Electric motor drives Research Papers (original) (raw)

2025

This paper discusses two observers, which are used for the estimation of parameters of PMSM. Former one, reduced order observer, which is used to estimate the inaccessible parameters of PMSM. Later one, full order observer, which is used to estimate all the parameters of PMSM even though some of the parameters are directly available for measurement, so as to meet with the insensitivity to the parameter variation. However, the state space model contains some nonlinear terms i.e. the product of different state variables. The asymptotic state observer, which approximately reconstructs the state vector for linear systems without uncertainties, was presented by Luenberger. In this work, a modified form of such an observer is used by including a non-linear term involving the speed. So, both the observers are designed in the framework of nonlinear control; their stability and rate of convergence is discussed.

2025, International Journal of Power Electronics and Drive Systems (IJPEDS)

This paper proposes a neural network control voltage tracking scheme of a DC-DC Flyback converter. In this technique, a back propagation learning algorithm is employed. The controller is designed to improve performance of the Flyback converter during transient and steady state operations. Furthermore, to investigate the effectiveness of the proposed controller, some operations such as starting-up and reference voltage variations are verified. The numerical simulation results show that the proposed controller has a better performance compare to the conventional PI-Controller method.

2025, International Journal of Advanced Natural Sciences and Engineering Researches

Novel Al-based soft computing applications are vital tools that have greatly upgraded the performance of electrical rotating machines both in design and control. The optimal performance of motors and electric vehicles greatly pends on soft computing techniques advancement in electrical rotating machines. This work presents the view of soft computing techniques and their various applications, most recent of the techniques are reviewed to give a deep inside for further design and control of motor drives.

2025

Dedico este trabalho à minha esposa, Socorro Chaves, pelo carinho, paciência e incentivo para a realização deste trabalho e ao meu filho João Marcelo, pela dedicação e a compreensão da necessidade de mudanças constantes de cidades e escolas para nos acompanhar. Aos meus familiares e em especial à minha irmã Shirley Chaves. zyxwvutsrqponmlkjihgfedcbaZ iii Agradecimentos Agradeço aos professores Cursino Brandão Jacobina e Antonio Marcus Nogueira Lima pelas suas valiosas orientações e prontas disponibilidades, sem as quais não seria possível a conclusão deste trabalho. Ao professor Edison Roberto Cabral da Silva pela motivação e colaboração nos experimentos desenvolvidos no LEIAM -Laboratório de Eletrônica Industrial e Acionameto de.Máquinas. Ao meu amigo Reginaldo Corteletti pelo incentivo profissional e pessoal. A todos os integrantes do LEIAM com os quais pude contar com suas experiências e conhecimentos em implementação digital as quais foram fundamentais para a realização deste trabalho. A Universidade do Amazonas pela confiança e apoio à minha capacitação como docente. Ao CAPES/PICD pelo suporte financeiro do trabalho. zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQ iv Este trabalho tem por objetivo apresentar contribuições ao estudo de estimação de parâmetros e de detecção de falta incipiente da máquina assíncrona. A partir do modelo dinâmico da máquina, desenvolvem-se modelos de estimação baseados somente nas medições das correntes e tensões estatóricas. Inicialmente, é proposta uma técnica para a estimação em tempo real da resistência estatórica da máquina baseado na aplicação de sinais homopolares de tensão. O modelo proposto é analisado via simulação e experimentalmente. Em seguida, é proposta uma forma de onda de tensão que permite estimar todos os parâmetros da máquina sem auxilio de dispositivos mecânicos. O modelo é avaliado através de resultados experimentais. São ainda desenvolvidos modelos para máquina de assíncrona operando com faltas incipientes. Finalmente, é proposta uma técnica para detecção em tempo real de falta entre espiras no estator do motor assíncrono trifásico.

2025, Revista Tecnologia

Este trabalho apresenta a utilização da modelagem no domínio do tempo da máquina de indução trifásica, considerando os modelos ABC e em coordenadas dq0, para simulação da máquina de indução na condição de partida direta, degrau de conjugado e perda brusca de carga. Está mostrado também o equacionamento dos modelos, resultado das simulações, e comprovação experimental. Para tanto foram realizados ensaios em um MIT para a entrada e saída brusca de carga. Foram desenvolvidos programas no ambiente Matlab, para a simulação, e validação dos resultados experimentais. Uma comparação no desempenho e tempo de processamento entre os dois modelos, mostrou que o modelo ABC é mais lento que o modelo em coordenadas dq0.

2025, HAL (Le Centre pour la Communication Scientifique Directe)

Several recent techniques from hybrid and optimal control are evaluated on a power electronics benchmark problem. The benchmark involves a number of practically interesting operating scenarios for a fixed-frequency synchronous step-down dc-dc converter. The specifications are defined such that good performance only can be obtained if the switched and nonlinear nature of the problem is respected during the design phase.

2025

Nos motores sem mancais ou motores-mancais as funcoes de motor e mancal sao combinadas, isto e, no estator da maquina circulam correntes que produzem sobre o rotor, alem do torque, tambem forcas radiais que sustentam o rotor no centro do estator. Assim, estas maquinas nao sofrem o desgaste comum dos rolamentos mecânicos, nao requerem lubrificacao, apresentam operacao sem ruido e sao adequadas para aplicacoes com alta velocidade rotacional. Apesar de todas as vantagens dos motores-mancais, o funcionamento destes requer uma estrutura de acionamento dotada de muitos componentes como: chaves eletronicas de potencia, sensores, interfaces eletronicas e processadores digitais de sinais que encarece sua aplicacao. A proposta deste trabalho e otimizar (diminuir) a quantidade de componentes necessarios para o funcionamento do motor-mancal, tanto para o controle da posicao radial do rotor quanto para o seu acionamento. Para conseguir isso foi idealizada a seguinte estrategia: ao inves de contr...

2025

Induction machines have been used in a wide range of applications due to its robustness and its low price. These characteristics make the induction machine a suitable option for industrial and home environments especially for those applications where the required speed is constant and the load does not change drastically. As an alternative to the induction machine, the synchronous machine, particularly the Permanent Magnet machine has been used as well in a wide range of applications, as it is the case with electrical traction systems for different vehicles. But the recent increase in the price of magnets and the difficulty to find a reliable source for massive production, have become an important reason to try to move the market to magnet-free alternatives, such as reluctance and induction machines. However, controlling an induction machine has been a difficult task since its invention, especially during highly dynamic regimes, where the required torque/speed changes constantly. In...

2025

Matthew is a senior Mechanical Engineering student at The Cooper Union who is heavily involved in the Formula SAE team. During the past four years his roles have included the team's Chief Engineer and most recently the lead of the Vehicle Dynamics system, overseeing the vehicle's suspension, steering, and brakes. Amanda is a senior mechanical engineering student at the Cooper Union. She officially joined the Formula SAE team's body and branding systems in Fall 2018, but has also unofficially been involved in helping the team with rapid prototyping for several years. I am a current senior Mechanical Engineering student at The Cooper Union for the Advancement of Science and Art. Throughout my four years as an undergraduate student, I have been an avid member of the Formula SAE team, working on various vehicle subsystems. For the past two years, I have been in charge of the frame subsystem.

2025, IEEE Latin America Transactions

This paper presents the analysis and mathematical modeling of the synchronous reluctance motor, with the state equations and the results obtained for a 4 pole motor (2 hp). Framework based in direct and quadrature axes is used to observe the rotor behavior and to obtain transient and steady state profile of electromagnetic torque. Simulation results also include stator voltage and current.

2025, viXra

The advancement of power electronics has driven the need for materials with superior electrical properties, leading to the use of wide band gap (WBG) semiconductors such as Silicon Carbide (SiC) and Gallium Nitride (GaN). These materials exhibit higher breakdown voltages, faster switching frequencies, and better thermal stability compared to conventional siliconbased devices [1], [2], [3]. However, these benefits introduce significant challenges in electromagnetic noise (EM noise) management, particularly due to rapid transitions characterized by high rates of change in voltage (dV /dt) and current (dI/dt) [4], [5]. This paper analytically investigates the sources and propagation of EM noise in high-frequency switching power modules using WBG semiconductors. Mathematical models are derived to describe the noise generated, incorporating factors such as parasitic inductances (L) and capacitances (C), frequency-dependent impedance (Z(f)), and noise power density (N (f)) [6]. The relationships between switching characteristics and noise amplitude are explored through differential equations and Fourier analysis to map timedomain signals to their frequency components. Solutions for noise suppression are proposed, involving optimized circuit design and theoretical applications of electromagnetic wave propagation (EWP) principles, such as wave reflection and transmission in multi-layer structures [7], [8]. This work bridges theoretical electromagnetics with practical power module design, offering strategies that align with electromagnetic compatibility (EMC) standards and enhance performance.

2025

O objetivo desta dissertação é o estudo do projeto de um controlador de tração para um veículo elétrico. Pelas suas características de eficiência e densidade de potência que o tornam ideal para ser usado em veículos elétricos, o motor síncrono de ímanes permanentes foi a máquina escolhida para a tração. O documento apresenta o estado da arte da tecnologia que envolve os veículos elétricos, mais particularmente dos conversores de potência e dos métodos de controlo do motor. Após ser analisado o modelo dinâmico do motor, é implementado o DTC-SVM como estratégica de controlo do mesmo, de entre as várias aqui revistas. O sistema é validado por meio de simulação e os resultados mostram que é alcançada uma boa dinâmica de binário, ao mesmo tempo que se consegue um baixo ripple.

2024

pela confiança em mim depositada, me orientando nesta dissertação de mestrado. Ao Prof. Dr. Eng. Moisés de Mattos Dias, pelo auxilio nas dúvidas ao longo deste período, além do incentivo durante as pesquisas. Aos colegas do GDER, André Carvalho Tavares, Diego Pacheco Wermuth, Felipe Guimarães Ramos, Franciele Peruchi, Franciele Weschenfelder e Monir Göethel Borba pelo apoio durante todo o desenvolvimento do trabalho. Aos colegas Alex Fabiano Bueno e Wilson Correa Rodrigues pelo incentivo para realizar esta dissertação. A todos que colaboraram de alguma forma, os meus sinceros agradecimentos.

2024, IEEE Transactions on Transportation Electrification

Wide bandgap (WBG) device-based power electronics converters are more efficient and lightweight than Silicon-based converters. WBG devices are an enabling technology for many motor drive applications and new classes of compact and efficient motors. This paper reviews the potential applications and advances enabled by WBG devices in ac motor drives. Industrial motor drive products using WBG devices are reviewed and the benefits are highlighted. This paper also discusses the technical challenges, converter design considerations and design trade-offs in realizing the full potential of WBG devices in motor drives. There is a trade-off between high switching frequency and other issues such as high dv/dt and electromagnetic interference. The problems of high common mode currents and bearing and insulation damage, which are caused by high dv/dt, and the reliability of WBG devices are discussed.

2024

Tato diplomová práce se zabývá strategiemi řízení, které jsou dostupné pro bezkartáčové DC motory, a které mohou být použity pro řízení rychlosti pohonů elektrických vozidel. Úkolem práce je studium rozličných řídicích algoritmů, nalezení způsobů, jak optimalizovat jejich výkon, a zároveň simulovat jejich chování pro ověření jejich vlastností. Závěrečná etapa práce spočívá v přípravě implementovatelného řídicího algoritmu, který je poté spuštěn na laboratorním stanovišti s aktivním řídicím systémem založeným na zpětné vazbě PID regulátoru a uživatelského rozhraní (HMI) pro snadnou interakci v průběhu testu.Master's Thesis researching the various control strategies available for BLDC motor control that can then be employed in the speed control of electric vehicle drive systems. The task involved studying the various control algorithms, finding ways to optimize their performance and simulate them as a proof of concept. The final stage of the thesis involved the preparation of an i...

2024

At the July 2008 G8 summit in Toyako Hokkaido, the greatest challenge discussed was global warming. Dire circumstances require recognition of the seriousness of this issue. In its own business-related activities, Fuji Electric addresses environmental issues by promoting built-in environmental management, aiming “to create efficiency without waste using few natural resources and with low energy consumption” to further advance core technologies cultivated over many years and to make continuous improvements(1). Power electronics technology, which enables the efficient utilization of electrical power and energy, is positioned a major technology for protecting the global environment and reducing CO2 emissions. In particular, power semiconductor devices, the key components that support power electronics technology, are expected to become increasingly important. Environmental friendliness and ease of use are recently being requested of power semiconductors. Of course, components and materi...

2024, IEEE Transactions on Industrial Electronics

Low-order odd current harmonics arise in practical multiphase drives due to machine and converter nonlinear behavior (e.g., deadtime and flux saturation). If the windings are distributed, some harmonics cause torque ripple, while others produce losses. The latter is aggravated by the small impedance in the no-torque subspaces. Current harmonics can be compensated without steady-state error by proportional-integral controllers in multiple synchronous frames (SFs); however, a heavy computational load is required. In three-phase systems, the computational burden of this multiple SF (MSF) scheme is often avoided by implementing instead resonant controllers (RCs) tuned at the harmonics that are multiples of six in an SF rotating with the fundamental frequency. A similar structure has been proposed for nonlinearities compensation in asymmetrical sixphase machines. This paper extends this multiple RC (MRC) strategy to symmetrical machines of any phase number. The optimum frequencies for the RCs and for the SF in each plane, so that the number of RCs is minimized, are established. Then, the computational load of the resulting generic MRC scheme is assessed and compared with that of the MSF structure. The conditions in which the former is particularly preferable over the latter are identified. Experimental results are provided. Index Terms-Current control, digital control, machine control, motor drives, multiphase ac drives, variable speed drives. NOMENCLATURE Variables and transfer functions G PI p (z) Proportional-integral controller in plane p. G res p,q (z) Resonant controller (RC) with resonant frequencies ±h res p,q ω f placed in a synchronous frame (SF) that rotates with frequency h sf p ω f in plane p. h ∈ Z Index that indicates the order of a harmonic of ω f that is mapped in any of the n subspaces. The sign of its value indicates positive or negative sequence. h p,0 ∈ Z Lowest [in absolute value (ABV)] odd harmonic order in plane p. h ± p,q ∈ Z Positive-(+) or negative-sequence (−) odd harmonic order in plane p referred by q.

2024

Capítulo 4-Modelagem da Máquina de Indução sem Mancais 4.1-Introdução 4.2-Correntes da Máquina 4.3-Equações de Fluxo 4.4-Equações de Tensão 4.5-Equações de Torque 4.6-Modelo da máquina 4.6.1-Torque 4.6.2-Cálculo de imR 4.7-Modelo da Posição Radial 4.7.1-Modelo da Posição em um Eixo 4.7.2-Modelo da Posição em três Eixos 4.7.3-Modelo da Posição em Sistema Bifásico 4.8-Diagrama de Blocos Geral 4.9-Conclusão

2024, 2016 IEEE Energy Conversion Congress and Exposition (ECCE)

Multiphase machines (MPMs) have become serious contenders in several applications, such as offshore wind energy and electric vehicles. Low-order current harmonics arise in actual drives due to converter and machine nonlinearities, thus producing losses and torque ripple. In comparison to three-phase machines, in MPMs this effect is aggravated because of the existence of low-impedance subspaces. To cancel these harmonics, a multiple resonant controller (RC) (MRC) structure has recently been proposed for MPMs, which combines RCs and synchronous frames (SFs). The MRC scheme allows a significant computational saving in comparison to the multiple SF (MSF) strategy, which includes a proportional-integral controller in an SF per each harmonic. However, such MRC method is only suitable for MPMs with symmetrical winding arrangement (SWA), while asymmetrical winding arrangement (AWA) is also a common choice. In this paper, the MRC strategy is extended to MPMs with AWA. Different neutral configurations, whose effect on the harmonic mapping is more complicated than for SWAs and has hardly been studied so far, are considered. The optimum combinations of frequencies at which the RCs and the SFs should be tuned for AWAs are assessed. Simulation results are provided.

2024, IEEE Transactions on Power Electronics

Multiphase drives offer important advantages over three-phase ones; e.g., lower per-phase rating and enhanced fault tolerance. For multiphase machines, multifrequency current control (MCC) is often required, e.g., for harmonic cancellation or injection. In certain situations, converter output voltage (OV) saturation occurs, which can cause windup and additional OV distortion. For MCC, obtaining antiwindup and distortion-free OV saturation, with full dc-bus exploitation, entails extra complexity. Recent publications address this problem in three-phase and dual three-phase (treated as two independent three-phase) systems with one and two isolated neutrals, respectively. However, extending such solutions to drives of any phase number n, winding arrangement (symmetrical or asymmetrical) and neutral configuration is not straightforward. This paper proposes a general MCC scheme, including antiwindup and distortion-free OV saturation with full dc-link utilization, for n-phase machines with different winding arrangements (symmetrical or asymmetrical) and neutral configurations. The computational burden required by the proposed antiwindup and saturation strategy is studied; it is concluded that, although it is significant in comparison with the resources needed by the rest of the MCC, the total computational load is acceptable in most cases. Experimental results with two multiphase machines are provided, including a comparison with other approaches.

2024, IEEE Transactions on Power Electronics

Dual three-phase machines (D3PMs) are particularly attractive due to their fault-tolerance capability. In general, under open-phase (OP) faults, the current references are adapted following a minimum-loss strategy (MLS) or a maximum-torque strategy (MTS). The MLS offers lower copper loss than the MTS for any given torque, but a smaller torque operation range. The full-range MLS (FRMLS) has recently been proposed, providing minimum copper loss, for each torque value, in the whole torque operation range (the MTS torque operation range); however, only one OP was considered. Furthermore, neither the torque operation range of the MLS nor the copper loss of the MLS or MTS have been assessed with two OPs. Consequently, it is difficult to infer a priori the relevance that the FRLMS may have for two OPs. This letter evaluates the extension of the FRMLS to D3PMs with two OPs. First, the procedure to carry out this extension is described. Then, the convenience of the FRMLS for two OPs is studied for different situations. It is concluded that for two OPs in most cases the FRMLS is substantially better than the MTS and MLS in terms of copper loss and torque operation range. Experimental results verify the theory. Index Terms-Dual three-phase machine (D3PM), fault tolerant control, multiphase drives, variable speed drives. ACRONYMS D3PM Dual three-phase machine. FRMLS Full-range minimum-loss strategy. OP Open phase. MTS Maximum-torque strategy. MLS Minimum-loss strategy I. INTRODUCTION D UAL three-phase machines (D3PMs), a.k.a. asymmetrical six-phase machines, are an attractive alternative to three-Manuscript

2024, 4th Int. Conf: on Electrical and Electronics …

A hybrid filter constructed of a shunt active filter and distributed passive filters used for power quality improvement in PV power generating systems is presented. The distribution system consists of a photovoltaic power generation... more

2024, World Journal of Advanced Research and Reviews

This paper addresses the challenge of torque ripple in Permanent Magnet Synchronous Motors (PMSMs) through the implementation of a Proportional-Integral (PI)-based Direct Torque Control (DTC) strategy. Torque ripple, a phenomenon affecting motor performance, is mitigated by leveraging the simplicity and fast response of DTC, augmented by the precision of PI controllers. The objectives encompass a comprehensive understanding of PMSM characteristics, the design and implementation of the PI-based DTC system in MATLAB Simulink, and an in-depth analysis of its performance in torque ripple reduction. The paper also involves comparative studies with traditional control methods, parameter tuning for optimization, and assessments of versatility under varying conditions. By achieving these objectives, the research contributes to the advancement of control strategies for PMSMs, enhancing their efficiency and adaptability in industrial applications. The outcomes are documented and presented, providing valuable insights for future advancements in electric motor control.

2024, World Journal of Advanced Research and Reviews

2024, TELKOMNIKA Telecommunication Computing Electronics and Control

This work offers the sliding mode control (SMC) based control scheme for a railway traction transmission system fed by a five-level T-type inverter. This nonlinear control approach is created for the speed and torque loop control of the permanent magnet synchronous motor (PMSM) railway traction drive system supplied by a multi-level inverter. The article also includes a mathematical model of a PMSM motor and torque load to design controllers. The paper expressed the vector voltage modulation design incorporating a five-level T-Type inverter. The research proposes a control scheme for the railway traction drive system that enhances transmission quality by lowering the torque ripper and stator current harmonic distortion and extending converter life. Through MATLAB simulation, the study findings are validated.

2024

Neste trabalho sao apresentadas as bases metodologicas para o modelamento e um primeiro enfoque para o controle vetorial do Motor de Inducao Trifasico (MIT) segundo a tecnica IUFO (Indirect Universal Field Oriented) orientada pela componente de eixo direto do fluxo rotorico. Para isso e necessaria a elaboracao de um modelo computacional (utilizando aqui os softwares Matlab e Simulink como ferramentas de simulacao) do motor a ser simulado que seja baseado acoplamento eletromagnetico entre estator e rotor (fluxo) e, posteriormente a aplicacao das tecnicas de controle sobre esse modelo. Sendo o motor uma parte tao vital do atual sistema eletrico, a intencao deste trabalho e mostrar como simula-lo de forma fiel e introduzir um controle que permita manipular Torque e Velocidade de forma eficiente. Os resultados obtidos mostram a importância de um modelamento matematico bem estruturado e simulado de maneira correta.

2024, IEEE Transactions on Power Electronics

This paper presents an improved direct torque control (DTC) method for an asymmetrical six-phase induction motor using a two-level six-phase inverter. As is well-known, a simple extension of three-phase direct torque control technique to an asymmetrical six-phase motor, using large vectors only, introduces significant current harmonics of the order 6n±1 (n = 1,3,5,…), which are mapped into the non-flux/torque producing (xy) plane. These harmonics cause only losses in the motor winding as they do not take part in torque production. Hence a number of different improved DTC techniques have been developed in the past for multiphase motor drives. The paper takes one such DTC method as the starting point and improves it further by using the concept of virtual voltage vectors. Developed vector selection algorithm, based on two virtual voltage vectors, requires the information on position of the flux in the auxiliary (xy) subspace and provides stator current quality commensurate with the currently available best DTC algorithm for six-phase drives. However, use of two virtual voltage vectors enables a substantial reduction of the torque ripple, which is achieved by means of a five-level torque comparator. Extensive experimentation is performed and it is shown that the reduction of the current harmonics is in essence almost the same as in another recently developed DTC scheme, based on the use of a single virtual voltage vector. However, the achieved torque ripple reduction, which is verified experimentally, makes the scheme superior when compared to the existing approaches. At the same time, developed scheme retains qualities of conventional DTC schemes, such as simple structure and fast response. Its additional beneficial feature is the easiness of implementation.

2024, Blucher Engineering Proceedings

With the current growth of the vehicular electrification market, the use of electric machines has become more common. Several components of the machine influence the performance of it, so the knowledge of specific aspects can improve the development process. The magnetic flux density is an important parameter in the performance of the machine, so methods to understand its behavior become necessary. This work presents a measurement system based on a Hall effects sensor, which is used in the measurement of the magnetic field of the rotor of a vehicular alternator. The results of the measurements are compared with the computational simulation, as result is observed a good correlation between the proposed method and the theoretical model presented.

2024, IEEE Power Electronics Magazine

2024, The European Physical Journal Applied Physics

In this work, we present an algorithm for the space vector pulse width modulation (SVPWM) applied to five-level diode clamped inverter. In this algorithm, the space vector diagram of the five-level inverter is decomposed into six space vector diagrams of three-level inverters. In turn, each of these six space vector diagrams of three-level inverter is decomposed into six space vector diagrams of two-level inverters. This idea allows us to generalize the two-level SVPWM algorithm into the case of five-level inverter.

2024

The Formula SAE Electric competition is a collegiate autocross event in which teams design, build, and race an open-wheeled electric race car. The main motivation is the efficiency advantage of electric motors over internal combustion motors. This thesis presents the design and evaluation of two generations of Portland State University electric race cars. The constraints are the competition rules, finances, human resources, and time required to complete a race car in one year. The design includes the implementation of existing components: battery cells, controllers, electric motors, drivetrains, and tire data for an optimized race car. Also, several circuits were designed and built to meet the rules, including the shutdown, precharge, discharge, brake system plausibility, tractive system active light, Gratitude is extended to Portland State University. Thank you to the thesis committee:

2024

This paper analyzes the dynamio performance of permanent magnet (PM) f%mchronous motors using damping and synchronizing torques. A numerical algorithm has been applied to obtain these torque components using a time-domain analysis off nonlinear systems. The effects of all electrical parameters have been examined and the optimum values which give maximum internal damping are defined. It has also beed demonstrated that the choice of the optimum values of these parameters results in well damped oscillations with improved dynamical performance following load changes.

2024, International Journal of Power Electronics and Drive Systems (IJPEDS)

The paper describes field oriented control strategy with space vector pulse width modulation technique of permanent magnet synchronous motor drive system for an electric vehicle. At first, mathematical models of the motor and the drive system for electric vehicle are presented. In order to obtain high performance drive and maximum motor torque, field oriented control strategy and space vector pulse width modulation technique method are applied to drive system in next section. Speed controller design utilizing the popular zero-pole elimination approach causes large integral constant time in case of small rotational damping constant. The desired-transient-response-based approach is employed to overcome the problem. Performance indices include overshoot, undershoot, steady-state speed error, and total harmonic distortion of stator current, are employed to assess the drive systems with two speed controller design methods. Theoretical assumptions are confirmed via simulations and criter...

2024, Energies

This paper introduces a novel approach to speed-sensorless predictive torque control (PTC) in an autonomous wind energy conversion system, specifically utilizing an asymmetric double star induction generator (ADSIG). To achieve accurate estimation of non-linear quantities, the Gaussian Process Regression algorithm (GPR) is employed as a powerful machine learning tool for designing speed and flux estimators. To enhance the capabilities of the GPR, two improvements were implemented, (a) hyperparametric optimization through the Bayesian optimization (BO) algorithm and (b) curation of the input vector using the gray box concept, leveraging our existing knowledge of the ADSIG. Simulation results have demonstrated that the proposed GPR-PTC would remain robust and unaffected by the absence of a speed sensor, maintaining performance even under varying magnetizing inductance. This enables a reliable and cost-effective control solution.

2024

In this paper, two methods for controlling saturated slip power recovery drives (SSPRD) are studied and compared. To account for saturation, a polynomial approximation is used for the proper account of the nonlinear magnetization reactance. Fuzzy logic (FL) is then proposed for intelligent control of the saturated slip power recovery drive.The characteristics of the FL controlled SSPRD during start up is presented. The FL controlled system responses to step changes in the reference speed , load torque, and parameters variation are presented. A comparison between the responses of a PI controlled SSPRD and the FL controlled SSPRD to variations in reference speed, in load torque, and in rotor resistance, is obtained. Results proved that the FL controlled SSPRD attains faster responses, accurate speed tracking, higher load disturbance rejection, and lower sensitivity to parameters variation', than the PI controlled SSPRD.

2024

This paper considers a model predictive controller with reference tracking that manipulates the integer switch positions of a power converter. It can be shown that the optimal switch position can be computed without solving an optimization problem. Specifically, in a new coordinate system, the optimization problem can be solved offline, leading to a polyhedral partition of the solution space. The optimal switch position can then be found using a binary search tree. This concept is exemplified for a three-level single-phase converter with an RL load.

2024, 2016 IEEE 17th Workshop on Control and Modeling for Power Electronics (COMPEL)

2024, Archives of Electrical Engineering

The paper presents an identification procedure of electromagnetic parameters for an induction motor equivalent circuit including rotor deep bar effect. The presented procedure employs information obtained from measurement realised under the load curve test, described in the standard PN-EN 60034-28: 2013. In the article, the selected impedance frequency characteristics of the tested induction machines derived from measurement have been compared with the corresponding characteristics calculated with the use of the adopted equivalent circuit with electromagnetic parameters determined according to the presented procedure. Furthermore, the characteristics computed on the basis of the classical machine T-type equivalent circuit, whose electromagnetic parameters had been identified in line with the chosen methodologies reported in the standards PN-EN 60034-28: 2013 and IEEE Std 112TM-2004, have been included in the comparative analysis as well. Additional verification of correctness of identified electromagnetic parameters has been realised through comparison of the steady-state power factor-slip and torque-slip characteristics determined experimentally and through the machine operation simulations carried out with the use of the considered equivalent circuits. The studies concerning induction motors with two types of rotor construction-a conventional single cage rotor and a solid rotor manufactured from magnetic material-have been presented in the paper.

2024, The European Physical Journal Applied Physics

2024, 2016 Eleventh International Conference on Ecological Vehicles and Renewable Energies (EVER)

The dynamic testing method (DTM) has been shown to accurately characterize the electromagnetic model of permanent magnet synchronous machines by describing the relationship between the phase currents and the linked magnetic flux with minimal amount of test equipment as compared with traditional methods. Within this paper, a performance evaluation of the DTM applied to a synchronous reluctance machine is presented. This paper discusses the challenges of a dynamic test of a nonlinear synchronous machine and suggests a fuzzy proportional, derivative and integral controller (PD + I) controller for improved control performance and measurements. Finally, the DTM measurements are compared with the results of the constant speed method (CSM). The CSM measurements of flux linkage and torque curves confirm the validity of the DTM measurements for this machine.

2024

Highly efficient and fast power switches have been demonstrated with GaN HEMT on SiC. With such devices, it is possible to increase the switching rate of a half bridge synchronous buck converter and therefore decrease the value of the inductance of the output filter. However a higher switching frequency increases the sensitivity of the gate driver connection to the switches. This paper reports two fully integrated buck converters with their gate drivers, using Wolfspeed enhanced/depleted mode GaN on SiC process. With a switching frequency of 10MHz, output powers from 10W to 30W have been delivered with a switcher efficiency ranging from 90% to 95%, and an overall efficiency of 87% to 95%, under an input voltage of 28V. The size of the circuits is less than 5.2mm 2 .

2024, International Journal of Power Electronics and Drive Systems (IJPEDS)

Generally, Electronic Load Control (ELC) used in micro hydro power plant (MHPP) to controls the voltage between consumer load and a dummy load, still detects one parameter voltage or frequency generator only. Whereas in reality, any changes in the load on consumers, generator voltage and frequency also changed. When the consumer load down the electric current will be supplied to the dummy load, amounting to decrease in consumer load. When there is a transfer load, there will be distortion voltage and frequency, thus a special methods to reduce distortions by speeding up the process of transferring the electric load is needed. The proposed of this study is using fuzzy logic algorithm.To realize such a system, a comparison tool model of load control digital electronic fuzzy logic controller (FLC) and Proportional Integrator (PI) is required. This modeling using matlab program to simulate, the simulation result shows that the ELC based on fuzzy logic controller is better than conventi...

2024, International Journal for Research in Applied Science and Engineering Technology

Multiphase motors are induction motors in which stator has more than three phases. These motor drives (more than three phases) have attracted more attention in recent automation as they possess several advantages over conventional threephase drives such as lower space-harmonic content, can operate even during phase open fault, higher torque density, and higher efficiency. For applications operating with electric cars, multiphase system could satisfy potential demand for electric drive systems of power, which are both robust and energy efficient. This paper presents dynamic modeling of five-phase induction motor drive, also simulation results of a five phase induction machine supplied from a five phase inverter.

2024

A parallel arrangement of a Silicon (Si) IGBT and a Silicon Carbide (SiC) MOSFET is experimentally demonstrated. The concept referred to as the Cross Switch “XS” hybrid aims to reach optimum power device performance by providing low static and dynamic losses while improving the overall electrical and thermal properties due to the combination of both the bipolar Si IGBT and unipolar SiC MOSFET characteristics. For the purpose of demonstrating the XS hybrid, the parallel configuration was implemented experimentally in a single package for devices rated at 1200V. Test results were obtained to validate this approach with respect to the static and dynamic performance when compared to a full Si IGBT and a full SiC MOSFET reference devices having the same power ratings as for the XS hybrid samples. Furthermore, an advanced Bimode Cross Switch Hybrid (BXS) is also demonstrated for 3300V devices by combining a Si RC-IGBT or BIGT with SiC MOSFETs. The BXS provides both Switch and diode mode o...

2024, Spring

In response to the growing demand for fast-charging electric vehicles (EVs), this study presents a novel hybrid multimodule DC-DC converter based on the dual-active bridge (DAB) topology. The converter comprises eight modules divided into two groups: four Insulated-Gate Bipolar Transistor (IGBT) modules and four Metal-Semiconductor Field-Effect Transistor (MESFET) modules. The former handles high power with a low switching frequency, while the latter caters to lower power with a high switching frequency. This configuration leverages the strengths of both types of semiconductors, enhancing the converter's power efficiency and density. To investigate the converter's performance, a small-signal model is developed, alongside a control strategy to ensure uniform power sharing among the modules. The model is evaluated through simulation using MATLAB, which confirms the uniformity of the charging current provided to EV batteries. The results show an impressive power efficiency of 99.25% and a power density of 10.99 kW/L, achieved through the utilization of fastswitching MESFETs and the DAB topology. This research suggests that the hybrid multimodule DC-DC converter is a promising solution for fast-charging EVs, providing high efficiency, power density, and switching speed. Future studies could explore the incorporation of advanced wide bandgap devices to handle even larger power fractions.

2024

1. Introdução Por ser uma máquina robusta e de baixo custo de produção, o motor assíncrono ou de indução é dos mais utilizados na indústria. Uma grande fatia da energia elétrica consumida anualmente em qualquer país desenvolvido deve-se à utilização de motores elétricos. Estima-se que cerca de 70% da energia consumida no setor industrial e cerca de 30% da energia elétrica consumida no setor do comércio e serviços se deva a este tipo de cargas1. No motor de indução, o campo magnético girante produzido no estátor induz f.e.m. nos condutores do rótor. Uma vez que estes estão em curto-circuito, vão circular correntes que, por sua vez, criam o campo magnético do rótor. Este campo do rótor vai interagir com o campo magnético do estátor dando origem a um binário que será aplicado a uma carga mecânica para produzir trabalho.

2024

Agradeço ao meu orientador, o prof. Dr. Jean Vianei Leite por todo o apoio, conhecimento, convívio nestes anos, pelo tempo dedicado e conhecimento repassado, servindo sempre como incentivador e facilitador. Aos professores presentes na banca pela disponibilidade, atenção e contribuição. Agradeço ao GRUCAD (Grupo de Análise e Concepção de Dispositivos Eletromagnéticos) aos professores do grupo, especialmente ao professores Dr. João P. A. Bastos, Dr. Nelson Sadowski e Dr. Maurício V. F. da Luz pelo convívio no laboratório, conhecimentos técnicos repassados, oportunidade e conversas informais. Agradeço a Celly Mello, Wilson Silva Costa e Marcelo Siqueira pelo pronto atendimento, sempre que solicitados. Ao CNPQ pelo suporte financeiro oferecido como apoio para o desenvolvimento desta dissertação. À Flessak Eletroindustrial e a Unisep pelo apoio na conclusão desse trabalho. Aos colegas de trabalho da UFSC, em especial aos integrantes do LABSPOT, pelo companheirismo das conversas e também pelo fornecimento do café de cada dia. Aos meus grandes amigos Angelo Hafner, Kleyton Hoffmann, Sigmar de Lima, Sandro Lima, Thiago Bazzo, José Kölzer e demais colegas do grupo pelas intermináveis discussões, não somente de cunho técnico, e pelo apoio em todos os momentos bons e ruins desta jornada. Aos meus amigos e companheiros de residência, Bruno Gris e Humberto Alencar, engenheiros por paixão, respectivamente, músico e atleta por vocação, pelas conversas, discussões, tererês, churrascos, passeios e apoio. Serão sempre uma feliz parte de minhas lembranças. Aos meus pais Ana e Helio, que me proporcionaram todo apoio, carinho, amor, incentivando-me e elucidando sobre a importância da integridade e da perseverança diante das situações enfrentadas na vida. Por isso minha imensurável gratidão a vocês. Agradeço a minha esposa Juliana por igual apoio, amor e paciência nesses anos de distância. Sempre me incentivando e me inspirando a ser melhor, tanto pessoal quanto profissionalmente. A Deus. Nenhum homem torna-se verdadeiramente tolo até que ele pare de fazer perguntas. (Charles P. Steinmetz) Palavras-chave: Motor de indução. Modelo analítico. Modelo por fase. Parâmetros concentrados.