Multisim Simulation Design of DC adjustable regulated power supply of LM317 (with simulation + paper + reference)

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The design requirements
1、 The output voltage is at 1.25V~37V Adjustable ;
2、 The maximum output current is 1.5A;
3、 The voltage adjustment accuracy is up to 0.1%;

Abstract
The DC regulated power supply is controlled by the power converter 、 Bridge rectifier filter circuit and voltage stabilizing circuit . The transformer will operate at power frequency 50Hz 220V The AC household power supply is changed into low-voltage AC power supply , Then the rectifier circuit is used to change the AC voltage into unidirectional pulsating DC voltage , Filter the AC component in the pulsating DC through the filter circuit . The voltage stabilizing circuit keeps the output stable DC voltage . This design mainly adopts DC voltage stabilizing circuit to form an integrated voltage stabilizing circuit , Through voltage transformation , rectification , wave filtering , The voltage stabilization process will 220V Alternating current (ac) , Change to a stable DC voltage , And realize that the voltage can be in 1.25V-37V Adjustable , The whole design consists of Multisim Simulation Implementation .

Analysis of simulation results
The design content is detailed , cover Introduction and analysis of voltage stabilizing circuit 、 Calculation and setting of transformer parameters 、 Calculation and selection of resistance 、 Protection circuit analysis 、 Analysis of simulation results The content such as . Let you know the design process of DC adjustable regulated power supply at a glance .

（1）220V、50Hz The result of the effective value of the voltage of single-phase power frequency alternating current after being depressurized by the power transformer is ：21.4V, As shown in the figure .

（2） rectification 、 The voltage entering the voltage stabilizing circuit after filtering is ：39.1V , The simulation results are as follows .

（3） The voltage regulation range of adjustable DC voltage stabilization is ： 1.26V~37V, Meet the design requirements .


The shared content includes
（1） DC adjustable regulated power supply complete version document 【Multisim edition 】
（2）Multisim Simulation file
（3） Related references

The screenshot of resources is as follows


Resource acquisition method
Resource acquisition method
Resource acquisition method
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Because this design is the author's original design ,
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