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  1. Absopulse
22 October 2019

ABSOPULSE’s 50W, 750Vdc Input Railway DC-DC Converter Delivers High MTBF

ABSOPULSE Electronics has released the HVI 41R-F1, a 50W addition to its line of high input voltage railway quality DC-DC converters.

The converter employs the latest silicon carbide (SiC) semiconductor technology to deliver high conversion efficiency, high power density and a smaller form factor than similar designs with the same output power.

The HVI 41R-F1 converter operates from 750Vdc (525V to 975Vdc), the traction voltage required for mass transit vehicles including trams, metros and light rail, mining locomotives and trolleybuses. It also incorporates a surge withstand capacity of 1300Vdc. The unit delivers 24Vdc/2A regulated output. Custom input / output values are available on request.

The converter is designed for an operating life of up to 30 years. The elimination of optocouplers from the feedback loop contributes to significantly lower component count and higher MTBF compared to conventional designs.

The HVI 41R-F1 meets the requirements of EN 50155 for electronic equipment used on rolling stock including EN 61000-4-2, EN 61000-4-3, EN 61000-4-4 and EN 61000-4-6 standards. Heavy filtering on the input and output ensures compliance with EN 50121-3-2. Please consult the company regarding compliance to any other standards not listed here.

The 50W converter is cooled by conduction via baseplate. Additional cooling is achieved by natural convection through the cooling slots. No fan cooling is required. This enables operation over a -25°C to 55°C temperature range for full specification. Wider temperature ranges are available on request. The unit is ruggedised to ensure immunity to shock and vibration. The internal boards are conformal coated for protection from moisture, humidity and airborne contaminants.

ABSOPULSE Electronics is an original equipment manufacturer (OEM) specialising in the design and manufacture of an extensive range of custom railway and industrial quality power conversion solutions. All existing designs can be modified to meet customer application requirements.

Please contact the company for further information on this and similar designs, for pricing and delivery.

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