安徽快3DIANGANDUANKAISHUNJIANCHANSHENGDEFANXIANGDIANDONGSHIKEYIYONGYUSHEJIDIANGANSHISHENGYADIANLU

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FANXIANGDIANDONGSHIDEWEIHAI

我们用三极管驱动继电器时,三极管截止瞬间,继电器的线圈会产生感应电流阻碍电流的消失,这种感应电流产生的反向电动会对三极管造成一定的冲击,可能导致三极管击穿。

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安徽快3FANXIANGDIANDONGSHIZAIDIANGANSHISHENGYADIANLUZHONGDEZUOYONG

安徽快3ZAIDIANGANSHISHENGYADIANLUZHONG,TONGGUOPWMKONGZHIQIKUAISUDEKAIGUANMOSGUANLAISHIXIANDIANYADESHENGGAO。

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当电流急剧增加后,断开开关SW1,电感就会把储存的磁场就会转回电场,其实就是反向的电动势了。感应产生的大电流通过肖特基二极管D1流到后端的电路,后端电路的电容就会储存前面过来的大电流,经过多次的快速开关后,就可以实现电压升高了。

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