Module Details

Module Code: ELEC6016
Title: Electrical Machines
Long Title: Electrical Machines
NFQ Level: Fundamental
Valid From: Semester 1 - 2020/21 ( September 2020 )
Duration: 1 Semester
Credits: 5
Field of Study: 5220 - Electrical Engineering
Module Delivered in: 2 programme(s)
Module Description: This module develops the underlying energy conversion theory between electrical and mechanical systems by introducing electromechanical energy conversion principles and three-phase systems, transformers, DC, induction, and synchronous machines and the power systems employing these devices.
 
Learning Outcomes
On successful completion of this module the learner will be able to:
# Learning Outcome Description
LO1 Explain the fundamental principles relating to rotating and non rotating machines and the effects of hysteresis, eddy currents and heat loss in electrical machines.
LO2 Describe the construction, application and operation of single phase and three phase transformers. Calculation of power losses in long distance power transmission and the need for transformer to counter act them.
LO3 Appraise electrical supply equipment and be able to make selections from theoretical considerations.
LO4 Analyse and describe aspects of the construction, principle of operation, applications, methods of speed control, and methods of direction reversal of d.c. machines.
LO5 Derive equivalent circuits based on transformer and motor fundamentals, without considering magnetic coupling, and perform short and open circuit tests on transformers in order to establish internal component values.
LO6 Model transformers and motors within Simulink/Simscape to validate the theory delivered in lectures.
Dependencies
Module Recommendations

This is prior learning (or a practical skill) that is strongly recommended before enrolment in this module. You may enrol in this module if you have not acquired the recommended learning but you will have considerable difficulty in passing (i.e. achieving the learning outcomes of) the module. While the prior learning is expressed as named MTU module(s) it also allows for learning (in another module or modules) which is equivalent to the learning specified in the named module(s).
Incompatible Modules
These are modules which have learning outcomes that are too similar to the learning outcomes of this module. You may not earn additional credit for the same learning and therefore you may not enrol in this module if you have successfully completed any modules in the incompatible list.
No incompatible modules listed
Co-requisite Modules
No Co-requisite modules listed
Requirements

This is prior learning (or a practical skill) that is mandatory before enrolment in this module is allowed. You may not enrol on this module if you have not acquired the learning specified in this section.
No requirements listed
 
Indicative Content
Transformers
Transformer principles, ideal transformer calculations. Magnetising current, iron and copper losses, equivalent circuit. Use of per unit or per cent impedance. Regulation and efficiency. Construction of power transformer. Three phase transformers. Use of transformer for impedance matching at high frequencies. Instrument transformers
AC Generators
Construction and use of salient pole and cylindrical rotor types. Principle of operation, relationship between speed, number of poles and frequency. Description of voltage regulator and governor action. Use of synchronous motor to control reactive consumption.
Three phase Induction Motor
Principle of operation, rotating field, produced by stator windings, resulting torque on rotor, concept of slip. Torque / slip curves. Construction of stator and squirrel cage rotor. Effect of rotor resistance and reactance on torque. Description and use of wound rotor induction motor. Power factor, efficiency, starting torque and current. Direct-on, star-delta and rotor resistance starters. Speed control; inverters.
Single Phase Motors
Construction and principle of operation of different types of single phase induction motors. Split phase, Capacitor start, Universal motor. Typical ratings and application of single phase motors.
DC Machines
Commutating devices, interpoles, armature reaction. Equation for generated emf. Comparison of lap and wave windings. Equation of motor torque and speed. Characteristics of series, shunt and compound connections and applications. Use for speed control. Thyristor control. Inverter driven DC machines and braking.
Module Content & Assessment
Assessment Breakdown%
Coursework40.00%
End of Module Formal Examination60.00%

Assessments

Coursework
Assessment Type Performance Evaluation % of Total Mark 30
Timing Every Week Learning Outcomes 1,3,4,5,6
Assessment Description
Weekly assessment of the lecture's theory using Simulink/Simscape. All formulas derived in lectures are validated. The Simulink model with the scope traces are uploaded weekly on Canvas. Reports are also required occasionally.
Assessment Type Multiple Choice Questions % of Total Mark 10
Timing Week 7 Learning Outcomes 1,2,3
Assessment Description
Assessment of lecture material covered in weeks 1-6.
End of Module Formal Examination
Assessment Type Formal Exam % of Total Mark 60
Timing End-of-Semester Learning Outcomes 1,2,3,4,5
Assessment Description
End-of-Semester Final Examination
Reassessment Requirement
Repeat examination
Reassessment of this module will consist of a repeat examination. It is possible that there will also be a requirement to be reassessed in a coursework element.

The University reserves the right to alter the nature and timings of assessment

 

Module Workload

Workload: Full Time
Workload Type Contact Type Workload Description Frequency Average Weekly Learner Workload Hours
Lecture Contact Lecture on electrical machine theory. Every Week 3.00 3
Lab Contact Laboratory demonstration with students utilising raw data to determine characteristics of machine under test. Every Week 1.00 1
Independent & Directed Learning (Non-contact) Non Contact Further study of class notes and recommended resources. Every Week 3.00 3
Total Hours 7.00
Total Weekly Learner Workload 7.00
Total Weekly Contact Hours 4.00
Workload: Part Time
Workload Type Contact Type Workload Description Frequency Average Weekly Learner Workload Hours
Lecture Contact Lecture on electrical machine theory. Every Week 2.00 2
Lab Contact Laboratory demonstration with students utilising raw data to determine characteristics of machine under test Every Week 1.00 1
Independent & Directed Learning (Non-contact) Non Contact Further study of class notes and recommended resources. Every Week 4.00 4
Total Hours 7.00
Total Weekly Learner Workload 7.00
Total Weekly Contact Hours 3.00
 
Module Resources
Recommended Book Resources
  • John Bird. (2017), Electrical Circuit Theory and Technology 6th Edition, Routledge; 6 edition (April 17, 2017), [ISBN: 978113867349].
Supplementary Book Resources
  • Austin Hughes (Author) & Bill Drury (Author). (2013), Electric Motors and Drives: Fundamentals, Types and Applications, 4th. Newnes, [ISBN: 978-0080983325].
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
CR_EEPSY_8 Bachelor of Engineering (Honours) in Electrical Engineering 4 Mandatory
CR_EELEC_7 Bachelor of Engineering in Electrical Engineering 4 Mandatory