The inverter speed regulation technology can realize speed regulation. However, the inverter has complex structure and is susceptible to electromagnetic interference, which influences the reliability of equipment running. In addition, when the grid voltage fluctuates, the inverter is hard to ensure the normal operation of the whole system. Therefore, its application in harsh environment such as power plant is limited. For this problem, a new winding type permanent magnet coupling speed regulating motor is proposed. The clutch of the motor adopts a non-mechanical contact structure to reduce the mechanical loss. Then, the rotor is directly adjusted by cascade speed regulation, which has the advantages of quick response and high reliability. The structure has the capability of resisting low voltage ride-through of power grid. Finite element model of the winding type permanent magnet coupling speed regulating motor is established and finite element analysis is carried out. The results show that the motor has good speed regulation ability and steady torque. It has a broad application prospect in industry.