The program will provide participants with an introduction to various types of motors and drives, along with the associated terminology. The discussion will encompass the application of different motor types and their suitability for specific operational duties. Moreover, the program will delve into the operation, troubleshooting, and maintenance of motors in great detail.

It is worth noting that electrical drives and rotating equipment account for approximately 50% of the world's total electrical energy consumption. Consequently, the maintenance costs of electrical motors can constitute a significant portion of the budget for industries involved in manufacturing and mining. This workshop aims to equip participants with a comprehensive understanding of motor operation, maintenance, and failure modes, enabling them to effectively maintain and troubleshoot electrical motors. Participants will also gain valuable insights into selecting appropriate protection measures to ensure motor reliability and longevity in the face of fault conditions.

Course Objectives:

The objectives of this course:-

Have an understanding of the different types of motors and drives.
Be able to operate motors as close as possible to the design efficiency.
Will be able to monitor efficiency, availability, and reliability.
Have learned about selection, operation, and maintenance strategies.
Be able to troubleshoot motor and drive problems.
To present the operation and construction of AC electric motors and the electrical drives based on modern state-of-the-art inverter technology, and their characteristics that need to be matched with those of loads.
To discuss maintenance procedures both for motors and drives following well-established industrial procedures as outlined in standards.

Who Should Attend?

Anyone associated with the use of electrical motors in the industrial or automation environment. The workshop will also benefit those working in system design as well as site commissioning, maintenance, and troubleshooting. Typical personnel who would benefit are:

Plant Engineers
Instrument Technicians
Operations Personnel
Electrical Maintenance Technicians & Supervisors
Instrument and Control Engineers
Process Control Engineers
Electrical and mechanical engineers.
Technicians and plant operations and maintenance personnel.
Supervisors, team leaders, and professionals in maintenance engineering departments.
Anyone who wishes to update their knowledge on one of the most important equipment combinations, i.e. motor/drive, and how to get the best of their trouble-free operation in the plant if possible.
Mechanical Engineers
Service Technicians
Maintenance Personnel

Course Outlines:

Introduction

An Introduction to Motor Types
Induction, DC, servo, synchronous, linear, etc.
Induction Motors
Introduction to AC induction motors and their construction, rotor slip and principles of operation, equivalent circuit, torque-speed characteristics, motoring and regenerative region of operation
Starting of induction motors and associated techniques
Speed control methods of induction motors
Characteristics of motors, enclosures, and cooling methods, application data, design characteristics, insulation of AC motors
DC Motors
Introduction to DC motors and their construction, principles of operation, and torque-speed characteristics.
Conversion of AC to DC
Motor Selection
Torque/speed, ripple, peak
Acceleration
Load/power density
Thermal capacity
Efficiency

Motor Diagnostics & Troubleshooting

Identification of damage mechanisms & remediation
Damage Mechanisms
Dynamic defects - imbalance, misalignment, looseness
Insulation degradation
Stator faults
Rotor faults
Controller faults
Monitoring Techniques
Vibration analysis
Thermography
Motor current analysis
Motor resistance/capacitance analysis
Troubleshooting
Motor Control
Drives, protection systems, and controllers
Drives
Induction motor starters & drive panel instrumentation & control
DC drives, protection & control
Protection Systems
Short circuit
Ground
Single phasing
Rotor Lock, etc.

Variable Speed Drives

Basic principles of AC Variable-Speed Drives (VSD's), constant torque region, constant power (extended speed) region, four-quadrant operation
Power semiconductors, diode, thyristor (SCR), IGBT, MOSFET, GTO, and others
Inverters, Voltage-source and Current-source, Pulse Width Modulated (PWM) inverters
Two-level pulse width modulated inverter, DC link energy and capacitor sizing, regeneration or dynamic slowdown, dynamic breaking, reg generation
PWM waveforms and analysis, effects of PWM on motor bearings and insulation and life expectancy, Volts/Hertz control, start-up and operation, dynamics, PWM rectifier inverter systems
Switching transients, harmonics and power factor, failures, common failure modes, fault current limit, device explosion rating, device application, thyristor failures, and testing, identification of failed Thyristor and Diode, testing of Thyristor and Diode

Troubleshooting and Maintenance of Motors

Characteristics of motors, enclosures, and cooling methods, application data, design characteristics, insulation of AC motors.
Failures in three-phase stator windings, predictive maintenance, motor troubleshooting, diagnostic testing for motors.

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