Rotor Bearing Solutions International

In our previous post, we discussed the importance of proper auxiliary bearing design for active magnetic bearing supported rotors.  The auxiliary bearing system protects vital machine components from damage in case of loss of power in the active magnetic bearings. The previous post provided some insights into the detailed analysis required to properly model the […]

Active magnetic bearing systems have many advantages for rotating machinery.  However, one of the drawbacks is potential loss of levitation due to loss of power in the active magnetic bearing system.  The rotor then drops, and an auxiliary bearing system is needed to protect vital system components from damage. Auxiliary bearing  systems usually consist of […]

RBSI has been working with Kinetic Traction Systems to develop a custom five-axis active magnetic bearing system for a turbo-aerator.  The aerator is designed to operate from 16,000 to 25,000 rpm, allowing for recovery of up to 135 kW of electric power.  The design inlet conditions are 112 m3/min of gas at an inlet pressure […]

Active magnetic bearing systems have many advantages – reduced power consumption compared to fluid film bearings, high reliability, elimination of oil supply systems, diagnostic capabilities, long-term reduced operating costs, and many more.  However, one of the challenges justifying active magnetic bearing selection in new designs is the up-front cost. RBSI has developed new active magnetic […]

A few years ago, members of the RBSI team were looking for a way to explain magnetic bearing controls to mechanical engineers that may not have a deep controls background.  We decided to write a paper on an active magnetic bearing supported rigid rotor using proportional-derivative (PD) controls.  By using this method, we could recast […]