The document describes a proposed switched mode power supply (SMPS) system that uses a front-end power factor corrected Zeta converter to improve power quality. The front-end converter reduces 100-Hz ripple and improves power factor and voltage regulation. Simulation and testing of a laboratory prototype showed the proposed SMPS enhanced performance under varying input voltages and loading conditions, meeting international power quality standards.

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2. DOCUMENT FORMAT
• Abstract:
• Introduction:
• Literature Survey:
• System Analysis:
• Existing System:
• Disadvantages:
• Proposed System:
• Advantages:
• System Requirements:
• Block Diagram:
• Working Flow Diagram:
• Circuit Diagram:
• Implementation:
• Modules Description:
• System Study:
• System Testing:
• Software Description:
• Sample code:
• Conclusion:
• Future Enhancement:
• References:
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3. POWER FACTOR CORRECTED ZETA CONVERTER
BASED IMPROVED POWER QUALITY SWITCHED
MODE POWER SUPPLY
TITLE
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4. ABSTRACT
Multiple-output Switched Mode Power Supplies (SMPSs) for personal computers (PCs)
normally depict extremely bad power quality indices at the utility interface such as total
harmonic distortion of the input current being more than 80%, power factor being lower than
0.5 and output voltage regulation being very poor. They violate the limits of harmonic
emissions set by international power quality standards. In this paper, a non-isolated power
factor corrected (PFC) converter is being proposed to be used at the front end to improve the
power quality of an SMPS for a PC. The front-end converter is able to reduce the 100-Hz ripple
in its output that is being fed to the second stage isolated converter. The performance of the
front-end Zeta converter is evaluated in three different operating conditions to select the best
operating condition for the proposed SMPS system. The performance of the proposed SMPS is
simulated and a laboratory prototype is developed to validate its performance. Test results are
found to be in line with the simulated performance under varying input voltages and loading
conditions and all the results demonstrate its enhanced performance.
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