Study of battery charger's efficiency and its improvement

This paper presents an analysis of different battery chargers or power supplies in the market and its efficiencies. The study involves the usage of power supplies from different companies that exists in Malaysia either from the phone's manufacturer or fake charger that is sold in market. This analysis is to determine the reliability and the effectiveness of the normal type of power supply AC adapter used in daily life in Malaysia. Since most of the power supply is a switched mode power supply, the second part of this paper will illustrate on how to improve its efficiency (power factor and harmonic distortion). Efficiencies here are related to voltage, current, power factor, and total harmonic distortion. However, this paper is only specified in the study of active power filter to minimize the harmonic distortion and its power factor. Active filter is famous in harmonics mitigation as well as reactive power compensation, voltage regulation, load-balancing and load balancing. The results of Total Harmonic Distortion and Power Factor and its operation were examined with MATLAB.