AC DC Converter – LR Series
Relec Electronics in association with leading global manufacturer of power conversion devices, Bel Power, announces the introduction of the new LR series 300 Watt AC DC power supplies.
The LR series follows on as an AC input version of the highly successful, ultra-wide input HR / HRP series of DC DC converters. Bel Power / Melcher have developed these converters and optimised them for use in transportation and other advanced electronic systems.
As with all Melcher branded products, the LR comes in an extremely rugged euro-cassette format with a range of accessories for either rack or chassis mounting. The case design allows for operation at nominal loads up to 71°C with natural cooling. If forced cooling is provided, the ambient temperature may exceed 71 °C, but the case temperature must remain below 95 °C. The LR series has been designed in accordance with the requirements and EN50155, EN50121-4 and is also available with a fully compliant sub-rack meeting the American Railway Engineering and Maintenance-of-Way Association (AREMA) standards.
LBC Series High Performance Battery Chargers
Historically train borne battery chargers have been integrated within the large auxiliary converter which also provides power to HVAC systems, compressors etc. This has traditionally meant that large and heavy equipment (traction converter, auxiliary converter and battery) are all in one location on the train leading to increased axle loads which leads to higher levels of abrasion of the track and train wheels. The LBC series allows the battery and charger to be separated, with weight being more evenly distributed across all the carriages of the train.
The high-power density of the LBC series gives greater flexibility to system builders, allowing them to distribute weight more efficiently around the train. The LBC series can supply up to 12kW of output power at 110V dc with a class leading power density of 213W/cm3. The heart of the system is a digital system protocol (DSP) for control and monitoring of all system parameters making it the ideal building block for charging traction batteries. An
Internal RS485 / CAN bus is used for command, monitoring and diagnostic information that is supplied to the shelf controller and to the external supervising system. External communication is provided by either CAN or Ethernet communication.