Добірка наукової літератури з теми "Interleaved-Boost Converter (IBC)"

Renewable energy is derived from natural resources and most commonly used renewable energy system is photovoltaic cells. DC-DC boost converter serves many purposes and usually required in many applications which has a low output voltage such as batteries, photo-voltaic cell. In this paper interleaved boost converter (IBC) topology is discussed for solar energy generation. IBC have better performance characteristics compared to a conventional boost converter due to increased efficiency. DC-DC IBC have been considered and analyzed by input current ripple and output current ripple and output voltage ripple. The waveforms of voltage and current ripples and the output voltage are obtained by using MATLAB/SIMULINK are presented. The design of inductor, capacitor and analysis of ripples has been presented.

Solar photovoltaic (SPV) panels that convert light energy into electrical energy through the photovoltaic effect have nonlinear internal resistance. Hence, with the variation in the intensity of light falling on the panel, the internal resistance varies. For effective utilization of the SPV panel, it is necessary to extract the maximum power from it. For maximum power extraction from SPV panels, DC-DC converter interface is used. The problem in using high frequency converter interface is the resultant high frequency ripple interaction with the SPV system. In this work, an interleaved boost converter (IBC) is considered to reduce the ripple. Our finding is that IBC fed by a SPV panel reduces this ripple to a greater extent. IBC also has a faster transient response as compared to conventional boost converters with reduced ripple contents. The main aim of this paper is to present a comparative analysis of the performance of IBC with inductors that are coupled in different ways. The results of the simulation were extrapolated with the help of MATLAB software and verified through experimentation.

The step-up converters are widespread use in many applications, including powered vehicles, photovoltaic systems, continuous power supplies, and fuel cell systems. The reliability, quality, maintainability, and reduction in size are the important requirements in the energy conversion process. Interleaving method is one of advisable solution for heavy-performance applications, its harmonious in circuit design by paralleling two or more identical converters. This paper investigates the comparison performance of a two-phase interleaved boost converter with the traditional boost converter. The investigation of validation performance was introduced through steady-state analysis and operation. The operation modes and mathematical analysis are presented. The interleaved boost converter improves low-voltage stress across the switches, low-input current ripple also improving the efficiency compared with a traditional boost converter. To validate the performance in terms of input and output ripple and values, the two converters were tested using MATLAB/SIMULINK. The results supported the mathematical analysis. The cancelation of ripple in input and output voltage is significantly detected. The ripple amplitude is reducing in IBC comparing with a traditional boost converter, and the ripple frequency is doubled. This tends to reduce output filter losses, and size.

Renowned for their adeptness in smoothing current flow and maintaining balanced operation, 2-phase interleaved boost converters (IBC) demonstrate remarkable efficiency, especially when confronted with demanding loads. This makes them a preferred choice for high-power applications such as renewable energy systems, high-power supplies, and electric vehicle power trains. In contrast, standard boost converters are typically favored in low-power, low-demand scenarios. The control of a 2-phase IBC involves running two boost converters in parallel but with a phase shift to reduce ripple currents, improve efficiency, and increase power handling capabilities. To ensure stability and optimal performance, the control strategies for these converters focus on achieving balanced operation between the phases. Hence, the control of 2-phase IBC presents a significant challenge due to their non-minimum phase behavior. The core focus of this article is the implementation of a composite model predictive control (MPC) technique to regulate a 2-phase interleaved boost converter. It introduces a novel approach, model predictive sliding mode control (MPSMC), which leverages the strengths of both MPC and sliding mode control (SMC). The benefits of this hybrid method, termed MPSMC, are thoroughly developed and simulated using MATLAB/Simulink. The results, as discussed in the respective section, provide an in-depth understanding of its effectiveness in practical applications.

<span lang="EN-GB">This paper presents the simulation between fuel cell model and interleaved DC-DC boost converter (IBC) using a constant voltage maximum power point tracking (MPPT) technique. The main advantage of this method is it had the simplest algorithm and can be computed for the high efficiency IBC. The MPPT technique forces the fuel cell to meet the maximum power that the fuel cell can generate. To test the IBC along with the MPPT algorithm, MATLAB/Simulink simulation is carried out. This MPPT method increases the efficiency of power delivered from the fuel cell. The IBC has also chosen for its advantages of reduction of passive component's size, as well as reduced the current ripple that could affect the fuel cell stack. It is envisaged that the MPPT method of constant voltage gives a handful of help in designing a low cost and high efficient fuel cell system along with the interleaved boost converter chosen</span>

Abstract Interleaved boost converters (IBCs) are cascaded in parallel in most of the applications. This novel approach connects IBC in series cascade. The IBC has an optimal operating duty cycle of 0.5. Normally, photovoltaic source voltage is low because of space constraints. In order to boost the source voltage, a conventional boost converter is replaced with series-cascaded IBC in this paper. The single-stage IBC also boosts the voltage to twice the input voltage. In the proposed converter, output voltage is about four times the input voltage with the same 0.5 duty cycle. A mathematical model is developed and simulated for the proposed work in MATLAB/Simulink platform. The output of the proposed circuit is analysed through fast Fourier transform to know the harmonic content due to the switching. The system is tested for stability with signal-flow graph modelling. The proposed work is realised using hardware and tested to validate the model.

The partially shaded photovoltaic (PSPV) condition reduces the generated power and contributes to hot spot problems that may lead to breakdown of shaded modules. PSPV generates multiple peak, one global one and many other local peaks. Many efficient, accurate and reliable maximum power point tracker (MPPT) techniques are used to track the global peak instead of local peaks. The proposed technique is not limited to global peak tracking, but rather it is capable of tracking the sum of all peaks of the PV arrays using an interleaved boost converter (IBC). The proposed converter has been compared with the state of the art conventional control method that uses a conventional boost converter (CBC). The converters used in the two PSPV systems are interfaced with electric utility using a three-phase inverter. The simulation findings prove superiority of the PSPV with IBC compared to the one using CBC in terms of power quality, reliability, mismatch power loss, DC-link voltage stability, efficiency and flexibility. Also, IBC alleviates partial shading effects and extracts higher power compared to the one using CBC. The results have shown a remarkable increase in output generated power of a PSPV system for the three presented scenarios of partial shading by 61.6%, 30.3% and 13%, respectively, when CBC is replaced by IBC.

The recent growth of battery-powered applications has increased the need for high-efficiency step-up dc-dc converters. The step-up conversion is commonly used in several applications, such as electric vehicle (EV); plug-in hybrid electric vehicles (PHEV); photovoltaic (PV) systems; uninterruptible power supplies (UPS); and fuel cell systems. The input current is shared among inductors by paralleling the converters; resulting in high reliability and efficiency. In this paper; a detailed analysis for reducing power loss and improving efficiency is discussed. In continuous conduction mode; the converters are tested with a constant duty cycle of 50%. The multi phase interleaved boost converter (MPIBC) is controlled by interleaved switching techniques; which have the same switching frequency but phases are shifted. The efficiency of the six phase IBC model is 93.82% and 95.74% for an input voltage of 20 V and 200 V, respectively. The presented six phase MPIBC is validated by comparing it with the existing six phase IBC. The result shows that the presented converter is better than the existing converter. The prototype of the two phase and six phase IBC is fabricated to test the performance. It is found that the output power at the load end is highest for the 5 kHz switching frequency.

DC-DC Interleaved Boost Converter (DC-DC IBC) topology was developed through the interleaving technique since conventional DC-DC Boost Converter has many problems related to complex circuit control, harmonics, and output power. In this research, DC-DC IBC was developed into a Two-Phase AC-AC Interleaved Boost Converter (TP AC-AC IBC), then combined with a Two-Phase Full Bridge Inverter to become a Two-Phase DC-AC Interleaved Boost Inverter (TP DC-AC IBI). TP DC-AC IBI has several advantages, including minimal current and voltage ripples and greater output power because it consists of two AC-AC IBCs. This research aims to meet highly regulated AC voltage needs with the renewable energy source input using the proposed topology, by implementing Proportional Integral (PI) close loop control system. The output voltage is detected using a voltage transducer LV-25P, then compared with a reference voltage and controlled using a PI controller to keep the output voltage consistently stable. The switching signal setting uses the Sinusoidal Pulse Width Modulation (SPWM) technique by modulating the control output with a high frequency. As a verification step, testing was carried out using Power Simulator (PSIM) software and then validated by hardware testing in the laboratory. Testing was carried out using several test signals, and it was found that the proposed method worked well. System efficiency and Total Harmonic Distortion (THD) tests carried out using various load values, and a maximum efficiency of 93.87% and a minimum THD of 2.46% were obtained.

By employing the power factor corrected circuits the supply current will tend to follow the supply voltage. Hence both are in phase with each other. Single-stage interleaved AC–DC converter with ripple steering technique is proposed in this paper to reduce line current harmonics and to improve the supply power factor. Interleaved Boost Converter (IBC) topology with ripple steering technique is analysed here. The proposed IBC with ripple steering is simulated in MATLAB/SIMULINK and the performance parameters such as supply Harmonics, Power Factor (PF) and Distortion Factor (DF) are computed and compared with conventional topology. Experimental results show the advantages and flexibilities of the proposed method.

Les hacheurs élévateurs à quatre phases parallèles et à commandes entrelacées (4IBC) sont largement utilisés dans les véhicules électriques à hydrogène (FCEVs) afin d’adapter la tension de la pile à combustible (PAC) au bus DC, assurer la tolérance aux défauts et réduire les ondulations de courant de la PAC. Etant donné que le poids et le volume constituent de réelles contraintes dans ces applications, la topologie du hacheur élévateur à quatre phases parallèles couplées inversement en cascade cyclique (4IBC-IC) a été adoptée. L’objectif de cette thèse consiste à améliorer la disponibilité des convertisseurs DC/DC, qui constitue une préoccupation majeure dans l’électronique de puissance. Dans ce contexte, un contrôle tolérant aux défauts de type court-circuit (SCF) et de type circuit ouvert (OCF), a été développé. La méthode de diagnostic proposée se base sur la mesure de la valeur moyenne des courants des inductances pour pouvoir identifier la phase en défaut, l’isoler et reconfigurer les signaux de commandes des phases saines. La régulation de la tension de sortie et des courants de phases est assurée par des correcteurs PI. Cette approche a été validée par simulation sur Matlab/Simulink et en simulation virtuelle en temps réel (VHIL) sur le logiciel Typhoon. Ces principaux résultats démontrent l'efficacité et la robustesse de cette approche à maintenir un fonctionnement optimal en mode sain et défaillant, sans générer de fausses détections.En raison des difficultés rencontrées pour obtenir des inductances couplées, la validation expérimentale de l’approche proposée a été validée sur un convertisseur 4IBC classique. Le contrôle tolérant aux défauts (FTC) a été exécuté et intégré sur La MicroLabBox DS1202 en utilisant une implémentation mixte entre son processeur et sa carte FPGA. Les résultats expérimentaux valident l’efficacité des résultats de simulation. Cette approche ne nécessite pas de capteurs supplémentaires, ni de temps d'échantillonnage élevé et elle est facile à mettre en œuvre. Elle peut facilement être intégrée aux contrôles existants et peut même être étendue à d'autres topologies de convertisseurs multi-phases.Afin de remédier aux limitations du correcteur PI, une amélioration des boucles de régulations a été proposée en utilisant des contrôleurs non-linéaires, qui sont robustes aux perturbations et aux variations et permettent d'améliorer la dynamique du convertisseur. Cette approche repose sur le contrôle par platitude de la tension de sortie et le contrôle par mode glissant pour la régulation des courants de phases. La particularité de cette amélioration est l'utilisation d'un observateur pour estimer la tension d'entrée et le courant de charge, afin d'optimiser judicieusement le nombre de capteurs sans utiliser de capteurs supplémentaires. L'approche de diagnostic proposée est également intégrée et communique les informations de présence de défauts avec les boucles de régulation et avec l'observateur afin d'optimiser le fonctionnement du convertisseur en mode défaillant. Les résultats de simulation montrent la robustesse de cette approche face aux variations et aux perturbations. Ces contributions améliorent la disponibilité et la robustesse des convertisseurs DC/DC et renforcent la position des FCEVs en tant qu'option viable et prometteuse pour le transport durable
Fuel cell electric vehicles (FCEVs) are seen as potential solutions and represent one of the most recent advances in the field of transport to reduce CO2 emissions. As the fuel cell is the main power source, a boost converter is required to increase its low voltage and adapt it to the DC bus voltage. The four-phase interleaved DC/DC boost converter with inverse cyclic cascade coupled inductors (4IBC-IC) has been confirmed as the most suitable architecture for fuel cell electric vehicles. Not only does it improve efficiency and reduce the converter’s size, but it also helps to extend the fuel cell's lifespan by reducing input current ripple. Since semiconductors are very fragile components, they can fail and degrade fuel cell system performance. Even if the converter architecture is fault-tolerant, it requires a fault-tolerant controller to ensure optimal operation in the event of disturbances or faults. In this context, a signal-based fault-tolerant control is proposed in this thesis to diagnose both short-circuit fault (SCF) and open-circuit-fault (OCF). Once the fault is detected, it is isolated by the control unit and the converter architecture is then reconfigured according to the fault location to ensure optimal operation. PI correctors are implemented to ensure the regulation of the output voltage and phase currents. Due to the unavailability of coupled inductors, this approach has been validated experimentally on a classical four-phase interleaved boost converter (4IBC) test bench using the MicroLabBox DS1202 with its processor and internal FPGA board to implement the fault-tolerant control.Simulation, on Matlab/Simulink and virtual hardware simulation (VHIL), and experimental results validate the robustness of the proposed fault-tolerant control. It is easy to implement and can quickly identify faults without the need for additional sensors. It operates efficiently without requiring high sampling rates, addressing one of the key limitations of signal-based methods. Given its simplicity of implementation, the proposed method can be easily integrated into existing controls and can even be extended to other multilevel converter topologies.To improve the robustness of the control unit, a novel fault-tolerant robust control approach has been proposed by replacing the traditional PI controllers with flatness-based and sliding mode controllers while incorporating an observer. The observer plays a key role in accurately estimating the input voltage and load current, ultimately ensuring high robustness against disturbances. A judicious optimization of the number of sensors is thus achieved, minimizing the cost and the probability of measurement errors. Simulation results in the Matlab/Simulink environment confirm the effectiveness of this approach. This significant contribution strengthens the reliability and robustness of DC/DC converters with coupled inductors and consolidates the position of the FCEVs as a promising sustainable mobility solution