Overview
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.
Objectives
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
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