2014 February VF Drives
SPECIAL NOTICE: Please check each course for verification of approval before purchasing.
This test is based on the article, VF Drives, published in the February 2014 issue and counts as one contact hour (0.1 CEU) of elevator industry continuing education credit. Most courses approved by NAEC for CET/CAT and NAESAI for QEI and in the following states: Alabama, Arkansas, Colorado, Florida, Georgia, Illinois, Indiana, Kentucky, Maryland, Mississippi, Missouri, Oklahoma, Pennsylvania, Vermont, Virginia, Washington, West Virginia, Wisconsin.
Learning Objectives - After reading this article, you should have learned about:
- Why the electric motor dominated elevator applications
- The relative advantages of DC and AC motors
- How synchronous and asynchronous motors compare
- The basic parts of a variable-frequency (VF) drive
- How to use a multimeter to troubleshoot a VF drive
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