A New Nonlinear Controller for Multilevel DC/DC Boost Converter

2020 ◽  
Author(s):  
Milad Andalibi ◽  
Mojtaba Hajihosseini ◽  
Meysam Gheisarnejad ◽  
Jalil Boudjadar ◽  
Mohammad-Hassan Khooban ◽  
...  
Keyword(s):  
Boost Converter ◽  
Nonlinear Controller

scholarly journals A Novel Nonlinear Control of Boost Converter using CCM Phase Plane

2018 ◽  
Vol 8 (6) ◽  
pp. 4282
Author(s):  
Eko Setiawan ◽  
Ichijo Hodaka
Keyword(s):  
Phase Plane ◽  
Controller Design ◽  
Control Strategies ◽  
Initial Point ◽  
Boost Converter ◽  
State Variables ◽  
Nonlinear Controller ◽  
Electrical Systems ◽  
Constant Output ◽  
Conduction Mode

<p>Boost converter is one of fundamental DC-DC converters and used to deliver electric power with boosted voltage in many electrical systems. Several control strategies have been applied to control a boost converter delivering a constant output voltage. Generally, boost converter works in two modes; one is called a Continuous Conduction Mode (CCM). Many researches use CCM model in the controller design, but they never ensure that the controller always works in CCM. This paper proposes novel nonlinear controller of boost converter designed using the modification of flow in phase plane. The proposed controller guarantees that the boost converter works only in CCM region. The simulation result confirms that our proposed controller brings the state variables from any initial point to a desired operating point successfully.</p>

Observer based control scheme for DC-DC boost converter using sigma–delta modulator

2018 ◽  
Vol 37 (2) ◽  
pp. 784-798 ◽  
Author(s):  
Milad Malekzadeh ◽  
Alireza Khosravi ◽  
Mehdi Tavan
Keyword(s):  
Input Voltage ◽  
Boost Converter ◽  
Nonlinear Observer ◽  
Resistive Load ◽  
Nonlinear Controller ◽  
Sigma Delta Modulator ◽  
Sigma Delta ◽  
Content Type ◽  
Control Scheme ◽  
Controller Performance

PurposeIn actual application of a DC-DC boost converter, the input voltage and resistive load may be changed frequently, and these variations deteriorate the conventional controller performance. The purpose of this paper is to present an observer-based control scheme for a DC-DC boost converter with an unknown resistive load and input voltage. Design/methodology/approachTo estimate the unknown input voltage and resistive load, a nonlinear observer is designed by using the Lyapunov stability theorem. In addition, the closed-loop stability of the proposed control scheme for the DC-DC boost converter is proven. To convert the continuous control input to discrete mode, a sigma–delta modulator is used. FindingsThe proposed control scheme is validated in different situations. The adaptive structure of the proposed control scheme is tested by the input voltage, load and reference signal variation, and the simulation results confirm the capability of the proposed observer-based control strategy. Originality/valueThe contribution of this paper is twofold: according to nonlinear controller design, the feedforward term of the nonlinear controller is obtained via the observer, and unlike the proportional–integral controller, performance deterioration in the input voltage and load variations are unraveled. The effectiveness of this method is validated by experimental implementation in the presence of load and input voltage variations, and the experimental results confirm the efficacy of the proposed strategy.

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