This training course covers the basic AC and DC electric motor theory and characteristics followed by a look at how to maintain, test and protect electrical motors. The cost of maintaining electrical motors can be a significant amount in the budget item of manufacturing industries. This course gives a thorough understanding of electrical motor’s working, maintenance and failure modes and gives you the tools to maintain and troubleshoot electrical motors. This course gives a fundamental understanding of the installation, operation and troubleshooting of electric motors. Typical applications of electric motors in manufacturing, materials handling, process control are covered in detail. It gives the basic steps in specifying, installing, wiring and commissioning motors. The concluding section of the course gives the fundamental tools in troubleshooting motors confidently and effectively
By the end of this course the participant will be able to:
- Understand the basic AC and DC electric motor theory, construction and characteristics.
- Know how to maintain, test and protect electrical motors.
- Recognize the cause and source of electric motors disturbances.
- Know how to mitigate any existing and potential problems, thereby minimizing motor disoperation and process downtime.
DAY 1
DC Motors
- Basic DC Motor Operation
- Types of DC Motors
- DC Motor Ratings
- Speed/Torque Relationships of Shunt Connected Motors
- Basic DC Drives
- Converting AC to DC
- Basic Drive Operation
- Parameters and Function Blocks
- Applications
- Application Examples
- Case Studies
DAY 2
AC Motors
- Force and Motion
- AC Motor Construction
- Magnetism
- Electromagnetism
- Developing a Rotating Magnetic Field
- Rotor Rotation
- Motor Specifications
- NEMA Motor Characteristics
- Derating Factors
- AC Motors and AC Drives
- Matching Motors to the Load
- Motor Enclosures
- Case Studies
DAY 3
- Induction motors
- Induction motor construction
- Basic induction motor concepts
- The equivalent circuit of an induction motor
- Induction motor torque-speed characteristics
- Control of motor characteristics by squirrel-cage rotor design
- Starting induction motors
DAY 4
Maintenance of motors
- Introduction
- Characteristics of motors3
- Enclosures and cooling methods
- Application data
- Insulation of ac motors
- Failures in three-phase stator windings
- Motor troubleshooting
- Diagnostic testing for motors
- Case Studies
Day 5
Protection of Motors
- Overload protection
- Fuses, circuit breakers, magnetic and thermal, overload, eutectic, bimetal and solid-state, others.
- Motor protection curves, back-up protection.
- Protection of inverters and electronic converters driving motors
Case Studies
Apprentice Electricians, Apprentice Millwrights, Electrical Artisan Aides and artisans not familiar with AC Motors