Powered By:
Sponsored By:

This is a review course for the Variable Speed Drives part of the Motors and Drives Section of the CEM Test.
•This course:
   –Gives a detailed and expanded presentation of the second part of the Motors and Drives section of the CEM test.
   –Includes Practice Problems and examples to improve your understanding and increase your problem-solving skills.
–Includes a 20-question Practice Test and a 20-question Proficiency Test to better prepare you for the Variable Speed Drive part of the Motors and Drives Section on the CEM test; and to improve your knowledge base in the area of variable speed drives and their applications in energy management.
•It also contains supplementary materials on the second part of Motors and Drives that the CEM instructors may not have time to cover in the five-day CEM course.

Module Objectives
  • What are variable speed drives (VSDs)?
  • Variable torque applications
  • Constant torque applications
  • Why do VSDs produce such large energy savings?
  • Calculating VSD energy savings
  • Centrifugal fan and pump laws and examples
  • Analysis of potential VSD applications
  • Detailed example of VSD pump savings
  • Systems to control motor speeds
  • Electric Motor Variable Air Volume Applications
  • Performance characteristics of variable speed drive technologies
  • Selection of best VSD technology
  • Variable frequency drives
  • VFD technology components
  • DC converters, DC links, and inverters
  • Six pulse, twelve pulse and 18 pulse converters
  • Six pulse, twelve pulse, 18 pulse, and PWM inverters
  • Diagrams of voltage source inverter VFDs, current source inverter VFDs, and PWM inverter VFDs
  • Vector control VFDs
  • VFD technology selection issues
  • Potential problems with PWM VFDs
  • Areas of concern for VFD applications
  • Harmonics from VFDs
  • VFD harmonic control and mitigation
  • DC converters, DC links, and inverters
  • Six pulse, twelve pulse and 18 pulse converters
  • Six pulse, twelve pulse, 18 pulse, and PWM inverters
  • Diagrams of voltage source inverter VFDs, current source inverter VFDs, and PWM inverter VFDs
  • Vector control VFDs
  • VFD technology selection issues
  • Potential problems with PWM VFDs
  • Areas of concern for VFD applications
  • Harmonics from VFDs
  • VFD harmonic control and mitigation
  • Motor selection issues and installation issues
  • Control systems needed for VFD applications
  • Input data and sensors for VFD applications and control
  • Communication issues
CEM Review Series: Variable Speed Drives for Electric Motors

BARNEY CAPEHART, Ph.D, C.E.M., is a professor emeritus of industrial and systems engineering at the University of Florida, Gainesville. He has broad experience in the commercial/industrial sector, having served as Director of the University of Florida Industrial Assessment Center from 1990 to 1999. He has personally conducted over 100 audits of industrial facilities and has assisted students in conducting audits of hundreds of office buildings, small businesses, government facilities, and other commercial facilities. He is the lead author for the Guide to Energy Management textbook, founding editor of the Encyclopedia of Energy Engineering and Technology, and co-author or editor of five other energy books. Dr Capehart is the creator of AEE's Five Day Training Program for Energy Managers, and has trained over 10,000 energy managers in that program.

Individual topic purchase: Selected
Association of Energy Engineers
CEU: 0.80
PDH: 8.00
AEE Re-certification: 1.60
Share This
Products
AEE Member
AEE Price:$345.00
Non AEE Member
AEE Price:$395.00