调整管多用大功率锗晶体管，其主要缺陷是调整管的损耗大、致使电源转换的效率很低，不易制作大电流输出的稳压电源。为了弥补市面上有些可调稳压电源存在的缺憾，本发明所述的大功率可调直流稳压电源采用高精度三端可调基准电压源TL431作为电路的采样放大元件，设计用射极输出电路，该直流稳压电源不仅能够输出大电流、输出电压可调，而且大大提高了电源的转换效率和运行可靠性。
电路工作原理：用性能优异的三端可调基准电压源IC1(TL431)制作大功率可调直流稳压电源，电路中NPN型晶体管BG1与NPN型大功率晶体管BG2为复合功率调整管，电阻R1是NPN型晶体管BG1的偏置电阻，为NPN型晶体管BG1提供基极电流，经NPN型晶体管BG1电流放大后，用NPN型晶体管BG1的发射极再输送给大功率NPN型晶体管BG2进行电流放大，因NPN型晶体管BG1、NPN型大功率管BG2构成射极输出电路，它具有输出阻抗低，可为负载提供较大的射极输出电流。直流输出电压经电阻R2、电位器RP和电阻R3分压后，取样电压送到三端可调基准电压源IC1的采样端，由于三端可调基准电压源IC1具有基准电压源兼电压比较功能，经电压比较后，三端可调基准电压源IC1的控制端送出误差校正电位，用于控制NPN型大功率管BG1的基极电压；当输出电压因某种原因升高时，取样电压也按比例上升，三端可调基准电压源IC1(TL431)采样端得到升高的采样电压后，经与内部2.5V基准电压比较，三端可调基准电压源IC1的控制端便输出低电压(反相)，把NPN型晶体管BG1基极电压拉低，NPN型大功率晶体管BG2的射极输出自然降低，经过一系列反馈，最终使直流输出电压稳定在设定值上；直流输出电压下降时，其稳压调整过程则与上述工作过程相反。即使电位器RP出现故障，仅使输出电压下降，决不会烧坏用电设备。
附图说明
附图1是本发明提供一个大功率可调直流稳压电源的实施例电路工作原理图。
具体实施方式
按照附图1所示的大功率可调直流稳压电源电路工作原理图和附图说明，并按照发明内容所述的各部分电路中元器件之间连接关系，以及实施方式中所述的元器件技术参数要求和电路制作要点进行实施即可实现本发明，以下结合实施例对本发明的相关技术作进一步描述。
技术方案：大功率可调直流稳压电源，它包括220V交流电源、交流降压全桥整流及滤波电路、分压及输出电压调整电路、采样放大及功率调整电路，其特征在于：
交流降压全桥整流及滤波电路：交流变压器B初级线圈L1的两端接220V交流电源，交流变压器B次级线圈L2两端分别接全桥整流元件QZ交流电输入端，全桥整流元件QZ的正极输出端接电解电容C1正极和电路正极VCC，全桥整流元件QZ的负极输出端与电解电容C1负极及电路地GND相连；
分压及输出电压调整电路：它由电阻R2、线性电位器RP和电阻R3组成，电阻R2一端接稳压输出端子VCC1，电阻R2另一端接线性电位器RP一端和三端可调基准电压源IC1的采样端，线性电位器RP另一端通过电阻R3接电路地GND；
采样放大及功率调整电路：它由三端可调基准电压源、电阻R1和电解电容C2、NPN型晶体管BG1与NPN型大功率晶体管BG2及电解电容C3组成，三端可调基准电压源IC1选用的型号为TL431，三端可调基准电压源IC1的负端接NPN型晶体管BG1基极和电阻R1一端及电解电容C2正极，电阻R1另一端接电路正极VCC，三端可调基准电压源IC1的正端和电解电容C2负极接电路地GND，NPN型晶体管BG1的集电极和NPN型大功率晶体管BG2的集电极接电路正极VCC，NPN型晶体管BG1的发射极接NPN型大功率晶体管BG2的基极，NPN型大功率晶体管BG2发射极接电解电容C3正极和稳压输出端子VCC1，电解电容C3负极接电路地GND和稳压输出端子负极。
元器件的技术参数及选择要求
QZ为全桥整流元件，要求工作电流≥3A，工作电压≥100V；
IC1为三端可调基准电压源，选用的型号为TL431或KA431，封装形式T0—92，3个引脚分别是采样端、控制端端和接地端；控制端端和接地端输出电压在2.5～36V之间连续可调，工作电流范围0.1～100mA；
BG1为NPN型晶体管，选用2SC9013、3DG8050、3DG12等型号，要求β≥110；
BG2为NPN型大功率晶体管，选用的型号为C5198，参数为BVceo140V、Icm10A、Pcm1OOW；
电阻R1的阻值为12KΩ，电阻R2的阻值为1KΩ，电阻R3的阻值为510Ω，线性电位器RP的阻值为4.7KΩ；
电解电容C1选用4700μF/50V，电解电容C2选用10μF/50V，电解电容C3选用2200μF/50V。
电路制作要点与电路调试
因大功率可调直流稳压电源的电路结构比较简单，制作比较容易，一般情况下只要选用的电子元器件性能完好，并按照说明书附图1中的元器件连接关系进行焊接，物理连接线及焊接质量经过仔细检查正确无误后，本发明的电路基本不需要进行调试即可正常工作；
交流电源变压器B功率≥200W，次级线圈L2电压为36V，次级线圈L2的工作电流≥6A；
电路调试：先将线性电位器RP的阻值调至最小值，使稳压输出电压为30V,若输出电压值不符，可适当调整电阻R3的阻值，线性电位器RP的最大阻值决定稳压输出的最低电压值。
本发明的电路元器件布局、电路结构设计、它的外观的形状及尺寸大小等均不是本发明的关键技术，因不影响本发明具体实施过程，也不是本发明要求保护的技术内容，故不在说明书中一一说明。

Claims (1)

1.一种大功率可调直流稳压电源，它包括220V交流电源、交流降压全桥整流及滤波电路、分压及输出电压调整电路、采样放大及功率调整电路，其特征在于：
所述的交流降压全桥整流及滤波电路中，交流变压器B初级线圈L1的两端接220V交流电源，交流变压器B次级线圈L2两端分别接全桥整流元件QZ交流电输入端，全桥整流元件QZ的正极输出端接电解电容C1正极和电路正极VCC，全桥整流元件QZ的负极输出端与电解电容C1负极及电路地GND相连；
所述的分压及输出电压调整电路由电阻R2、线性电位器RP和电阻R3组成，电阻R2一端接稳压输出端子VCC1，电阻R2另一端接线性电位器RP一端和三端可调基准电压源IC1的采样端，线性电位器RP另一端通过电阻R3接电路地GND；
所述的采样放大及功率调整电路由三端可调基准电压源、电阻R1和电解电容C2、NPN型晶体管BG1与NPN型大功率晶体管BG2及电解电容C3组成，三端可调基准电压源IC1选用的型号为TL431，三端可调基准电压源IC1的负端接NPN型晶体管BG1基极和电阻R1一端及电解电容C2正极，电阻R1另一端接电路正极VCC，三端可调基准电压源IC1的正端和电解电容C2负极接电路地GND，NPN型晶体管BG1的集电极和NPN型大功率晶体管BG2的集电极接电路正极VCC，NPN型晶体管BG1的发射极接NPN型大功率晶体管BG2的基极，NPN型大功率晶体管BG2发射极接电解电容C3正极和稳压输出端子VCC1，电解电容C3负极接电路地GND和稳压输出端子负极。
CN201410628592.1A 2014-11-10 2014-11-10 大功率可调直流稳压电源 Pending CN104300789A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410628592.1A CN104300789A (zh) 2014-11-10 2014-11-10 大功率可调直流稳压电源

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410628592.1A CN104300789A (zh) 2014-11-10 2014-11-10 大功率可调直流稳压电源

Publications (1)

Publication Number Publication Date
CN104300789A true CN104300789A (zh) 2015-01-21

Family

ID=52320407

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410628592.1A Pending CN104300789A (zh) 2014-11-10 2014-11-10 大功率可调直流稳压电源

Country Status (1)

Country Link
CN (1) CN104300789A (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104967340A (zh) * 2015-06-18 2015-10-07 周玉林 大功率可调直流稳压电源
CN105867507A (zh) * 2016-04-16 2016-08-17 合肥博雷电气有限公司 一种大功率可调直流稳压电源
CN112147564A (zh) * 2020-09-09 2020-12-29 浙江永泰隆电子股份有限公司 高精度直流电压源

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012170215A (ja) * 2011-02-14 2012-09-06 Rohm Co Ltd スイッチング電源装置
CN202735878U (zh) * 2012-07-25 2013-02-13 周芸 大电流可调稳压器

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012170215A (ja) * 2011-02-14 2012-09-06 Rohm Co Ltd スイッチング電源装置
CN202735878U (zh) * 2012-07-25 2013-02-13 周芸 大电流可调稳压器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
贾建章等: "《最新集成电路设计手册 2》", 31 March 2004 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104967340A (zh) * 2015-06-18 2015-10-07 周玉林 大功率可调直流稳压电源
CN105867507A (zh) * 2016-04-16 2016-08-17 合肥博雷电气有限公司 一种大功率可调直流稳压电源
CN112147564A (zh) * 2020-09-09 2020-12-29 浙江永泰隆电子股份有限公司 高精度直流电压源
CN112147564B (zh) * 2020-09-09 2023-11-10 浙江永泰隆电子股份有限公司 高精度直流电压源

Similar Documents

Publication Publication Date Title
CN107733219A (zh) 一种开关电源输出软启动电路
CN104300789A (zh) 大功率可调直流稳压电源
CN104410281A (zh) 一种基于逻辑保护射极耦合式的光束激发脉冲调宽电源
CN204145296U (zh) 一种直流数控电源
CN104953868A (zh) 基于相敏检波电路的脉冲调宽式开关稳压电源
CN102185503A (zh) 用基准电压源制作的大功率可调稳压电源
CN202395671U (zh) 用tl431制作的大功率可调稳压电源
CN102751887A (zh) 大功率可调直流稳压电源
CN206992964U (zh) 一种双路输出交调补偿电路及双路输出反激电路
CN202737766U (zh) 大功率可调直流稳压电源
CN203301362U (zh) 高效大功率可调稳压电源
CN201985772U (zh) 用基准电压源制作的大功率可调稳压电源
CN104467435A (zh) 一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源
CN205142005U (zh) Pwm调压电路及恒压源电路
CN204044234U (zh) 一种高精度过流检测电路及稳压电源
CN204271611U (zh) 一种交流输入过欠压保护电路
CN105511544A (zh) 可调式稳压电路
CN204376702U (zh) 并联式小功率直流稳压电源
CN101726649B (zh) 一种信号检测电路、应急电源切换装置及应急灯
CN104967321A (zh) 一种基于相敏检波电路的平衡调制式多路输出稳压电源
CN104470093A (zh) 一种激发式大电流led恒定开关稳压电源
CN107800284A (zh) 一种低压供电稳压电源电路
CN204334364U (zh) 一种基于逻辑保护射极耦合式的非线性负反馈开关稳压电源
CN204119573U (zh) 5w led驱动电路
CN203968002U (zh) 带有输出过压保护功能的led自激振荡驱动电路

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20150121