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Session 1526

An efficient pedagogical approach for integrating power electronics, drives and the PMDC motor into the traditional energy conversion course

Steven M. Hietpas

Department of Electrical Engineering South Dakota State University, SD 57007

Abstract

Over the last 40 years, the advent of power electronics has extensively impacted almost every aspect of Electromechanical Energy Conversion (EMEC). The effective integration of power electronics, electric drives, and system related issues into the EMEC curriculum demanded a significant redesign of both the course and laboratory exercises. Using a "just-in-time" strategy, four laboratory exercises and corresponding lecture material associated with the buck and boost switch-mode power supply (SMPS), the 2- and 4- quadrant drive, and the permanent magnet DC (PMDC) motor has been developed. Before introducing SMPS, the fundamental operation and electrical equivalent of the PMDC motor is established. Using the volt-second energy balance approach, the buck and boost SMPS and their voltage transfer characteristics are developed. Using the principles of duality, the SMPS is extended to the 2-quadrant drive for the PMDC motor. Three laboratory exercises, associated with these topics, are conducted very near the presentation of the lecture course material. These three exercises culminate into a fourth exercise involving a 2-quadrant drive used as a power- processing converter between a solar array and a submersible solar-powered pump. An efficient pedagogical approach integrating these topics has resulted in a concise set of lecture materials and exercises. Elements of the course material and exercises are presented in this paper.

I. Introduction

Today, electric machines are very frequently only one component in an EMEC system (frequently referred to as a “drive”). Power electronic devices have enabled unprecedented control over and flexibility of EMEC, and because of their tremendous advantages such devices have become extremely common in practice and continue to become more prevalent1. Greater than 20 percent of motors produced require some form of electronic motor control2, strongly suggesting that electrical engineers should acquire a sufficient understanding of the power electronic drives in addition to the

Proceedings of the 2002 American Society for Engineering Education Annual Conference & Exposition Copyright  2002, American Society for Engineering Education

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Hietpas, S. (2002, June), An Efficient Pedagogical Approach For Integrating Power Electronics, Drives, And The Pmdc Motor Into The Traditional Energy Conversion Course Paper presented at 2002 Annual Conference, Montreal, Canada. 10.18260/1-2--10313