请教48V充电器改12V（3842+AS358），变压器一共5个绕组，初级主绕是17T+17T，次级主绕改成5T，其他付绕不 48V 20A的电动车充电器，变压器初级电压有330V，没有...
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输出有个大的水泥或者碳膜电阻，把它调整小些试试
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