The invention discloses an air and water
hybrid cooling high-speed permanent-
magnet motor and belongs to the technical field of motors. The large-power high-speed permanent-
magnet motor comprises a casing, a cooling
water jacket, a
stator core, a
stator radial air duct, a
stator inner air duct, a motor rotor, an outer rotor axial fan, an outer rotor fan fixing frame and two sliding bearings. The stator core is divided into two sections, the radial air duct is reserved in the middle, and the inner air duct is reserved in a stator slot close to the air gap position. The cooling
water jacket is arranged outside the stator casing, a spiral water way is arranged in the
water jacket, and water flows into the water way from the middle of the water way and flows out from a left spiral water outlet and a right spiral water outlet which are arranged at two ends of the water way. The air and water
hybrid cooling high-speed permanent-
magnet motor can mechanically solve the problem that a permanent magnet is broken when bearing large pulling stress during high-speed rotating, further solves the problems that the large-power high-speed motor is large in loss density, difficult in heat dissipation and over high in temperature rising, and prevents the permanent magnet from having irreversible demagnetization easily at high temperature.