Catcher bearings (CB) are an essential component for rotating machine with active magnetic bearings (AMBs) suspensions. The CB’s role is to protect the magnetic bearing and other close clearance component in the event of an AMB failure. The contact load, the Hertzian stress, and the sub/surface shear stress between rotor, races, and balls are calculated, using a nonlinear ball bearing model wit...

.Abstract – The goal of this research was to evaluate the potential of homopolar electrodynamic magnetic bearings for flywheel energy storage systems (FESSs). The primary target was a FESS for Low Earth Orbit (LEO) satellites, however, the design can also be easily adapted for Earth-based applications. The main advantages of Homopolar Electrodynamic Bearings compared to more conventional Active...

A rotor is never free from vibration owing to constant centrifugal force acting on it while rotating. practical has inherent mass unevenness flaw, or bearing misalignment self-weight bow presence of discontinuity cracks flaw. If the vibrations are not controlled within limits, rotor’s purpose existence lost. These can be synchronous if frequency equal to, multiple of, speed rotation rotor. Or m...

An active magnetic bearing (AMB) is an evolving research topic in the industry. Compared to conventional approach, AMB more advantageous and has different industrial applications. The design of this needs be improvised get optimized performance. This leads us focus on better-designed structure actuator, which plays essential role Thus manuscript, we have designed compared I-type U-type actuator...

This paper focuses on the synchronous vibration suppression of an active magnetic bearing (AMB) system without a rotating speed sensor. One most intractable problems with AMB systems is caused by mass imbalance rotor. Moreover, practically all existing unbalance control algorithms require sensor to determine rotation speed. However, in some unique applications, it impossible install and use as ...

In the rotating machinery sector, active magnetic bearing (AMB) has drawn great attention due to its benefits over conventional system. The high-speed technology is enhanced by AMBs, which also reduce maintenance costs and eliminate friction loss. This paper presents a unique, simpler, efficient design hardware implementation for applications using two-coil I-type bearings. To maintain 10 mm ai...

Non-contact rotor position sensors are an essential part of control systems in magnetically suspended high-speed drives. In typical active magnetic bearing (AMB) levitated machine applications, the displacement mechanical air gap is measured with commercially available eddy current-based sensors. The aim this paper to propose a robust and compact three-dimensional sensor that can measure AMB sy...

A new cylindrical capacitive sensor (CCS) design for the displacement measurement of precision active magnetic bearing (AMB) spindle is presented in this paper. This research is motivated by the problem that the existing 4-segment CCS is still sensitive to the third harmonic component of the geometric errors of a rotor. The procedure of designing a new CCS starts from the modeling and error ana...

The main goal of this research is to identify the system parameters of the dynamics of Rotor/Active Magnetic Bearing (Rotor/AMB) system employed in turbo molecular pumps (TMPs). The identification approach adopted in this work is based on experimental analysis and the application of Fuzzy Logic Adaptive ControlExtended Kalman Filter (FLAC-EKF). The estimation error for either system state or sy...