Claw-pole Magnetic Levitation Torque Motor Utilizing Cogging Torque
Aiming at the problem that the existing moving iron torque motor for 2D valve is difficult to adjust the neutral position,this paper designs a claw-pole magnetic levitation torque motor that uses the cogging torque between the stator and the rotor to adjust the neutral position.Firstly,the electromagnetic torque and cogging torque of rectangular claw pole and trapezoidal claw pole are analyzed and compared by establishing a simulation model of electromagnetic characteristics,and the topology structure of claw pole magnetic suspension torque motor is determined.Then based on the equivalent magnetic circuit method,the qualitative formula of the electromagnetic torque of the torque motor is deduced,and an orthogonal test is designed to determine the sensitivity of the design parameters to the electromagnetic torque.Based on the structural parameters optimized by simulation,an experimental prototype was machined,and an experimental test rig was built to test the torque-angle characteristics of the electromagnetic torque and the cogging torque of the torque motor.The test results show that the electromagnetic torque of the torque motor decreases with the rotation angle,has a positive magnetic stiffness,and can effectively use the cogging torque for neutral adjustment.
万方数据
维普
