Low speed doubly salient permanent magnet generator with passive rotor for a tidal current turbine

This paper presents a low speed permanent magnet generator that can be associated with a tidal turbine. This structure has a passive rotor which leads to a simple and robust structural solution. The principle of operation and an electromechanical model of this machine are presented. The use of this model is based on the accurate calculation of inductances in operating condition including saturation regime. An original method for determining these inductances is then presented. This original method allows predicting more precisely the behavior of the generator.