Power electronics has recently emerged as a complex and multidisciplinary technology after the last several decades of technology evolution made possible by the relentless efforts of so many university scientists and engineers in the industry. From current trends, it is evident that power electronics will play a significant role in solving our climate change (or global warming) problems, which are so important. It has emerged as the high-tech frontier in power engineering. Power electronics is ushering in a new kind of industrial revolution because of its important role in energy conservation, renewable energy systems, bulk utility energy storage, and electric and hybrid vehicles, in addition to its traditional roles in industrial automation and high-efficiency energy systems. We can define the 21st century as the golden age of power electronics applications after the technology evolution stabilized in the latter part of the past century with major innovations. These include as dc and ac power supplies, electrochemical processes, heating and lighting control, electronic welding, power line volt–ampere reactive (VAR) and harmonic compensators, high-voltage dc (HVdc) systems, flexible ac transmission systems, photovoltaic and fuel cell power conversion, high-frequency (HF) heating, and motor drives. Power electronics is a technology that deals with the conversion and control of electrical power with high-efficiency switching mode electronic devices for a wide range of applications. More information is available in the references. The history of power electronics is so vast that it is impossible to review it within a few pages. It is important to note, however, that inventions are generally developed by a number of contributors working over a period of time. Wherever possible it gives the name of the inventor and the year of invention for important technologies. It includes electrical machines, mercury-arc rectifiers, gas tube electronics, MAs, power semiconductor devices, converter circuits, and motor drives. This article gives a brief historical review of the evolution of power electronics over the past 100-plus years. 6 Power Electronics in the Modern Era: Power Semiconductor Devices.5 Power Electronics in the Classical Era: Magnetic Amplifiers.4 Power Electronics in the Classical Era: Hot-Cathode Gas Tube Rectifiers.3 Power Electronics in the Classical Era: Mercury-Arc Rectifiers.
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