ENGS 125
Power Electronics and Electromechanical Energy Conversion

Charlie Sullivan, Associate Professor, Thayer School of Engineering at Dartmouth

Proposed Project Fall 2011 The Electric Bungee

The ultimate power electronics and electromechanical energy efficiency contest. Can you store gravitational potential energy in an ultracapacitor, just as a bungee jumper stores it in a spring?

Course Description

Controlled use of energy is essential in modern society. As advances in power electronics extend the capability for precise and efficient control of electrical energy to more applications, economic and environmental considerations provide compelling reasons to do so. In this class, the principles of power processing using semiconductor switching are introduced through study of pulse-width-modulated dc-dc converters. High-frequency techniques such as soft-switching are analyzed. Magnetic circuit modeling serves as the basis for transformer, inductor, and electric machine design. Electromechanical energy conversion is studied in relation to electrostatic and electromagnetic motor and actuator design. Applications to energy efficiency, renewable energy sources, robotics, and micro-electromechanical systems are discussed. Laboratory exercises lead to a project involving switching converters and/or electric machines.

Course information

Course Website

See the blackboard site for resources for students enrolled in the course.

If you experience trouble with the Blackboard site, here's how to get help:



A set of 3-D animations of power electronics circuits.


Thayer School home page

Send e-mail to Charles.R.Sullivan@dartmouth.edu