Design Of Inverter Research Articles

ANALYSIS OF CIRCUITS WITH UNIFORM PHASE SHIFT OF INVERTER CELLS

ANALYSIS OF CIRCUITS WITH UNIFORM PHASE SHIFT OF INVERTER CELLS

Design and Implementation of Single-Phase Grid-Connected Low-Voltage Battery Inverter for Residential Applications

Integrating residential energy storage and solar photovoltaic power generation into low-voltage distribution networks is a pathway to energy self-sufficiency. This paper elaborates on designing and implementing a 3 kW single-phase grid-connected battery inverter to integrate a 51.2-V lithium iron phosphate battery pack with a 220 V 50 Hz grid. The prototyped inverter consists of an LCL-filtered voltage source converter (VSC) and a dual active bridge (DAB) DC-DC converter, both operated at a switching frequency of 20 kHz. The VSC adopted a fast DC bus voltage control strategy with a unified current harmonic mitigation. Meanwhile, the DAB DC-DC converter employed a proportional-integral regulator to control the average battery current with a dynamic DC offset mitigation of the medium-frequency transformer’s currents embedded in the single-phase shift modulation scheme. The control schemes of the two converters were implemented on a 32-bit TMS320F280049C microcontroller in the same interrupt service routine. This work presents a synchronization technique between the switching signal generation of the two converters and the sampling of analog signals for the control system. The prototyped inverter had an efficiency better than 90% and a total harmonic distortion in the grid current smaller than 1.5% at the battery power of ±1.5 kW.

Analysis of the performance of a 25-level inverter with a minimum number of switches and reduced harmonics for an environment solar energy

A multilevel inverter is a type of electrical equipment that converts a DC voltage to a higher AC value by creating a stepped waveform using several voltage levels. Multilevel inverters may create waveforms with three or more voltage levels, although regular inverters cannot. This separation results in lower harmonic distortion, decreased electromagnetic interference, and higher efficiency. An innovative MLI design that makes use of fewer switches and PV sources solves this problem. The Perturbation and Observation (P&O) approach is used to derive the Maximum Power Point Tracking (MPPT) from these PVs. The MC-SPWM technique was used in the design, simulation, and construction of single-phase and three-phase multilevel inverters with inverter levels ranging from three to twenty-five. The technique's cornerstones are phase disposition (PD-PWM) and power quality improvement. The main goal of the paper objectively analyzing the issue of power-system harmonics, providing information on causes, effects, and useful harmonic mitigation strategy.

Design and implementation of grid tied high step-up DC-DC converter with switched capacitor

In this paper, the design and implementation of a three-phase grid-connected inverter coupled with a high step-up DC-DC converter with a switched capacitor is demonstrated. In this converter two capacitors are utilized with a coupled inductor. The charging of capacitors takes place parallel and discharging in series during switch off and switch on time respectively. The energization of the coupled inductor provides the high voltage gain. The passive clamp circuit is used to recycle the leakage energy of the inductor circuit. Therefore, the switch stress is reduced. This high gain converter is given DC input of 40 V and a high voltage 538 V obtained is supplied to the grid connected inverter which uses sinusoidal pulse width modulation (SPWM), to obtain 3phase line-neutral voltage of 415 V from inverter for grid synchronization. A high voltage gain of 13 and efficiency of 96% is obtained for different load and voltage variation. The modeling and the simulation are done using physical security information management (PSIM) software and all the results are presented in this paper.

Advancing battery energy storage system: State‐of‐health aware state‐of‐charge balancing in multilevel inverters for electric transportation

AbstractThis research presents an innovative methodology for enhancing battery energy storage systems for electrically powered transportation, utilizing a distinctive cascaded H‐bridge multilevel inverter design, termed P‐CHBMI. Central to this work is the development of a state‐of‐health aware state‐of‐charge (SoH‐aware‐SoC) balancing technique, which leverages an advanced algorithm integrated with a Proportional‐Integral (PI) controller technique to efficiently balance battery cells according to their state‐of health (SoH). This technique significantly improves operational efficiency and extends the lifespan of battery systems by intelligently optimizing cell discharge processes. Moreover, this research work delivers a wide range of simulations for the generation of a streamlined control algorithms for the development of the symmetric and asymmetric configuration of the P‐CHBMI. Similarly, recommended topology is proficient of equal voltage discharge across battery cells, which is an exclusive property of the conventional cascaded H‐bridge topology. The study includes extensive MATLAB/Simulink simulations to validate the superiority of the P‐CHBMI and the SoH‐aware‐SoC balancing method over conventional systems, highlighting substantial enhancements in switch count efficiency, operational flexibility, and battery durability. Further, the practical applicability of the proposed topology is evidenced through a hardware implementation of a symmetric 5‐level inverter. This study plays a significant role in the development of the inverter technology particularly in off‐grid scenarios such as electric vehicle and aircrafts, keeping the battery efficiency and reliability as a most important factor.

Novel hybrid-CMOS inverter utilizing phase transition material for enhancing digital logic performance at lower operating voltages

This research paper introduces a novel design for a hybrid-CMOS inverter using vanadium dioxide (VO2), a phase transition material. The proposed inverter exhibits a remarkably steep transition for falling logic at the output(1–0). By leveraging the insulating to metallic current density (IC-IMT) of VO2, the depth and gain of this transition can be finely tuned. Notably, a higher IC-IMT value yields a greater gain in the transition slope. In comparison to a traditional CMOS inverter, the designed inverter demonstrates several advantages. It achieves higher values of lower noise margin (NML) and significantly reduces static power dissipation by 97.7%. These promising outcomes present an exciting opportunity for designing inverters at lower drain voltages, especially in devices operating at lower technology nodes. Furthermore, the hybrid-CMOS inverter is designed to excel in the sub-threshold region of operation, resulting in elevated values of lower noise margin and reduced leakage current values.

Design and development of single-phase inverter for locomotives based on SVPWM

For locomotive in high-power inverter power supply output efficiency is low, the level is not stable, push-pull circuit before the switch tube of high pressure, low utilization rate of the original winding transformer problem, designed and developed a kind of single phase inverter power supply based on SVPWM control. The inverter is designed with a modular structure with a rated power of 4KW, which is used to supply power to the cab electrical apparatus and auxiliary air compressor at both ends of the locomotive. It is composed of a filter circuit, a front-end boost control drive circuit, a full-bridge DC boost circuit, an inverter control circuit, a voltage and current sampling circuit, a back-end full-bridge inverter circuit and a protection circuit. The front stage of the inverter adopts a full bridge chopper circuit topology, while the rear stage achieves SVPWM control through the Vacon NXS control box. Finally, a power supply prototype was produced through simulation verification, and the results showed that the designed power supply met the design requirements.

Load-Impedance-Insensitive Design of High-Efficiency Class EF Inverters

Load-Impedance-Insensitive Design of High-Efficiency Class EF Inverters

Design and development of photovoltaic solar system based single phase seven level inverter

For solar photovoltaic (PV) systems, an upgraded triple gain seven-level inverter that works both independently and while connected to the grid is proposed. The two-stage configuration of the system is boost cascaded. The first stage has a one switch improved gain converter (OSIGC) to increase and normalize the input direct current (DC) voltage, and the second stage includes a unique seven level alternating current (AC) is produced via a multilevel inverter (MLI) design with triple voltage gain. The proposed OSIGC is appropriate for a broad range of conversions. The voltage gain in MLI was achieved using switched capacitor techniques. The DC-DC converter can achieve a maximum voltage gain of twelve and the MLI can achieve a maximum voltage gain of three, resulting in a DC-DC-AC voltage that can reach 36. Maximum power point tracking (MPPT) technique based on modified perturb and observe (PO) is used in OSIGC to maximise PV module power utilisation, and MLI control utilises sinusoidal pulse width modulation (SPWM) realistically. For the purpose of analysing the suggested system, a 200 Watt prototype statel is created. With a total harmonic distortion (THD) of 0.181%, up to 92.12% of the converter system’s overall efficiency is possible.

A simple zero-voltage switching technique for a single-phase inverter based on bi-directional inductor current

The majority of soft-switching inverters often use auxiliary semiconductor switches that run for extremely brief periods to provide ZVS conditions for the main switches, potentially raising the inverter system’s cost. This work presented a simple zero-voltage switching (ZVS) approach by employing a bi-directional inductor current for the single-phase inverter, which reduced the cost of auxiliary switches and simplified the soft-switching inverter design. All switches can achieve ZVS operation without additional resonant components. The conventional PWM control strategies are applied in the proposed technique, and thus the problems existing in variable switching frequency converters are removed. This article describes the soft-switching approach and detailed circuit functioning. Different key parameters are optimized to improve efficiency. To confirm the suggested ZVS method, a hardware inverter prototype is created, built, and tested. To validate the inverter’s characteristics and validity, experimental results are presented.

Design and Implementation of a High-gain Switched-capacitor Step-up Multi-level Inverter with Reduced Components Count

Emergence of compact design power converters for applications such as photovoltaic system, active power filter, and high-frequency AC system has introduced multi-level inverters (MLIs). In the last decade, rigorous research has been carried out to transform multi-input MLIs to single-input step-up type that will be extremely beneficial in different applications. The proposed MLI in this work is a reduced components based switched-capacitor MLI. It consists of one input source and using the capacitor voltage, it can produce a four-time step-up output. One of the capacitors is charged to magnitude the input voltage and the other two capacitors are charged to two-time the input voltage magnitude. The charging of all the capacitors is executed by utilizing them in series-parallel combination with the switching operation. By maintaining charging–discharging effectively within each cycle, the voltages are naturally balanced. A thorough comparison is carried to justify the new development in terms of reduction in number of components and voltage stress. The power loss is estimated in the proposed circuit in detail. Extensive analysis is carried out to verify the operational ability and results are provided under different scenarios such as change in modulation index, load, and supply side variations.

Design, development and verification of a new multilevel inverter for reduced power switches

Design, development and verification of a new multilevel inverter for reduced power switches

Analysis and Design of Droop-Controlled Grid-Forming Inverters Using Novel WD Agg Approach

Analysis and Design of Droop-Controlled Grid-Forming Inverters Using Novel WD Agg Approach

Control Design of Passive Grid-Forming Inverters in Port-Hamiltonian Framework

Control Design of Passive Grid-Forming Inverters in Port-Hamiltonian Framework

Design of Unipolar Pure Sine Wave Inverter with Spwm Method Based On Esp32 Microcontroller As a Support of The Ebt System On Ship

Along with developments in the maritime sector, especially on ships, the need for electric power on board will be very diverse. The use of diesel engines as power plants requires fuel to drive a diesel while the use of fuel in ships produced from petroleum processing is limited. Efforts to reduce the use of fuel is by implementing new renewable energy as independent electricity on ship. In EBT inverter technology plays an important role in converting DC voltage to AC voltage. In the inverter, the use of microcontrollers as drivers to generate PWM signals continues to develop. One of the developments of the microcontroller is ESP32. The problem that often occurs in inverters is that the output voltage is unstable. In addition to maximizing the performance of the inverter, it is necessary to add a protection system to reduce the risk of damage to the inverter or the load. Therefore, an inverter was made using the ESP32 microcontroller driver with the addition of protection and the fuzzy method as a voltage stabilizer. This inverter will change the 12 Vdc to 220 vac. In the Matlab simulation, the inverter can change the 12 vdc to 12 vpeak with a carrier signal of 20 khz and a reference signal of 50 hz. From the results of the inverter output will be changed to 220 vac using a step up transformer. The research overlay is being able to make a pure sine wave SPWM inverter using an ESP32 driver with a stable voltage.

Design and Implementation of Transformer-less Common-Ground Inverter With Reduced Components

Nowadays, common-ground-type (CGT) based transformer-less inverters (TIs) are gaining more popularity in photovoltaic (PV) applications owing to their low cost, weight of the systems, losses and zero ground leakage current. For PV applications, a separate boost converter is often used to boost the low PV array voltage, resulting in increased component count, cost and lower efficiency. To resolve this issue, switched-capacitor (SC) based CGT inverter with reduced component count is proposed in this paper. The proposed amalgamation of CGT and SC technique, results in inherent boosting and zero ground leakage current. In the proposed inverter, SCs are connected in series/parallel with the dc voltage source for several instances in a fundamental cycle preserving the self-voltage balancing ability. Therefore, the proposed topology is devoid of voltage sensors to balance the voltage across SCs. Further, A simplified logic gatebased pulse-width-modulation strategy is developed. In addition, the benefits of proposed inverter are highlighted and compared with the other recent SC inverter topologies with regard to boosted voltage, elimination of leakage current and reduced component count. A laboratory prototype is developed by using DS1202/1302 dSPACE controller and experimental results are presented for both steady state and dynamic conditions and verifying the feasibility of the proposed TI.

Analysis and Design of SiC Three-Phase Four-Wire Five-Level E-Type STATCOM Inverter

Analysis and Design of SiC Three-Phase Four-Wire Five-Level E-Type STATCOM Inverter

Analysis of Inverter Output Current Ripple and Design of Inverter-Side Output Filter Inductor for Grid-Connected Applications

Analysis of Inverter Output Current Ripple and Design of Inverter-Side Output Filter Inductor for Grid-Connected Applications

Multilevel Inverters Design, Topologies, and Applications: Research Issues, Current, and Future Directions

Multilevel Inverters Design, Topologies, and Applications: Research Issues, Current, and Future Directions

Enhancing Solar PV Performance: Advanced Converters for Efficient Green Energy Conversion and Grid Compatibility

This paper delves into the vital role of converters in enhancing the efficiency and reliability of solar photovoltaic (PV) systems. With the escalating demand for renewable energy sources, solar PV systems emerge as a sustainable solution, necessitating advanced power electronics for optimal performance. The study highlights various DC-DC converters, such as buck, boost, and buck-boost converters, analyzing their functionalities in achieving maximum power point tracking (MPPT) and their implications on system cost, efficiency, and limitations. Further examination of gridconnected PV systems underscores the necessity for sophisticated inverter designs to ensure high efficiency, minimal harmonic distortion, and effective power management. Through MATLAB SIMULINK simulations, the paper evaluates the performance of solar PV systems equipped with different converter and inverter configurations, addressing the challenges posed by power fluctuations and the integration of solar energy into the grid. The research contributes to the ongoing discourse on renewable energy integration, presenting innovative solutions for grid synchronization, voltage regulation, and harmonic distortion reduction in solar PV systems.