An electric power generating system, EPGS, comprising, a permanent magnet generator comprising: a rotor ; a stator comprising: a first armature winding configured to output a first three-phase voltage; and a second armature winding configured to output a second three-phase voltage; a passive rectifier configured to rectify the first three-phase voltage received from the first armature winding; an active rectifier configured to rectify the second three-phase voltage received from the second armature winding, wherein the passive rectifier is configured to output a first direct current (DC) voltage and the active rectifier is configured to output a second DC voltage; and wherein the active rectifier and the passive rectifier are connected in series, and characterized by a tunable notch filter configured to filter at least one of the first DC voltage and the second DC voltage, and wherein the tunable notch filter is tunable in response to a rotational velocity of the rotor ; wherein the tunable notch filter comprises: a capacitor (C4); and a variable inductor (L5); and an auto-tuning notch filter control , comprising: a frequency detector adapted to detect the rotational velocity of the rotor; a current regulator ; a pulse width modulator ; and an H-bridge , wherein the auto-tuning notch filter control is adapted to regulate a current through a secondary winding of the variable inductor (L5), wherein the secondary winding of the variable inductor (L5) is configured to receive the current from a power supply via the H-bridge . a rotor ; a stator comprising: a first armature winding configured to output a first three-phase voltage; and a second armature winding configured to output a second three-phase voltage; a first armature winding configured to output a first three-phase voltage; and a second armature winding configured to output a second three-phase voltage; a passive rectifier configured to rectify the first three-phase voltage received from the first armature winding; an active rectifier configured to rectify the second three-phase voltage received from the second armature winding, wherein the passive rectifier is configured to output a first direct current (DC) voltage and the active rectifier is configured to output a second DC voltage; and wherein the active rectifier and the passive rectifier are connected in series, and characterized by a tunable notch filter configured to filter at least one of the first DC voltage and the second DC voltage, and wherein the tunable notch filter is tunable in response to a rotational velocity of the rotor ; wherein the tunable notch filter comprises: a capacitor (C4); and a variable inductor (L5); and an auto-tuning notch filter control , comprising: a frequency detector adapted to detect the rotational velocity of the rotor; a current regulator ; a pulse width modulator ; and an H-bridge , a capacitor (C4); and a variable inductor (L5); and an auto-tuning notch filter control , comprising: a frequency detector adapted to detect the rotational velocity of the rotor; a current regulator ; a pulse width modulator ; and an H-bridge , a frequency detector adapted to detect the rotational velocity of the rotor; a current regulator ; a pulse width modulator ; and an H-bridge , wherein the auto-tuning notch filter control is adapted to regulate a current through a secondary winding of the variable inductor (L5), wherein the secondary winding of the variable inductor (L5) is configured to receive the current from a power supply via the H-bridge . <EOS>