History
Power electronics started with the development of mercury arc rectifier. Invented by Peter Cooper Hewitt in 1902, the mercury arc rectifier was used to convert alternating current (AC) into direct current (DC). From the 1920's on, research continued on applying thyratrons and grid-controlled mercury arc valves to power transmission. It was not until Uno Lamm developed a valve with grading electrodes that mercury valves were usable for high voltage direct current transmission. In 1933 selenium rectifiers were invented.
In 1947 the bipolar point-contact transistor was invented by Walter H. Brattain and John Bardeen under the direction of William Shockley at the Bell Telephone Laboratory. In 1948 the invention of the bipolar junction transistor by Shockley improved the stability and performance of transistors, and reduced the cost of manufacture. By the 1950s, semiconductor power diodes became available and started replacing vacuum tubes. Then in 1956 the Silicon Controlled Rectifier (SCR) was introduced by General Electric, greatly increasing the range of power electronics applications.
In the 1960s the switching speed of BJTs allowed for high frequency DC/DC converters. In 1976 power MOSFET becomes commercially available. In 1982 the Insulated Gate Bipolar Transistor (IGBT) was introduced.
Read more about this topic: Power Electronics
Famous quotes containing the word history:
“History does nothing; it does not possess immense riches, it does not fight battles. It is men, real, living, who do all this.... It is not “history” which uses men as a means of achieving—as if it were an individual person—its own ends. History is nothing but the activity of men in pursuit of their ends.”
—Karl Marx (1818–1883)
“Indeed, the Englishman’s history of New England commences only when it ceases to be New France.”
—Henry David Thoreau (1817–1862)
“For a transitory enchanted moment man must have held his breath in the presence of this continent, compelled into an aesthetic contemplation he neither understood nor desired, face to face for the last time in history with something commensurate to his capacity for wonder.”
—F. Scott Fitzgerald (1896–1940)