Title :
Nonlinear Compensation in Digital Controller of Switching DC-DC Converters
Author :
He, Mingzhi ; Xu, Jianping ; Zhou, Zhongwen ; Chen, Ni ; Zhou, Guohua
Author_Institution :
Southwest Jiaotong Univ. Chengdu, Chengdu
Abstract :
Digital control of switching dc-dc converters brings many benefits including capability to implement advanced control algorithm that is often complex. Nonlinear compensation function with digital PID of power coefficients is proposed in this paper. The describing function is adopted for analysis. The transient response under different load variations is investigated by simulation and compared with the converters employing linear PID compensation. The experiment system is also set up on PGA platform to verify the analysis and simulation results. By comparison, nonlinear compensated converter has much better transient performance than the linear compensated one.
Keywords :
DC-DC power convertors; digital control; field programmable gate arrays; nonlinear control systems; three-term control; DC-DC converter; FPGA platform; advanced control algorithm; digital PID controller; nonlinear compensation; Algorithm design and analysis; DC-DC power converters; Digital control; Hysteresis; Nonlinear control systems; Radio control; Switching converters; Three-term control; Transient response; Voltage control;
Conference_Titel :
Communications, Circuits and Systems, 2007. ICCCAS 2007. International Conference on
Conference_Location :
Kokura
Print_ISBN :
978-1-4244-1473-4
DOI :
10.1109/ICCCAS.2007.4348278
