东腾小武 发表于 2012-12-19 23:49:58

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

lghtjpu 发表于 2012-12-20 08:58:58

汽车的电源本来就是不稳定的,特别是发动瞬间电压很高

dianzimingong 发表于 2012-12-20 09:06:32

家用的小车 发动机着着的时候 输出大约14.5V

fsclub 发表于 2012-12-20 09:11:48

无定数,可能很高,也可能很低。

topdog 发表于 2012-12-20 09:36:50

senzh01 发表于 2012-12-20 09:42:00

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。

xiangxiadage 发表于 2012-12-20 12:39:30

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/

usk5yenj4id04dm 发表于 2012-12-20 19:06:13

起动时有非常大的电流波动,有能量很大的浪涌.
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