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 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 (250, 251) configured to filter at least one of the first DC voltage and the second DC voltage, and wherein the tunable notch filter (250, 251) is tunable in response to a rotational velocity of the rotor; wherein the tunable notch filter comprises: a capacitor; and a variable inductor; 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, wherein the secondary winding of the variable inductor 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 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 (250, 251) configured to filter at least one of the first DC voltage and the second DC voltage, and wherein the tunable notch filter (250, 251) is tunable in response to a rotational velocity of the rotor; wherein the tunable notch filter comprises: a capacitor; and a variable inductor; 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; and a variable inductor; 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, wherein the secondary winding of the variable inductor is configured to receive the current from a power supply via the H-bridge.