The SFA-TR-100 is an IGBT based DC chopper especially designed for driving traction motors in Tehran Metro trains. The converter is powered from the 750 VDC line and supplies two DC traction motors with the high performance speed and torque control characteristics. The converter is equipped with an advanced anti-slip/slide control algorithm which enables the performance of the drive with the regulated torque in the acceleration and deceleration modes with the regenerative and dynamic braking capabilities down to very low speeds. The converter is designed to be mounted under the coach frame. This product is under development by Sadrafan Pardaz R&D section for the future release.