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Drives and Motor Control

A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.

VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, about a third of the world's electrical energy is consumed by electric motors in fixed-speed centrifugal pump, fan and compressor applications and VFDs' global market penetration for all applications is still relatively small. This highlights especially significant energy efficiency improvement opportunities for retrofitted and new VFD installations.
Over the last four decades, power electronics technology has reduced VFD cost and size and improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.

VFDs are available in a number of different low and medium voltage AC-AC and DC-AC topologies.

Course Contents
  AC motors, operations & Limitations
  Motor Starters : DOL, Star-Delta, Auto Transformer
  Motor control circuits, interlocking circuits
  Introduction to AC drives & applications
  Criteria for drives selection
  Parameter Programming
  Designing of drive control panel
  Constant Torque Application
  Variable Torque Application
  Constant Horsepower Application
  Communication with PLC, SCADA Software
  Trouble Shooting & Retification.
 
 

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