正负脉冲充电器(充电器软硬件经过调整,波形达到满意效果)

经历了前后两个多月的时间,终于做好了.
充电器是由一个AVR单片机控制的.具有自动识别电池电压.反接保护,空载不开机,短路保护等等.
充电器使用的充电波形是正负脉冲充电,放电电流利用RC微分电路.确保有足够的放电尖峰.
输出电流可调:12V,1A-10A;24V,1A-6A
开关电源用的电源IC为SG6841,自身带短路保护,过温保护等等.功率管使用TOP-3的IRF的管子.后面脉冲控制MOS管是IRF4905,P沟道的.
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充电波形示意图:
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经过一些列的调整后,波形非常理想
充电方式为脉冲,恒流限压.
充电器的充电波形示意图以及相关参数如图(实测波形在下面):
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在6A充电时电流波形(波形很好的那个是在电位器指向6A时候,串入10欧姆电阻的充电波形,只是为了分析充电器过程):
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在6A充电时,电瓶两端波形(其中每个波形中的尖峰是开关电源的开关纹波,60K左右):
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电路图:(更正了一个连线错误,78L05稳压块那里)
1976201248743002.rar