This paper presents an indirect rotor-flux-oriented (IRFO) control system of the self-excited inductiongenerator (SEIG) in which excitation is achieved by means of a current-controlled voltage source inverter(CC-VSI) and a single electrolytic capacitor. In the proposed control scheme, both the iron losses and themagnetic saturation are taken into account and calculated online. The main objective is to keep the DCvoltage across the capacitor constant and equal to the reference value, regardless of changes in the rotorspeed and load. The study is mainly focused on the DC voltage control and, more specifically, on selectionof the appropriate DC voltage controller. Besides considering widely accepted types of controllers, i.e., theclassical PI controller and the fuzzy logic (FL) controller, this paper proposes an alternative solution–anew type of DC voltage controller based on hedge algebra. To our best knowledge, this is thefirst time thatsuch a controller is considered for application in electrical engineering. The performance of the developedhedge algebra (HA) controller is evaluated through comparison with the optimal-tuned classical PIcontroller and the Sugeno-type FL controller. The simulation and experimental analysis are carried out inreasonably wide ranges of the DC voltage, load and rotor speed, including the case of a variable rotorspeed. It is shown that the proposed HA controller provides superior performance in terms of tracking thereference DC voltage value as well as robustness to speed and load disturbances in the system.