Title :
Comparative analysis of two zero-current switching isolated dc-dc converters for auxiliary railway supply
Author :
Deblecker, O. ; Moretti, A. ; Vallée, F.
Author_Institution :
Electr. Eng. Div., Fac. Polytech. de Mons, Mons
Abstract :
In modern railways coaches, the electrical separation between the high voltage side and the auxiliary equipments on the consumer side is realized by means of heavy and bulky 50 Hz transformers. In order to reduce the weight and size of the devices, today new power supply systems are proposed that consist in soft-switched isolated dc-dc converters with a lightweight medium frequency transformer and diverse output modules supplied by a common 600 V dc intermediate circuit. This paper aims to investigate in detail two such solutions of isolated dc-dc converters for auxiliary railway power supply where zero-current transitions are achieved for the primary inverter switches. A comparison based on several criteria (overall power rating, losses in power semiconductor devices, operation in the whole range of load, etc.) is presented.
Keywords :
DC-DC power convertors; invertors; power transformers; railway electrification; zero current switching; auxiliary railway supply; comparative analysis; electrical separation; lightweight medium frequency transformer; power supply systems; primary inverter switches; railways coaches; zero-current switching isolated dc-dc converters; zero-current transitions; Circuits; DC-DC power converters; Frequency conversion; Frequency diversity; Inverters; Power supplies; Rail transportation; Switching converters; Transformers; Zero current switching; Auxiliary power supply; dc-dc converters; railway traction; soft-switching;
Conference_Titel :
Power Electronics, Electrical Drives, Automation and Motion, 2008. SPEEDAM 2008. International Symposium on
Conference_Location :
Ischia
Print_ISBN :
978-1-4244-1663-9
Electronic_ISBN :
978-1-4244-1664-6
DOI :
10.1109/SPEEDHAM.2008.4581237