PROJECT TITLE :

A Power Quality Improved Bridgeless Converter Based Computer Power Supply - 2016

ABSTRACT:

Poor power quality, slow dynamic response, high device stress, harmonic rich, periodically dense, peaky, distorted input current are the foremost issues that are frequently encountered in standard switched mode power supplies (SMPSs) used in computers. To mitigate these problems, it's proposed here to use a nonisolated bridgeless buck-boost single-ended primary inductance converter (SEPIC) in discontinuous conduction mode at the front finish of an SMPS. The bridgeless SEPIC at the front end provides stiffly regulated output dc voltage even beneath frequent input voltage and load variations. The output of the front end converter is connected to a [*fr1]-bridge dc-dc converter for isolation and additionally for obtaining completely different dc voltage levels at the load end that are required in an exceedingly personal laptop. Controlling one output voltage is able to manage all the other dc output voltages as well. The design and simulation of the proposed power supply are allotted for getting an improved power quality that's verified through the experimental results.