Download or read book Magnetic Bearing Amplifier Output Power Filters for Flywheel Systems written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-20 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Five power filters and two types of power amplifiers were tested for use with active magnetic bearings for flywheel applications. Filter topologies included low pass filters and low pass filters combined with trap filters at the PWM switching frequency. Two state and three state PWM amplifiers were compared. Each system was evaluated based on current magnitude at the switching frequency, voltage magnitude at 500 kHz, and power consumption. The base line system was a two state amplifier without a power filter. The recommended system is a three state power amplifier with a 50 kHz low pass filter and a 27 kHz trap filter. This system uses 5.57 W. It reduces the switching current by an order of magnitude and the 500 kHz voltage by two orders of magnitude. The relative power consumption varied depending on the test condition between 60 to 130 percent of the baseline. Lebron-Velilla, Ramon C. and Jansen, Ralph H. and Palazzolo, Alan and Thomas, Erwin and Kascak, Peter E. and Birchenough, Arthur G. and Dever, Timothy P. Glenn Research Center NASA/TM-2003-212510, E-14070, NAS 1.15:212510

Download or read book Second International Symposium on Magnetic Suspension Technology written by Nelson J. Groom and published by . This book was released on 1994 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magnetic Bearings Magnetic Drives and Dry Gas Seals Conference written by and published by CRC Press. This book was released on 1993 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Proceedings of the 27th Intersociety Energy Conversion Engineering Conference Energy systems new technologies written by and published by . This book was released on 1992 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Second International Symposium on Magnetic Suspension Technology Part 2 written by and published by . This book was released on 1994 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rotordynamics 92 written by Michael J. Goodwin and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designers and operators of rotating machinery have to deal with the effects of machine vibration and wear. The increasing demands for quieter machine operation, longer machine life and a greater efficiency of operation have led to the use of sophisticated design aids. Research into rotating machinery is therefore of substantial and increasing importance. Rotordynamics '92 provides a record of some of the most recent research methods and results relating to the design and operation of rotating machinery. The conference is international in character and draws on research from a wide range of respected sources.

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Download or read book Magnetic Bearings written by Gerhard Schweitzer and published by Springer Science & Business Media. This book was released on 2009-06-10 with total page 541 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compiling the expertise of nine pioneers of the field, Magnetic Bearings - Theory, Design, and Application to Rotating Machinery offers an encyclopedic study of this rapidly emerging field with a balanced blend of commercial and academic perspectives. Every element of the technology is examined in detail, beginning at the component level and proceeding through a thorough exposition of the design and performance of these systems. The book is organized in a logical fashion, starting with an overview of the technology and a survey of the range of applications. A background chapter then explains the central concepts of active magnetic bearings while avoiding a morass of technical details. From here, the reader continues to a meticulous, state-of-the-art exposition of the component technologies and the manner in which they are assembled to form the AMB/rotor system. These system models and performance objectives are then tied together through extensive discussions of control methods for both rigid and flexible rotors, including consideration of the problem of system dynamics identification. Supporting this, the issues of system reliability and fault management are discussed from several useful and complementary perspectives. At the end of the book, numerous special concepts and systems, including micro-scale bearings, self-bearing motors, and self-sensing bearings, are put forth as promising directions for new research and development. Newcomers to the field will find the material highly accessible while veteran practitioners will be impressed by the level of technical detail that emerges from a combination of sophisticated analysis and insights gleaned from many collective years of practical experience. An exhaustive, self-contained text on active magnetic bearing technology, this book should be a core reference for anyone seeking to understand or develop systems using magnetic bearings.

Download or read book Vibrations in Rotating Machinery written by and published by . This book was released on 1988 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book 1988 IECEC July 31 August 5 Denver Colorado written by and published by . This book was released on 1988 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt: