A power generation system for a DC network with a load, such as a radar antenna or energy laser system, the power generation system being suitable for providing 100kW or more and being configured to be boarded on an aircraft, the power generation system comprising: - a non-propulsive mechanical power source for generating rotating mechanical power, - a permanent magnet generator, PMG, for converting the rotating mechanical power generated by the non-propulsive mechanical power source to AC electrical power, the PMG comprising at least one winding and being mechanically connected to the non-propulsive mechanical power source without a gearbox between the non-propulsive mechanical power source and the PMG, wherein the PMG is configured to rotate according to the rotational speed of the non-propulsive mechanical power source, - a voltage rectifier unit, HVRU, for converting the AC electrical power to DC electrical power, the HVRU comprising an AC electrical power input and a DC electrical power output, and - a control unit for controlling the rotational speed of the power source and for controlling the HVRU, wherein the HVRU is configured to make use of the at least one winding of the PMG for increasing the voltage of the DC electrical power output such that internal inductances of the PMG are used as part of the HVRU; the PMG comprises a position sensor in data communication with the HVRU for monitoring the position of the at least one winding of the PMG to provide information of the most efficient points of PMG operation; the HVRU comprises: a controlled bridge comprising antiparallel diodes and IGBT Transistors, the controlled bridge being configured to convert the AC electrical power input into rectified electrical power output, a Radio Frequency, RF, filter for filtering the rectified electrical power output, obtaining a DC electrical power output, processing means in data communication with the controlled bridge, the RF filter and the control unit, and IGBT drivers configured to control the status of the IGBT Transistors; and wherein internal inductances of the PMG are used as part of the HVRU and the winding of the PMG is configured to energize the controlled bridge in such a way that the voltage of the DC electrical power output fed by the HVRU is increased. - a non-propulsive mechanical power source for generating rotating mechanical power, - a permanent magnet generator, PMG, for converting the rotating mechanical power generated by the non-propulsive mechanical power source to AC electrical power, the PMG comprising at least one winding and being mechanically connected to the non-propulsive mechanical power source without a gearbox between the non-propulsive mechanical power source and the PMG, wherein the PMG is configured to rotate according to the rotational speed of the non-propulsive mechanical power source, - a voltage rectifier unit, HVRU, for converting the AC electrical power to DC electrical power, the HVRU comprising an AC electrical power input and a DC electrical power output, and - a control unit for controlling the rotational speed of the power source and for controlling the HVRU, the HVRU is configured to make use of the at least one winding of the PMG for increasing the voltage of the DC electrical power output such that internal inductances of the PMG are used as part of the HVRU; the PMG comprises a position sensor in data communication with the HVRU for monitoring the position of the at least one winding of the PMG to provide information of the most efficient points of PMG operation; the HVRU comprises: a controlled bridge comprising antiparallel diodes and IGBT Transistors, the controlled bridge being configured to convert the AC electrical power input into rectified electrical power output, a Radio Frequency, RF, filter for filtering the rectified electrical power output, obtaining a DC electrical power output, processing means in data communication with the controlled bridge, the RF filter and the control unit, and IGBT drivers configured to control the status of the IGBT Transistors; a controlled bridge comprising antiparallel diodes and IGBT Transistors, the controlled bridge being configured to convert the AC electrical power input into rectified electrical power output, a Radio Frequency, RF, filter for filtering the rectified electrical power output, obtaining a DC electrical power output, processing means in data communication with the controlled bridge, the RF filter and the control unit, and IGBT drivers configured to control the status of the IGBT Transistors; and wherein internal inductances of the PMG are used as part of the HVRU and the winding of the PMG is configured to energize the controlled bridge in such a way that the voltage of the DC electrical power output fed by the HVRU is increased.