Power electronics
Power electronics is engineering that deals with power conversion and power switching using power semiconductor devices. In broad terms, it can be said that it is the technology of the entire application system centered on power conversion and control. In 1957, after the emergence of thyristors developed by General Electric in the United States, power conversion and power switching technology developed by semiconductor devices developed, unlike conventional rotary machines, magnetic, liquid, and gas. In 1969, H. F. Storm of General Electric came to the conclusion that the use of the term solid-state power electronics in the IEEE magazine's "Spectrum" article was power electronics. Typical examples include semiconductor power conversion devices such as rectifiers and inverters. Other examples include electric power fields such as power generation and transmission, industrial fields using rotors, fans, pumps, blowers, power supply devices for communication systems and factories, electric railways such as driving and transforming electric vehicles, It is widely used.