Basic Electrical Engineering
1001065 modules · 37 topics
Module 1Electrical fundamentals and DC Circuits (8 hrs)7 topics
- Concept of Charge, Current, Voltage, Resistance, Inductance and Capacitance, EMF
- Ohm's Law and Kirchhoff's Current and Voltage Laws
- Effect of Temperature on Resistance
- Resistor, Inductor & Capacitor: Properties and Applications
- Series, parallel and series parallel resistor circuits
- Current and Voltage Divider Rules
- Star-Delta and Delta-star transformations
Module 2AC Circuits (10 hrs)10 topics
- Generation of sinusoidal EMF; Peak, RMS, average values; form factor; Wave and phasor representation
- Impedance of R, L, C circuits; RL, RC, RLC series and parallel circuits; series and parallel resonance
- Power in AC circuits: Active, reactive, apparent power
- Power factor - Unity, lag, lead, Power factor improvement, advantages
- Harmonics, source and its impact
- Three-phase systems, concept need and advantages
- Single Phase vs Three Phase System (Advantages), Phase sequence
- Balanced and unbalanced supply and load and line-phase relationships
- Voltage, Current relationship and power in Star and Delta connections
- Power in balanced three phase circuits
Module 3Magnetic Circuits and Electromagnetic Induction (10 hrs)11 topics
- Magnetic circuits - Magnetic Flux, Magnetic intensity, Flux Density(B), Magnetomotive Force (MMF)
- Reluctance, Permeability, simple numerical
- Analogy between Electric and Magnetic circuits
- Basic Properties of Magnetic materials
- Magnetic Circuits with DC Excitation
- Magnetic Leakage
- B-H Curve
- Hysteresis and Eddy Current Losses
- Magnetic Circuit Calculations
- Electromagnetic induction - Faradays Laws, Fleming's right hand and left-hand Rules
- Statically and dynamically induced EMF; Concepts of self-inductance, mutual inductance and coefficient of coupling; Energy stored in magnetic fields
Module 4Transformer (8 hrs)5 topics
- Transformer - Construction, principle of operation, Single phase v/s three phase transformer
- Emf equation
- Transformer performance - Load test - Voltage regulation, losses and efficiency
- Single phase v/s 3 phase transformer and its uses
- Special purpose transformers - Audio, RF, IF, Pulse, Isolation, Impedance matching transformers - Introduction and applications
Module 5Electrical and Special Purpose Machines (6 hrs)4 topics
- DC machines: construction, EMF equation, types of DC Motor and applications, need of DC motor starter
- AC machines: Three-phase induction motor construction, working, types, slip, need of starter, DOL, star-delta starter
- Construction, working principle of single-phase induction motors, Starting methods
- Construction, working and applications of BLDC motor, Servo motor, Stepper motor, Switched Reluctance motor, Universal motor, Coreless motor
Theory