The invention provides a low-voltage power supply system for a motor train unit. A preferential power supply bus BD is directly supplied by accumulators; a non-preferential power supply first path BN1 and a non-preferential power supply second path BN2 are supplied by a charger; emergency loads are arranged on the preferential power supply bus; a redundancy load 1 and a redundancy load 2 are respectively supplied by the non-preferential power supply first path and the non-preferential load second path, and other non-redundancy loads are equally distributed onto the two paths of the non-preferential loads according to the electricity capacity; meanwhile, an accumulator conversion switch is arranged; when a first-path non-preferential load bus has a fault, all loads on the path are de-energized, at the moment, trainmen on the motor train unit can convert the non-redundancy loads on the path to be supplied by the power supply of the preferential power supply bus through the accumulator conversion switch; and as long as one of non-preferential power supply paths is normal, the redundancy loads can work normally, thereby ensuring no loss of all load functions and normal work of all systems. By virtue of the redundancy of the low-voltage power supply line of the motor train unit, the breakdown of the motor train unit caused by the fault of the low-voltage power supply line can be prevented, and the reliability and punctuality of the motor train unit in operation are improved.
Low-voltage power supply system for motor train unit
2015-11-25
Patent
Electronic Resource
English
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