Spring 2014 textbook list
The Spring 2014 ECE textbook list is available online for students.
Current Prerequisites & Course Offering
For current prerequisites for a particular course, and to view course offerings for a particular semester, see the Virginia Tech Course Timetables.
ECE 4324 Electronic Control of Machines (3C)
Dynamics and control of electric machines driven by electronic power converters.
Electronic control of machines is one of the newest areas within electrical engineering. This technology is used for industrial variable speed drives, electric propulsion machine tools, robots, aircraft control actuators and in x-rays. This course provides senior and graduate students specialized study in a growing field with much demand for engineers.
Technical Elective. Typically offered: Fall. Program Area: Power.
Prerequisites: 4405 and 4224.
4405, 3304. The following material is required from the prerequisites and co-requisites:
Department Syllabus Information:Major Measurable Learning Objectives:
- Dc machine steady state and dynamic modeling, block diagram, transfer functions, ac machines steady state modeling, special construction features related to variable speed operation, parameter measurement, efficiency computation.
- Power converters for dc machine control, their principle of operation, time domain modeling, transfer function, their control, pulse width modulation and hysteresis controllers.
- Principle of speed control of dc machines, integration of machine, power converter, load and controller, design of current and speed controllers, dynamic system simulation, four quadrant operation, harmonics and their impacts on the machine and on the utility lines, direct steady state evaluation, machine derating.
- Power converters for control of ac machines, their principle of operation, time domain modeling, transfer function, their control.
- Principle of speed control of ac machines, integration of machine, various power converters, load and controller, harmonics and their impact, system efficiency computation, interaction of load, steady state evaluation, selection of converter and machine ratings for a given application.
|Overview of machine modeling||10%|
|DC rectifier drives||10%|
|DC chopper drives||10%|
|Braking in DC drives||5%|
|Four quadrant dc drives||10%|
|Closed-loop control of DC drives||15%|
|Variable frequency operation of||7.|
|PM synchronous motors||5%|
|Effects of nonsinusoidal supply||10%|
|Closed loop control of AC drives||10%|