History of VFD/VSD- Variable frequency drive / Explained in Tamil....
VFDs are used in applications ranging from small appliances to large compressors.[6] Systems using VFDs can be more efficient than hydraulic systems, such as in systems with pumps and damper control for fans.[7]
Since the 1980s, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software
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