By Gerhard Schweitzer (auth.), Eric H. Maslen, Gerhard Schweitzer (eds.)
Compiling the services of 9 pioneers of the sector, Magnetic Bearings - conception, layout, and alertness to Rotating equipment deals an encyclopedic research of this speedily rising box with a balanced mix of business and educational views. each section of the expertise is tested intimately, starting on the part point and continuing via an intensive exposition of the layout and function of those structures. The roster of authors boasts an ordinary of twenty-five years of labor constructing magnetic bearing expertise - a really unheard of pool of experience.
The booklet is equipped in a logical model, beginning with an outline of the expertise and a survey of the diversity of functions. A history bankruptcy then explains the relevant ideas of lively magnetic bearings whereas fending off a morass of technical information. From right here, the reader keeps to a meticulous, state of the art exposition of the part applied sciences and the way within which they're assembled to shape the AMB/rotor method. those method versions and function pursuits are then tied jointly via broad discussions of keep watch over equipment for either inflexible and versatile rotors, together with attention of the matter of process dynamics identity. helping this, the problems of method reliability and fault administration are mentioned from numerous important and complementary views. on the finish of the ebook, a number of certain options and platforms, together with micro-scale bearings, self-bearing cars, and self-sensing bearings, are positioned forth as promising instructions for brand spanking new study and development.
Newcomers to the sector will locate the cloth hugely available whereas veteran practitioners could be inspired by way of the extent of technical element that emerges from a mix of refined research and insights gleaned from many collective years of functional adventure. An exhaustive, self-contained textual content on lively magnetic bearing expertise, this ebook may be a middle reference for an individual looking to comprehend or strengthen platforms utilizing magnetic bearings.
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Extra resources for Magnetic Bearings: Theory, Design, and Application to Rotating Machinery
A consequence of the limited load capacity with PID control is the behavior of an AMB when the external force becomes too large: Up to the load capacity or the maximum allowed integrator state value respectively, the rotor position is kept constant (y = x = r). If the external force exceeds this limit the rotor displacement will suddenly become large, eventually as large as the air gap, and then contact between the rotor and the bearing occurs. To prevent damage to the rotor–bearing system various schemes, such as retainer bearings and touch-down recovery control, have been developed (see Chap.
15. Turboexpander-generator with magnetic bearings for energy recovery from natural gas, 450 kW, 32000 rpm, rotor mass 112 kg, rotor length 1100 mm, bearing diameter 110 mm, high-speed motor with carbon ﬁber reinforcement,  terminal box guide blade adjusting motor pressure-containing cable lead-through pressure-containing machine housing water-cooled rectifier carbon fiber bandage gas inlet synchronous generator magnetic bearing unit (radial and thrust bearing) auxiliary bearing unit turbine gas outlet Fig.
In T. Higuchi, editor, Magnetic Bearings. Proc. Sec. Internat. Symp. on Magnetic Bearings. , July 1990. 41. G. Schweitzer. Stabilization of self-excited rotor vibrations by an active damper. I. Niordson, editor, Proc. IUTAM Symp. on Dynamics of Rotors, Lyngby, August 1974. Springer-Verlag, Berlin. 42. G. Schweitzer, editor. Magnetic Bearings. Proc. First Internat. Symposium on Magnetic Bearings. ETH Zurich, Springer-Verlag, Berlin, 1988. 43. M. Simon and al. Spin stabilized magnetic levitation.
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