Whirling of Unsymmetrical Rotors Supported by Magnetic Bearing

Some Insights into the Simultaneous Forward and Backward Whirling of Rotors

One of the greatest advantages of using complex coordinates in the study of rotating machinery is the gain of physical insight into the forward and backward precessional modes. Together with the complex modal analysis formulation, other interesting tools (like the Shape and Directivity Index Plot) were developed to characterize the shape and directivity of the whirl modes. These tools are helpf...

Spin Stabilized Magnetic Levitation of Horizontal Rotors

In this paper we present an analysis of a new configuration for achieving spin stabilized magnetic levitation. In the classical configuration, the rotor spins about a vertical axis; and the spin stabilizes the lateral instability of the top in the magnetic field. In this new configuration the rotor spins about a horizontal axis; and the spin stabilizes the axial instability of the top in the ma...

Use of Ansoft to Model a Slice Magnetic Bearing

Maxwell 3D of Ansoft software were used for this study. Ansoft’s solutions are based on a more general program using Maxwell’s equations. A simple analysis has been done for calculating the magnetic force interacted between two magnets of similar poles facing each other. The modeling in Anosoft has been described.

Salmonid Whirling Disease

Combination Radial-axial Magnetic Bearing

The design and application of a patented active actuator design that combines the radial and axial actuator into one combination radial-axial actuator is presented. The theory of operation of the actuator is defined and magnetic finite element analysis modeling shown verifying operation. Its mechanical construction is then presented to show how this actuator configuration is successfully integr...