Structure design method of torque motor with low torque fluctuation

Abstract

The invention provides a structure design method of a torque motor with low torque fluctuation, which comprises the following steps: determining the number of auxiliary grooves, the groove type and the grooving angle, wherein the number Nn of auxiliary grooves in a single crown part is the smallest integer value satisfying the condition that Nn+1 is not equal to Np/k, the auxiliary grooves are semicircular grooves, and the grooving angle is obtained from the set range by using the simulation calculation method when the torque fluctuation is minimum. The structure designed by the invention reduces the cogging torque of the motor and is very effective in reducing the torque fluctuation of the motor. Moreover, the scheme is simple in structure, good in manufacturability and easy to implement.

Description

Technical field [0001] The invention relates to the technical field of motors, in particular to a structural design method of a torque motor with low torque ripple. Background technique [0002] With the development of permanent magnet motors, permanent magnet motors are widely used in various fields and are developing in the direction of high precision, light weight, high reliability and low pulsation. Due to its high reliability, high stability and high precision, torque motors are widely used in many fields such as machinery manufacturing, automatic control, aerospace and national defense. In some special applications, the torque motor is required to run smoothly, that is, the smaller the motor torque fluctuation, the better. [0003] For torque motors, torque ripple is an important performance parameter index. Because the speed of the torque motor is low, when the torque ripple is large, it will cause the motor to shake, the current is too large, the performance is reduced, an...

AI Technical Summary

Problems solved by technology

[0003] For torque motors, torque fluctuation is an important performance parameter index. Since the speed of torque motors is low, when the torque fluctuation is large, it will cause motor vibration, high current, performance degradation, and affect control accuracy. In severe cases, even control failure

The main reasons for torque fluctuation are as follows: 1. Harmonic torque caused by winding distribution not satisfying the sine law, etc., 2. Inappropriate selection of magnetic circuit saturation coefficient leads to excessive torque fluctuation, 3. Cogging Torque fluctuations caused by the torque itself, 4. Insufficient machining accuracy of motor components such as rotors and stators, 5. Control strategies for torque fluctuations that are not reasonable enough

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