Power modules

From the very early days when power electronics equipment utilized vacuum tubes, power engineers have been concerned with energy efficiency, power optimization and how to make power supplies more reliable, smaller and smarter. Probably few of us remember the introduction of the Thyratron or the 1925 patent by Julius Edgar Lilienfeld for the Field Effect Transistor (picture 01 – picture 02), but the electronics industry is full of amazing inventions and innovations all contributing to achieving the mythical 99% efficiency level.