Voltage Booster Research Articles

Magnetic coupling resonant ultra‐high voltage electric vehicle wireless charging system based on parity‐time symmetry

SummaryIn recent years, the electric vehicle (EV) industry has developed rapidly, and research on wireless charging systems for the EV is very meaningful. This paper proposes a magnetic coupling resonant ultra‐high voltage EV wireless charging system based on parity‐time symmetry to meet the need of high transmission efficiency and high transmission power for the EV wireless charging system. Through the application of magnetic coupling resonance and parity‐time symmetry, the charging system can maintain constant transmission efficiency within a larger spatial range, which greatly reduces the high‐precision requirements for coil alignment. Through the proposed intelligent coil alignment system, the alignment degree of the power transmission coil, user experience, and energy transmission efficiency can be improved further, promoting the intelligence of the charging system. At the same time, an ultra‐high voltage booster module is added to the primary side of the system to provide high‐power input for the EV charging system. Simulation analysis and experiments verify the rationality and practicability of the charging system. Finally, the practical significance of the proposed system applied to power grid inspection work is discussed.

Design and Simulation of a Cascade Boost DC-DC Converter as a Single-Phase Inverter Power Supply

Currently, the need for new renewable energy is getting higher, so the development of equipment in supporting this is increasingly rapid. designing an inverter that has a high output voltage can be done in several ways, namely by developing from the basic topology of the inverter or developing an inverter input side voltage boost DC-DC converter that has a high gain ratio capability or by using a step up transformer as an AC voltage booster, but it is inefficient considering that the step up transformer has a heavy weight, and reduces space. In this research the researchers designed a cascade boost converter as a single-phase inverter power supply. The cascade boost converter is used as a DC voltage increase where the DC high voltage is entered into a single phase inverter as a DC power supply and the inverter converts from DC-AC. Without using a step up transformer as an AC voltage booster. The inverter is combined with an LC filter as a wave filter to make it close to a sinusoidal wave. The simulation results show that the whole system is able to output a voltage of 220VAC RMS with a frequency of 50Hz.

Advancements in multilevel inverter technologies for photovoltaic-Z-source based EV applications: A comprehensive analysis and future directions

Global demand for electricity has risen, driving a shift toward sustainable energy sources like Photovoltaic (PV) systems. Despite their efficiency challenges compared to traditional fuels, significant investments and research are advancing the technology. This paper investigates multilevel inverter topologies, with a focus on Z-source technology for high-power PV applications. The study begins with an overview of the growing demand for alternative energy sources and the role of multilevel inverters in enhancing PV system performance. It discusses prominent multilevel inverter topologies, such as Neutral Point Clamped (NPC) and Cascaded H-Bridge (CHB) inverters, as well as control techniques including Pulse Width Modulation (PWM) and Predictive Control. Furthermore, it explores the functionality of Z-source inverters both with and without PV systems, highlighting their ability to provide voltage boosting, fault tolerance, and improved power quality. For load purposes, Electric Vehicle (EV) charging has been incorporated. The paper uses MATLAB/Simulink to compare multilevel inverter configurations and finds that the CHB inverter with Z-source is superior for PV applications due to its lower Total Harmonic Distortion (THD) and reduced semiconductor usage. The study also simulates a hybrid storage system with batteries and supercapacitors. The paper concludes with insights into future research directions, advanced control strategies, optimization techniques, and grid integration methods. These avenues promise further enhancement of efficiency, reliability, and grid compatibility for multilevel inverters in PV systems. Overall, this research contributes to the selection of optimal multilevel converter topologies for improving the performance of PV systems and advancing the integration of renewable energy into the electrical grid. The findings offer valuable insights for researchers, practitioners, and policymakers working toward a sustainable energy future.

Up to 45% Faster Supply Boosted Voltage Sense Amplifier (SBVSA) for High-Speed SRAMs

Up to 45% Faster Supply Boosted Voltage Sense Amplifier (SBVSA) for High-Speed SRAMs

Experimental Verification of Voltage Boost Control in a Hybrid System Using D-EPC

Experimental Verification of Voltage Boost Control in a Hybrid System Using D-EPC

A novel generalized multi input boosting multi-level inverter (MIB-MLI) for high-frequency AC (HFAC) power distribution

The simplified topology for the high-frequency ac (HFAC) power distribution method with a multi-level inverter (MLI) hybrid switched capacitor (SC) is introduced. Capacitors, switches, diodes, and DC sources are among the components that are reduced in the designed MIB-MLI (Multi Input Boosting Multi-level Inverter). Where asymmetric dc voltage sources are available, such as in renewable energy farm-based ac microgrids and current electric vehicle, this architecture is advantageous. The proposed inverter has the feature of self-balancing the capacitor voltages and voltage boosting by using the series-parallel conversion scheme. The quality of output power is increased when a dc source array is connected with the unidirectional switched converter. Moreover, if a major phase variation betwixt the output current along with the voltage is no more mandatory, multiple alive switches may be recouped with diodes. In the switched capacitor group ripple volatge is reciprocal to the output frequency, so the MIB-MLI is favorable for HFAC implementations. Also, this paper clarifies the operating theory of the complete network and switching condition covered by the sinusoidal pulse width modulation (SPWM) technique. Mathematical equation related to power loss and capacitor voltages are provided. The modeling and simulation results of the proposed seventeen-level (17-L) inverter are depicted in this paper. The findings have shown that the proposed inverter is superior at HFAC along with the power efficiency of the inverter is adequate with SPWM technique.

Comparative Evaluation of Three-Phase Inverter Topologies Based on Voltage Boosting Features

Voltage source inverter (VSI) is commonly used in industrial due to its stable operation and low cost. However, VSI needs to operate with an extra converter stage which is a DC-DC converter for voltage boosting purposes. In contrast, current source inverter (CSI) inherits voltage boosting features may become an alternative option to VSI. Yet, there were minimal research on CSI that dedicates to the voltage boosting features. This research focuses on comparing the voltage boosting features of CSI and VSI in both open-loop and closed-loop conditions. The performance of VSI and CSI are simulated using MATLAB/Simulink. Under open-loop operation, CSI produces a voltage boosting capability at approximately 55% higher than VSI. Yet, CSI suffers high THD percentage as compared to VSI for the same switching frequency. This high THD shortcoming can be easily resolved by using a simple CL filter. For closed-loop operation, VSI and CSI with voltage-controlled synchronous frame PI control systems are proven to have good reference tracking and harmonic rejection and are suitable to be implemented for household applications or for a standalone system. Interestingly, CSI closed-loop system can achieve a wider range of output due to the voltage boosting capability and provide a better quality of output waveform as compared to VSI.

Switched Capacitor Based Cascaded Half-Bridge Multilevel Inverter with Voltage Boosting Feature

Abstract: In many applications, cascading multilevel inverter (CMI) topologies are common. However, the biggest disadvantage of CMI is the need for many separate switches and DC sources. As a result, the CMI topology becomes more expensive, more complex, and larger, and its performance suffers. In the proposed SC-CHMI, only one DC source is used and the other DC sources are replaced by switched capacitor cells. Thanks to the self-balancing function, the capacitor charging process occurs naturally without the need for any auxiliary equipment. In the proposed SC-CHMI, the inrush current of the capacitor is attenuated using a load inductor or a front-end boost converter. To improve the performance of multi-level inverters, several types of techniques can be tested with existing multi-level inverters. Due to the modulation algorithm, modulation frequency, voltage drop on the switches and bus voltage modulation, the output voltage of the inverter has overall harmonic distortion, leading to overheating of the device and shortening the life of the device bag. In the proposed SC-CHMI, a level-shifted pulse width modulation technique is proposed to improve the output voltage quality and reduce the total harmonic distortion. This new control scheme is applicable to nine-level, eleven-level and fifteen-level SC-CHMI. The proposed topology can be used as a general-purpose inverter in renewable energy systems, due to its voltage gain characteristics, minimal number of switches, and single DC source. The effectiveness of the proposed inverter topology is confirmed by simulation results.

Switched Capacitor-Based Bidirectional Power Converter with Enhanced Voltage Boost and Reduced Switching Strain for Electric Vehicle Applications

This research work presents an improved design of a bidirectional converter for EVs, specifically focusing on its buck and boost operations. The proposed design incorporates a switched capacitor-based double switch converter, which offers enhanced performance compared to conventional converters. The utilization of switched capacitors reduces voltage stress on switches and improves overall efficiency, making it well-suited for electric vehicle applications. Moreover, the inclusion of synchronous rectification enables zero voltage switching, further enhancing the converter's performance. The effectiveness of the design is verified through MATLAB simulations, demonstrating improved voltage gain and reduced switch stress in both voltage increasing and decreasing modes.

A seven level fault tolerant hybrid cascaded inverter for renewable energy applications

Abstract The cascaded H-bridge (CHB) inverters are the prominent inverters used for renewable energy applications. Fault-tolerant operation is one of the foremost concerns to safeguard the continuous operation of the system under a fault on semiconductor switches and DC power supplies. A novel hybrid CHB inverter is proposed by adding a seven-level boost SLB module in cascade with the H-bridge modules. The proposed topology ensures the reliable and dynamic operation of the inverter during the occurrence of a fault. In addition to the fault-tolerant capability of the SLB inverter, the proposed design provides the voltage boosting and self-balancing of the switched capacitors. Extensive simulation results at different operating conditions substantiate the concept of the proposed novel fault-tolerant inverter structure. The prototype system is developed in the laboratory and the experimental results validate the proposed system configuration.

Comparison Of Conventional Z-source Inverter And Modified-Z-source Inverters

This paper investigates the performance analysis of the Modified-Z-Source Inverter with a simple voltage boost control method. The Z-Source network provides an efficient method of converting electricity in grid-connected solar applications, requiring only one step to fulfill the requirements. Nevertheless, high voltage stress and high voltage rating capacitor problems plague the Z-source inverter. In order to overcome these problems, a customised Z-network that maintains the same shoot-through duty ratio as a Z-source inverter is utilised to provide high boosted voltage. This research compares the performance of the modified Z-source inverter with the Z-source inverter using MATLAB.

A novel Prairie Dog Optimization Algorithm (PDOA) based MPPT controlling mechanism for grid-PV systems

<p>Recently, the solar photovoltaic (PV) systems are increasingly used in many application systems, due to their efficiency and cost-effectiveness. Still, extracting the maximum energy from PV panels under varying climatic conditions is one of the most significant problems. For this purpose, various optimization based MPPT controlling mechanisms are developed in the conventional works for obtaining the maximum energy yield. However, it suffers with the major problems of low convergence, computational burden, high time consumption to reach the optimal solution, and lack of efficiency. Therefore, this research work objects to implement a novel and recently developed optimization technique, named as, Prairie Dog Optimization Algorithm (PDOA) for MPPT controlling. With superior tracking efficiency and enhanced speed, it helps to extract the greatest power from the PV panels. In order to manage the output of PV with less switching stress and loss, a high gain interleaved SEPIC DC-DC converter is also used. A better power quality is ensured by using the voltage source inverter to lower harmonic distortion levels. The significance of the proposed study is to develop a novel optimization based MPPT controlling technique to obtain the maximum energy yield form the PV panels. The PDOA technique is not previously used for power extraction and MPP tracking, due to its intelligent best optimum solutions with high convergence, the proposed work uses the PDOA technique to optimally identify MPP. Also, the voltage boosting and conversion is performed with the use of high gain interleaved SEPIC converter with increased efficiency. Performance study evaluates and compares the simulation outcomes and the efficacy of the suggested regulating topology using a variety of metrics, including IV & PV characteristics, output voltage, output power, THD, grid output, peak time, settling time, and others.</p>

Taser - Stungun Semi-Automatic Advanced Security System Concept Test for Volvo FH - 12

Truck theft in Peru is ranked among the 10 most dangerous countries in the world. In that sense, the registered cases of vehicle theft in the year 2012 were a total of 16 357 and in the year 2019 was 20 159 stolen vehicles increasing a percentage of 18.89% in only 7 years. This paper shows as an objective, the development of the Proof of Concepts of an Advanced Security System Taser - Stungun semi-automatic for Volvo FH - 12. In this system, a TTL device (PIC) is used as hardware and a voltage booster from 5v to 5000v generating protection for the easiest and most valuable parts to steal. The proof of concept is activated by the user by buttons and sensors assigned for the protection of the truck, since the installed devices will be aesthetically located in the truck to not be found by the thief, besides being very reliable so that the driver can use it, also in its installation. The prototype will use a shock as self-defense since the system will generate an electric shock of 10 mA with a frequency of 2 seconds, which can immobilize or temporarily paralyze the thief. Therefore, it will analyze the alternatives with the help of the morphological matrix to choose the ideal solution, then we will design the electrical circuit, the programming in pseudocode, validating the proof of concepts, and the selection of the insulator. Finally, it must consider the correct selection of sensors and actuators thus allowing security reliability in different circumstances of the theft.

Why Increased CdSeTe Charge Carrier Lifetimes and Radiative Efficiencies did not Result in Voltage Boost for CdTe Solar Cells

AbstractAfter a focused effort over the last decade, order‐of‐magnitude improvements in doping and electro‐optical characteristics (radiative efficiency, carrier lifetime, and passivation) have been reported for polycrystalline CdSeTe solar cells. Surprisingly, this did not result in higher solar cell voltages regardless of device contacting layers, absorber grading profiles, and other changes in device architecture. From detailed evaluation of radiative emission and carrier dynamics in CdSeTe heterostructures and devices, it is shown that the complexity introduced to the absorber to achieve lifetime and passivation metrics resulted in charge carrier trapping, which now negatively affects CdSeTe absorbers. It is found that the defects with activation energy Ea ≈ 0.14‐0.22 eV dominate radiative emission and carrier dynamics in undoped CdSeTe, and electronic potential fluctuations with the amplitude γ ≈ 45–60 meV are present in As‐doped CdSeTe/CdTe. Because of potential fluctuations, radiative voltage is reduced by ≈ −100 mV, to = 1020‐1050 mV (for 1.4 eV bandgap). For record‐efficiency solar cells with VOC ≥900 mV, radiative and nonradiative recombination voltage losses are comparable, and future research needs to focus on reducing dopant compensation which causes potential fluctuations. This represents a paradigm shift for CdTe solar cells, with non‐radiative bulk recombination no longer representing a dominant voltage loss pathway.

A Reduced Switch Count Seven-Level Boost ANPC Based Grid Following Inverter Topology With Photovoltaic Integration

A boost active-neutral-point-clamped (BANPC) multilevel inverter based on a switched-capacitor network generally shows a bargain between the number of switches and its voltage rating. Moreover, control complexities are increased with the increase in switch count. In this paper, a new single-phase seven-level boosted ANPC (7L-BANPC) topology using 8(eight) switches, one floating capacitor, and one dc source is presented. The proposed inverter is capable of producing 1.5 times voltage boosting and needs a lower switch voltage rating. The efficiency of the proposed inverter is increased significantly due to lower rating switching devices and a reduced number of total conducting switches. The unipolar level-shifted sine pulse width modulation is considered for controlling the proposed inverter. A three-phase single-stage grid-connected SPV system with the proposed 7L-BANPC inverter is implemented. For the proposed system, theoretical analysis and design calculations are illustrated. The steady-state and dynamic performances of the proposed inverter as well as the grid-connected SPV system under different load power factors, modulation indices, and environmental conditions are simulated using the MATLAB/Simulink software and tested using OPAL-RT real-time emulator. A comparison with existing topologies clearly shows the benefits of the proposed inverter.

Single‐phase current‐fed switched‐capacitor five‐level inverter

SummaryWith an input‐side boost inductor, current source inverter (CSI) naturally has the unique performance of voltage boosting and continuous input current, but its switching devices need to have reverse blocking capability. Switched‐capacitor (SC) multilevel inverter (MLI) features self‐balancing capacitor voltages and flexible structure, but it suffers the problems of inrush charging current of capacitors and pulse input current. By combining the CSI's input characteristics and the SC‐MLI's output features, this work presents a new five‐level inverter. Its input current is continuous, and there is no inrush current. In addition, the voltage gain is improved to 2/(1−d), where d is the duty ratio of the inductor's charging mode. With the unique structure, the duty ratio ranges from 0 to 1, and it is independent of the modulation ratio of the inverter. This makes the control more flexible. In addition to topology, operation, and modulation, parameter design, power loss, and comparison study are analyzed in detail. Finally, simulation results with fuel cell as input, and experimental results are provided to verify the superior performance of the proposed inverter.

Review of Si-Based Thin Films and Materials for Thermoelectric Energy Harvesting and Their Integration into Electronic Devices for Energy Management Systems

Energy harvesters are autonomous systems capable of capturing, processing, storing, and utilizing small amounts of free energy from the surrounding environment. Such energy harvesters typically involve three fundamental stages: a micro-generator or energy transducer, a voltage booster or power converter, and an energy storage component. In the case of harvesting mechanical vibrations from the environment, piezoelectric materials have been used as a transducer. For instance, PZT (lead zirconate titanate) is a widely used piezoelectric ceramic due to its high electromechanical coupling factor. However, the integration of PZT into silicon poses certain limitations, not only in the harvesting stage but also in embedding a power management electronics circuit. On the other hand, in thermoelectric (TE) energy harvesting, a recent approach involves using abundant, eco-friendly, and low-cost materials that are compatible with CMOS technology, such as silicon-based compound nanostructures for TE thin film devices. Thus, this review aims to present the current advancements in the fabrication and integration of Si-based thin-film devices for TE energy harvesting applications. Moreover, this paper also highlights some recent developments in electronic architectures that aim to enhance the overall efficiency of the complete energy harvesting system.

Design and analysis of three phase inverter based Solar PV powered single switch Buck-Boost converter with reduced THD for industrial applications

The development of economical and sustainable eco-friendly renewable source powered power electronic converters have become more attractive in various areas such as automotive, household and industrial applications etc., Bucking and boosting of voltage according to the requirement is also much needed. So, this work proposes a solar PV powered single switch buck-boost converter which reduces implementation cost, minimal voltage and current stress across the capacitors and diodes and less switching power losses. The work structure comprises of solar PV source with modified P and O algorithm based MPPT, single switch buck-boost dc-dc converter, battery backup to store excess energy, three phase inverter with sinusoidal PWM to find optimal switching angles for harmonic control and 3Φ induction motor load. Here reduction of THD is applied to the line to line voltage of the inverter. Performance analysis of the proposed circuit is done using MATLAB/SIMULINK platform. A detailed steady state analysis of the dc-dc converter topology is also analyzed to system stability. The proposed single switch buck-boost converter is designed to provide an output voltage and current of 363V, 45.5A DC from 520V, 35A PV array. The designed converter is then employed to run a three phase full bridge inverter with 440V, 15A AC. From the simulation results, it is found that the solar powered single switch buck-boost with MPPT is stable, efficient with minimal losses and less THD with better quality output.

A High Gain Single Switch DC-DC Converter with Double Voltage Booster Switched Inductors

A High Gain Single Switch DC-DC Converter with Double Voltage Booster Switched Inductors

Design and analysis of a dual input quasi SB-SC cell high gain converter

ABSTRACT A DC-DC converter that can deliver high voltage gain and isolation with dual input is presented. The proposed converter incorporates a quasi-switched boost topology with an inductor in series with the main source. A switched capacitor cell and an auxiliary input source are connected before a push-pull switching stage to improve voltage boosting and the utilisation of dual input source. The high-frequency transformer provides galvanic isolation and improved voltage gain. The voltage doubler circuit (VDR) preceding the load has the ability to convert the transformer output to a DC supply and double the boost factor. Detailed operating waveform, theoretical and simulation results of the converter are presented with component selection and comparison with relevant converter topologies. A 250 W converter is implemented for an output of 400 V, when fed from two energy sources of 24 V and 12 V. The experimental results obtained satisfy the performance of the proposed converter. The benefits of the converter are (i) utilisation of hybrid energy sources, (ii) near to continuous input current, (iii) galvanic isolation and (iv) very high boost voltage.