A DC power supply 220V AC voltage into 1.25V130V continuously adjustable. The utility model is composed of a power transformer, a T, five groups of bridge rectifier filtering circuits, a set of three end adjustable integrated voltage stabilizing circuits, four groups of three fixed voltage stabilizing circuits, a slow starting circuit and a protective component. The secondary voltage is induced from the secondary transformer of the power transformer to the same AC voltage of the five sets of 27V. After the bridge rectification and filtering, the DC voltage below 40V is obtained, and then five groups of three terminal integrated voltage stabilizing circuits are respectively provided. The three terminal integrated voltage regulator IC: 1: IC = LM317, 2 = IC: IC = 3: 4: IC = 5 = LM7824. So by the five sets of integrated circuit voltage regulator to get a set of 1.25V37V continuous adjustable four 24V the same DC voltage, the five sets of DC voltage regulator in order to add up to form a 1.25130V from continuous adjustable DC power supply.
【技术实现步骤摘要】
本技术是一种把220V交流电压转变为1.25V－130V范围内连续可调的新型直流稳压电源。特别适用于家用电器的维修和科学实验工作。现在使用的WXDY－88A，89B型彩电／黑白电视机维修电源是从低压1.5V－24V，高压70V－130V可调。该产品是河南省偃师县四方电器厂生产，见《家电维修》1990年第8期封面广告。其中的24V－70V之间的直流电压没有输出，使用中受到局限。为了克服上述不足增加稳压电源的使用范围，我选用了三端集成稳压器，设计出新颖的连续可调直流稳压电源。本技术的目的就是提供一种能够连续可调的直流稳压电源，其结构简单、工作可靠、使用方便。详细说明参见说明书附图。本技术是由电源变压器T；五组整流滤波电路QL1－QL5(3A50V全桥×5)，C1－C6(C1＝4700μF／50V、C2＝0.3μF／50V、C3－C6＝2200μF／50V×4)；一组三端可调稳压器IC1(LM317)；四组相同的三端固定稳压器IC2－IC5(LM7824)；慢起动电路BG(3CG23)，C12(25μF／25V)，R2(2K)，R3(50K)和保护元件R4(10K)，D1－D6(1N4001×6)组成。电源变压器选用100－120W，初级额定电压为220V，次级分别抽出五组27V相同的绕组1－5。将1－5组27V交流电压分别整流滤波后供给五组三端集成稳压电路IC1－IC5的输入端。由IC1＝LM317可知，电路A端对地电压是1.25V－37V连续可调。又由IC2＝IC3＝IC4＝IC5＝LM7824可知，电路B端对A端，C端对B端，D端对C端，E端对D端的...
【技术保护点】
一种从１．２５Ｖ－１３０Ｖ连续可调的直流稳压电源，其特征是由变压器Ｔ，五组整流滤波电路，ＱＬ１－ＱＬ５、Ｃ１－Ｃ６，一组三端可调集成稳压器ＩＣ１＝ＬＭ３１７，四组三端固定集成稳压器ＩＣ２－ＩＣ５（ＩＣ２＝ＩＣ３＝ＩＣ４＝ＩＣ５＝ＬＭ７８２４），慢起动电路ＢＧ＝３ＣＧ２３，Ｃ１２＝２５μＦ／２５Ｖ，Ｒ２，Ｒ３和保护元件Ｒ４，Ｄ１－Ｄ６组成。
【技术特征摘要】
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