Whole sealed alternating-current motor

The invention relates to an automobile motor, particularly relates to a traction motor for an electric automobile, and discloses a whole sealed alternating-current motor to solve the problem that a prior traction motor cannot well meet utilization requirements of an electric automobile. The whole sealed alternating-current motor comprises a whole sealed casing composed of an end cover and a motor base, wherein the end cover is provided with a bearing cap. The end cover and the motor base are made of cast aluminum, and a spiral cooling water pipe is further cast in the cast aluminum motor base. According to the whole sealed alternating-current motor, the motor base and the end cover are made of cast aluminum, and the motor weight is reduced greatly through the cast aluminum rather than steel plates; the spiral cooling water pipe is further cast in the cast aluminum motor base, so that the motor cooling capacity is enhanced; and as the casing material is optimized and the motor cooling capacity is improved, the motor has the advantages of small size, low weight, large output power and torque, high overload capacity, excellent cooling property and small rotary inertia, and utilization requirements of electric automobiles are met.