AC Electrical Motors & Drives: Troubleshooting, Maintenance & Protection

Course Category : Quality

This programme empowers professionals to master the maintenance, troubleshooting, and protection of AC electrical motors and drives, ensuring optimal performance and high system reliability.
Duration: 5 Days
Level: Advanced

Introduction

AC motors and their associated drives represent the foundation of industrial operations across a broad range of applications. These systems convert electrical energy into mechanical power with remarkable efficiency and integrate with modern SCADA platforms for automated control. As such, ensuring their proper installation, maintenance, troubleshooting, and protection is essential for maximising uptime and extending equipment lifespan.
This course provides an advanced technical framework for understanding AC electric motor structures, drive technologies, maintenance methodologies, protection devices, and fault-diagnosis techniques. It equips participants with practical skills in analysing motor performance, identifying failures, optimising drive settings, interpreting single-line diagrams, and applying industry standards for safe and efficient operation. The programme is curated to strengthen industrial reliability and elevate technical proficiency..

Targeted Specializations

  • Industrial electricians
  • Electrical supervisors
  • Plant electrical technicians
  • Operations & maintenance engineers
  • Maintenance technicians
  • Motor-drive technicians
  • Control-systems engineers
  • Production-line engineers

Targeted Skills

  • Understanding AC motor construction & principles
  • Mastery of Variable-Speed Drives (VSD) operation
  • Troubleshooting motor and drive failures
  • Applying preventive & corrective maintenance
  • Reading electrical single-line diagrams
  • Implementing motor & drive protection strategies
  • Analysing vibration, temperature, and load behaviour
  • Applying industrial safety standards
  • Optimising performance under varying loads
  • Diagnosing inverter-related electrical faults

Expected Outcomes

  • Understand operational principles of AC motors and drives.
  • Analyse performance characteristics and detect abnormalities.
  • Apply preventive and corrective maintenance practices.
  • Troubleshoot motor and drive faults professionally.
  • Interpret electrical drawings and single-line schematics.
  • Optimise motor performance under various load conditions.
  • Use diagnostic tools for electrical and mechanical evaluation.
  • Select suitable protection devices and schemes.
  • Apply electrical safety standards in industrial environments.
  • Prepare maintenance and repair documentation effectively.

Training Topics Index

  • Fundamentals of magnetics & excitation
  • Rotating-machine theory and construction
  • Single-phase & three-phase motor types
  • Torque-speed characteristics & efficiency
  • Induction-motor starting and acceleration
  • Load compatibility & speed-control needs

  • Principles of Variable-Speed Drives (VSDs)
  • Power semiconductors. SCR, IGBT, MOSFET
  • Voltage-source & current-source inverters
  • PWM inverter operation & DC-link considerations
  • Harmonics, switching transients & power factor
  • EMI effects and filtering

  • Motor characteristics, cooling & enclosure types
  • Detection of stator-winding failures
  • Routine and advanced maintenance methods
  • Addressing common issues. overheating, bearings, etc.
  • Standards & testing methods in maintenance

  • Converter failure analysis
  • Reversing-circuit troubleshooting (1-phase & 3-phase)
  • Preventive-maintenance frameworks
  • Imbalance detection & failure symptoms
  • Diagnostic techniques for drive issues

  • Motor-protection principles
  • Fuses, breakers & modern protection relays
  • Motor-protection curves & backup systems
  • Protection of inverters & converters
  • System-design considerations for effective protection

Course Features

  • Modern and practical content
  • Real-world examples and leadership exercises
  • Pre- and post-course assessments to measure impact
  • Accredited certificate with QR code verification

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