Variable Speed-Drive Troubleshooting


Variable Speed-Drive Troubleshooting

Variable Speed-Drive Troubleshooting
27 - 31 أكتوبر 2024
Cairo, مصر

What are the Goals?

The objectives of the training course are:

  • To define the operation and construction of AC electrical 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 review maintenance procedures both for motors and drives following well-established industrial procedures as outlined in standards
  • To illustrate with troubleshooting methods for both motors and drives following methodologies that have been developed by manufacturers in order to reduce downturn time dramatically
  • To analyse and familiarize on how to utilize single-line drawings and other documentation to successful perform commissioning, maintenance and troubleshooting
  • To share case studies and learn from such experience

Who is this Training Course for?

Variable speed drive and troubleshooting is intended for:

  • Electrical engineers
  • Technicians and plant operations and maintenance professionals
  • Team leaders and professionals in maintenance engineering departments
  • Anyone who wishes to update their knowledge on one of the most important equipment combination, i.e. motor/drive and how to get the best of their trouble-free operation in the plant if possible

Daily Agenda

Day One: AC Motors

  • Fundamentals of rotating machines theory, rotor types, rotor slip and principles of operation, equivalent circuit, torque-speed characteristics
  • Three phase induction motors types, construction, principle of operation, characteristics and applications
  • Three phase synchronous motors construction and characteristics
  • Starting of induction motors and associated techniques, accelerating and soft starters
  • Speed control requirements of AC motors and load matching
  • Medium voltage three phase induction motors

Day Two: Drives-Introduction

  • Variable speed drive motors verses general purpose motors, VSD selection
  • Reasons and advantages of variable speed drives, DC drive and AC drive comparisons, VFD curves and tests
  • Variable speed drives basic theory, voltage source inverter, current course inverter and pulse width modulation
  • Variable speed drives disadvantages, harmonics mitigation
  • Choosing the best variable frequency drives and installation considerations
  • Variable speed drives parameter programming and applications

Day Three: Drives Fundamentals

  • 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
  • Operations of DC link energy and inverters, regeneration or dynamic slowdown, dynamic breaking, plugging
  • 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
  • AC drive line power factor, insulation voltage stress, electromagnetic interferences (EMI), EMI filtering, VFD shielded cables

Day Four: Troubleshooting and Maintenance of Drives

  • Variable speed drives generic troubleshooting techniques
  • Variable speed drives modes of operations, converter failures, common failure modes
  • Variable speed drives motor bearing maintenance
  • Testing and identification of failed thyristor and diode
  • Test instruments and VSD analysers
  • Preventative maintenance, approaches, guidelines and scheduling, checking, dynamic and static inspections, detecting phase unbalances, loss of phases, and phase reversal

Day Five: Protection of Motors and Drives

  • Protection of AC motors, requirements, overload protection, Numerical relays for motor and drives protection
  • VFD motor problem areas, voltage on shaft, shaft induced current
  • Variable speed drives modular design and maintenance
  • Methods of preventing bearing failures in VSDs
  • Protection of inverters and electronic converters driving motors
  • Medium voltage variable speed drives and protection


الوقت والتاريخ
الأحد، 27 أكتوبر 2024
البداية - 10:30 م (Asia/Kuwait)
الخميس، 31 أكتوبر 2024
النهاية - 10:30 م (Asia/Kuwait)

إضافة إلى التقويم




احصل على الاتجاه


Seattle international for training

تعرف على آراء الجمهور عن هذه الفعالية، ثم انضم إلى المحادثة.