Chaos phenomenon in UC3842 current-programmed flyback converters

Hsieh, Fei-Hu; Lin, Kai-Min; Su, Juing‐Huei

doi:10.1109/iciea.2009.5138190

Cited by 9 publications

(6 citation statements)

References 5 publications

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“…In this circuit V c is the error amplifier output and converter output voltage V out1 is the input to the error amplifier. Bode plot is obtained for transfer function given in (6). Mid frequency gain, pole frequency and zero frequency of the system are calculated.…”

Section: E Compensationmentioning

confidence: 99%

Simulation and hardware implementation of 24 watt multiple output Flyback converter

Nagesha¹,

Sreedevi²,

Gopal

2015

2015 International Conference on Power and Advanced Control Engineering (ICPACE)

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DC-DC converters are mainly used to provide required output voltage by suitably controlling the pulse width modulated (PWM) signal given to the gate of the fast acting power electronics switches. Flyback converter is one such popular isolated DC-DC converter topology used to obtain regulated output voltage in low power applications. They are used as power supply systems in space technology and in many other industrial power electronics systems, where having constant voltage is very much essential. This paper presents Simulation and practical implementation of multiple output Flyback converter with Silicon Carbide (SiC) MOSFET as switching device. The designed Converter is observed to have a good output voltage regulation and higher efficiency for the wide input voltage range. Index Terms-Multiple output Flyback converter, Silicon Carbide MOSFET, Current mode controller, Converter efficiency. 978-1-4799-8371-1/15/$31.00 c 2015 IEEE

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Section: E Compensationmentioning

confidence: 99%

Simulation and hardware implementation of 24 watt multiple output Flyback converter

Nagesha¹,

Sreedevi²,

Gopal

2015

2015 International Conference on Power and Advanced Control Engineering (ICPACE)

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“…Above all, there are fewer studies presented on the flyback and forward converters [9]. Recently, F. H. Hsieh, P. L. Chang and H. K. Wang had a series of research on chaos phenomena in the converters [10][11][12][13]. Discrete components are generally used while applying chaos research to power converters.…”

Section: State Equations Of Flyback Convertermentioning

confidence: 99%

Switching frequency influence of flyback converter's nonlinear phenomena

Hsieh

Wang

Chang

et al. 2013

2013 International Conference on Machine Learning and Cybernetics

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This paper investigates the nonlinear behaviors when the switching frequency changed in the UC3842 current-mode controlled flyback converter. First, State equations of the flyback converter are derived. The converter in continuous conduction mode (CCM) is then considered. Second, MATLAB/SIMULINK is used to construct simulation of the converter whose operation under varying switching frequency parameters. The output voltage, inductor current waveforms and phase-plane portraits are observed. It can be seen that the system exhibits nonlinear dynamics from period-one operation through period-doubling to chaos phenomena as the switching frequency are changed. From the simulation results, it is clearly evident that SIMULINK provide consistent results and verify the mathematical models and able to really understand the nonlinear behavior of the flyback converter.

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“…Even after recti¯cation, there are still various harmonics, bifurcation, chaos, and other nonlinear behaviors. [1][2][3] In recent years, the studies on nonlinear phenomena in power factor correction (PFC) converter are gradually increasing, but most of them are based on the existing research results of DC-DC converters, [4][5][6][7][8][9][10] and focus on the causes of bifurcation and chaos. In addition, most models use the simple open loop or monocyclic control, which limits their practical application.…”

Section: Introductionmentioning

confidence: 99%

Feed-Forward Slope Compensated PFC for Chaos Control

Yang

Zhu

et al. 2015

J CIRCUIT SYST COMP

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Based on the dual-loop control peak current mode power factor correction (PFC) converter, a feed-forward slope compensation method is proposed, which could regulate the compensated slope real-time and suppress the loop perturbation, thus controlling chaos of the system for better stability. A dual-loop Boost PFC model with the feed-forward slope compensation is built to analyze the nonlinear phenomena in system, and the corresponding circuit structure is presented. The chaos control ability of the feed-forward slope compensation is studied theoretically, and the relation of compensated slope and feed-forward signal is deduced, as well as slope stability conditions. The simulation and measured results show that this method could e®ectively suppress system bifurcation and chaos phenomena, and improve the system working range and dynamic response speed, and eliminate the in°uence on system stability for without compensated, under compensated, and over compensated.input disturbance-rejection, as well as the fast response speed. So it is necessary and signi¯cant to study the dual-loop PFC converter to control its nonlinear phenomena. However, the nonlinear behaviors are di±cult to control for uncertain, which probably result in unpredictable system working state, and give rise to a high total harmonic distortion (THD) and poor power factor (PF). Now the proposed system chaos control methods include parameter perturbation control, feedback control, pole control, and so on. Although most are easy to realize, their complex control modes often restrict the application. The slope compensation control provides an e®ective solution. The reasonable compensation network could simplify the system to be¯rst-order, thus ameliorating the bifurcation and chaos phenomena. But the¯xed compensated slope existing probably causes over compensation or under compensation, and¯nally reduces the applicable working voltage range and transient response speed. To make up for the drawbacks above, a feedforward signal is introduced in the slope compensation, which regulates the loop gain according to real-time disturbance, and reduces the bandwidth requirements of feedback control loop, thereby decreasing or eliminating the noise interference,¯nally inhibiting chaos.Based on the dual-loop peak current mode Boost PFC, a feed-forward slope compensation circuit is proposed to control chaos, with the system model. The simulation and measured results verify the validity and feasibility of the proposed circuit. The feed-forward slope compensation provides PFC converter an e®ective way to control nonlinear phenomena and improve stability, as well as better working range and dynamic response.The rest of this paper is organized as follows. In Sec. 2, PFC model in dual-loop peak current mode with the slope compensation is presented. In Sec. 3, the feedforward slope compensation control is proposed, with the actual circuit. In Sec. 4, the simulation and measured results are performed to verify the e®ectiveness of this work. The conclusions and discussion a...

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Chaos phenomenon in UC3842 current-programmed flyback converters

Cited by 9 publications

References 5 publications

Simulation and hardware implementation of 24 watt multiple output Flyback converter

Simulation and hardware implementation of 24 watt multiple output Flyback converter

Switching frequency influence of flyback converter's nonlinear phenomena

Feed-Forward Slope Compensated PFC for Chaos Control

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