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Circle Circle
EE - 08
5 days
Doha
18 September, 2022
10900 QAR

Electrical Motors and Drives: Protection, Maintenance & Troubleshooting

Course Overview

The course covers all topics relating to both AC motors and their drives. AC motors represent the industry’s workhorse in all applications. It is no exaggeration to suggest that more than half of the energy consumed worldwide is converted by AC motors into work and these are controlled by drives.

Understanding maintenance and troubleshooting procedures of such vital industrial equipment means that reduced downtime and increased productivity for the company. The protection a requirement along with their function and integration with the overall system ensures that such expensive apparatus is well guarded against failures which further offer safety for operations personnel as well.

Course Objectives

Upon completion of the course, each participant would have learned the following:

  • Understand the various types of AC motors and starters
  • Determine the components and operations of variable speed drives
  • Explain the different types of variable speed drives
  • Analyze the common faults in a variable speed drive
  • Design the protection requirements for motors and drives

Who Should Attend

This course will benefit all levels of professionals in electrical installation. It will enable them to understand the operation, maintenance, and troubleshooting of AC motors and drives, also benefit for:

  • Electricians
  • Electrical supervisors
  • Plant electricians
  • Operations & maintenance engineers, supervisors & technicians
  • Maintenance technicians

Course Outlines

Module (01) Introduction to AC Motors

  • Fundamentals of Rotating Machines Theory
  • Principles of Operation of AC motors
  • construction, Rotor Slip and Torque-Speed Characteristic
  • Single-phase and three-phase AC motors
  • Types, Construction, Characteristics, and applications
  • Starting of induction motors and associated techniques and acceleration
  • Speed control requirements of AC motors and load matching
  • Selection of AC motors for industrial applications and service factor
  • Medium voltage motors and applications

 Module (02) Troubleshooting and Maintenance of Motors

  • Characteristics of motors, enclosures, and cooling methods
  • Predictive maintenance, motor troubleshooting, and  diagnostic testing
  • Failures in three-phase stator windings, rewind scenarios when a motor fails
  • Troubleshooting and maintenance of AC motors, routine care
  • Slow acceleration or refusal to starting of an AC motor, overheating, and noise
  • Standards and testing instruments

 Module (03) Drives

  • Fundamental principles and understanding of AC Variable Speed Drives
  • Power semiconductors, diode, thyristor (SCR), IGBT, MOSFET, GTO, and others.
  • Voltage-source, current-source, and pulse width modulated (PWM) inverters
  • Benefits and applications of VSD
  • Two-level PWM, regeneration and dynamic braking, volts per hertz control
  • Medium voltage VSDs, switching transients, harmonics, and power factor

 Module (04) Troubleshooting and Maintenance of Drives

  • Soft starters and selecting the correct VSD
  • VSD analyzers for converter failures, inverters, and rectifiers
  • Troubleshooting techniques and maintenance for VSD
  • VSD parameter guidelines and settings
  • VSD bearing failures and remedies
  • Testing instruments and scope meters for VSD

 Module (05) Protection of Motors and Drives

  • Protection of AC motors, requirement and  overload protection
  • Fuses, circuit breakers, magnetic and thermal overload, and solid-state
  • Motor protection curves, backup protection
  • Protection of inverters and electronic converters driving motors
  • Case studies, selection, and design of systems and their protection
Qatar Skills Training Centre
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TRAINING PLAN FORM

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