February 2010 Modern VVVF Drives
SPECIAL NOTICE: Please check each course for verification of approval before purchasing.
This test is based on the article, Modern VVVF Drives, published in the February 2010 issue and counts as two contact hour (0.2 CEU) of elevator-industry continuing-education credit. Most courses are 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:
- Types of VVVF drives
- The comparison of a VVVF inverter to a vector drive
- Power consumption of AC-VVVF drives
- The sizing of a drive
- Advantages of a DC drive unit
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