A New Hybrid Synchronous Machine Capable of Ultra-High Output Power

Abstract

This article presents the steady-state performance analysis of a new hybrid polyphase synchronous machine capable of ultra-high power output. The machine comprises a round rotor and a salient-pole rotor which are mechanically coupled together and housed in their respective stators. Each component machine has two identical stator windings, known as the main and auxiliary windings. The main windings are connected in series and tied to an infinite busbar for generator operation, while the auxiliary windings are transposed in passing from one component machine to the other and feed a variable capacitance load. A DC field winding spanning both sections of the machine is mounted on the combined rotors. It is shown that the operational value of ratio of the machine is dependent on the variable capacitance load of the auxiliary windings and varies from zero to infinity and hence the output power which is directly proportional to it. Unlike the conventional synchronous machines where the reluctance component of the output power is invariably very small, compared to the excitation component, the converse is the case in the new hybrid synchronous machine.