TY - GEN
T1 - An Improved-Precision Voice Coil Motor Drive Method Utilizing Additional Current Feedback
AU - Guo, Feng
AU - Liu, Jiaxi
AU - Pei, Le
AU - Li, Liyi
AU - Peng, Fenghua
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/8
Y1 - 2019/8
N2 - A new method using an additional current feedback loop with programmable gain amplifier (PGA) to improve accuracy and suppress output current drift is proposed for the analog drive architecture applied to high-precision small-current type voice coil motor (VCM). First of all, a gain switching method based on heuristic algorithm in the additional current feedback loop is proposed to cut down on the switch times and improve dynamic performance; Secondly, a tracking differentiator is utilized to suppress noise and flashes in current sample process, improving the robustness in the additional feedback ring. Finally, a VCM driver is built, and the performance is tested. In the range of -1mA~+1mA, an absolute accuracy of 5μA is achieved; in the range of 0~+35mA, the linearity is higher than 0.02%, which proves the effectiveness of the proposed method.
AB - A new method using an additional current feedback loop with programmable gain amplifier (PGA) to improve accuracy and suppress output current drift is proposed for the analog drive architecture applied to high-precision small-current type voice coil motor (VCM). First of all, a gain switching method based on heuristic algorithm in the additional current feedback loop is proposed to cut down on the switch times and improve dynamic performance; Secondly, a tracking differentiator is utilized to suppress noise and flashes in current sample process, improving the robustness in the additional feedback ring. Finally, a VCM driver is built, and the performance is tested. In the range of -1mA~+1mA, an absolute accuracy of 5μA is achieved; in the range of 0~+35mA, the linearity is higher than 0.02%, which proves the effectiveness of the proposed method.
KW - High-precision
KW - current feedback
KW - heuristic algorithm
KW - tracking differentiator
UR - https://www.scopus.com/pages/publications/85077132059
U2 - 10.1109/ICEMS.2019.8921480
DO - 10.1109/ICEMS.2019.8921480
M3 - 会议稿件
AN - SCOPUS:85077132059
T3 - 2019 22nd International Conference on Electrical Machines and Systems, ICEMS 2019
BT - 2019 22nd International Conference on Electrical Machines and Systems, ICEMS 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 22nd International Conference on Electrical Machines and Systems, ICEMS 2019
Y2 - 11 August 2019 through 14 August 2019
ER -