Basic Electrical Engineering (Organizer) - Network Theorems and DC Circuits, AC Circuits, Transformers and Magnetic Circuits, Electrical Machines (DC and AC), Power Converters, Electrical Installation
This Organizer covers concepts and problems related to Basic Electrical Engineering.
The document is organized into chapters covering different topics, each featuring short answer and long answer type questions, many sourced from past WBUT examinations.
Key Topics Covered:
Network Theorems and DC Circuits: Problems and definitions related to Superposition Theorem, Thevenin's Theorem, Norton's Theorem, Maximum Power Transfer Theorem, and basic circuit components and definitions (Linear/Non-linear, Bilateral/Unilateral circuits, Network).
AC Circuits: Derivations and analysis of AC quantities (average and RMS value), single-phase R-L-C series and parallel circuits, resonance, power (True, Reactive, Apparent) and power factor, and three-phase balanced systems. It also includes concepts like phasor diagrams, impedance, and reactance.
Transformers and Magnetic Circuits: Definitions of self-inductance and mutual inductance, energy stored in magnetic fields, the B-H curve and hysteresis loss, Eddy current losses, the EMF equation of a transformer, equivalent circuits, voltage regulation, and conditions for maximum efficiency (Iron loss = Copper loss).
Electrical Machines (DC and AC): Principles of DC machines (motor and generator), EMF equation of a DC generator, back EMF, torque equation for a DC motor, speed control methods (flux and armature control), motor starters, induction motor principles (rotating magnetic field, slip, rotor frequency), and synchronous machine concepts (hunting, distribution factor).
Power Converters: Classification and applications of power converter circuits (AC-DC, DC-AC (Inverter), AC-AC (Cycloconverter), DC-DC (Chopper)), operation of DC choppers (Buck, Boost), time ratio control strategies, and single and three-phase inverters (half-bridge, full-bridge, VSI).
Electrical Installation: Wiring systems (Joint Box/Tee, Loop-in, Cleat, Casing-capping, Batten, Lead Sheathed, Conduit), safety devices (fuses, circuit breakers - MCB, ELCB, RCCB), earthing/grounding (neutral and equipment earthing), and calculation of electricity consumption.
