Plant Services - October 2007 - (Page 72)

WEB HUNTER sheets, seven in number, address voltage imbalance, nuisance tripping and extending a motor’s useful life. What I thought was most interesting was the tip sheet about estimating motor efficiency in the field, which highlights four ways to measure the five major losses associated with reduced motor efficiency. There also are links to case studies and at least five of the 11 shown involve motors. The 14 technical publications from several sources are predominately about motors. Finally, there are links to material about four motor software packages. This trove is yours for the asking. Simply go to www1.eere.ener gy.gov/industry and click on “Best Practices” in the middle column. When the page loads, aim for “Motors, Pumps, and Fans” found under the “Energy System Links” heading. There’s a lot here, so you might want to return when you need information about something other than motors. take on the matter in a brief piece you’ll find at www.idcon. com, where you’re going to select “Reliability Tips” from the drop-down menu that appears under “Resources.” Select the tip dated October 2006. It’s a short article, but the real takeaway is the four-page preventive maintenance standard “Condition Monitoring Standard - AC Motor” that is highlighted in the last paragraph. Flatline power Is motor RCM worthwhile? Applying reliability-centered maintenance to everything in the plant might not be the best use of your collective time, writes Idcon, Inc., a consulting firm in Raleigh, N.C., that focuses on maintenance and operations practices. There are classes of assets for which it makes sense to spend the time and money that a proper RCM program requires, and motors might not be in that number. You can get the company’s More resources at www.PlantServices.com/thismonth Motor brush life – “Brush life in DC motors” Critical mechanical elements – “Building blocks for motors” Single-phase approach – “Getting a handle on single-phase motors” Drive selection – “AC vs. DC” Motor PdM – “Health care for a motor-drive system” Drive harmonics – “Bad vibes – part 1” Drive harmonics – “Bad vibes – part 2” For more, search www.PlantServices.com using the keywords efficiency, motor and drive I’d guess that most of the motors in your plant are either single-phase or three-phase AC units. Being so common, one can almost become familiar with this class of machine through osmosis. But, industry also uses DC motors in a variety of configurations for specific applications. That’s why I point out “Electric Motors 101,” an element of the Electric Motors Reference Center, which comes to you from a trade magazine called Machine Design. In addition to material about AC motors, this is where you can learn about DC motors of all types: brushless, permanent magnet, coreless and linear. You might not become an instant expert, but you’ll get a good grounding in the fundamentals of this class of prime movers. The section about selecting a DC motor walks you through the basic calculations you’ll need to get it right the first time. All you need do is plug that mouse into www.electricmotors.ma chinede sign.com. Speaking of DC motors, they don’t need to be nearly as complex as you might think they ought to be, according to Kinetic MicroScience, Los Gatos, Calif. The company offers you step-by-step instructions for building a functional DC motor using items you probably have in your maintenance shop. I’m not going to belabor the point because its simplicity is self-evident if you tool over to http://scitoys. com and click on “An electric motor in 10 minutes.” E-mail Executive Editor Russ Kratowicz, P.E., CMRP, at russk@putman.net. If you’re not a subscriber to SKF @ptitude Exchange, you’re not seeing the depth of our support. Put 100 years of SKF experience – and that of our alliance partners – on your desktop. As a subscriber, you can access hundreds of articles, technical handbooks, industrial product guides, training courses, expert systems, and much more. To download a FREE article entitled “Intellectual Asset Management; The Next Generation,” visit http://is.aptitudexchange.com/promo/238560 72 www.PLANTSERVICES.com October 2007 http://www1.eere.energy.gov/industry http://www.electricmotors.machinedesign.com http://www.electricmotors.machinedesign.com http://www.PlantServices.com/thismonth http://scitoys.com http://scitoys.com http://www.PlantServices.com http://is.aptitudexchange.com/promo/238560 http://is.aptitudexchange.com/promo/238560 http://www.PLANTSERVICES.com

Table of Contents Feed for the Digital Edition of Plant Services - October 2007

Plant Services - October 2007 Contents Monetize It Letters Step into the Blogosphere What it Takes to be a Leader Up and Running Crisis Corner What Works From the Summit Treat Them Right Access Control Out of the Woods Show Me, Don't Guess Condition Assessment Made Easy The Air Above the Floor Power to the Prime Movers In the Trenches Illuminating Maintenance

Plant Services - October 2007

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