Parameter Optimization of Magnetic Field Modulation Magnetic Gear Based on Servo Motor Reducer

In response to the many drawbacks of traditional servo motors combined with mechanical reducers, this article considers using magnetic gears to replace the original mechanical reducers to achieve low speed and high torque. This article first introduces the basic structure of magnetic field modulated magnetic gears and conducts qualitative and quantitative analysis of their principles. Secondly, the three parameters of the magnetic regulating ring, the transmission ratio and the number of magnetic poles are optimized. The pole arc coefficient of the magnetic regulating ring is first solved as an independent variable; The transmission ratio is influenced by the number of magnetic pole pairs of the inner and outer rotors. The optimal transmission ratio is first calculated, and then the optimal number of magnetic pole pairs is obtained. Finally, through the analysis and calculation of the finite element method, it was found that the optimal pole arc coefficient and thickness of the magnetic adjusting ring are 1.2 and 2 mm, respectively, the optimal transmission ratio is 6, the optimal number of internal magnetic poles is 3, the maximum output torque is 24.5039N. m, and the maximum input torque is 4.3112N. m. This article selects a servo motor with an 80 base, with a rated output torque of 2N. m, which meets the design requirements.