Module Catalogue

EEE3201 : Electrical Machines and Generators

  • Offered for Year: 2017/18
  • Module Leader(s): Dr Naayagi Ramasamy
  • Owning School: Engineering
  • Teaching Location: Singapore
Semesters
Semester 1 Credit Value: 10
ECTS Credits: 5.0

Aims

Completion of the steady state analysis of electrical machines and generators and an extension to their dynamic performance.

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.
•       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.

Teaching Methods

Teaching Activities
Category Activity Number Length Student Hours Comment
Guided Independent StudyAssessment preparation and completion12:002:00Final examination.
Guided Independent StudyAssessment preparation and completion121:0012:00Revision for final examination.
Scheduled Learning And Teaching ActivitiesLecture241:0024:00N/A
Guided Independent StudyAssessment preparation and completion18:008:00Case study
Guided Independent StudyIndependent study541:0054:00Reviewing lecture notes; general reading; solving problems.
Total100:00
Teaching Rationale And Relationship

Lectures provide the core material and guidance for further reading, problem solving and practice are integrated into the lecture structure. The case study 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.

Assessment Methods

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

Exams
Description Length Semester When Set Percentage Comment
Written Examination1201A85N/A
Other Assessment
Description Semester When Set Percentage Comment
Case study1M151000 word case study
Assessment Rationale And Relationship

The examination allows student to demonstrate their problem solving skills together with their knowledge and understanding of the subject outlined in the lectures. The case study enables students to demonstrate that they are able to apply this understanding and their analytical skills to find solutions.

Reading Lists

Timetable