id excitation synchronous machines are electric machines with two excitation circuits, one with permanent magnets and another wound. The study presented in this paper discusses operation characteristics of a hybrid excitation alternator connected to a diode rectifier with a resistive load. A parametric study is undertaken to evaluate the effect of hybrid excitation alternator parameters on the full load performances. Particular attention is devoted to the influence of hybridization ratio on the generation system’s global efficiency. The hybridization ratio is a particular parameter of hybrid excitation machines. It reflects the ratio between the permanent magnets excitation flux and the wound excitation flux. Measurements on a hybrid excitation alternator allow validating the parametric study and show improvement brought by hybrid excitation.
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