Abstract
This paper describes a prospective design concept of a hard switching input voltage stabilizer for the auxiliary drives converters of dc catenary fed light traction vehicles. Auxiliary drives are mostly dedicated to generate standard power grid that supplies various on-board equipment and charging on-board batteries. The input voltage stabilizer (IVS) is the first input block of auxiliary drives. This block defines the voltage level of the consequent dc/dc isolated converter (IC). The main aim of this paper is to present the reader with the design of a low-cost variant of the voltage stabilizer. The described input voltage stabilizer is designed as a buck (step-down) or boost (step-up) converter, operating with an input catenary voltage range of 400 (VDC) to 950 VDC. The new fast, discrete IGBT H3 transistors and SiC diodes allow switching frequency from 20 kHz to 30 kHz in a hard switching mode with power rated up to 22 kW. DOI: http://dx.doi.org/10.5755/j01.eee.21.6.13752
Highlights
This research has been motivated by our industrial partner with the aim of developing a new generation of electric equipment for light traction vehicles
One part of light rail vehicles' electric equipment is the traction converter for auxiliary drives which consists of input voltage stabilizer (IVS) and the dc/dc isolated converter, which operates at high switching frequencies and under hard switching conditions
The dc catenary voltage range of light traction vehicles may vary between 400 VDC – 950 VDC for rated catenary voltage 600 VDC and 750 VDC
Summary
This research has been motivated by our industrial partner with the aim of developing a new generation of electric equipment for light traction vehicles (mainly mass transport vehicles like trolley buses and trams). One part of light rail vehicles' electric equipment is the traction converter for auxiliary drives which consists of input voltage stabilizer (IVS) and the dc/dc isolated converter, which operates at high switching frequencies and under hard switching conditions. The auxiliary drives are an integrated part of light traction vehicles. They are mostly used for generating a standard power grid which supplies various on-board equipment and charges on-board batteries. The auxiliary drives are designed while taking into consideration the voltage range of the DC catenary. The dc catenary voltage range of light traction vehicles may vary between 400 VDC – 950 VDC for rated catenary voltage 600 VDC and 750 VDC
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