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To understand How DC Motor Works? is to understand why shaft start rotating when motor supplied by DC voltage. Its required to understand exact relation between electricity, magnetism and mechanics. DC Motor Course Intro To know more about fundamentals of DC Motor, go through the self-paced online course "Fundamentals of DC Motor". To read free descriptive question answers on how different electric motor works, go to the 3D E-library and explore the 3D flip book eBook "Principle of Electric Motors" for free.

Here I would like to add few basic detail about this. Inverter converts fix DC voltage in to equivalent sinusoidal waveform noticeably by performance. Main idea behind this conversion is fact that sine wave has higher magnitude at its center (90 degree) and its reducing as go far from center both side (toward 0 degree and 180 degree). Thus supplying dc voltage of varying width such that it has high width around center and smaller at far from center resembles sine shape. This DC voltage can be switched from either from 0 to Vdc or from Vdc to –Vdc to produce same effect which call unipolar and bipolar technique respectively. Name unipolar is given as switched DC voltage applied to the load remain positive during positive cycle and negative during negative cycle. While in bilopar method this voltage switches in both the direction throughout the cycle. Thus bipolar method produces twice the voltage stress on load than maximum AC voltage that can be produce by the inverter. Thus unipoar method is more preferable.