An Autotuning Digital Controller for DC-DC Power Converters Based on Online Frequency-Response Measurement

被引:131
作者
Shirazi, Mariko [1 ]
Zane, Regan [1 ]
Maksimovic, Dragan [1 ]
机构
[1] Univ Colorado, Colorado Power Elect Ctr, Boulder, CO 80309 USA
关键词
DC-DC power conversion; digital control; frequency response; identification; pulsewidth-modulated (PWM) power converters; switched-mode power supplies (SMPS); tuning; SYSTEM;
D O I
10.1109/TPEL.2009.2029691
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper describes a hardware-description-language-coded autotuning algorithm for digital PID-controlled dc-dc power converters based on online frequency-response measurement. The algorithm determines the PID controller parameters required to maximize the closed-loop bandwidth of the feedback control system while maintaining user-specified stability margins and integral-based no-limit-cycling criteria, as well as ensuring single-crossover-frequency operation and sufficiently high loop gain magnitude at low frequencies. Experimental results are provided for five different pulsewidth-modulated dc-dc converters, including a well-damped synchronous buck, a lightly damped synchronous buck with and without a poorly damped input filter, a boost operating in continuous-conduction mode, and a boost operating in discontinuous-conduction mode.
引用
收藏
页码:2578 / 2588
页数:11
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