Dave Griffiths

Course overview

Fundamentals of variable speed drives course includes: 1. A review of Single and Three Phase electrical power 2. A review of the fundamentals of magnetism. 3. Electric motor basic operating principals, design and construction. 4. A review of NEMA Frame information and construction. 5. A review of Environmental factors. 6. A review of driven loads characteristics. Constant torque and Variable torque etc. 7. Service Factor definition. 8. Bearing fundamentals. 9. A review of the operation of semi conductor devices including SCR's, Diodes and IGBT's 10. NEMA enclosure definitions 11. Architecture of Soft starts and their operating principals 12. Architecture of variable speed drives and their operating principals 13. PWM output wave form advantages and and considerations for Motors and Motor bearings. 14. Shaft Currents, inductive coupling, capacitive coupling, arcing damage and prevention. 15. Variable Speed Drive programming 16. Variable Speed Drive trouble shooting 17. Variable speed drive Static testing 18. Harmonic basics; IEEE519, THD, TDD. 19. Harmonic mitigation design. 20. Hands on programming on Demo 21. Hands on trouble shooting on Demo 22. Final quiz