High-accuracy resolver-to-digital conversion via phase locked loop based on PID controller

2017 2nd International Conference on Mechatronics and Electrical Systems

机械制造;无线电电子学

Li, Yaoling^1 ; Wu, Zhong^1

School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing

100191, China^1

关键词: Angle tracking;    Conversion accuracies;    High-accuracy;    Higher frequencies;    Phase detection errors;    Phase Locked Loop (PLL);    PID controllers;    Resolver-to-digital conversion;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/339/1/012003/pdf
DOI  :  10.1088/1757-899X/339/1/012003

来源: IOP

【 摘 要 】

The problem of resolver-to-digital conversion (RDC) is transformed into the problem of angle tracking control, and a phase locked loop (PLL) method based on PID controller is proposed in this paper. This controller comprises a typical PI controller plus an incomplete differential which can avoid the amplification of higher-frequency noise components by filtering the phase detection error with a low-pass filter. Compared with conventional ones, the proposed PLL method makes the converter a system of type III and thus the conversion accuracy can be improved. Experimental results demonstrate the effectiveness of the proposed method.