MC-100: AC and DC Variable Speed Motor Drives

Course Description

This 32-hour, 4-day training program is designed to provide maintenance electricians with a thorough understanding of AC and DC motor construction, operation and variable speed control. Hands-on lab exercises are used throughout the training program to simulate actual plant conditions. Course hardware will include Variable Frequency AC and DC Motor Drive Workstations, Circuit Test Workstations, Oscilloscopes and Multimeter test equipment. Hands-on labs will explain operation and troubleshooting of diodes, transformers, SCRʹs, transistors and other electrical control devices.

Topical Outline

  • Electrical Review
  • Electronics Review
  • Motor Fundamentals
  • DC Motors
  • DC Motor Control
  • AC Motors
  • AC Motor Control
  • Introduction to VFD Control
  • IdentifyingPowerFlex70/700 Drive Components
  • Wiring power to the Drive
  • Wiring I/O to the Drive
  • Configuring Digital and Analog I/O
  • Configuring the Drive for Start-Up
  • Performing PowerFlex 70/700 Drive Pre- Power and Power-On Checks
  • Modifying and Monitoring PowerFlex 70/700nDrive Parameters
  • Configuring Drive Parameters Using the LCD HIM
  • Configuring Drive Parameters Using Drive Explorer Software
  • Connected Components Workbench
  • Uploading and Downloading Drive Data
  • Autotuning the Drive and Entering Motor Nameplate Data
  • Using S.M.A.R.T. Start and Autotuning on a PowerFlex 70/700Drive
  • Configuring the Drive for the Application
  • Controlling Drive Operation
  • Drive to PLC Communications
  • Installing and Configuring a Communications Adapter
  • Establishing Communications with a PLC Processor
  • Troubleshooting PowerFlex 70/700 DriveSystem Problems
  • Diagnosing and Troubleshooting Drive Problems
  • Troubleshooting Drive System Problem


Persons completing this course will be able to:
  • Explain basic AC and DC motor operation
  • Identify motor parts and function
  • Use a megohmmeter to determine the integrity of a motor
  • Describe variable speed motor control
  • Explain main drive units operation and function
  • Understand basic theory of SCR’s, diodes, transistors, triacs, and other electrical control devices
  • Troubleshoot circuits using a multimeter
  • Use prints to isolate drive and motor problems
  • Read and Set Drive Parameters


A basic understanding of electrical principles of voltage, power, current and resistance.



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