Electric Motors and Variable Speed Drives: Selection, Applications, Operation, Diagnostic Testing, Protection, Control, Troubleshooting and Maintenance
Select Other "city & date"
Electric Motors and Variable Speed Drives: Selection, Applications, Operation, Diagnostic Testing, Protection, Control, Troubleshooting and Maintenance Course
Introduction:
Detailed discussions will cover various drive features, including operating modes, braking types, automatic restart, and more.
Participants will acquire an understanding of the four essential prerequisites for the proper functioning of a Variable Speed Drive (VSD), with a particular focus on common controller faults, their causes, and repair methods. The final section of the course equips participants with fundamental tools for confidently and effectively troubleshooting VSDs.
Course Objectives:
By the end of this course, participants will be able to:
- Demonstrate a sound understanding of how AC Variable Speed Drives (VSD's) work
- Install VSDs properly
- Select the right VSD for a given application
- Troubleshoot VSDs competently
- Competently explain how flux-vector control works for drive applications
- Understand squirrel cage induction motors
- Identify the protection and control system requirements for VSD's
- Interface VSD’s with PLCs
- Understand the causes of motor burnout
- Deal effectively with VSD harmonics and EMC/EMI problems
Who Should Attend?
This course is intended for all Instrumentation, Control, Electrical/Electronic Engineers and Technicians, Maintenance Personnel, Plant Technical Staff, and Supervisors.
Course Outlines:
Introduction
- Induction Motors
- Characteristics of squirrel-cage motors
- Stator construction
- Rotor construction
- Air gap
- Operating features
- Standard motor
- Torque
Maintaining Three-Phase Motors
- Maintenance requirements
- Cleaning motors
- Care of stator windings
- Care of rotor
- Overload and single-phase operation problems
- Motor shaft currents
- Induction motor bearings
- Bearing temperatures
- Lubrication and bearing
- Ball bearings
- Sleeve bearings
- Heating of bearings
- Vibration
- Surrounding factors
Machine Disassembly and Reassembly
- Replacing ball bearing
- Rotor removing
- Preparation
- Lifting rotor
- Pulling out rotor
- Inserting rotor
Electrical Testing
- Recommended field insulation test
- AC high potential
- AC megger
- DC high potential
- Measurements of temperature rise
- Thermometer
- Resistance
- Thermocouple
Troubleshooting Electric Motors
- Locating the motor as the problem as quickly as possible
- Determining the reason, the motor failed
- Excessive mechanical load
- Low or high line voltage
- Unbalanced voltages
- Single-phasing
- Excessive duty cycle
- High ambient temperature
- Insufficient ventilation