Absopulse - Railway DC/DC Converters, AC/DC Power Supplies and Battery Chargers, Sinewave Inverters, Phase and Frequency Converters, and Complete Power Systems

Since 1982, Absopulse Electronics has specialized in the design, development and manufacture of heavy-duty switching power supplies for railway environments. Today, the company's power conversion products operate in on-board and trackside electronic systems in major railway projects around the world. These include light rail, tram, overhead trains, underground and other mass transit systems, as well as mining locomotives.

Product lines designed for railway environments include DC/DC converters, AC/DC power supplies and battery chargers, sine-wave inverters, phase and frequency converters, DC-input dimmable backlight inverters for LCD displays, DC-output UPS systems and complete power systems in 19in and 23in racks. The company also has proprietary technology for developing products with 30kVA isolation and very low corona limits.

Absopulse's power supplies are also extensively used in heavy-duty industrial and military applications in many countries.

Cost-effective railway power-conversion systems

Absopulse provides cost-effective solutions to almost any electrical configuration requirement, with output power ranging from a few watts to kilowatts.

Over the past 28 years, the company has developed numerous railway power supply designs that are constantly challenged in the field. Absopulse can often meet customer requirements by making a few modifications to existing designs. For other requirements, it provides semi or fully customized solutions with short delivery times and low set-up costs, even for complex specifications and low production quantities. An ongoing R&D program ensures that it remains innovative and competitive.

Absopulse power supplies are designed for an operational life of 20 to 30 years in the most severe environments. Its first major railway installation has been in operation for 25 years.

Railway DC/DC converters

Absopulse offers an extensive range of rugged, high-performance DC/DC converters. Any input/output and mechanical configuration is possible, with output power ranging from a few watts to several kilowatts. The company's railway DC-DC converters typically operate from nominal input voltages of 24VDC, 36VDC, 52VDC, 74VDC and 110VDC. The HVI Railway series has an input voltage of 750VDC (525-975 range), the traction voltage required for mass-transit vehicles and mining locomotives.

Railway AC/DC power supplies and battery chargers

Absopulse's rugged AC/DC power supplies are available with universal, 115VAC / 230VAC or custom inputs. Most designs have power factor correction. The company also offers an extensive selection of rugged battery chargers in output ranges from 100W to multi-kilowatts.

Single and three-phase railway DC/AC inverters and AC/AC frequency converters

Absopulse offers an extensive range of DC/AC inverters, AC/AC frequency converters and phase converters with output power levels from 100VA to 12kVA (50Hz, 60Hz or 400Hz). They are available in single or three-phase combinations.

Rail back-light inverters for LCD displays

The SWI series of rugged, compact, dimmable fluorescent backlight inverters offer dimming ratios of 2000:1 and wider. Operating temperature ranges including -55°C to +85°C are available. These inverters are suitable for railway, aircraft, ship-board and land-based military systems.

Gate-drive power supplies for traction systems

The company has developed proprietary technology to build DC-DC converters with 20kV isolation. Each unit is tested for corona (partial discharge) extinction at a minimum of 12kVrms and hi-pot tested for 20kVrms isolation. A new series with 30kV input isolation is also available.

Custom railway power supplies

Abspulse power supplies can be tailored to meet customer-specified mechanical requirements. Available package designs include full encapsulation in a thermally conductive MIL-grade silicon rubber compound or in enclosed, vented, conduction/convection-cooled chassis. Conformal coating and heavy ruggedizing can be added to non-encapsulated designs. Many of the company's converters can be provided in plug-in format for 19in or 23in rack-mount power systems.

Railway standard compliance

Absopulse's railway power supplies are designed to meet rail-specific standards including EN50155, EN50121-3-2 (EMI and EMC), EN55022 Class B EMI, RIA 12, IEC571, as well as IEC61373 shock/vibration and RIA 13 and RIA 20 mechanical standards. Please contact the company regarding any standards not listed here.

Railway projects

Absopulse's long-term customers include a few of the biggest names in the international railway industry. Please contact the company for a list of references.