Title: The research of digital-PID and sliding mode control strategy for DC/DC converter

Authors: Qi Zhou; Chu Zhou; Bing Yang; Shaocheng Qu

Addresses: Department of Electronics and Information Engineering, Central China Normal University, Wuhan City, Hubei Province, 430079, China ' Department of Electronics and Information Engineering, Central China Normal University, Wuhan City, Hubei Province, 430079, China ' Department of Electronics and Information Engineering, Central China Normal University, Wuhan City, Hubei Province, 430079, China ' Department of Electronics and Information Engineering, Central China Normal University, Wuhan City, Hubei Province, 430079, China

Abstract: Based on the fixed frequency PWM control strategy, this paper introduces a DSP-based digital PID control technology and a sliding mode variable structure control theory for high frequency DC/DC converter in detail. Firstly, a traditional analogy sliding mode controller with the reaching law and a digital PID controller are designed, respectively. Then, experimental prototypes for two kinds of control systems for DC/DC converters are constructed, and comparative experiment are implemented. The experiment results show that the DC/DC converter by using digital PID controller has a fast dynamic response and high accuracy in the presence of the input voltage fluctuation and load variation.

Keywords: pulse width modulation; PWM; digital PID control; sliding mode control; SMC; variable structure control; VSC; DC-DC converters; controller design; input voltage fluctuation; load variation.

DOI: 10.1504/IJMIC.2016.080293

International Journal of Modelling, Identification and Control, 2016 Vol.26 No.3, pp.273 - 282

Received: 25 May 2015
Accepted: 01 Sep 2015

Published online: 08 Nov 2016 *

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