Nova Corporation of Alberta

Nova Gas Transmission Ltd.

Theodor Bardas

Cal Oleksuk

Vaclav Kulle

Tim Harris

Gordon Brailean

Timothy Andrew Harris

John Geerligs

Gyula Eisenbart

Jules Eisenbart

A displacement transducer suitable for use in a magnetic bearing measures the flux density between a pair of components and divides a signal indicative of the magnetomotive force between the components by the flux density signal to obtain a signal indicative of displacement.

Magnetic displacement transducer with saturation compensation

A rotary electrical machine comprises a rotor assembly and a stator assembly separated by an air gap. The stator is formed from discrete generally pie-shaped pole pieces having a progressively increasing radial slot to accommodate winding of the coil. The pole pieces are preferably wound from a grain oriented ferromagnetic tape to improve the permeability of the pole and its saturation level. Groups of poles may be separated into sectors. In an alternative embodiment, at least some of the pole pieces are formed from both a permanent magnet and ferromagnetic tape to provide a constant bias between the rotor and stator assemblies.

Sectoral core for magnetic bearing

A magnetic bearing has a number of pole pieces disposed about the circumference of the shaft supported by the bearing. To inhibit magnetic flux migration within the bearing, magnetic barriers of non-magnetic material are interposed between pole pieces at selected locations. Magnetic guides prevent magnetic saturation of the bridging portion of the pole pieces prior to the poles' saturating.

Flux control techniques for magnetic bearing

Growing community of inventors

Calgary, Canada

Theodor Bardas