Performance Evaluation of a Direct AC-DC Boost Converter for Piezo-Electric Energy Harvesting System

Sujapradeepa, M.; Asis, A. Allwyn Clarence; EdwardRqjan, S.

doi:10.1109/icctct.2018.8550875

Cited by 2 publications

(1 citation statement)

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“…It is noticeable that over the positive half cycle switch operates. however, in the negative cycle the switch is operating and is off [11]. In this study, the Boost and the Buck-Boost converters are controlled with the same duty cycle to ensure stable output voltage.…”

Section: Converter Operationmentioning

confidence: 99%

Comparative Study Between Sliding Mode Controller and PI Controller for AC/DC Bridgeless Converter Under Uncertain Parameters

Almobaied,

Musleh

2022

Acta Electrotechnica Et Informatica

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In this paper, a comparative study between nonlinear sliding mode controller (SMC) and standard PI controller for stabilizing bridgeless AC/DC converter under uncertain parameters is presented. This type of converters is widely used in harvesting low energy systems as in wind turbine, piezoelectric transducers and heat exchange transducers. Designing robust controllers to enhance the efficiency and accuracy of these converters has become a promising track in control engineering field. The traditional bridge rectifier is widely used in the majority types of AC/DC conventional converters to gain the rectified DC voltage from the low AC input voltage source. However, these traditional converters are not effective for the low output voltage of renewable sources due to the voltage drops across rectifier’s diodes. The proposed SMC-PI controller is used to enhance the stability and the response of these converters under uncertain parameters comparing with the standard PI controller. The proposed approach consists of both Boost and Buck-Boost converters with two controllers in order to maximize the useful output energy from the source. The graphical method has been used to obtain the limitation of the coefficients of the standard PI controller. A parameter space approach is used to find all robust stabilization PI coefficients and the stability regions. A comparative study using simulations in MATLAB is presented to ensure the effectiveness and robustness of the proposed SMC-PI controller under some external disturbances.

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Section: Converter Operationmentioning

confidence: 99%