Short Title:Electrical Machines
Full Title:Electrical Machines
Language of Instruction:English
Module Code:ELMH H2002
 
Credits: 5
NFQ Level:6
Field of Study:Electricity and energy
Module Delivered in 2 programme(s)
Reviewed By:JAMES WRIGHT
Module Author:JAMES WRIGHT
Module Description:This module aims to familiarise the student with the operating characteristics of common electrical components and devices. The student will be able to analyse the performance of, and select and specify a range of motors, generators, drives and associated equipment.
Learning Outcomes
On successful completion of this module the learner will be able to:
LO1 Understand the basic laws of electromagnetism and use them to explain the operation of electrical machines and analyse magnetic circuits.
LO2 Derive and analyse the equivalent circuit of a power transformer.
LO3 Analyse and describe the construction, operation and characteristics of typical electrical generators such as DC generators, synchronous generators and induction generators.
LO4 Analyse and describe the construction, operation and characteristics of typical electrical motors such as single and three-phase induction motors, synchronous motors and dc motors.
LO5 Explain the construction and operation of variable speed drives and understand the energy savings achievable with their use.
LO6 Perform experiments on electrical machines and write a technical report based on the results.
Pre-requisite learning
Co-requisite Modules
No Co-requisite modules listed
 

Module Content & Assessment

Content (The percentage workload breakdown is inidcative and subject to change) %
Transformers
Magnetism and magnetic circuits. Faradays Law. Transformer principles. Magnetising current, iron and copper losses. Leakage reactance. Equivalent circuit. Phasor diagrams of unloaded and loaded transformers.
15.00%
DC Machines
Faradays Law. Flemmings left and right hand rule. Lenz's Law. Construction and operation of DC machines. Generating and motoring modes of operation. Series, shunt and compound configurations. Lap and wave windings. Equation for generated emf. Torque, speed, current and efficiency analysis.
30.00%
AC Motors
Construction and operation of three-phase and single phase induction motors. Cage rotor and wound rotors. Rotating magnetic fields. Synchronous speed, slip and rotor speed. Torque, speed, current and efficiency analysis. Torque/speed characteristic curve. Equivalent circuit.
20.00%
AC Electrical Generators
Construction and operation of synchronous machines. Generating and motoring modes of operation. Salient pole and cylindrical rotor types. Output voltage and frequency. Equivalent circuit of synchronous machine. Operation of induction generators.
20.00%
Variable Speed Drives
Construction and operation. Applications for energy reduction.
15.00%
Assessment Breakdown%
Course Work40.00%
End of Module Formal Examination60.00%
Course Work
Assessment Type Assessment Description Outcome addressed % of total Assessment Date
Laboratory Measure the open circuit and load characteristic curves of shunt and series DC generators. 3,6 8.00 Week 2
Laboratory Measure the torque/speed curves of shunt and series DC motors and compare their characteristics. 6 8.00 Week 4
Laboratory Measure torque speed curve of an induction machine and analyse its performance using voltage and current measurements. 6 8.00 Week 6
Laboratory Investigate the relationship between the output voltage and the output power of a three-phase alternator supplying a balanced three-phase resistive load. 3,6 8.00 Week 8
Practical/Skills Evaluation Wire and test a small invertor drive/induction motor system. 5,6 8.00 Week 10
End of Module Formal Examination
Assessment Type Assessment Description Outcome addressed % of total Assessment Date
Formal Exam End-of-Semester Final Examination 1,2,3,4,5 60.00 End-of-Semester

IT Tallaght reserves the right to alter the nature and timings of assessment

 

Module Workload

Workload: Full Time
Workload Type Workload Description Hours Frequency Average Weekly Learner Workload
Lecture Classwork 2.00 Every Week 2.00
Laboratories Practical Laboratory Work 2.00 Every Week 2.00
Independent Learning Time Outside of class 3.00 Every Week 3.00
Total Weekly Learner Workload 7.00
Total Weekly Contact Hours 4.00
Workload: Part Time
Workload Type Workload Description Hours Frequency Average Weekly Learner Workload
Lecture Classwork 2.00 Every Week 2.00
Lab Practical Laboratory Work 2.00 Every Week 2.00
Independent Learning Time Outside of class 3.00 Every Week 3.00
Total Weekly Learner Workload 7.00
Total Weekly Contact Hours 4.00
 

Module Resources

Recommended Book Resources
  • Theodore Wildi 2006, Electrical machines, drives, and power systems, 6th Ed., Pearson Prentice Hall Upper Saddle River, New Jersey [ISBN: 978-0131969186]
  • Austin Hughes 2006, Electric motors and drives, 6th ed Ed., Newnes Oxford [ISBN: 9780750647182]
  • Thomas Floyd, Principles of electric circuits [ISBN: 978-0132453127]
This module does not have any article/paper resources
This module does not have any other resources
 

Module Delivered in

Programme Code Programme Semester Delivery
TA_EAEEE_B Bachelor of Engineering (Honours) in Sustainable Energy Engineering 3 Mandatory
TA_EAEEE_D Bachelor of Engineering in Sustainable Energy & Environmental Engineering 3 Mandatory