Abstract: Domestic scraper conveyor has big rotary inertie and starting torque, which makes starting of its driving moter difficult, so the ordinary asynchronous motors can't fulfill the task. In view of the problem, explosion-proof permanent magnet synchronous motor with variable-frequency drive integration was developed. The motor uses optimized electromagnetic scheme to control electromagnetic load in a reasonable range, and meet requirements of weak magnetic speed control. Characteristics of variable frequency power supply, explosion-proof performance requirements and volume and weight restrictions are fully considered during structural design, the structure is compact and in line with relevant explosion-proof requirements. Cooling capacity and margin are fully considered in cooling program design to ensure that the motor has a reasonable temperature rise limit. The results of finite element analysis show that deflection and strength of spindle, and strength of core bridge are within a reasonable range. The prototype test results show that the motor has good constant torque characteristics and speed regulation performance.