### EEE8016 : Electrical Machines and their applications

• Offered for Year: 2019/20
• Module Leader(s): Dr Glynn Atkinson
• Owning School: Engineering
• Teaching Location: Newcastle City Campus
##### Semesters
 Semester 1 Credit Value: 15 ECTS Credits: 8.0

N/A

#### Aims

To provide a thorough basis for electrical machines study at advanced level.

#### Outline Of Syllabus

Salient pole Synchronous Machine -dq approach: -
*DQ axis reactance models, salient pole phasor diagrams, torque and power calculations, reluctance and excitation torque, voltage and current fed performance, wound rotor and PM types.

Circuit analysis of electrical machines: -
*Development of circuit models from dc machine and synchronous machine routs. Impedance matrix; instantaneous and phasor variables; real-coil and pseudostationary coil machines; expressions for torque and power, transformation of variables with power invariance, examples; general two-axis machine. Extension of two axis models to induction motors and links to the steady state per phase model.

Steady state models for ac commutator motors.

Parks equations and two-axis equivalent circuits
Derivation of Parks equation and dq equivalent circuits for a general two-axis machine.

Single Phase Induction Motor:
*Analysis of simple single phase salient pole induction motor; derivation of equivalent circuit showing forward and backward wave effects; torque characteristics, f and b components; practical methods of improving starting characteristics: capacitor motor, shaded pole motor, split phase motor.

Transient behaviour of machine
*Transients in dc machine, time constants, distinction between electromechanical and electrical transients, linearization concepts, numerical methods.
Electrical transients effects in ac machines using a sudden symmetrical short circuit in a synchronous machine as an example; transient and sub-transient reactances and time constants, engineering importance; discussion of behaviour in physical terms, with reference to equivalent circuits.

Electromechanical transients in ac machines, natural oscillation frequencies.

Reluctance Machines
Synchronous reactance, stepping motors and switched reluctance machines, principles of operation and models for operating characteristics.

Models and reference frames: -
An understanding of alternative reference frames, dq, alpha/beta, space vector, forward/backward, rotor/stator/air gap and their transformations for each machine type. An explanation of the merit of each derived machine model.

Synchronous Machines
Models for saturations; field oriented control of damperless machine; role of damper circuits, field oriented control of dampered machine.

Permanent magnet Synchronous machines:-
Performance under vector control; field weakening.

Synchronous Reluctance Motors
Operation for peak torque per unit current; power factor; current angle for max power-factor; field oriented control, field weakening, comparison with induction machines.

Induction motors
Induction machine models for control purpose; relationship of induction motor models to synchronous and dc. Harmonics in spatial mmf, reasons for their existence and explanation of the effects they cause -zero sequence, asynchronous crawling, cogging, harmonic torques.

Brushless DC machines:
Armature reaction, compensating windings, commutation, interpoles.

Brushless dc drives.
Principles of operation: sinusoidal and trapezoidal drives. Relationship to brushless dc machine.

Stepping and Switched Reluctance Machines
Models,reasons for difference with other machines; relationship to other machine types through flux linkage/current.

#### Learning Outcomes

##### Intended Knowledge Outcomes

To have good physical grasp of the modes of operation of electrical machines particularly in relation to operation with fast acting controllers.

##### Intended Skill Outcomes

To gain the ability to model electrical machines in both steady state and transient modes.

#### Teaching Methods

##### Teaching Activities
Category Activity Number Length Student Hours Comment
Guided Independent StudyAssessment preparation and completion12:152:15Final exam
Scheduled Learning And Teaching ActivitiesLecture121:0012:00N/A
Scheduled Learning And Teaching ActivitiesLecture122:0024:00N/A
Scheduled Learning And Teaching ActivitiesLecture112:0012:00Exam revision
Guided Independent StudyAssessment preparation and completion111:0011:00Midterm assignment
Guided Independent StudyAssessment preparation and completion10:450:45Online teaching unit assessments
Guided Independent StudyIndependent study188:0088:00Reflecting on lecture notes; general reading; solving problems.
Total150:00
##### Jointly Taught With
Code Title
EEE3002Electrical Machines
##### Teaching Rationale And Relationship

Lectures provide the core material and guidance for further reading, problem solving and practice are integrated into the lecture structure.
Computer based simulation problems will allow the students to gain a deeper understanding of the characteristics and principles of the electrical machines being studied, and an ability to link the mathematical models developed to the electrical machine operation.
The online unit assessments will help the students to reflect on what has been learnt so far and give feedback throughout the course.
The mid-term assignment will help to bring together course material and simulation skills in a problem based setting and will provide feedback well ahead of the final exam.

#### Assessment Methods

The format of resits will be determined by the Board of Examiners

##### Exams
Description Length Semester When Set Percentage Comment
Written Examination1351A80N/A
Written Examination451M10Online multiple choice tests
##### Exam Pairings
Module Code Module Title Semester Comment
EEE3002Electrical Machines1N/A
##### Other Assessment
Description Semester When Set Percentage Comment
Written exercise1M101500 word mid-term assignment
##### Assessment Rationale And Relationship

Each online assessment will allow the students to demonstrate their knowledge on a single teaching unit; Background and mechanical modelling, Induction machines, DC machines, Synchronous machines. The tests will give instant feedback which can be reflected upon as the course progresses.
The midterm assignment will allow the students to demonstrate a deeper understanding in a problem based setting. Again feedback will be given prior to the end of the autumn term to allow the students to reflect.
The examination allows students to demonstrate their problem solving skills together with their knowledge and understanding of the subject matter outlined in the lectures.

#### General Notes

Original Handbook text:

Disclaimer: The information contained within the Module Catalogue relates to the 2019/20 academic year. In accordance with University Terms and Conditions, the University makes all reasonable efforts to deliver the modules as described. Modules may be amended on an annual basis to take account of changing staff expertise, developments in the discipline, the requirements of external bodies and partners, and student feedback. Module information for the 2020/21 entry will be published here in early-April 2019. Queries about information in the Module Catalogue should in the first instance be addressed to your School Office.