Development of a torque motor with enhanced performance employing novel semi-inset PM pole

The key task of torque motors is to enhance the output torque. From an electromagnetic design perspective, the motor is required to have the largest possible air gap flux density and operating current. This can be achieved through several approaches: First, by using high-performance permanent magnets to increase the rotor magnetic flux. Second, by employing high-permeability soft magnetic materials to reduce magnetic reluctance. Third, through more rational structural design. Fourth, by designing efficient heat dissipation structures. Based on these approaches, a torque motor with enhanced performance employing novel semi-inset PM pole is proposed, the structure of the motor is introduced, the influence of the new semi-inset permanent magnet poles on the electromagnetic performance is analysed, the structural strength and temperature rise are checked, and finally a prototype is manufactured and its performance is verified. The design results have achieved the expected effect and meet the given operating conditions.