Power electronics
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Power electronics has evolved significantly over time. Early technologies like mercury arc rectifiers were used to provide DC power from kilowatts to megawatts at voltages from 110V to 30KV. Important developments include the thyristor or silicon controlled rectifier introduced by General Electric in 1958. Power electronics devices are now rated for several hundreds of volts and amps compared to signal level devices that work at few volts and milliamps. Power electronics combines power engineering, control systems, and analog electronics to regulate electrical energy. It includes five main circuit types: rectifiers to convert AC to DC, choppers to vary DC levels, inverters to convert DC to variable AC, voltage regulators to vary AC levels, and cyclo
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This document provides an overview of fundamentals of alternating current (AC) circuits. It discusses the history of AC power development by pioneers like Stanley and Tesla. It defines AC as electricity that flows first in one direction and then the other, in contrast to direct current. The key advantage of AC is that it can be transformed between voltages using transformers, allowing efficient power transmission over long distances. Common AC waveform is sinusoidal, starting at zero and alternating between positive and negative peaks. Components like resistors, capacitors, and inductors interact differently with AC than DC.Ad
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Power electronics
- 2. MODULE 1 ? Introduction to power electronics ? Technologies existed before Power electronics ? History of Power electronics ? Applications ? What is power electronics
- 3. Mercury arc rectifiers (also known as Cooper-Hewitt or Hewittic rectifiers) were extensively used to provide DC in high power applications, powers ranging from kilowatts up to a few megawatts, at voltages ranging from 110V to 30KV.Their operation is based on the discovery that an arc between a pool of mercury and a metal anode only allows current to pass in one direction.
- 4. History of power Electronics ? Thyristors or silicon controlled rectifiers (SCR) by General Electric Co. in 1958. ? After SCR, a great many power electronic devices have emerged like GTO, IGBT, SIT, MCT, TRIAC, DIAC, IEGT, IGCT and so on ? These devices are rated for several hundreds of volt and ampere unlike the signal level devices which work at few volts and mill amperes.
- 5. What is Power Electronics: Power Electronics Power engineering Control systems Analog Electronics to get regulated electrical energy
- 8. ? Majorly there are five types of power electronic circuits, each having different purpose- ? Rectifiers – converts fixed AC to variable DC (such as half wave rectifiers or full wave rectifiers) ? Choppers – converts fixed DC to variable DC ? Inverters – converts DC to AC having variable amplitude and variable frequency ? Voltage Regulators – converts fixed AC to variable AC at same input frequency ? Cycloconverters – converts fixed AC to AC with variable frequency
- 9. Applications of Power electronics
- 10. Scope of PE based on Power usage