AC Motors and VFD

Course Description

This 24-hour workshop is designed to provide participants with the fundamentals of industrial AC Motors. The workshop begins with electrical safety including electrical hazards. It follows with a practical introduction to transformer fundamentals as applied to industrial electricity and AC induction motors. Participants will also learn the fundamentals of variable frequency drives and practical Allen Bradley Powerflex specific functionality and troubleshooting.

Course Outline

Electrical Safety

  • Power of Electricity
  • How to identify electrical hazards
  • Electrical Lockout / Tagout for 3-Phase power systems according to OSHA 1910.147 Subpart S

Transformers and Magnetic Theory

  • Introduction to Transformers
  • Magnetic Coupling and Induction

Introduction to AC Motors and Theory

  • Induction Motor Theory
  • AC Motor Terminology
  • AC Motor Construction
  • AC Motor Wiring methods (wye-delta, 6, 9 and 12 lead)
  • Motor Efficiency

Variable Frequency Drives

  • Introduction to AC Motor Speed Control
    - Variable Frequency Inverters
  • Power and Signal Wiring
  • Drive Installation/Replacement
  • Control Options
    - Interface Modules
    - Input Modules
  • Human Interface Module
    - Start-up Parameters
    - Advanced Parameter Operation
  • Troubleshooting
  • Fault Identification and Clearing
  • Troubleshooting Charts and Corrective Action
  • PLC Operation
  • Discrete Inputs and Outputs
  • Other Allen-Bradley Drives

Course Requirements

Company must provide a powerflex drive typical to their systems and a safe means to energize the drive. Participants are also asked to bring their own Multimeters to use in accompanying exercises.