Permanent magnet direct drive electric drum Original external rotor permanent magnet technology, Jiaxuan permanent magnet direct drive drum shaft is fixed, which is equivalent to the stator part of the motor. The stator core is superimposed and fixed on the shaft by silicon steel sheets, and the stator winding is embedded in it. When the stator winding passes through the three-phase symmetry Alternating current can generate a rotating magnetic field; the drum surface is equivalent to the rotor part of the motor. The rotor is superimposed and fixed on the inner surface of the drum by silicon steel sheets, embedded with UH grade neodymium iron boron permanent magnets, which will generate a permanent static magnetic field. After symmetrical three-phase alternating current, the motor works, that is, the drum works.