MC-525 Electrical Machines & Power Electronics


Credit Hours = 3


  • Electrical Machines: Design of transformers, DC machines, Single phase and three phase induction motors, Design of synchronous machines.
  • Power Electronics: Introduction and Scope, Solid State Devices used as switches in power electronics, power diodes, power transistors, Power MOSFETS, Thyristors, Triacs, Diac, Characteristics of Gate Turn-off Thyristor (GTO), and Reverse Conducting Thyristors (RCT). Series and parallel operation of SCR, LASCR, Thyristor turn on, Integral cycle control and phase angle control, Elementary and advanced firing schemes, Sequence and close loop control. Thyristor Commutation: Self commutation, Impulse commutation, Series capacitor commutation, Parallel capacitor commutation.
  • Uncontrolled and Controlled Rectifier: Single phase, three phase, Semi converter, Full converter, Dual converter, Analysis and performance, Parameters as harmonic factor, Utilization factor, Power factor, Distortion factor, Rectifiers with purely resistive, Highly inductive and RL loads, AC Voltage Controllers. DC Chopper: Principle, Step-up and Step-down operation, Buck regulator, boost regulator, Buck-boost regulator, Cuk regulator, Choppers using Thyristors.
  • Inverters: Principles, Half bridge and Full bridge inverters, Constant, Variable and Sinusoidal PW modulation, Modified Sinusoidal Pulse Width Modulation (SPWM); Protection Analysis: Over-voltage, Over-current, di/dt and dv/dt protection, Heat sinks; Electronic Power Supplies: Design and analysis of regulated Power supplies, Switch mode power supplies and Uninterrupted Power supplies.


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