Resolver Electrical Accuracy Calculation Method and Accuracy Influence Analysis

Due to the nonlinearity of the core material of the resolver at the initial stage of magnetization characteristics, the air gap magnetic field contains odd harmonics, which will produce functional errors, which will affect the angle measurement accuracy of the resolver. Therefore, this paper takes a wound dualchannel resolver as an example to explore the influence of different materials on its accuracy. Firstly, a reasonable design scheme is determined by establishing a physical calculation model of a resolver. Then, the arctangent method is used to calculate the electrical error of the resolver. On this basis, the influence of different core materials on the accuracy of resolver was explored. The results show that the distortion rate is low when DW310_35 is used as an iron core material, and the electrical error is small.