Frequency converters training course

Learn proper design recommendations to ensure that your equipment is as energy efficient and safe as possible. Discover the best practices for frequency drives in HVAC, pumping and facility applications.

Approximately 50% of these systems are running in bypass which usually results in higher energy costs. In hands-on lab exercises you will use scope meters to see how improper designs can lead to motor deterioration and other problems. You will also spend over 50% of the time programming and troubleshooting newly upgraded equipment that includes Siemens MM420 variable frequency drives.

Main topics of the course:

Introduction: Motor-Drives System Design

  • Adjusting motor speed
  • Determine operating costs
  • Technological capabilities
  • Operational reliability
  • Application characteristics

Power Transmission, Relationship and Formulas

  • Affinity laws
  • Torque and horsepower/power factor
  • Electrical demand

AC Induction Motors

  • How a motor produces torque
  • Speed, pole, frequency relationship
  • Types of AC motors
  • Designs
  • Motor enclosure types
  • Frame dimensions
  • Motor protection
  • Efficiency ratings

Motor Preventive Maintenance

  • Identify overloading
  • Loose connections
  • Phase/voltage unbalance
  • Single phasing
  • Environmental concerns
  • Megger testing
  • Effects of common mode voltage on bearings and fixes
  • Motor nameplate information
  • Drive fundamentals and electronics
  • Converter, DC bus, inverter
  • Pulse width modulation
  • Carrier and fundamental frequencies
  • Torque producing and magnetizing current
  • External operator control wiring
  • Analog control

Effect of Operating on Adjustable Frequency

  • Constant voltage mode
  • Sensor less vector
  • Flux vector: open and closed loop

Troubleshooting Drives

  • Understanding fault codes
  • Clearing faults
  • Symptoms and corrective action

Drive Maintenance

  • Dry, clean, cool and tight
  • Isolation transformer/reactors
  • Operator interfaces
  • Proper selection and application for drives
  • Load matching
  • Bypass considerations
  • Facility operating problems
  • Variable torque operations
  • Fans and pumps
  • Payback/return on investment calculations

Hands-On Lab Exercises

  • Identifying voltage signals
  • Programming basic drive parameters
  • Drive control wiring and diagnostics
  • Troubleshooting using the keypad

List of all available courses can be viewed here: Training-courses

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