MCCCD Program Description

Industrial Motors and Motor Control

Course: AIT225

First Term: 2022 Fall

Lecture 3.0 Credit(s) 2.0 Period(s) 2.0 Load
Subject Type: Occupational
Load Formula: T - Lab Load

Description: An introductory course in DC, single-phase AC, and 3-phase AC electric motors and motor control circuits. Includes electric motor control circuit components, motor control circuit applications, sequence circuits, and timer circuits.

MCCCD Official Course Competencies
1. Install DC, single-phase AC, and 3-phase AC electric motors. (I) 2. Operate DC, single-phase AC, and 3-phase AC electric motors. (I) 3. Test DC, single-phase AC, and 3-phase AC electric motors. (I) 4. Troubleshoot DC, single-phase AC, and 3-phase AC electric motors. (I) 5. Interpret electric motor control component symbols and motor control circuit diagrams/schematics. (II) 6. Describe the operation of motor control circuit components, such as contactors, manual starters, control relays, auxiliary contacts, and overloads. (III) 7. Install motor control circuit components, such as contactors, manual starters, control relays, auxiliary contacts, and overloads. (III) 8. Troubleshoot electrical motor control circuit faults. (IV)
MCCCD Official Course Competencies must be coordinated with the content outline so that each major point in the outline serves one or more competencies. MCCCD faculty retains authority in determining the pedagogical approach, methodology, content sequencing, and assessment metrics for student work. Please see individual course syllabi for additional information, including specific course requirements.

MCCCD Official Course Outline
I. DC, single-phase AC, split-phase AC, and 3-phase AC electric motors A. Installing/connecting given a schematic B. Energizing/operating motors C. Operation of DC motor configurations 1. Compound 2. Series 3. Shunt D. DC and AC motor specifications interpretation E. DC and AC motor nameplate interpretation F. Multimeter and mega-ohmmeter (megger) to test a DC and AC motor G. Operating a DC motor speed controller 1. Function 2. Purpose H. Motor brake 1. Function 2. Purpose I. Bearing grounding rings 1. Function 2. Purpose J. Selecting an AC motor overload K. Description, calculations, and operational cost analysis 1. Motor torque 2. Horsepower 3. Performance/specification verification 4. Kilowatts 5. True power 6. Apparent power 7. Motor slip 8. Motor efficiency L. Power factors and power factor corrections II. Electric motor control schematic/diagrams A. Interpret ladder and wiring diagrams B. Types of basic electrical relay components C. Schematic and wiring diagrams 1. Labels 2. Component symbols 3. Connections III. Operation and installation of electric motor control components and circuits A. Manual motor starters B. Manual starters C. Control relays D. Auxiliary contacts E. Overloads F. Magnetic motor control G. Reversing motor H. Timers I. Sequence J. Basic machine control IV. Troubleshooting A. Systematic methodology B. Types of failures 1. AC and DC relay control circuits 2. AC and DC motors C. Components and electric motors 1. In-circuit 2. Out of circuit D. Multimeter use 1. In-circuit 2. Out of circuit

MCCCD Governing Board Approval Date: February 22, 2022

All information published is subject to change without notice. Every effort has been made to ensure the accuracy of information presented, but based on the dynamic nature of the curricular process, course and program information is subject to change in order to reflect the most current information available.