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D.C. Machines : Principles and Construction Introduction to DC Machines Construction of a DC machine E.M.F. Equation Working principle as a Generator or as a Motor Types of Armature winding Lap winding and Wave winding (concept of simplex, duplex & multiplex winding) Magnetization curve of DC machines Torque Losses & efficiency of DC machines   … Read more

Semi Conductors

Single Phase Motors Introduction Classification Construction Principle of Operation Performance characteristics Applications Repulsion start induction run motor Capacitor start & capacitor run Two-value capacitor Shaded pole motors   Single Phase Synchronous Motors Reluctance Hysteresis Universal Motor Stepper Motor Servo Motor Brush less DC Motor ( BLDC )

Illumination Source of Light Halogen Lamp Discharge Lamp like mercury vapor Sodium vapor lamp Neon lamp LED Xenon lamps Flood lighting Industrial Lighting Automobile Electrical Systems Electrical components used for 2 wheeler and 4 wheeler Batteries Magnetos Contact Breaker Ignition coils Cut Outs Voltage and Current regulators spark plug Various types of lamps Alternator and … Read more

Synchronous Machines: Introduction Construction Relation between Poles, Speed and Frequency Principles of Working of Synchronous Machine E. M. F. Equation Distributed Winding Stator Winding Fractional slot winding Armature Reaction Synchronous Impedance of Synchronous Machine Determination of Synchronous Impedance Armature Winding of 3 Phase Machines Pitch factor Distribution factor Synchronous reactance and phasor diagram of Alternator … Read more

Basic Principles

Classification of Transformer According to Core type Core Type Shell Type Berry Type According to the purpose for which used Distribution Transformer Power Transformer Generators formers ( Current Transformer & Potential Transformer ) According to method of cooling Self cooled Air force cooled Oil self cooled Forcely oil cooled with air or water According to … Read more