作者：shenyousan989

用了很多年的百得蜗牛吸尘器终于坏了，舍不得扔掉换个大功率无刷电机看看效果吧。

比较了一下原来扇叶仓的大小，我选择了莱克的18v250W的一款无刷风机，信号板两档变速。其实我一开始相中的是莱克24v 380w的风机，无缘这款风机直径64mm，滤芯不能用内径不够。但是这款250w的风机也不错了，是原装18v 120w电机的两倍了，并且不用改电，原装电池就能用（我这个吸尘器是海外20v版本的）。

因为这种一体风机的风扇一端是吸气口，中部和电路板一端是出风口，他和百得原装的正好相反。所以安装时就得反着来。

先来说说风机驱动板电容太长不适合原来的扇叶仓深度的改造。

风机太长，原来的扇叶舱深度不够，所以我把这两颗电容用导线延长外接了。并且把电源线、信号线接头端子都拆下来，重新焊接在电路板另一面了。（注意:1.电源线、塑料端子、电容的正负极不要接反。2.拆电路板时记得留好位置记号，磁极不要错。3.驱动板不能直接外接，因为板子上的六颗mos管需要风冷强制降温。）

再来说说如何固定风机

电路板mos管会发热所以电路板不能紧贴吸尘器的后盖儿，找两张信用卡剪成比风机大的圆垫在后盖上，利用这两张信用卡的厚度把风机垫高（信用卡不是永就留在这了，只是临时为了垫高风机使得电路板和吸尘器后盖儿之间留有距离，驱动电路板好散热）用铸工胶把风机固定在原来的扇叶舱盖上。

这次就先到这里吧，过几天微动开关到货了，继续改造信号源电路板。

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