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EC-604 (C) POWER ELECTRONICS Notes

5 notes for POWER ELECTRONICS, unit by unit.

Unit 1 · Short notes Power Semiconductor Switches Power diodes – basic structure and V‑I characteristics; various types · DIACs – basic structure and V‑I characteristics · TRIACs – basic structure and V‑I characteristics · Power BJT – construction and working principle, quasaturation, primary breakdown, secondary breakdown · IGBTs – basic structure and V‑I characteristics · Power MOSFETs – basic structure and V‑I characteristics
Unit 2 · Short notes Rectifiers Thyristor series and parallel operation; methods of turning off; commutation circuits · Line‑frequency phase‑controlled rectifiers using SCR · Single‑phase rectifiers – half‑wave rectifier with R and RL loads; full‑wave half‑controlled and fully controlled converters with continuous and constant currents; input‑side harmonics and power factor; effect of source inductance · Three‑phase rectifiers – half‑wave rectifier with R and RL loads; full‑wave fully controlled converters with continuous and constant currents
Unit 3 · Short notes Inverters & Cycloconverters Single‑phase series, parallel and bridge inverters · Single‑phase PWM inverters – basic circuit and operation · Single‑phase series resonant inverter · Single‑phase bridge inverter · Three‑phase bridge inverter · Voltage control of inverters
Unit 4 · Short notes AC Voltage Controllers Principle of ON‑OFF and phase control · Single‑phase AC voltage controller with resistive and inductive loads · Three‑phase AC voltage controllers – various configurations and comparison · Single‑phase transformer tap changer · Cycloconverters – basic principle of operation; single‑phase to single‑phase; three‑phase to single‑phase; three‑phase to three‑phase; output voltage equation
Unit 5 · Short notes DC – DC Converters Choppers – principle of operation; step‑up and step‑down choppers · Switching regulators – buck regulators; boost regulators; buck‑boost regulators · Switched‑mode power supply – principle of operation and analysis

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