Optimal Design Of Reluctance Resolver

Vector control in high-performance brushless motor systems requires high-precision,highresolution rotor absolute position signals.Currently widely used rotor position sensors mainly include resolvers,photoelectric encoders,and Hall devices.Among them,rotary transformers are widely used in various fields such as electric vehicles,aerospace,and industrial manufacturing because of their high precision,high temperature resistance,waterproof and dustproof,and strong anti-interference.This paper takes the rotor salient pole radial reluctance resolver as the research object,and designs and optimizes the body structure with the goal of high precision.Firstly,the relevant stator and rotor structural parameters that affect the accuracy of the radial reluctance resolver are initially determined,and the preliminary model of the salient-pole radial reluctance resolver of the rotor is completed.In order to guide the optimization design of the body structure in the following article,in-depth analysis of the causes of errors of the reluctance resolver.Secondly,it analyzes the limitation of harmonic distortion rate,which is the commonly used resolver performance judgment index,and determines the use of electrical error as an important tool for resolver performance judgment.Based on the preliminarily designed reluctance resolver model,the important parameters in the stator and rotor are parameterized and analyzed,and the influence of the change of each parameter on the accuracy and output voltage is studied.Through finite element calculation and comparison analysis of the electrical error rate of change of equal-turn windings,non-overlapping windings and sinusoidal windings under dynamic and static eccentricity,determine the advantages of the equal-turn winding structure in terms of anti-eccentricity.Then,based on the parameter analysis results of the controlled variable method,the optimal range of each stator and rotor parameter value is determined,and Taguchi optimization method is used to perform multi-parameter and multi-objective comprehensive optimization,and the effectiveness of the optimization results is analyzed and verified.On the basis of the structure obtained by Taguchi optimization method,in view of the important influence of the third harmonic content in the air gap reluctance on the accuracy of the reluctance resolver,the third component is injected into the salient pole structure of the rotor and further optimized,and the rotor injection is analyzed.Accuracy performance of tertiary reluctance resolver under eccentric structure.Finally,a test platform for the radial reluctance resolver was built,and the completed prototype was tested and analyzed to verify the reliability of the finite element simulation.At the same time,additional simulation research is carried out on the technological problems of winding and embedding,and the influence of technological problems such as the wrong number of winding turns and asymmetrical distribution of windings on the accuracy of reluctance resolvers.