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This section shows main aspects of the module ELB044 ElectroTechnology

### Aims

The aims of this module is:

To introduce to the students of other disciplines the fundamental principles and concepts of electrotechnology.

### Intended Learning Outcomes

At the end of the module the students should be able to:
(1) Knowledge and Understanding
Use the fundamental laws and theorems for circuit analysis. Learn how the laws of electromagnetism are
applied to the design of induction motors, synchronous generators and transformers and understand the
electromechanical power conversion process.
(2) Skills and Attributes
(i) Intellectual
Analyse ac and dc electrical circuits and predict their performance. Understand and apply the fundamental
laws of electromagnetism to different types of electrical machines, and be able to predict their performance in
real life situations.
(ii) Practical
Determine the equivalent circuit parameters and the performance of a single phase transformer in the
laboratory. Compare the theoretical and practical results under load conditions and build confidence in the
understanding of, and the application of theory to practice. Work safety by taking adequate precautions when
testing power equipment under laboratory conditions.
(iii) Transferable
Analyse complex electrical circuits in logical steps and apply the fundamental laws of electrical circuit
analysis and electromagnetism, to other problems (systems, networks etc.). Write technical reports.

### Content

DC CIRCUITS - Circuit elements. Ohm's law, Kirchhoff's laws, Thevenin's and Norton's theorems, mesh and nodal analysis. Energy storage and power dissipation/transfer.

AC CIRCUITS - Sinusoidal excitation, peak and r.m.s. values, phasors. Reactances and impedance. Applications of circuit theorems to AC circuits. Real power, reactive power and volt amps. 3 phase fundamentals.

ELECTRICAL MACHINES FUNDAMENTALS - Ampere's and Faraday's laws. Magnetic circuit analysis. Eddycurrent and hysteresis losses in ferromagnetic materials. Transformers. DC machines (motor and generator). Induction motors. Synchronous generators.

### Teaching and Learning

 Activity  Type Hours Comments Practical Classes and workshop 4 Tutorial 12 Lecture 24 Guided independent study 60 TOTAL 100
Total student effort for the module: 100 hours on average.

Twenty two lectures and eleven tutorials. 4 hours of laboratory classes.

Remaining 60 hours are for self study, writing coursework and revision for examinations.

### Assessment

 Assessment Type Weigth Exam Length Coursework 20% Exam 80% 2h TOTAL 100
One two-hour written examination (80%), laboratory report (20%).

WARNES, L. A. A. (Lionel A. A.)., 1998. Electronic and electrical  engineering:[principles and practice]. Macmillan.

### Lecture Plan - TEACHING MATERIAL-

LECTURE 1: Electrical Current, Voltage, Resistance, Resistivity, Temperature Coefficient of Resistance etc.

LECTURE 2: Ohm's law, Kirchoff's Laws, Circuit elements R, L, C, V, I. definition of nodes, branches and meshes.

LECTURE 3: Equivalent values of R, L, C when connected in series and parallel.

LECTURE 4: Power dissipated in R energy stored in L and C.

LECTURE 5: Transient and Steady-State analysis of DC circuits with R, L, and C.

LECTURE 6: Thevenin's equivalent circuit (TEC.)

LECTURE 7: Norton's equivalent circuit (NEC).

LECTURE 8: Power calculation in relation to TEC and NEC.

LECTURE 9: Maximum Power Transfer in DC circuits

LECTURE 10: AC fundamentals, definition of reactances and impedance.

LECTURE 11: ac resonant circuits, variation of impedance with frequency etc.

LECTURE 12: Maximum power transfer in AC circuits

LECTURE 13: Mesh and nodal analysis of DC and AC circuits

LECTURE 14: Faraday's Law Of Electromagnetic Induction, Single Phase Transformer, Voltage and MMF Equations, And The Equivalent Circuit of a Practical Transformer.

LECTURE 15: Eddy current and Hysteresis losses in AC and machines  including transformers.

LECTURE 16: Magnetic circuit analysis, energy and forces in magnetic  circuits.

LECTURE 17: Single phase generator

LECTURE 20 DC machines

LECTURE 19: Rotating magnetic field and principles of operation of induction motors.

LECTURE 20: Induction motor torque/speed characteristics and torque control in slip ring induction motors.

LECTURE 21: Revision

LECTURE 22: Solution of a past exam paper    