汽车点烟器在汽车启动时输出电压范围
前几天我有一个野营灯在用汽车车充充电时烧掉了,工作灯输入是12V的点烟器输出也是12V正常来将是不会烧掉的 我怀疑是在汽车发动的时候输出电压不稳烧掉了 汽车的电源本来就是不稳定的,特别是发动瞬间电压很高 家用的小车 发动机着着的时候 输出大约14.5V 无定数,可能很高,也可能很低。 定数应该是有的,发电机调节器决定了最高值,启动时根据起动机及电瓶性能,低电压差别较大。 据说:Equipment intended to be powered by the receptacle needs to account for intermittent contact, and voltages outside the nominal 12 V DC like top voltage 9-16 V continuously, top voltage at 20 V during 1 hour, 24 V during 1 minute, 40 V during 400 ms.
Protection component tolerance example ratings are +50 to -60 V DC Additionally, issues can occur with temperatures varying between -40 till +85 °C such as humidity and condensation.
这里有波形
http://blog.prosig.com/2011/03/28/in-vehicle-voltage-supply-from-cigar-lighter-accessory-sockets/ 起动时有非常大的电流波动,有能量很大的浪涌.
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