Design of angle error correction system for resolver
HE Ming1,2, GANG Yu1,2, CHEN Hao1,2, WU Dingxiang2,3, TANG Lijun1,2
(1.School of Physics and Electronic Sciences, Changsha University of Science & Technology, Changsha 410114, China; 2.Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the NearEarth Eletromagnetic Environments, Changsha 410114, China; 3.Billion Set Electronic Technology Co.Ltd., Changsha 410114, China)
 

Abstract: Aiming at the angle error problem of the data output by resolver, the correction method of resolver was studied, and a correction system based on FPGA was proposed and designed. The system based on the encoder was combined with FPGA and ARM. A photoelectric encoder and a resolver were driven by the same motor, and the angle between photoelectric encoder and resolver was measured by a control model which was consisted of ARM and FPGA. Data and measured nonlinear errors of the encoder and resolver were analyzed and compared. The error analysis table was established, and the compensation of errors based on coefficient was applied. The experimental results indicate that the system can correct the output data of the resolver. Before correction, the largest angle error of resolver is 21.2 arc min, which reduces to 5.3 arc min after correction. The correction method is effective and the correction speed is fast.
Key words: resolver; correction system; errors analysis