ABB

Welcome to Power Electronics Course

Instructor

Dr. Kar 23 Old Drama Email: [email protected]

Office Hour: Thursdays, 10:00 am - 12:00 pm

Graduate Assistants

Tomi Hila Essex Hall Email: [email protected]

Office Hour: ----- Fatima Ghousia B20 Essex Hall Email: [email protected]

Office Hour: ----- Anas labak B20 Essex Hall Email: [email protected]

Office Hour: ------

Texts

Class Lectures: “ Power Electronics ” by Mohan, Undeland and Robins, 3 rd Edition, 2003, John Wiley & Sons, Inc.

Projects/Laboratory Experiments/Tutorials: “ Power Electronics Lab Manual " by N. Kar (to be posted soon)

Class Location and Time

Room 186, EH Tuesdays & Thursdays 8:30 am - 9:50 am

Tutorials/Laboratory Experiments/Projects

1. Four tutorials 2. Three labs/mini projects.

3. Detailed instructions on lab/project report/format will be given at a later time.

Marking Scheme

Attendance Midterm Exam No. 1 (5%) (20%) Midterm Exam No. 2 (20%) Final Examination (45%) Laboratory Experiments/Projects (10%)

Course Contents

1. Review of diodes, BJTs, MOSFETS, IGBTs, RLC circuits, etc. 2. Diode Rectifiers – to convert the input ac into dc in an uncontrolled manner 3. Thyristor Converters – to convert the input ac into dc in a controlled manner 4. DC-DC Switch-Mode Converters – Step-down (buck) converter – Step-up (boost) converter – Step-down/step-up (buck-boost) converter – Cuk converter – Full-bridge converter 5. Switch-Mode DC-AC Inverters – ac motor drives – Uninterruptible ac power supplies – Where a sinusoidal ac output is required whose magnitude and frequency both have to be controlled

Course Contents (Cont’d)

6. Application of Power Electronic Systems – Battery Charging – Renewable Energy from Wind – Uninterruptible Power Supplies (UPSs) – DC and Induction Motor Drives: • A motor drive consists of – An electric motor – A power electronic converter – And possibly a speed and/or position sensor • Applications – Servo motor drives in robotics – Variable-speed drive for adjusting flow rates in pumps

SET Forms

Student Evaluation of Teaching forms will be administered during the last two weeks of the class.

Scope and Applications

Power Flow through Converters

o An ac/dc converter is shown here o Converter is a general term o Converters: rectifier (ac – dc) and inverter (dc – ac) o Rectifier mode of operation when power from ac to dc o Inverter mode of operation when power from ac to dc

Power Processor as a Combination of Converters

• A converter is a basic module or building block of a power electronic system • Converters: rectifier (ac – dc) and inverter (dc – ac) • Energy storage elements (inductors and capacitors): decouple the input and the output sides

AC Motor Drives

• Converter 1 rectifies line-frequency ac into dc • Capacitor acts as a filter; stores energy; decouples • Converter 2 synthesizes low-frequency ac to motor