Dr. Leonard White

Dr. Leonard White, PE

Electrical and Computer Engineering

Phone: 919-851-9666
Instructor Website

ECE 305 Principles of Electromechanical Energy Conversion

3 Credit Hours

Single-phase (1Ø) and three-phase (3Ø) circuits, power flow, analysis of magnetic circuits, performance of single-phase & three-phase transformers, principles of electromechanical energy conversion, and characteristics of AC and DC machinery.

ECE 305 is a perquisite for many Electrical Engineering power courses and is a good foundation for the advanced courses taught as a part of NC State University Master of Science, Electric Power Systems Engineering (MS-EPSE) program.


A knowledge of basic electrical components and how these components behave in simple DC and single-phase AC circuits; an ability to perform basic circuit analysis.  These requirements would be met by having obtained a C- or better in NCSU’s ECE 211 Electric Circuits or ECE 331 Principles of Electrical Engineering.

Course Objectives

At the conclusion of the course the student should be able to do/accomplish the following:

  • Calculate/measure single-phase and three-phase real and reactive power flow.
  • Analyze and design simple magnetic devices, relating mechanical dimensions to magnetic quantities.
  • Analyze the performance of practical single-phase and three-phase transformers.
  • Discuss electric and magnetic field interactions in electromechanical devices and machines.
  • Analyze the steady-state performance of AC and DC machines.

Course Requirements

  • Homework
  • In-class exams (2)
  • Final Exam


  1. Electric Machinery, E. Fitzgerald Charles Kingsley, Jr., Stephen D. Umans 6th Edition, McGraw-Hill, 978-0071230100, 2003 (useful but not mandatory)
  2. Goetze lecture notes – will be provided in .pdf format


Reviewed 1/21/2020