design requirements

1, and the output voltage is adjustable from1.25v to 37V;

2. Maximum output current1.5a; ;

3. The voltage regulation accuracy reaches 0.65438 0%;

abstract

DC regulated power supply is composed of power converter, bridge rectifier filter circuit and regulated circuit. The transformer changes the AC household power supply with a power frequency of 50 Hz and 220 V into a low-voltage AC power supply, and then changes the AC voltage into a unidirectional pulsating DC voltage through a rectifier circuit, and filters out the AC component in the pulsating DC through a filter circuit. The voltage stabilizing circuit keeps the output at a stable DC voltage. This design mainly adopts DC voltage stabilization to form an integrated voltage stabilization circuit. Through transformation, rectification, filtering, voltage stabilization and other processes, the 220V alternating current is changed into a stable DC voltage, and the voltage can be adjusted to 37V in the range of1.25v-37V..

Simulation result analysis

This design is detailed, including the introduction and analysis of voltage stabilizing circuit, the calculation and setting of transformer parameters, the calculation and selection of resistance, the analysis of protection circuit and the analysis of simulation results. Let you know the design process of DC adjustable and regulated power supply at a glance.

(1) The effective voltage of 220v and 50Hz single-phase power frequency alternating current after being stepped down by the power transformer is 2 1.4V, as shown in the figure.

(2) The voltage entering the voltage stabilizing circuit after rectification and filtering is 39. 1V, and the simulation results are as follows.

(3) The voltage regulating range of adjustable DC voltage regulator is 1.26V~37V, which meets the design requirements.

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(1)DC adjustable regulated power supply Multisim full version document

(2)Multisim simulation file

(3) Relevant reference materials

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