Magnetic circuits and magnetic materials; single phase and three phase transformers; real and reactive power, electromagnetic energy conversion principles; principle of rotating electric machines. DC machines, steady-state behaviour and speed control.
Power Semiconductor Devices; AC to DC converters; DC to DC switch-mode converts. Rotating mmf waves in AC machines, synchronous machines, principles of operation and equivalent circuit, steady-state behaviour; real and reactive power; induction motors - rotating mmf, basic principles of operation, equivalent circuit, torque-speed characteristics. DC to AC inverters; induction motor drives - speed control by varying stator frequency and voltage; variable reluctance and stepper-motor drives; synchronous servomotor drives.