| Abstract |
The launch of an integrated public transport system
in large towns and surrounding areas (e.g. in Kraków and its
conurbation) requires the railway network and tram network to
be combined with a sufficient number of link points. The
operation of such an integrated system will also require modern
dual-system tramcars. As there is a difference in voltage
between the two overhead supply systems, it is necessary to build
a converter enabling tramcars to run on two different traction
voltages, 3000VDC and 600VDC. This article sets out a proposed
solution like that, based on a step-down multiphase converter.
In addition, the article discusses the results of testing carried out
on a low voltage laboratory model of a step-down multiphase
converter that was designed and built to operate with a supply
voltage of 300V, with a DC series motor designed for voltage of
48V/87A serving as load. Moreover, it is worth remembering
that this article discusses the results of further research into
power supplies for two-system trams and should be considered
as a continuation of the work described in [6],[7]. |
