A Novel Buck–Boost Converter Combining KY and Buck Converters

Hwu, K. I.; Peng, T. J.

doi:10.1109/tpel.2011.2182208

Cited by 141 publications

(67 citation statements)

References 10 publications

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“…To overcome these drawbacks pulse width modulation (PWM) AC-DC converters are used, which effectively regulate the output DC voltage and have a low value of THD. The PWM AC-DC converters have the capability of bi-directional power flow, unit power factor, low THD and a regulated DC voltage at the output [1][2][3]. To regulate the operation of three phase PWM AC-DC converters, proportional integral (PI) and proportional integral derivative (PID) controllers are commonly used.…”

Section: Introductionmentioning

confidence: 99%

Fuzzy Logic Controller for Three Phase PWM AC-DC Converter

2017

JEEEM

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Abstract. This paper discusses control strategy for the voltage regulation of a three phase pulse width modulation (PWM) AC-DC converter. A fuzzy logic controller (FLC) is employed in the outer voltage loop. Fuzzy logic controllers are preferred over the conventional proportional integral (PI) controllers because they are based on linguistic description and do not require a prior mathematical model of the system. The objective of the presented control system is to regulate the output DC voltage during both transient and steady state period. Also the line currents drawn from the grid should be sinusoidal and in phase with respective phase voltages to achieve a low total harmonic distortion (THD) and unity power factor. PI and FLC based control systems are implemented for three phase PWM AC-DC converter in MATLAB/Simulink and dynamic performance of the system is tested. The results demonstrate that compared to the conventional PI, the FLC based system is more robust and has a much better dynamic response. The low value of THD and sinusoidal current response ensures the system avoids polluting the utility grid.

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Section: Introductionmentioning

confidence: 99%

Fuzzy Logic Controller for Three Phase PWM AC-DC Converter

2017

JEEEM

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“…Hence for this small scale application such as battery it is needed to regulate the output voltage of the converter with high precision & performance. Thus, a trade-off among cost, efficiency, and output transients should be considered [6]. For space-restrained application, the regulation of the output voltage in the midrange of a variable input battery voltage is a common handling issue [11].…”

Section: Introductionmentioning

confidence: 99%

Performance of Positive Buck-Boost Converter with Mode Select Circuit and Feed-Forward Techniques Using Fuzzy Logic Controller

Latha¹

2015

IJRITCC

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Abstract-This project is a highly efficient & novel control strategy for improving the transient in the output voltage of a dc-dc positive buckboost converter which is required for low portable devices. The portable devices development of semiconductor manufacturing technology, conversion efficiency, power consumption, and the size of devices have become the most important design criteria of switching power converters. For portable applications better conveniences extension of battery life and improves the conversion efficiency of power converters .It is essential to develop accurate switching power converters, which can reduce more wasted power energy. The proposed topology can achieve faster transient responses when the supply voltages are changed for the converter by making use of the feed forward n etwork .With mode select circuit the conduction & switching losses are reduced the positive buck-boost converter operate in buck, buck-boost, or boost converter. By adding feed-forward techniques, the proposed converter can improve transient response when the supply voltages are changed. Hence Positive buck-boost converters with mode select circuit &feed forward techniques using fuzzy logic converter is designed And the modeling & experimental results were verified in MATLAB/ Simulink

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“…For this case, some control techniques such as V 2 control, hysteretic control, or multi-channel buck topology are utilized to improve static and dynamic performance [3][4][5]. The major contributions of [3] is to characterize digital V 2 control with different ramp compensations, and propose a hybrid-ramp compensation concept for reducing the current sensing gain requirements for the stability issue.…”

Section: Introductionmentioning

confidence: 99%

“…The major contributions of [3] is to characterize digital V 2 control with different ramp compensations, and propose a hybrid-ramp compensation concept for reducing the current sensing gain requirements for the stability issue. A buck-boost converter with a positive output voltage is presented in [5], which combines the KY converter (a novel voltage-bucking/boosting converter) and the traditional synchronously rectified (SR) buck converter. The problem in voltage bucking of the KY converter can be solved, thereby increasing the application capability of the KY converter.…”

Section: Introductionmentioning

confidence: 99%