International Journal on Recent and Innovation Trends in Computing and Communication ISSN: 2321-8169 Volume: 5 Issue: 6 794 – 796 _______________________________________________________________________________________________ 794 IJRITCC | June 2017, Available @ http://www.ijritcc.org _______________________________________________________________________________________ Design and Development of Power Inverter using Combinational Switches for Improvement of Efficiency at Light Loads Pranoti D. Vaidya Electrical Department AISSM’S IOIT Pune, India Pranotivaidya03@gmail.com Prof. P. P. Mahajan Electrical Department AISSM’S IOIT Pune, India ppmahajan@gmail.com Abstract—For standalone residential power system Inverters are designed using peak load capacity keeping in mind. The efficiency of such inverter on light load is low. The efficiency of inverter can be improved in light load condition using switch combination in inverter. A comparative analysis of using different individual switching and combination devices will be carried out for specific load. A hardware realization of inverter for a specific capacity using most efficient switch combination will be done. Keywords- Microcontroller, MATLAB, Inverter __________________________________________________*****_________________________________________________ I. INTRODUCTION Energy is one of the fundamental demands of the modern society. According to use energy may be of various type likes electrical, thermal, tidal energy etc. But due limitation of conventional source of energy it is required to overcome from these energy sources and make use of nonconventional energy sources. So for this purpose here we use inverter control technique for power supply. At the early stage, sun was the source of energy for generating power. Due to the inadequacy of the power generated through this source, there was a need to find other ways to improve the power supply when the generating station could not meet the demand of the people.As the technology advances, the hydroelectric generation was developed, gas firing generating station, and wired tubing methods of generating power supply were developed. In spite of all these developments, there was still failure in electrical power generation as a result of obsolete equipment at the generating stations.There was still need to find alternative for solving the problem. As a result of this, some options like alternators, inverters and others were developed. The electrical inverter is a high power electronic oscillator. It is so named because early mechanical AC to DC converters was made to work in reverse, and thus was “inverted”, to convert DC to AC. Typically inverters are designed for peak power requirements and optimized for a certain operating point. However, in a stand-alone residential house electrical demand is highly dynamic and stays at low power levels (below 500W) about 20 hours in a day Thus, residential electrical demand characteristics must be taken into account in the inverter design and control stages in stand-alone applications. II. LITERATURE SURVEY The literature survey carried out related to the study of improving efficiency of inverter K. Hoffmann [1] provides simulation and measurement demonstrate that the conducting power losses of power converters can be minimized by the parallel connection of corresponding IGBTs and MOSFETs. For this, four different IGBT-types were analysed together with a super junction MOSFET. Concerning the cost of materials the amount of total silicon was not increased compared to theparallel operation of two MOSFETs.It has been found out that the current sharing between unipolar and bipolarsemiconductor strongly depends on several parameters. The chosen MOSFET and IGBT typesand their conducting characteristics are very important. J. Karst [2] provides the hybrid com-bination of MOSFET and IGBT connected in parallel has been revisited in case of hardswitching. Due to improvements in semiconductor performance concerning both IGBTs and MOSFETs a switching frequency region has been identified in which the usage of the proposed hybrid switch canbe advantageous at no extra cost. M. Soja [3] provides the appropriate design procedures and methods and usage of modern powerful switches in the power and digital components in control part, it is possible to improve the efficiency of power electronics converters. The complete analysis of converter losses allows to understand of their origin and points on possible direction of improving efficiency.