Nov. 2009 An Introduction to Permanent-Magnet
SPECIAL NOTICE: Please check each course for verification of approval before purchasing.
This test is based on the article, An Introduction to Permanent-Magnet Gearless Motors and Drive Control Systems, published in the November 2009 issue and counts as 1 Contact Hour (0.1 CEU) towards recertification. 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 about the:
- Benefits of PMs: efficiency and potential regen applications
- Difference between AC asynchronous induction and PM synchronous gearless motors
- Similarity of commutation between DC and PM AC machines
- Importance of synchronism
- Encoder feedback: absolute position, resolution and technique
- Ride quality control: why more adjustment is needed
- If you do not already have an account on elevatorbooks.com, you will need to create one. NOTE: the name of the person purchasing must be the same name as the person who will take the exam.
- For articles, click the "Read Article" tab above to download and study the article. For other courses, be sure to purchase the corresponding book.
- Include your full name when purchasing the exam.
- Follow the instructions on the purchase confirmation page to log in to the Online Testing Center.
- If you scored 80% or above, you can immediately print your certificate of completion. If you fail the exam, you will be given instructions on how to pay a re-take fee and take the exam again.