Railway vehicle-oriented parallelizable double-voltage power supply module with multi-protection

Abstract

The invention relates to a railway vehicle-oriented parallelizable double-voltage power supply module with multi-protection. The power supply module comprises two paths of power supply units, wherein each path of power supply unit comprises an EMC protection and conditioning circuit, an under voltage protection circuit, a temperature protection circuit, a parallelizable double-voltage conversion circuit, a parallel output isolation circuit and a filtering and voltage stabilizing circuit; the parallelizable double-voltage conversion circuit of each path of power supply unit is provided with two groups of voltage conversion chips; the two groups of voltage conversion chips share a front-end protection circuit; both the two groups of voltage conversion chips are provided with mode switch pins; when the mode switch pins of the voltage conversion chips corresponding to the two paths of power supply units are switched off, the two paths of power supply units are output in parallel in a hot standby manner; and when the mode switch pins of the voltage conversion chips corresponding to the two paths of power supply units are switched on, the two paths of power supply units are output in parallel in a current sharing manner. The power supply module provided by the invention is convenient and suitable for different occasions, and has the effects of reducing the cost and shortening the development period.

Description

technical field [0001] The invention relates to a power supply module, in particular to a parallel dual-voltage power supply module with multiple protections applied to rail vehicles. Background technique [0002] At present, most power modules of rail vehicles adopt single power module or single power redundant power supply mode, and provide basic protection measures for power modules. The disadvantages of the above two power supply modules are as follows: 1) Once a single power supply module has a power failure, it will cause the loss of part or even all power supply functions, increasing the driving risk of rail vehicles. 2) The single power supply redundant power supply method usually uses diodes for isolation. The disadvantages are large power consumption, large voltage loss, and large heat dissipation area. When the load requires multiple voltages, a new power supply needs to be added, which increases power supply costs and takes up space. [0003] For example, Chines...

AI Technical Summary

Problems solved by technology

The disadvantages of the above two power supply modules are: 1) Once a single power supply module has a power failure, it will cause the loss of part or even all power supply functions, increasing the driving risk of rail vehicles

2) The redundant power supply method of single power supply usually uses diodes for isolation. The disadvantages are large power consumption, large voltage loss and large heat dissipation area. When the load requires multiple voltages, a new power supply needs to be added, which increases power supply costs and takes up space.

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