Quantization and Sampling Effects in Fast Digitally Controlled Switch-Mode DC/DC Buck Converters

2021 ◽  
Author(s):  
Martin Schubert ◽  
Wai-Kong Lee ◽  
Boon-Yaik Ooi
Keyword(s):  
Buck Converters ◽  
Switch Mode ◽  
Digitally Controlled

FPGA-Based Expert PID Controller for Buck DC-DC Converter

2013 ◽  
Vol 431 ◽  
pp. 215-220 ◽  
Author(s):  
Yao Chen ◽  
Chang Yuan Chang ◽  
Yan Yan
Keyword(s):  
Pid Controller ◽  
Stable Steady State ◽  
Buck Converters ◽  
Steady State Response ◽  
Control Laws ◽  
State Response ◽  
Digitally Controlled ◽  
Expert Theory ◽  
Expert Pid ◽  
Better Than

In this paper, an expert PID controller used for digitally controlled DC-DC buck converters is proposed. It is designed bycombing expert theory with traditional PID theory, basing on the controlled objects and the knowledge of control laws. The controller uses the expert experiences to regulate the PID parameters online according to the dynamic characteristics of the system. The simulation and practical results indicated that, comparing with conventional PID controller, the expert PID controller which has faster startup transient response, smaller overshoot and more stable steady-state response, is better than conventional PID controller. It is well fit for the demand of control system.

Control of limit cycles in buck converters

2014 ◽  
Vol 33 (4) ◽  
pp. 1448-1461 ◽  
Author(s):  
Marissa Condon ◽  
Brendan Hayes
Keyword(s):  
Limit Cycles ◽  
Mathematical Analysis ◽  
Pid Control ◽  
Design Methodology ◽  
Buck Converter ◽  
Digital Controller ◽  
Buck Converters ◽  
Content Type ◽  
Comb Filters ◽  
Digitally Controlled

Purpose – The purpose of this paper is to investigate limit cycles in digitally Proportional, Integral and Derivative (PID) controlled buck regulators. Filtering is examined as a means of removing the limit cycles in digitally controlled buck regulators. Design/methodology/approach – The paper explains why limit cycles occur in a digitally PID controlled buck converter. It then proceeds to propose two filters for their elimination. Results indicate the effectiveness of each of the filters. Findings – The paper gives a mathematical analysis of the occurrence of limit cycles in digitally controlled PID buck regulators. It finds that notch and comb filters are effective for the purpose of eliminating limit cycles in buck regulators. Originality/value – The paper employs a model of the buck regulator inclusive of the inductor loss – this was not done to date for this type of work. The paper analyses PID control. This was not done in the manner given. The paper addresses filtering as a means of removing limit cycles. It examines the effect of changing the digital controller parameters on the requirements of the filters.

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