Fuzzy Logic Controller for Cascaded H-Bridge Multilevel Inverter

Sivakumar, N.; Sumathi, A.

doi:10.11591/ijai.v4.i3.pp105-112

Cited by 2 publications

(1 citation statement)

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“…It is cleared from the table that the harmonic spectrum is reduced to such an extent that it looks like a pure sine wave. When we compared the traditional CHB and the proposed CHB, the THD spectrum for the proposed CHB is slightly higher than the traditional CHB as provided in Muhammad et al (2017), Sivakumar and Sumathi(2015) and Chaitra and Chandrashekar(2021). The reason for this is due to the proposed PWM control signal that also contributes in small harmonics.…”

Section: Simulation Results and Its Discussionmentioning

confidence: 93%

Comparative study on minimization of conduction and switching losses in cascaded multilevel inverter via reduced switches and equal voltage source-sharing

Batool

Malik

Muhammad

et al. 2022

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Purpose Multilevel inverters play a major role in the development of high-power industrial applications. In traditional low-level inverters (e.g. 2-level), the switching frequency is restricted and the harmonic spectrum of the system is hard to meet power requirements. Similarly, high-level inverters consist of a large number of switches, complex modulation techniques and complex hardware architecture, which results in high power loss and a significant amount of harmonic distortion. Furthermore, it is a must to ensure that every switch experiences the same stress of voltage and current. The purpose of this paper is to present an inverter topology with lower conduction and switching losses via reduced number of switches and equal voltage source-sharing technique. Design/methodology/approach Herein, the authors present a cascaded multilevel inverter having less power switches, a simple modulation technique and an equal voltage source-sharing phenomenon implementation. Findings The modulation technique becomes more complex when equal voltage source-sharing is to be implemented. In this study, a novel topology for the multilevel inverter with fewer switches, novel modulation technique, equal voltage source-sharing and Inductor-Capacitor-Inductor filter implementation is demonstrated to the reduce harmonic spectrum and power losses of the proposed system. Originality/value The nine-level inverter design is validated using software simulations and hardware prototype testing; the power losses of the proposed inverter design are elaborated and compared with the traditional approach.

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Section: Simulation Results and Its Discussionmentioning

confidence: 93%

Comparative study on minimization of conduction and switching losses in cascaded multilevel inverter via reduced switches and equal voltage source-sharing

Batool

Malik

Muhammad

et al. 2022

View full text Add to dashboard Cite

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Fuzzy logic based voltage control scheme for improvement in dynamic response of the class D inverter based high frequency induction heating system

Nagarajan¹,

Sathi²,

Vishnuram³

2016

Turk J Elec Eng & Comp Sci

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Abstract:In high frequency induction heating systems, the effective load parameters change during the different operating conditions. It is necessary to maintain constant input voltage to the induction heating load to improve the quality of the heating. The resonant based high frequency converter is generally used for these applications for the reduction of switching losses. The resonant condition is also affected during the variation in load parameters. The controller should provide a good voltage regulation with less response time and less overshoot during the loading conditions. In this paper, a load adaptive fuzzy logic control scheme is proposed to perform the voltage control of the high frequency inverter under variable load conditions. A frequency tracking control system is also employed for the inverter system using the phase lock loop. The phase lock loop ensures the resonant frequency operation of the inverter during the change in load parameters. The state space model of the system is discussed to study the inverter during different operating conditions. The fuzzy logic controller based closed loop control scheme is developed using the MATLAB simulation tool. The responses of the conventional and fuzzy logic controllers are studied for load voltage regulation and the effectiveness of the control schemes is verified. The dynamic behavior of the system is studied under no load and loaded conditions with the two controllers. The fuzzy based closed loop control scheme improves the dynamic response of the system compared to the conventional controller. The response of the induction heating system is validated with a hardware prototype. The results are presented in order to confirm the proposed control strategy.

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Fuzzy Logic Controller for Cascaded H-Bridge Multilevel Inverter

Cited by 2 publications

References 0 publications

Comparative study on minimization of conduction and switching losses in cascaded multilevel inverter via reduced switches and equal voltage source-sharing

Comparative study on minimization of conduction and switching losses in cascaded multilevel inverter via reduced switches and equal voltage source-sharing

Fuzzy logic based voltage control scheme for improvement in dynamic response of the class D inverter based high frequency induction heating system

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