RE: ieee power electronics seminar topic
Power Electronics.ppt (Size: 1.66 MB / Downloads: 142)
Application of Power Electronics
In early days, control of the electric power was achieved with electric machinery.
Power electronics have revolutionized the concept of power control for power conversion and for control of electrical motor drives.
Power electronics combine power, electronics, and control.
Control deals with the steady-state and dynamic characteristics of closed-loop system.
Power deals with static and rotating power equipment.
Electronics deals with the solid-state devices and circuits for signal processing to meet the desired control objectives.
History of Power Electronics
The history of power electronics began with introduction of the mercury arc rectifiers in 1900.
Devices which were based on the mercury arc valve technology were used until 1950.
The first electronic revolution began in 1948 with the invention of the silicon transistor at Bell Labs.
Most of today's advanced electronic technologies are based on the transistor concept.
The next breakthrough was invention of Thyristor (SCR) in 1956, which is a PNPN triggering transistor.
The second revolution began in 1958 with development of the commercial thyristor by GE.
Power Semiconductor Devices
Since the first thyristor was developed in 1957, there have been tremendous advances in the power semiconductor devices.
Until 1970, the conventional thyristors had been exclusively used for power control applications.
Since 1970 many types of power semiconductor devices were developed.