Course Description

This hands-on training event is designed to provide personnel that work with Variable Frequency Drives (VFD) a practical used understanding of AC motors and VFDs. Hands-on lab exercises are used throughout the workshop to simulate actual plant conditions. Course hardware will include a variable frequency AC motor drive workstation. A digital multi-meter is provided and students may bring one to be used in the class. A 4-20mA current loop simulator and clamp on current meter are also available.

Topical Outline

• Why use a Variable Frequency Drive
  - Variable and constant torque drives
• Motor Fundamentals
  - Motor Construction and Operation
• Variable Frequency Drives
  - Power, motor and control wiring
  - Menu System
  - Display unit
• AC Motor Speed Control
  - Starting, running and stopping a motor
  - Use drive status and correct errors to allow the motor to turn
• Control Circuits
• Troubleshooting
  - Be sure direction, speed reference and enable are set.

Prerequisites

None.

Course Length

16 hours

Objective

Persons completing this course will be able to:

• Explain basic AC motor operation
• Identify motor parts and connections
• Describe variable speed motor control
• Check the power, control and motor wiring to the drive
• Use the internal menu, edit parameters and configurations
• Save and recall drive profiles
• Check for proper operation of 4-20 mA current loop
• Read any error codes and take corrective action
• Check the status of the drive
• Proper method to change a drive