Power Electronics and Motor Drives

Overview

1- Introduction on power electronics:
Introduction, brief outline and the main purpose of this module. Applications and description of power electronics evolution.
2- Power semiconductor devices:
Types and characteristics of switching power devices and their equivalent circuits including noni-deal characteristics.
3- Review of electrical and magnetic circuit concepts:
Revision of basic electric and magnetic circuits that align with the applications of power electronics. Origin of losses in switching power devices including conduction and switching losses.
4- Switched RLC circuits and diode rectifier:
Series and parallel operation of diode and reverse recovery characteristics of power diode. Steady-state capacitor voltage and inductor current in RLC circuits and the energy stored amount. The initial dv/dt and di/dt of RLC circuits.
5- DC/DC converters:
Ideal transistor switch and switching techniques for DC/DC conversion. Types and the principle operation of DC/DC converters. Performance parameters, analysis and design of DC/DC converters.
6- DC power supplies and DC drives:
Types of DC power supplies and circuits topologies. Operation, design and analysis of DC power supply. The basic characteristics of DC drives and their operating modes. Determining the performance parameters of DC/DC converter drives. Closed-loop and open loop transfer functions of DC motors.
7- Pulse width modulated (PWM) Inverters:
Switching techniques of DC/AC converters (inverters) and their types. The operating principle and the performance parameters of inverters. Types of modulation techniques for obtaining sine wave and reducing the harmonics. Single-phase bridge inverters, current source inverters and variable DC-link inverter.
8- Thyristor circuits:
Types of thyristors. Turn-off and turn-on characteristics of thyristors and explaining the limitations of thyristors. Series and parallel operations and di/dt & dv/dt protection.
9- Controlled rectifier:
The controlled rectifiers operation, characteristics, and performance parameters. Analysis and design of controlled rectifier circuits. Single and three-phase full converters and pulse-width-modulation (PWM) control.
10- AC voltage controllers:
Types, operation, and characteristics of AC voltage controllers. Operation of single-phase full-wave controllers with resistive and inductive loads.
11- AC power supplies and AC motor drives:
Switched-mode, resonant, and bidirectional AC power supplies. Induction motor drives and vector control. Synchronous motor drives and design of speed controller.

Learning Objectives

1- Understand the principles of power electronics
2- Recognize and classify switching devices and their characteristics
3- Describe the principle of operation of dc-dc converter
4- Describe and determine the characteristics of converter drives
5- Analyse the switching and modulation techniques for inverters
6- Design and analyse the inverters
7- Determine and analyse the controlled rectifier circuits
8- Explain and determine the performance of motor drives
9- Use computer-aided tools for power electronics circuits analysis
10- Characterize a power electronics circuit using lab equipment.

Skills

• The ability to link power electronics theory with the real life application
• Demonstrate programming and development skills in MATLAB
• Hardware design and analysis of a complete power electronic circuit.
• Enhancing teamwork skills, written and oral technical communication skills.

Assessment

none