A motor, comprising casing, rotating shaft, magnetic ring, three-phase hollow cup coil winding and insulating end cover, is provided. The casing comprises sleeve and inner core arranged coaxially with sleeve and air guide plates connected to sleeve and inner core, the sleeve, inner core and two adjacent air guide plates are surrounded to form air guide channel, inner core is provided with mounting hole, bearing is installed in mounting hole, and rotating shaft passes through bearing, magnetic ring is sleeved outside one end of rotating shaft, three-phase hollow cup coil winding is sleeved outside the magnetic ring. Rotating gap is set between three-phase hollow cup coil winding and magnetic ring, and insulating end cover is installed on the outlet of sleeve. Wind end fixes the three-phase hollow cup coil winding in sleeve, inner core is provided with heat dissipation holes that are all connected with mounting holes.