Abstract
In an axial-field vertical-shaft hydro-electric generator, magnetic pull can be utilized to support the rotating body and provide smooth starting and stopping. The magnetic flux densities in the generator's upper and lower airgaps are purposely made unequal by injecting unequal currents in its two field windings. In addition to other advantageous features which also justify the axial-field configuration, the floating rotor principle greatly simplifies the construction of the thrust bearing and its auxiliary mechanical system. Operations of turbine-generator sets will no longer be restricted by their bearing temperature as they are now with conventional units. An experimental machine was designed, constructed and tested.
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