scholarly journals A nine-switch nine-level converter new topology with optimal modulation control

2021 ◽  
Vol 12 (2) ◽  
pp. 932
Author(s):  
Radouane Majdoul ◽  
Abelwahed Touati ◽  
Abderrahmane Ouchatti ◽  
Abderrahim Taouni ◽  
Elhassane Abdelmounim
Keyword(s):  
Pulse Width Modulation ◽  
Power Transmission ◽  
Industrial Applications ◽  
Power Converter ◽  
Power Semiconductors ◽  
High Voltage Direct Current ◽  
Switching Losses ◽  
Power Switches ◽  
Flying Capacitors ◽  
Modulation Control

<span lang="EN-US">Multilevel power converters are becoming increasingly used in several sectors: energy, grid-tie renewable energy systems, High voltage direct current (HVDC) power transmission, and a multitude of industrial applications. However, the multilevel converters consist of several drives and a high number of power switches, which leads to a considerable cost and an increased size of the device. Thus, a novel topology of a multilevel bidirectional inverter using a reduced number of semiconductor power components is proposed in this paper. Without any diode clamped or flying capacitor, only nine switches are used to generate nine voltage levels in this new topology. The proposed multilevel converter is compared with the conventional structures in terms of cost, the number of active power switches, clamped diodes, flying capacitors, DC floating capacitors, and the number of DC voltage sources. This comparative analysis shows that the proposed topology is suitable for many applications. For optimum control of this multilevel voltage inverter and to reduce switching losses in power semiconductors, a hybrid modulation technique based on fundamental frequency modulation and multi-carrier-based sinusoidal pulse-width modulation schemes is performed. The effectiveness of the proposed multilevel power converter is verified by simulation results.</span>

scholarly journals Improved 25-level inverter topology with reduced part count for PV grid-tie applications

2021 ◽  
Vol 12 (3) ◽  
pp. 1687
Author(s):  
Radouane Majdoul ◽  
Abelwahed Touati ◽  
Abderrahmane Ouchatti ◽  
Abderrahim Taouni ◽  
Elhassane Abdelmounim
Keyword(s):  
Harmonic Distortion ◽  
Minimum Cost ◽  
Cost Effective ◽  
Power Converter ◽  
Dc Voltage ◽  
Switching Losses ◽  
Power Switches ◽  
Flying Capacitors ◽  
Basic Source ◽  
Inverter Topology

<span lang="EN-US">A new bidirectional multilevel inverter topology with a high number of voltage levels with a very reduced number of power components is proposed in this paper. Only TEN power switches and four asymmetric DC voltage sources are used to generate 25 voltage levels in this new topology. The proposed multilevel converter is more suitable for e-mobility and photovoltaic applications where the overall energy source can be composed of a few units/associations of several basic source modules. Several benefits are provided by this new topology: Highly sinusoidal current and voltage waveforms, low Total Harmonic Distortion, very low switching losses, and minimum cost and size of the device. For optimum control of this 25-level voltage inverter, a special Modified Hybrid Modulation technique is performed. The proposed 25-level inverter is compared to various topologies published recently in terms of cost, the number of active power switches, clamped diodes, flying capacitors, DC floating capacitors, and the number of DC voltage sources. This comparison clearly shows that the proposed topology is cost-effective, compact, and very efficient. The effectiveness and the good performance of the proposed multilevel power converter (with and without PWM control) are verified and checked by computational simulations.</span>

scholarly journals A New Configuration of Three-Level ZSI Using Transistor Clamped Topology

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1469
Author(s):  
Santosh Sonar
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Performance Degradation ◽  
Space Vector ◽  
Power Semiconductors ◽  
Power Switches ◽  
Modulation Schemes

In this paper, a three-level ZSI (impedance source inverter) based on transistor clamped theory is proposed. It uses the least number of switch counts and associated gate circuitry among all existing topologies of three-level ZSI without any performance degradation. The existing three-level ZSI topologies require three power switches to be turned ON for upper-lower shoot-through (ULST), and four power switches to be turned ON for full dc-link shoot-through (FST). However, with the proposed configuration, upper–lower shoot-through (ULST) and full dc-link shoot-through (FST) is inserted by turning ON only two power semiconductors. A comparison between diode clamped, transistor clamped, and t-type is presented. The proposed topology can realize any of the existing sine-triangle- or space vector-based PWM (pulse width modulation) schemes, and all existing configurations of three-level ZSI can merge into the proposed inverter configuration.

Synchronized Symmetrical Bus-Clamping PWM Strategies for Three Level Inverter: Applications to Low Switching Frequencies

2011 ◽  
Vol 12 (2) ◽  
Author(s):  
Sreenivasappa Bhupasandra Veeranna ◽  
Udaykumar R Yaragatti ◽  
Abdul R Beig
Keyword(s):  
Pulse Width ◽  
Output Voltage ◽  
High Performance ◽  
Pulse Width Modulation ◽  
Industrial Applications ◽  
Voltage Source ◽  
Switching Frequency ◽  
Space Vector ◽  
Digital Implementation ◽  
Switching Losses

The digital control of three-level voltage source inverter fed high power high performance ac drives has recently become a popular in industrial applications. In order to control such drives, the pulse width modulation algorithm needs to be implemented in the controller. In this paper, synchronized symmetrical bus-clamping pulse width modulation strategies are presented. These strategies have some practical advantages such as reduced average switching frequency, easy digital implementation, reduced switching losses and improved output voltage quality compared to conventional space vector pulse width modulation strategies. The operation of three level inverter in linear region is extended to overmodulation region. The performance is analyzed in terms THD and fundamental output voltage waveforms and is compared with conventional space vector PWM strategies and found that switching losses can be minimized using bus-clamping strategy compared to conventional space vector strategy. The proposed method is implemented using Motorola Power PC 8240 processor and verified on a constant v/f induction motor drive fed from IGBT based inverter.

scholarly journals Performance Analysis of TRIAC and MPWM of AC Voltage Controller Fed Capacitor Run Induction Motor

2019 ◽  
Vol 8 (4) ◽  
pp. 7981-7986
Keyword(s):  
Induction Motor ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Industrial Applications ◽  
Input Power ◽  
Main Concern ◽  
Voltage Controller ◽  
Modulation Control ◽  
Sinusoidal Pulse Width Modulation

Single phase capacitor run induction motor is necessary to operate meritoriously and enhance the power quality. AC voltage controller is utilized effectively for controlling the speed of the motor. It employs conventional TRIAC and sinusoidal pulse width modulation control. The performance parameters are total harmonic distortion, input power factor and efficiency are the main concern. The comparative analysis of the two methods was simulated using MATLAB Simulink platform. Speed control of capacitor run induction motor used in domestic and industrial applications.

VHDL Implementation of Capacitor Voltage Balancing Control with Level-Shifted PWM for Modular Multilevel Converter

2016 ◽  
Vol 7 (1) ◽  
pp. 94
Author(s):  
Chuen Ling Toh ◽  
Lars Einar Norum
Keyword(s):  
Pulse Width Modulation ◽  
Power Transmission ◽  
Small Scale ◽  
Modular Multilevel Converter ◽  
Multilevel Converter ◽  
Voltage Balancing ◽  
High Voltage Direct Current ◽  
Capacitor Voltage ◽  
Balancing Control ◽  
Vhdl Implementation

Power electronics converters are a key component in high voltage direct current (HVDC) power transmission. The modular multilevel converter (MMC) is one of the latest topologies to be proposed for this application. An MMC generates multilevel output voltage waveforms which reduces the harmonics contents significantly. This paper presents a VHDL implementation of the capacitor voltage balancing control and level-shifted pulse width modulation (LSPWM) for MMC. The objective is to minimize the processing time with minimum gate counts. The design details are fully described and validated experimentally. An experiment is conducted on a small scale MMC prototype with two units of power cells on each arm. The test results are enclosed and discussed.

Design of High-Performance Synchronous Buck DC-DC Converters Using GaN Power HEMTs

2012 ◽  
Vol 717-720 ◽  
pp. 1307-1310
Author(s):  
Krishna Shenai ◽  
Krushal Shah
Keyword(s):  
High Performance ◽  
Figure Of Merit ◽  
Low Voltage ◽  
State Of The Art ◽  
Power Converter ◽  
Power Mosfets ◽  
Switching Losses ◽  
Power Switches ◽  
Load Regulation ◽  
Application Specific

Simple, physics-based, and accurate circuit models are reported for GaN power HEMTs and inductors; these models are then used to design high-performance chip-scale synchronous buck (SB) power converters to provide agile point-of-load (POL) low-voltage ( down to 1V) high-current (up to 10A) power to portable mobile devices from a battery. Excellent agreement between the measured and simulated results is demonstrated for load regulation for a 19V/1.2V, 800 kHz SB converter; for comparison, the same converter performance using the best commercially available state-of-the-art silicon power MOSFETs is also evaluated. It is shown that the conventional approach used for estimating power loss of a SB power converter is in error; a new application-specific Figure of Merit (FOM) for power switches is proposed that accounts for both input and output switching losses.

scholarly journals A simplified hysteresis current control for cascaded converter fed switched reluctance motor

2019 ◽  
Vol 9 (6) ◽  
pp. 5095
Author(s):  
Anuradha Devi Tellapati ◽  
Malligunta Kiran Kumar
Keyword(s):  
Control Method ◽  
Switched Reluctance Motor ◽  
Industrial Applications ◽  
Current Control ◽  
Switched Reluctance ◽  
Hysteresis Current Control ◽  
Switching Losses ◽  
Cascaded Converter ◽  
Reluctance Motor ◽  
Power Switches

<p>Simple constructional features with no windings on rotor circuit and robustness make switched reluctance motor (SRM) a most used motors in industrial applications. Peak motor voltage rating depends on the rated voltage of the power switches. In conventional asymmetrical converter driving SRM, voltage rating of the motor depends on rating of power electronic switches in converter. Demand to rise the motor rating insists to put pressure on converter switching components which results in increased switching losses. A cascaded converter topology for SRM reduces the rating of switching components as compared to conventional converters for SRM. This paper presents a cascaded converter fed SRM drive with reduced switching losses. The paper presents a simplified hysteresis current control (HCC) for cascaded converter fed SRM. Simplified HCC control method reduces switching losses as HCC is applied to only one bridge of cascaded converter. Though the performance of the SRM remains same with cascaded converter fed SRM with HCC applied to only one bridge or to two bridges and with conventional asymmetrical converter, the switching losses are reduced to a great extent when HCC applied to one bridge of cascaded converter fed SRM. Performance of SRM is illustrated with conventional asymmetrical converter fed SRM and is compared to cascaded converter while HCC applied to only one bridge and applied to two bridges of cascaded converter. Proposed work is simulated using MATLAB/SIMULINK and results are presented.</p>

scholarly journals Inverter 5-Tingkat Tiga Fasa Empat Kawat menggunakan STM32F407 untuk Catu Daya Mandiri

2021 ◽  
Vol 9 (1) ◽  
pp. 177
Author(s):  
IVANILES PUTRA UTAMA DAGOMIS ◽  
LEONARDUS HERU PRATOMO
Keyword(s):  
Pulse Width Modulation ◽  
Power Converter ◽  
Maximum Power ◽  
Switching System ◽  
Maximum Power Point ◽  
Maximum Power Point Tracker ◽  
Three Phase ◽  
Power Switches ◽  
Power Point ◽  
Sinusoidal Pulse Width Modulation

ABSTRAKSalah satu energi terbarukan adalah pembangkit listrik tenaga surya (PLTS), yang menggunakan photovoltaic (PV) sebagai sarana konversi energi. Untuk mendapatkan daya maksimal, menggunakan konverter DC-DC beralgoritma maximum power point tracker (MPPT). Sistem di Indonesia menggunakan tiga fasa empat kawat (TFEK), sehingga sistem perlu diintegrasi menjadi satu, dikenal dengan nama konversi dua tahap. Masalah yang muncul adalah konverter TFEK lazim diimplementasi menggunakan konverter daya empat lengan, di mana setiap lengannya terdapat dua buah sakelar daya. Hal ini akan mengakibatkan sistem pensaklaran yang tinggi, tapis dan stress tegangan yang besar untuk mendapatkan THD rendah. Oleh karena itu, telah diteliti inverter TFEK menggunakan 5-level inverter. Metode modulasi lebar pulsa digital sinusoidal (MLPDS) digunakan untuk mengendalikan setiap sakelar (IRFP 460) dengan menggunakan mikrokontrol jenis STM32F407. Verifikasi menggunakan perangkat lunak PSIM dan prototype. Berdasarkan hasil pengujian, metode yang dilakukan mampu menghasilkan arus dan tegangan keluaran inverter TFEK dengan THD tegangan sebesar 4,38%.Kata kunci: Inverter 5-tingkat, Tiga fasa empat kawat, STM32F407, THD ABSTRACTOne of the renewable energy is solar power plant (PLTS), which uses photovoltaic (PV) as a means of energy conversion. To get maximum power, use a DC-DC converter with a maximum power point tracker (MPPT). The system in Indonesia uses three-phase four-wires (TPFW), the system needs to be integrated into one, as two-stage conversion. The problem is that TPFW converters are commonly implemented using four-leg power converter, where each leg has two power switches. This will result in high switching system, large filters, and stress voltage to get low THD. Hence, the TPFW inverter 5-level inverter has been investigated. The sinusoidal pulse width modulation (SPWM) method is used to control each switch (IRFP 460) using an STM32F407 microcontroller. Verification with PSIM software and prototype. Based on the results, the method used can produce the current and output voltage of the TPFW inverter with a voltage THD of 4.38%.Keywords: five-level inverter, three-phase four-wire, STM32F407, THD

Single phase full bridge inverter with coupled filter inductors and voltage doubler for PV module integrated converter system

2009 ◽  
Vol 57 (4) ◽  
pp. 355-361 ◽  
Author(s):  
Y. Jiang ◽  
J. Pan
Keyword(s):  
High Frequency ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Bridge Circuit ◽  
Voltage Source ◽  
Control Cost ◽  
Switching Losses ◽  
Pv Module ◽  
Voltage Doubler ◽  
Modulation Control

Single phase full bridge inverter with coupled filter inductors and voltage doubler for PV module integrated converter systemThis paper presents a single phase full bridge inverter with coupled filter inductors and voltage doubler for PV module integrated converter (MIC) system. In DC/DC stage, full bridge circuit with high frequency sinusoidal pulse width modulation control is used, and high frequency transformer with voltage doubler rectifier circuit to increase conversional ratio is adopted. Finally, at the conversion end the rectified sinusoidal waveforms is generated. The coupled filter inductors, which are placed in voltage doubler, not only reduce circulating current, which increases efficiency but also make the rectified output sinusoidal waveforms of DC/DC stage as smooth voltage source. In DC/AC stage, the full bridge circuit with line frequency square wave control is adopted to reduce switching losses and control cost. To verify the presented analysis a 100 W prototype single phase 220 VAC 50 Hz inverter output has been constructed and the experimental results are given.

scholarly journals Analysis and Implementation of a Phase-Shift Pulse-Width Modulation Converter with Auxiliary Winding Turns

Energies ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 222
Author(s):  
Bor-Ren Lin
Keyword(s):  
Phase Shift ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Input Voltage ◽  
Power Converter ◽  
Railway Vehicle ◽  
Voltage Range ◽  
Voltage Variation ◽  
Power Switches ◽  
Output Side

A phase-shift pulse-width modulation converter is studied and investigated for railway vehicle or solar cell power converter applications with wide voltage operation. For railway vehicle applications, input voltage range of dc converters is requested to have 30–40% voltage variation of the nominal input voltage. The nominal input voltages of dc converters on railway vehicles applications may be 37.5 V, 48 V, 72 V, 96 V and 110 V. Therefore, a new dc converter with wide input voltage operation from 25 to 150 V is presented to withstand different nominal input voltage levels such as 37.5–110 V on railway power units. To realize wide input voltage operation, an auxiliary switch and auxiliary transformer windings are used on output side of conventional full-bridge converter to have different voltage gains under different input voltage values. Phase-shift pulse-width modulation is adopted in the developed dc converter to accomplish soft switching operation on power switches. To confirm and validate the practicability of the presented converter, experiments based on a 300 W prototype were provided in this paper.

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