Study of Electromagnetic Torque of Limited Angle Torque Motor and Hall Magnetic Field
The permanent magnet cogging type central winding limited angle torque motor generally has a small air gap,which can increase the amplitude of air gap and improve the torque output capacity.Accord-ing to this advantage,through theoretical design and finite element simulation software,a kind of rotary di-rect drive valve limited angle torque motor that meets the basically performance requirements was designed.In order to restrain torque fluctuation and improve torque waveform,this paper analyzes the cogging torque and output torque which may be affected by the magnetizing direction and the chute.According to the advan-tages of linear Hall,such as its small size and good feedback signal linearity,linear Hall was selected to re-ceive signals.And the influence of Hall position and eccentricity on the distortion rate of Hall waveform was researched.The results show that the harmonic distortion rate was successfully reduced from the initial 4.9%to below 0.1%after optimizing the Hall waveform,which has important reference significance in the field of engineering research.
万方数据
维普
