## POWER ELECTRONICS AND DRIVE SYSTEMS

 SHE Level 5 SCQF Credit Points 15.00 ECTS Credit Points 7.50 Module Code MMH623585 Module Leader Ahmed Aboushady School School of Computing, Engineering and Built Environment Subject Electrical Power Engineering Trimesters A (September start) B (January start) C (May start)

### Pre-Requisite Knowledge

-5 Suitable honour level module

### Summary of Content

-2 This module examines Electro-magnetism and rare earth permanent magnets; materials, principles of operation and control of electrical machines and power electronic systems; for example induction machines, synchronous machines, special and advanced machines, superconducting machines. It illustrates the applications of power electronic devices including IGBT, Thyristor, etc; rectifier circuits; inverter circuits; frequency changing circuits; chopper circuits; use of resonance in power electronic systems, in addition to control and design of converter circuits and determination of filter technologies based on harmonic calculations. Characteristics of modern power electronic devices, driver circuits and protection. Also, it shows analysis and design of practical applications of electrical machines and power electronic systems; equivalent circuit analysis methods; D-Q methods; computer aided analysis and simulation techniques and performance analysis, motor control methods such as flux vector control and field oriented control. -3

### Syllabus

-4 The taught syllabus covers the following areas: Types and Design of Electrical Machines : The types of electrical machines e.g. synchronous machines, induction machines, dc machines, permanent magnet machines and small machines. Design and construction of different electrical machines Dynamics of Electrical Machines and Equivalent Circuits: The dynamic performance of electrical machines. Dynamic performance requirements: bandwidth, current limit, slew rate limit, torque/amp, torque/inertia. Mathematical techniques to analyse the machine dynamics. Analysing the equivalent circuits of each electrical machine type and the derivation of these circuits. Dynamic modelling using appropriate software e.g. MATLAB/SIMULINK Types of Power Electronic Devices: The ideal switch; groupings of power electronic device types; construction and characteristics of different power electronic devices including the power diode, the power transistor; the IGBT; the thyristor; the MOSFET; the MCT. Use of the power electronic devices in circuits and applications. Circuits: The construction and operation of dc-rectifiers and-dc inverters-including single-phase and multi-phase types. Six pulse and multilevel inverters. The inverter operation including overlap and firing angle delay. Dc-ac applications including the use of pulse-width-modulation. The use of converters in ac-ac applications including the cycloconverter, the PWM inverter, the load commutated-inverter. New drive types including the matrix converters and multi-level inverters. Control of machines: Open/closed loop, variable voltage control and constant volts/Hz control. Resulting speed and torque ranges, efficiency, response time. Modifications for pump/fan characteristics, dynamic braking, DC-link voltage control. Inverter specification and commissioning. Application of field-oriented control to induction and brushless permanent magnet machines. Constant and variable flux controller structures. Applications: Use of converters and inverters in practice with electrical machines and their general performance criteria. How to select and specify a drive for a specific application. Control of electric machines using different techniques based on power electronic converters. Protection of circuits.

### Learning Outcomes

On completion of this module the student should be able to:* Apply knowledge of basic laws and system construction of electrical machines and power electronic systems and understand why different designs are being used in different applications* Critically evaluate power electronic devices used in the control of different motors and generators and understand how these devices are used together to make a range of different drive systems.* Analyse constant and variable speed electrical drive systems so as to calculate key parameters such as torque, speed, efficiency, and power under steady-state and transient conditions.* Use computer based simulation tools to critically analyse electrical machine and power electronic system behaviour with an understanding of the mathematical algorithms upon which such tools are based.

### Teaching / Learning Strategy

-3 The university "strategy for learning" documentation has informed the learning and teaching strategy for this module. The module material will be introduced through lectures, while practical exercises, based on the lecture material, will be given to students for their practical sessions. Tutorials will be used to help explain and elaborate on both the lecture material and the practical exercises and provide opportunities for tutor led formative feedback to students. This is detailed as follows; -360b7 Policy of staff access for students, programme and library induction pack and supporting tour, module handbook providing detailed information. -360b7 Support of a module leader and programme leader, in addition to student representatives - these reflect students' views and concerns at staff-student liaison committee meetings and programme committee meetings. -360b7 Underpinning support is provided from central university support services including: online study skills facility, student counselling service, LDC, IT support using e-mail and/or on-line resources). -357b7 Knowledge and skills: the module develops knowledge and skills, and uses tools, techniques and methods which are immediately useful to employers, both in the UK and overseas. -357b7 Strong emphasis in the module on industrial or research projects with direct industrial input into the module, including the use of visiting lecturers and industrial visits. b7 The module is designed with very strong professional emphasis, informed directly by industrial expertise of staff and industrial liaison committees and professional body requirements as appropriate to enhance the career opportunities of the students in industry and academia. b7 The lecture delivery will be enhanced by a variety of forms including, where appropriate, videos, computer based models and other multimedia forms. b7 On line learning materials to be available electronically, discussion boards will be used to encourage teacher and peer-to-peer dialogue on certain topic areas where this form of communication would be regarded as effective. b7 Academic staff and the Learning Technologists will continue to work together to develop and operate the module on GCU Learn to ensure student support and information sharing. b7 Students are provided with formative and summative feedback via a variety of mechanisms. Feedback on coursework is provided within 3 working weeks of submission providing information on strengths, weaknesses and suggestions for corrective action. b7 Student feedback on teaching, learning and assessment will be sought at the end of the semester through a module evaluation questionnaire. -3 Full time -360d8 This module will be taught in a three week block. During the first short course week the lecture material will be delivered illustrated throughout by industrial case studies. During the two remaining weeks students will undertake tutorials and practical work, and will complete the assessment. The module will be guided by tutors and supported by the managed learning environment. All teaching and learning materials will be available on GCU Learn. -3 Part time -360d8 Students will attend the first week of the module where materials will be delivered by lectures throughout by industrial case studies. Students will complete the remaining material off campus supported by learning materials and course tutors. The module tutors can be contacted via e-mail, telephone and GCU Learn/discussion board. All teaching materials and case studies will be available on GCU Learn. -3 Distance learning -360d8 A study pack will be provided including: a study guide, lecture notes, tutorial notes, case studies and worked examples. All material will also be available on GCU Learn. Module tutors can be contacted via e-mail, telephone/skype and GCU Learn through discussion board. -3 -357

-360 1. Electrical Machines, Drives and Power Systems, Theodre Wildi, Prentice Hall ISBN-10:01031776916, 2013 -360 2. MOORTHI, V.R., 2005. Power Electronics. New Delhi: Oxford University Press 3. Power Electronics and Motor Drives, Bogdan M. Wilamowski, J. David Irwin, ISBN 9781439802854, 2011 by CRC Press 4. IET International conference on Power Electronics, Machines and Drives.

### Transferrable Skills

Critical thinking and problem solving. Critical analysis. Communication skills, written, oral and listening. Effective Information retrieval and research skills. Self confidence, self discipline & self reliance (independent working). Creativity, innovation & independent thinking. Knowledge of international affairs. Ability to prioritise tasks and time management (organising and planning work). Presentation skills.

### Module Structure

Activity Total Hours
Assessment (FDL) 24.00
Practicals (FDL) 12.00
Assessment (FT) 24.00
Assessment (PT) 24.00
Practicals (FT) 16.00
Tutorials (FT) 8.00
Tutorials (FDL) 8.00
Independent Learning (FT) 78.00
Independent Learning (FDL) 106.00
Tutorials (PT) 8.00
Practicals (PT) 12.00
Lectures (FT) 24.00
Independent Learning (PT) 82.00
Lectures (PT) 24.00

### Assessment Methods

Component Duration Weighting Threshold Description
Coursework 2 n/a 50.00 45% Case study, computer simulation
Coursework 1 n/a 50.00 45% Writing a report in the form of a conference paper on selected topic*, **.* Topics include, but not limited to, electric motors in ship propulsion, power electronic device developments, motor control circuits such as PWM drives, review of control algorithms applied to drive systems.** The paper should demonstrate critical evaluation of the literature and analysis of the topic under investigation, this will also improve their academic writing and presentation skills.