WIT Press

Driving Equipment With Three-phase Inverters And Asynchronous Traction Motors For Trolleys And Trams


Free (open access)

Paper DOI






Page Range

561 - 572




557 kb


V. Radulescu, I. Strainescu, L. Moroianu, S. Gheorghe, E. Tudor, V. Lupu, F. Bozas, A. Dascalu, G. Mitroi & D. Braslasu


The company ICPE SAERP S.A. is the main producer of electric drives for urban traction and for railway vehicles in Romania. The products of our company are subject to the last 48 years of permanent evolution, based on the semiconductor’s development and of the microprocessors control techniques. The improvement of the passenger’s comfort and the downsizing of the exploitation costs is a must for public transportation companies, relating to trolleybuses and trams. Both can be achieved by using modern electric drives (DC choppers or three-phase inverters), which can reduce power consumption and increase control of the vehicle. The main products for electric traction are: drives for traction motors of the vehicles (DC choppers for DC series motors and three-phase inverters for asynchronous and for synchronous motors) and converters for auxiliary services of the vehicles with two development directions, battery chargers (DC converters) for drive supply (24Vdc or 110Vdc) and threephase inverters for auxiliary asynchronous motors (steering, compressor). ICPE SAERP SA has delivered 310 pcs. traction equipment with DC chopper with GTO thyristors or IGBT transistors that equip the trolleybuses from Astrabus srl Arad for the final customers RAT Bucharest, Transurb Galaţi and Ratuc Cluj – Napoca. This paper presents driving equipment with three-phase inverters for asynchronous motors for trolleys and trams that ICPE SAERP has delivered in the past three years. The paper also presents the equipment’s performances, the analysed principle for electrical power diagrams. Keywords: three-phase inverter, asynchronous traction motor, electrical vehicle.


three-phase inverter, asynchronous traction motor, electrical vehicle