Under the same weight and size, the power of brush motor is about 20 ~ 30 times greater than that of brushless motor. An electric tool that you can carry with you and uses a brushless motor is about 60 watts at most, so you can only be a fan, let alone an electric tool.
Of course, if the spindle motor driven by frequency converter is used, the power will be a little higher, about 500 watts at most, because of its high speed (65438+ 100000 rpm). Moreover, it is impossible to install large-size tools or abrasives at high speed, and it can only be used for engraving pens or grinding teeth, but the rotating part is relatively heavy, and it is difficult to swing by hand at high speed.