Non-linear Cascade Control of DC/DC Buck Converter

Tsang, K.M.; Chan, Wai Lok

doi:10.1080/15325000801960937

Cited by 8 publications

(3 citation statements)

References 8 publications

(8 reference statements)

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“…In the cascade control scheme, the current loop acts as a secondary controller. The detailed equations of the voltage and current loops are available in [36]. The output of the voltage loop is considered as a reference inductor current for the current loop.…”

Section: Inner Current Control Loopmentioning

confidence: 99%

Analyzing the Effectiveness of Single Active Bridge DC-DC Converter under Transient and Load Variation

2023

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Over the last couple of years, the use of DC-DC converters is being widely used in several applications. The need for a reliable and robust converter for application is very important because of the social impact that it can have on the losses in high-power electronics applications and output efficiency. This paper gives a comprehensive review of single-active-bridge (SAB) converters. The detail modelling and performance evaluation of SAB topology with PI controllers are also presented in this article. The performance of SAB topology is analyzed under transient and load variations. Due to the nonlinear behavior of SAB topology, the traditional PI controllers have not minimized transient disturbances. The major problem with the usage of conventional controllers and traditional configurations for the SAB converter are the ripples, which are generated in output voltage and current. These ripples severely affect the performance of the SAB converter. An effort has been made to analyze and contribute to the importance of a robust controller to mitigate the converter dynamics. This article also gives an in-depth dynamic analysis of SAB converters, which were controlled using PI controllers and failed to perform satisfactorily under non-linearities.

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Section: Inner Current Control Loopmentioning

confidence: 99%

Analyzing the Effectiveness of Single Active Bridge DC-DC Converter under Transient and Load Variation

2023

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“…In past, the controller design was based on using small signal linearization. Linear PID and PI controllers of the converters are usually designed by using standard frequency response techniques based on small signal model of the converter by using linear control theories such as Ziegler-Nichol's method, root locus technique, hysteresis method, Bode plot and etc [16][17][18][19][20]. Although these control methods based on the linearized small signal model of the converter have good performance around the operating point, but the small signal model changes with variations of the operating point.…”

Section: Introductionmentioning

confidence: 99%

H-GA-PSO Method for Tuning of a PID Controller for a Buck-Boost Converter Modeled with a New Method of Signal Flow Graph Technique

2015

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In this paper, a new method of signal flow graph technique and Mason's gain formula are applied for extracting the model and transfer functions from control to output and from input to output of a buckboost converter. In order to investigate necessity of a controller for the converter with assumed parameters, the frequency and time domain analysis is done and the open loop system characteristics are verified. In addition, the needed closed loop controlled system specifications are determined. Moreover, designing a controller for the mentioned converter system based on the extracted model is discussed. For this purpose, a proportional-integral-derivative (PID) controller is designed and the hybrid of genetic algorithm (GA) and particle swarm optimization (PSO), called H-GA-PSO method is used for tuning of the PID controller. Finally, the simulation results are used to show the performance of the proposed modeling and regulation methods.

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“…It is widely used in practice, sometimes in a transparent way (embedded into the electronics of a servoactuator [1], controlled power supply [2], process control [3] etc.). The general block diagram of cascade control is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Cascade Generalized Predictive Control

Geng¹,

Zhao²

2014

IJIS

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Cascade control is one of the most popular structures for process control as it is a special architecture for dealing with disturbances. However, the drawbacks of cascade control are obvious that primary controller and secondary controller should be tuned together, which influences each other. In this paper, a new Adaptive Cascade Generalized Predictive Controller (ACGPC) is introduced. ACGPC is a method issued from GPC and the inner and outer controllers of a cascade system are replaced by one cascade generalized predictive controller, where both loops model are updated by Recursive Least Squares method. Compared with existing methods, the new method is simpler and yet more effective. It can be directly integrated into commercially available industrial auto-tuning systems. Some examples are given to illustrate the effectiveness and robustness of the proposed method.

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Non-linear Cascade Control of DC/DC Buck Converter

Cited by 8 publications

References 8 publications

Analyzing the Effectiveness of Single Active Bridge DC-DC Converter under Transient and Load Variation

Analyzing the Effectiveness of Single Active Bridge DC-DC Converter under Transient and Load Variation

H-GA-PSO Method for Tuning of a PID Controller for a Buck-Boost Converter Modeled with a New Method of Signal Flow Graph Technique

Adaptive Cascade Generalized Predictive Control

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