An Optimization Method for End Effect Suppression of Arc Permanent Magnet Torque Motor

Traditional rotary motors may encounter some problems when applied to large-diameter equipment due to the drawbacks of traditional transmission. The arc permanent magnet torque motor (APMTM) using stator splicing technology can improve the accuracy, efficiency and reliability of the equipment when applied to direct drive systems. It can be significant for overcoming the shortcomings of traditional rotating motors and promoting production. APMTM has the problem of large torque ripple caused by end effect. A method is proposed to suppress end effect from the perspective of adjusting the stator center angle and the stator adjacent angles, which can be used to suppress the torque ripple of APMTM. The mathematical derivation method and finite element method are used to analyze and calculate the end force of the motor. The proposed method of APMTM end effect suppression suitable for any number of unit motors is obtained. It can significantly suppress torque ripple caused by end effect in APMTM. This method provides experience for the structure design of the APMTM for the suppression of torque ripple.