Module overview
- To introduce the students to fundamental concepts and principles of operation of various types of electrical machines.
- To equip students with basic experimental and modelling skills for handling problems associated with electrical machines.
- To give students an appreciation of design and operational problems in the electrical power industry.
- To introduce the students to modern CAD environment in relation to design of electromechanical devices.
- To increase the students’ confidence in using numerical techniques of solving large system of equations arising in modelling and simulation of electromechanical devices
Aims and Objectives
Learning Outcomes
Knowledge and Understanding
Having successfully completed this module, you will be able to demonstrate knowledge and understanding of:
- Theory of electromechanical energy conversion, the concepts of fundamental torque equation and rotating and oscillating fields
- Construction and design issues associated with electrical machines
- The principles of operation of electrical generators and motors; fundamental characteristics of various types of machines
- Fundamentals of modelling, simulation techniques and components of CAD systems for Electromagnetics and Electrical Machines.
Subject Specific Practical Skills
Having successfully completed this module you will be able to:
- Undertake virtual prototyping of electromagnetic devices, by setting up models and solving them via FE software
- Conduct simple experiments on rotating electrical machines and transformers
Transferable and Generic Skills
Having successfully completed this module you will be able to:
- Use electromagnetic CAD packages and write a technical report
Subject Specific Intellectual and Research Skills
Having successfully completed this module you will be able to:
- Apply equivalent circuits to performance prediction, interpret results and correlate them with theoretical predictions
- Tackle problems of analysis of performance and explain the shape of characteristics of actual machines
Syllabus
3 phase transformers. (4 hours)
- Review of principles of operation, construction, review of equivalent circuit, open-circuit and short-circuit tests, regulation, three-phase connections, parallel operation, auto-transformer, introduction to 3rd harmonic phenomenon and unbalanced loading.
Introduction to rotating machines. (4 hours)
- Underlying concepts and features of rotating machines, fundamental torque equation, rotating field principle, air-gap mmf and permeance, 3-phase windings, winding factors.
Synchronous machines. (4 hours)
- Generated EMF, output equation, armature reaction, phasor diagram, synchronous reactance, equivalent circuit, open and short-circuit characteristics, regulation, load angle, synchronous machine on infinite busbars, effects of saturation, salient-pole machine, synchronising, synchronous motor, V curves, power factor correction.
Polyphase induction motors. (4 hours)
- Basic theory and construction of squirrel-cage and wound-rotor motors, equivalent circuit, measurement of equivalent circuit parameters, analysis of machine equations, speed/torque curves, circle diagram, starting performance, speed control, single-phase induction motor, deep bar effect in squirrel-cage induction motor.
Direct current machine. (4 hours)
- Review of construction, basic equations and steady-state characteristics, windings, field form and armature reaction, commutation and use of interpoles, starting and speed control.
Single-phase ac motors. (1 hour)
- Outline of shaded-pole, universal, permanent magnet, and reluctance machines with applications.
Case Studies: (3 hours)
- Wind turbines
- Electrical and hybrid vehicles
- Maglev and conventional trains
Computing Labs (12 hours)
- The finite element method for virtual prototyping
- Analysis of errors
Laboratories (9 hours)
Learning and Teaching
Type | Hours |
---|---|
Completion of assessment task | 45 |
Specialist Laboratory | 9 |
Revision | 10 |
Lecture | 24 |
Follow-up work | 9 |
Practical classes and workshops | 12 |
Preparation for scheduled sessions | 18 |
Wider reading or practice | 20 |
Total study time | 147 |
Resources & Reading list
Textbooks
K Karsai, D Kereny, L Kiss (1987). Studies in Electrical and Electronic Engineering 25, Large Power Transformers. Elsevier.
Dino Zorbas (1989). Electric Machines, Principles, Applications, and Control Schematics. West Publishing Company.
Hammond P & Sykulski J K (1994). Engineering Electromagnetism - Physical Processes and Computation. Oxford University Press.
Sarma M S (1994). Electric Machines, Steady-state Theory and Dynamic Performance. West Publishing Company.
Denis O'Kelly (1991). Performance and Control of Electrical Machines. Mc-Graw Hill Book Company.
Charles I Hubert (1991). Electric Machines, Theory, Operation, Application, Adjustment and Control. Macmillan Publishing Company.
A E Fitzgerald, Charles Kingsley, Stephen D Umans (2002). Electric Machinery. Mc-Graw-Hill Higher Education.
Stephen J Chapman (2001). Electrical Machinery and Power System Fundamentals. McGraw-Hill Higher Education.
John Hindmarsh (1995). Electrical Machines and their Applications. Butterworth-Heinemann.
K.T. Chau (2015). Electric Vehicle Machines and Drives – Design, Analysis and Application. Wiley.
J. Weidauer, R. Messer (2014). Electrical Drives: Principles, Planning, Applications, Solutions. Publicis Publishing.
Assessment
Summative
This is how we’ll formally assess what you have learned in this module.
Method | Percentage contribution |
---|---|
Examination | 40% |
Coursework | 50% |
Laboratory | 10% |
Referral
This is how we’ll assess you if you don’t meet the criteria to pass this module.
Method | Percentage contribution |
---|---|
Examination | 100% |
Repeat
An internal repeat is where you take all of your modules again, including any you passed. An external repeat is where you only re-take the modules you failed.
Method | Percentage contribution |
---|---|
Examination | 100% |
Repeat Information
Repeat type: Internal & External