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关于稳压电源的启动原理

Source: Time:2019-12-31 17:38:18 views:

其二,热插拔时,由于稳压电源系统大容量储能电容的充电效应,稳压电源系统中会出现很大的冲击电流,大家都知道,电容在充电时,电流呈指数趋势下降(左下图),所以在刚开始充电的时候,其冲击电流是非常大的. 稳压电源缓启动原理剖析此冲击电流可能会烧毁设备稳压电源保险管,所以在热插拔时必须对冲击电流进行控制,使其按理想的趋势变化,如右上图所示,图中0~t1为稳压电源缓启动时间.
其一,热插拔时,连接器的机械触点在接触瞬间会出现弹跳,引起稳压电源振荡,如下图所示:

    稳压电源缓启动原理剖析这个振荡过程会引起稳压电源系统稳压电源跌落,引起误码,或稳压电源系统重启,也可能会引起连接器打火,引发火灾.

    解决的办法就是延迟连接器的通电时间,在连接器抖动的那十几毫秒内((t1至t2)不给连接器通电,等插入稳定后(t2后)再通电,即防抖动延时.

    其二,热插拔时,由于稳压电源系统大容量储能电容的充电效应,稳压电源系统中会出现很大的冲击电流,大家都知道,电容在充电时,电流呈指数趋势下降(左下图),所以在刚开始充电的时候,其冲击电流是非常大的.

    稳压电源缓启动原理剖析此冲击电流可能会烧毁设备稳压电源保险管,所以在热插拔时必须对冲击电流进行控制,使其按理想的趋势变化,如右上图所示,图中0~t1为稳压电源缓启动时间.

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