In 1974 FRIEM started the production of Air-Cooled Diode Rectifiers for Train, Metro and Tram Lines.
Nowadays FRIEM provides a wide range of Power Converters based on diode, thyristor and IGBT technologies for rail and urban electrification, taking care of the whole project from the engineering to the start-up of the delivered equipment.
Enhancement of rail and urban electrification systems is nowadays dominant topic in terms of investment to reduce environmental pollution and improve energy saving.
FRIEM has developed a comprehensive line of Power Converters that enable metro and train lines to generate energy. The energy is recovered during the vehicle breaking and re-used by other loads or stored in battery and capacitors.