PROCÉDÉ POUR FAIRE FONCTIONNER UN DISPOSITIF D'ALIMENTATION EN ÉNERGIE, DISPOSITIF D'ALIMENTATION EN ÉNERGIE ET SYSTÈME DE TRAITEMENT À HAUTE FRÉQUENCE
An operation method of an electric power source device (200) for operating a high-frequency treatment instrument (100) configured to perform a high-frequency treatment on a biological tissue includes causing a high-frequency electric power source circuit to output electric power (S201); acquiring an initial impedance value in a first period from a start of the output (S202); determining an increase rate of an output voltage relative to time (S301); increasing the output voltage of the high-frequency electric power source circuit in accordance with the increase rate in a second period (S302); acquiring the value relating to impedance of the biological tissue in the second period (S303); and terminating the second period after the value relating to the impedance reaches a minimum value (S304).