Variable frequency speed control synchronous motor is a motor developed by our company through summarizing the experience of variable frequency motor technology at home and abroad, especially used in metallurgical rolling industry, providing users with advanced technology, reliable and stable operation of the motor products. The series motor has wide speed range, strong overload capacity, can withstand high torque overload and axial thrust, and the electrical parameters match the frequency converter, speed regulation accurate and fast response, and provide guarantee for rolling steel quality.