2015/16 Taught Postgraduate Module Catalogue
ELEC5565M Electric Drives
15 creditsClass Size: 150
Module manager: Dr J. Corda
Email: j.corda@leeds.ac.uk
Taught: Semester 1 (Sep to Jan) View Timetable
Year running 2015/16
This module is mutually exclusive with
ELEC3560 | Electric Drive Systems |
This module is not approved as an Elective
Objectives
The objectives of the module are:- to extend understanding of classic electric machines
- to engage equivalent circuitrepresentatives for modelling the drive characteristics
- to comprehend principal methods of control in variable spedd drive systems
In addition to standard lab classes students should consolidate the understanding of lecture material by hands on experience with a chopper controlled DC motor through 3 three-hour design lab sessions.
Learning outcomes
On completion of this module, students should be able to:
- understand relationships between voltage, current, flux, emf, torque and speed of a DC motor; explain the steady-state torque/speed characteristics under variable voltage and variable field conditions; explain the transient behaviour with rapid change of control variables; solve numerical problems;
- sketch and explain the current and voltage waveforms for thyristor control under steady-state conditions for operation with continuous and discontinuous current; explain why discontinuous current operation is undesirable and suggest methods for overcoming the problem; explain the power factor at the convertor input; solve numerical problems; understand the closed-loop control arrangements for DC drives;
- sketch and explain the current and voltage waveforms under steady state conditions for chopper control, the relationship between the chopper duty cycle and speed, continuous and discontinuous current operation, impact of switching frequency; understand chopper controlled DC drive configurations for motoring and braking modes; solve numerical problems;
- explain the magnetic field spatial distribution in an idealised rotary machine with smooth airgap; explain production of rotating field in a 3-phase idealised machine; describe the electromechanical arrangements of 3-phase induction motors; understand slip speed, rotor currents and torque production;
- understand the rotor circuit and per-phase equivalent circuit of the 3-phase induction motor; derive and explain expressions for electromagnetic torque and the torque/slip characteristics and understand stable and unstable operating regions; solve numerical problems;
- describe classical methods of speed control for cage and slip-ring types of induction motor drives; explain operations with motoring, generating and braking modes; explain principles of combination of variable-frequency and variable-voltage method for speed control; solve numerical problems.
Syllabus
- Operating characteristics and control principles of DC motors. Steady-state characteristics and transient behaviour.
- DC motor drives: Thyristor convertor controlled drives; chopper controlled drives; closed-loop control strategy for a separately excited motor.
- 3-phase induction motor drives: Electromagnetic arrangement and operating principles of induction machines, equivalent circuit, phasor diagram and torque/slip characteristics; operation in motoring, generating and braking modes; classic methods of speed control of cage and slip-ring induction motors; principles of variable-voltage and variable-frequency method of speed control.
Teaching methods
Delivery type | Number | Length hours | Student hours |
Laboratory | 5 | 3.00 | 15.00 |
Lecture | 20 | 1.00 | 20.00 |
Private study hours | 115.00 | ||
Total Contact hours | 35.00 | ||
Total hours (100hr per 10 credits) | 150.00 |
Private study
50 hours - preparing lab reports65 hours - reading lectures and studying numerical examples
Opportunities for Formative Feedback
Feedback on laboratory reportMethods of assessment
Coursework
Assessment type | Notes | % of formal assessment |
Report | 2 Laboratory Log Books & Progress Reports | 10.00 |
Project | Mini project | 20.00 |
Total percentage (Assessment Coursework) | 30.00 |
Normally resits will be assessed by the same methodology as the first attempt, unless otherwise stated
Exams
Exam type | Exam duration | % of formal assessment |
Standard exam (closed essays, MCQs etc) | 3 hr 00 mins | 70.00 |
Total percentage (Assessment Exams) | 70.00 |
Normally resits will be assessed by the same methodology as the first attempt, unless otherwise stated
Reading list
The reading list is available from the Library websiteLast updated: 11/04/2016
Browse Other Catalogues
- Undergraduate module catalogue
- Taught Postgraduate module catalogue
- Undergraduate programme catalogue
- Taught Postgraduate programme catalogue
Errors, omissions, failed links etc should be notified to the Catalogue Team.PROD