Improvement of output dynamic performance of an Average Current Mode Controlled buck converter with a parallel controller

Abstract

This paper presents a parallel voltage controller to improve the output dynamic performance of a buck converter with Average Current Mode Control (ACMC). The parallel controller is a high-order controller synthesized from parallel connection of the two basic controllers. It is proposed to compensate the control-tooutput transfer function of the converter, which has multiple poles and zeros. Up until now, the task is commonly performed by the two-pole one-zero controller, which is clearly not adequate and has somewhat limited the dynamic performance of the converter. In the paper, the design of parallel controller is illustrated with a 5V/2V ACMC buck converter. Experimental and simulated results that show the improvement of output voltage response to a step load change are presented. Index Terms-Average Current Mode Control (ACMC), DC-DC converters, Control Design, Modeling.

A novel Generalized State-Space Averaging (GSSA) model for advanced aircraft electric power systems

“…Dynamic model expression of the multi-converter system in AAEPS Buck converters have been traditionally used in a variety of applications such as spacecraft and aircraft electric power systems, more electric ship power systems (MESPS), more electric vehicles (MEVs), electric and hybrid electric cars, and medical electronics. The use of dc-dc converters is very common in the multi-converter power electronic system in an APU-based advanced aircraft [12,16,19,20]. As illustrated in Fig.…”