Permanent magnetism alternating current interpolation shaft servo motor

The invention discloses a permanent magnet alternating current interpolation shaft servo motor, belonging to the field of servo motors. The permanent magnet alternating current interpolation shaft servo motor comprises a servo motor body, wherein the upper and lower ends of the servo motor body are each provided with an auxiliary heat dissipation shell, and a humidity tester is fixedly connected to the inside of the auxiliary heat dissipation shell; the left and right ends of the auxiliary heat dissipation shell at the upper end are each fixedly connected with a main fixing plate; through holes are drilled in the outer end of the each main fixing plate; and the left and right ends of the auxiliary heat dissipation shell at the lower end are each fixedly connected to an auxiliary fixing plate, and the outer end of the auxiliary fixing plate is in threaded connection with fastening bolts. The permanent magnet alternating current interpolation shaft servo motor can decrease the temperature of the motor significa