Induction motors are used in industrial control systems, as well as in main powered home appliances. Simple and rugged design, low cost, low maintenance and direct connection to an AC power source are the main advantages of induction motors. Various types of induction motors are avalaible in the market.
Different motors are suitable for different applications. Although induction motor are easier to design than DC motors,the speed and the torque control in various types of induction motors require a greater understanding of the design and the characteristics of these motors. This seminar discusses the basics of an induction motor, the different types, their characteristics, the selection criteria for different applications and basic control techniques.
Solar cell in other words called photovoltaic cell is the cell that generates electricity when light falls on it. As the word implies, photo means light, while voltaic means electricity. By the series and parallel electrically connection of these cells, a useful level of voltage and current can be achieved. When light falls on these cells, a certain portion of it is absorbed within the semi-conductor materials (cells).
The energy of the absorbed light mobilizes the electrons. The inbuilt electric field in the cells which is as a result of the doping method in the cells i.e the existence of holes and electrons in the cells, then causes the electrons to flow in a certain direction which is current in ampere. And by placing a metal contact on the top bottom of the cells the current together with voltage is drawn which can be used externally.
This project explains how solar cell can be formed using semi-conductor, say silicon type of solar cell which has terminal voltage of about 0.6v.
The chapter one gives a brief overview of what a semi-conductor material is, its conductivity and how it forms a solar cell (introductory part).
Chapter two treats the literature review of the write-up. It gives the history of solar cell technology.
Chapter three and four treats the main body of the write-up it explains how photovoltaic modules are made to achieve a useful level of voltage and current, the characteristics of a semi-conductor and their doping methods.
Chapter five is the conclusion/summary part of this work. The overview of advantages and disadvantages of solar cell module are treated.