The invention discloses a current detection circuit in a bidirectional conversion process of urban subway rail transit, which relates to the field of current detection and comprises a direct-current sampling control module, a direct-current sampling control module, a direct-current sampling control module, a direct-current sampling control module, a direct-current sampling control module, a direct-current sampling control module and a direct-current sampling control module, if the DC voltage value is greater than the upper threshold or less than the lower threshold, the AC sampling module is driven to work; the alternating current sampling module is used for detecting alternating current of a power grid and providing working signals for the zero crossing point closing module and the zero crossing point disconnecting module when the alternating current crosses a zero point; compared with the prior art, the beneficial effects are that through cooperation of the DC sampling control module, the AC sampling module, the zero crossing point closing module and the zero crossing point disconnection module, the moment of connection or disconnection of the AC-DC conversion device is controlled to be the moment of AC zero crossing of the commercial power; the current at the moment of connection or disconnection of the AC-DC conversion device is small, and the service life of the bidirectional converter device is prolonged.
本发明公开了一种城市地铁轨道交通双向变流过程中电流检测电路,涉及电流检测领域,该城市地铁轨道交通双向变流过程中电流检测电路包括:直流采样控制模块,用于检测列车的直流电压值,若直流电压值大于上限阈值或小于下限阈值时,驱动交流电采样模块工作;交流电采样模块,用于检测电网交流电,在交流电过零点时,为过零点闭合模块、过零点断开模块提供工作信号;与现有技术相比,本发明的有益效果是:本发明通过直流采样控制模块、交流电采样模块、过零点闭合模块及过零点断开模块的配合,控制交直流转换装置导通或断开的瞬间为市电交流电过零点时,使得交直流转换装置导通或断开瞬间电流较小,增加双向变流装置的使用寿命。
Current detection circuit in bidirectional conversion process of urban subway rail transit
一种城市地铁轨道交通双向变流过程中电流检测电路
2025-04-15
Patent
Electronic Resource
Chinese
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