Magnetics Business & Technology - Spring 2016 - (Page 30)

SPONTANEOUS THOUGHTS a Column by Dr. Stan Trout Seventeen Mistakes People Make with Permanent Magnets A couple of months ago, I published a list of 12 mistakes people make with magnets on LinkedIn, see the link below. I asked people to tweak the points or add to the list. My readers came up with five additional mistakes and made some nice adjustments to the topics, generally making them a bit broader. So I publish the current list below, along with the same request. Please feel free to add to the list or propose adjustments to the mistakes. My goal is to make the list as complete as possible. Over the next few months, I will write a series of articles about them for Magnetics Business & Technology magazine, filling in some of the details. 1. Overlooking thermal properties 2. Failing to saturate fully or correctly 3. Failing to protect from corrosion 4. Failing to optimize the design to use the least amount of material 5. Believing that magnets do not require any special expertise to produce or use 6. Designing a product with a non-existent material 7. Assuming that cost is only from raw materials, or an easy to use $/kg figure, independent of quantity or complexity 8. LinkedIn article can be found here: Use the QR Code or this URL: http://bit.ly/1PJpa2q Changing the grade without considering the rest of the magnetic circuit 9. Specifying the magnet incorrectly or incompletely 10. Using the wrong adhesive 11. Measuring the wrong parameters 12. Failing to consider recycling in the design stage 13. Assuming that large magnetized parts are easy and safe to handle 14. Failing to consider natural product variations in both magnetic properties and dimensions 15. Assuming that the attractive and repulsive forces are equivalent and can be precisely calculated 16. Ignoring appropriate mechanical considerations: such as using a magnet as a structural part, believing that chips and cracks are not normal for brittle materials, or ignoring the effect of magnetic debris 17. Treating magnets as toys That's my project for 2016! About the Author - Dr. Stan Trout has more than 40 years' experience in the permanent magnet and rare earth industries. Dr. Trout has a B.S. in Physics from Lafayette College and a Ph.D. in Metallurgy and Materials Science from the University of Pennsylvania. Stan is a contributing columnist for Magnetics Business & Technology magazine. Spontaneous Materials, his consultancy, provides practical solutions in magnetic materials, the rare earths, technical training and technical writing. He can be reached at strout@ieee.org. 30 Magnetics Business & Technology * Spring 2016 www.MagneticsMagazine.com http://www.bit.ly/1PJpa2q http://www.MagneticsMagazine.com http://www.MagneticsMagazine.com

Table of Contents for the Digital Edition of Magnetics Business & Technology - Spring 2016

Editor's Choice
Permanent Magnets in a Changing World Market
Design Considerations Using Permanent Magnets
Insulated Iron Powders, SMC, Current State and Future Possibilities
Research & Development
The Design of a Permanent Magnet Motor for a Direct Drive Fan Application
Tailoring of Pole Shapes of Multipolar Injection Molded Magnets
Electromagnetics
Industry News
Marketplace / Advertising Index
Spontaneous Thoughts: Seventeen Mistakes People Make with Permanent Magnets

Magnetics Business & Technology - Spring 2016