ELECTRICAL MACHINE CONTROL

for Electricians, Technicians,

and Engineers

Developed and taught by

Howard A. Smolleck, Ph.D., P.E.

Professor, Klipsch School of Electrical and Computer Engineering

New Mexico State University

Las Cruces, New Mexico 88003

505-646-3834 hsmollec@nmsu.edu

Room 204 Thomas and Brown Hall

New Mexico State University

August 4-6, 1999

The Course

A comprehensive coverage of circuits, devices, and fundamentals of industrial electrical control. Includes a review of basic electrical and control concepts, circuit theory, and related terminology; wiring diagrams, schematics, ladder diagrams, and block diagrams; and discussions of motor controls, transformers, and protective circuitry. The structure and use of relays, solenoids, limit and pressure switches, temperature and flow switches, photoelectric and proximity controls, and similar devices will be discussed along with manual and electrical switching circuits and control sequences such as full- and reduced-voltage motor starters, reversing and speed control circuits, and automatic transfer systems. Some digital logic and fundamentals of solid-state control will also be introduced. Power-factor correction, selection of motors to meet load requirements, and the effects of undervoltage and overvoltage upon motors and controllers will be covered. Primary emphasis will be placed upon developing an understanding of underlying concepts and typical application strategies.

Numerous handouts will be provided and solutions will be given to all problems. Examples of actual devices and systems will be presented and discussed. Classroom questions and discussions will be encouraged.

Textbook (provided with course):

G. Rockis and G. Mazur, Electrical Motor Controls, American Technical Publishers, 1997.

This text, recently revised, presents a modern coverage of the field of industrial machine control and will prove a useful permanent reference. Supplemental notes will also be provided.

Who should attend:

Persons directly involved in the installation, use, maintenance, or design of industrial electrical control devices and/or electrical machinery. Participants should be familiar with basic electrical fundamentals but need not have an engineering background.

Course Content

Day 1

Introduction

Review of basic concepts of electrical and electromechanical devices and circuits

Graphic and schematic symbols

Schematic diagrams, block diagrams, ladder diagrams, wiring diagrams, and single-line diagrams: how to read and understand them

Examples

Single-phase alternating-current circuits and systems

Three-phase alternating-current circuits and systems

fundamentals

advantages

delta and wye connections

balanced and unbalanced loads

unbalance factors

Electric power transmission and distribution to plant site

Introduction to electrical measurements and measuring devices

Introduction to transformers: fundamentals of construction, selection, operation, ratings, and connections

Fundamentals of motors: single-phase and polyphase; synchronous and asynchronous

Speed-torque characteristics of induction motors

Day 2

Introduction to control logic and control circuits

The control process: signals, decisions, and action

Examples of simple control circuits

Emergency lighting and other standby systems

Relays, solenoids, and solenoid-controlled devices

Limit switches, float switches, pressure switches, temperature switches, flow switches, and other transducers

Time switches, time delay relays, and timers: their operation and use

Introduction to solid-state relays

Simultaneous and sequential process control

Further discussions of control logic and its application to machine and system control

Low-voltage control

Interlocks and interlocking

Automatic transfer panels

Analysis of typical control circuits

Starting and reversing of three-phase motors

Motor speed control

Accelerating, decelerating, and compelling circuits

Day 3

Introduction to solid-state motor control

Selecting and controlling motors to meet load requirements

Other motor operation topics

Alternative control strategies (with example problems)

Simplification of control strategies

Photoelectric and proximity control

Effects of overvoltage, undervoltage, and other abnormal conditions upon motors and controllers

Elements of motor protection

Ground-fault protection

Phase reversal detection and protection

Protective versus control relaying

Effects of motors upon the electric supply

Power-factor and other parameters in terms of loading

Basic principles of power-factor correction: how and why

Introduction to solid-state and microprocessor control

The industrial electrical equipment control package - "putting it all together"

Summary of course and question-answer period

The Course Instructor

Dr. Howard A. Smolleck is a Professor of Electrical Engineering at New Mexico State University, a member of the Electric Utility Management Program faculty, a Senior Member of the Institute of Electrical and Electronics Engineers, and a Registered Professional Engineer in the state of New Mexico.

During the past two decades, he has developed and presented more than sixty short courses in the areas of electric machine control, process control, instrumentation, and power systems to engineers and technicians from such diverse organizations as Los Alamos National Laboratory, Sandia National Laboratories, Albuquerque Water Utilities, ASEA Brown Boveri, Intel, Hampton Roads Sanitation District, the US Army Corps of Engineers, Newport News Shipbuilding and Drydock, Virginia Electric Power Company, the Naval Air Rework Facility, and the Naval Facilities Engineering Command. He has been a Principal Investigator and consultant to El Paso Electric Company, Public Service Company of New Mexico, NASA/Langley Research Center, the Waste Isolation Pilot Plant, Los Angeles Department of Water and Power, the Facilities Engineering Division (FSS) of Los Alamos National Laboratory, and numerous legal and engineering firms.

As training consultants, Dr. Smolleck and his associates specialize in the development of continuing-education programs for technical persons in industry, government, and private practice. Their short courses are typically intensive and include a balance of lecture, discussion, problem-solving, and software demonstration in the various topics. They also provide extensive consulting for industry, government, and the national laboratories in the areas of electric power systems analysis and operation, machine and process control, system transient studies, power quality, lighting issues, and lightning protection.

Software provided with course

Each attendee will be provided a copy of the MACHDEM Electric Machine Demonstrator, an interactive, graphical machine demonstration package which was a winner in the Zenith Data Systems Masters of Innovation competition.

Coffee 8:30 AM

Session I 9:00-10:30 AM

Session II 10:45-12:15 AM

Session III 1:30-3:00 PM

Session IV 3:15-5:15 PM