Results 11 to 20 of about 30,298 (314)
Radial Magnetic Bearings for Rotor–Shaft Support in Electric Jet Engine
Energies, 2022 New technologies are being developed to elaborate cutting-edge electrical jet engines to replace classical constructions. These new concepts consider the possibility of using electrical machines both as starters and generators, as well as suspension ...
Krzysztof Falkowski +3 more
doaj +1 more source
Dynamics of active magnetic thrust-bearings.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C, 1990 A linearlized model considering the effect of eddy currents is shown to be useful for the analysis of the dynamics of active magnetic thrust-bearings, in which electromagnet cores are composed of solid steel. The dynamics of a magnetic control-force is modeled by the first-order time-lag system with unknown parameters : a gain and a time constant.
Satoru FUKATA +4 more
openaire +3 more sources
Sensors, 2021 Verification of the behaviour of new designs of rotor seals is a crucial phase necessary for their use in rotary machines. Therefore, experimental equipment for the verification of properties that have an effect on rotor dynamics is being developed in ...
Karel Kalista, Jindrich Liska, Jan Jakl
doaj +1 more source
A fractional order PID control strategy in active magnetic bearing systems
Alexandria Engineering Journal, 2018 Active Magnetic Bearings (AMBs) are broadly utilized for high angular speed machines such as turbo-machinery, compressors and high speed motors. In AMBs, the rotating parts run without physical contacts with the moving parts.
Ahmed Mohamed Abdel-Hafez Shata +3 more
doaj +1 more source
Turbomolecular pumps on conical active magnetic bearings
Mechanical Engineering Journal, 2017 The adoption of magnetic levitation is experiencing a steady growth in the vacuum industry and, in particular, in turbomolecular pumps. Nowadays, the most common solutions for pumps of small and medium pumping capacity are based on hybrid architectures ...
Angelo BONFITTO +3 more
doaj +1 more source
High-Precision Roller Supported by Active Magnetic Bearings
Applied Sciences, 2019 Magnetic bearings support rotors in a non-contact way using magnetic force. Therefore, there is no friction and it is possible to measure and control the position of a rotor in the air gap.
Cheol Hoon Park +3 more
doaj +1 more source
An Appraisal of Power-Minimizing Control Algorithms for Active Magnetic Bearings
Shock and Vibration, 2015 Active magnetic bearings consume much less power than conventional passive bearings, especially when power-minimizing controllers are employed. Several power-minimizing controllers have been proposed, such as variable bias controllers and switching ...
Seong-yeol Yoo, Myounggyu D. Noh
doaj +1 more source
Measurement System of a Magnetic Suspension System for a Jet Engine Rotor
Sensors, 2020 This paper presents laboratory results on the measurement system of a magnetic suspension bearing system for a jet engine rotor of an unmanned aerial vehicle (UAV).
Paulina Kurnyta-Mazurek +2 more
doaj +1 more source
Determination of parameters for a design of the stable electro-dynamic passive magnetic support of a high-speed flexible rotor [PDF]
Bulletin of the Polish Academy of Sciences: Technical Sciences, 2019 Electro-dynamic passive magnetic bearings are now viewed as a feasible option when looking for support for high-speed rotors. Nevertheless, because of the skew-symmetrical visco-elastic properties of such bearings, they are prone to operational ...
T. Szolc +3 more
doaj +1 more source
Dynamics of active magnetic bearings.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C, 1987 A simple new model is developed to analyze the dynamics of active magnetic bearings. In the model, the time lag of the flux due to eddy current is considered, but the gyroscopic effect is neglected. Magnetic force is described by the flux instead of the coil current. This description converts the equations of rotor dynamics into a simple form, although
Satoru FUKATA +2 more
openaire +2 more sources