Phase Induction Machine Research Articles

Analysis of 3-phase Induction Motor considering Current Regulator using DQ Transformation with Matrix Vector

3-phase Induction machines are being used in industry and dq transformation from 3 phase of a, b, c is commonly used to analyze these machines. The equivalent circuits of d and q axis are however generally cross coupled and not simple to analyze. In this study, an analysis method of 3ph induction motor considering current regulator using dq transformation and matrix vector is proposed and it can explain the 3ph induction motor physically. This model does not need the separating process of d and q components. With this technique, the model becomes simple, is easy to understand in physical, and can get the same results with those from the other dq models. These simulation results of the proposed model are compared with those of other models for the conformation of the proposed method.

High Performances of Five–Phase Induction Machine Feeding by A [3 × 5] Matrix Converter

Abstract In this paper, we study an analytic technique to control matrix converter for a four-quadrant five-phase induction machine drive with use PWM five intervals modulation strategy. The multiphase induction machine is feeding by a matrix converter using a three-phase network. Special emphasis is given to the sinusoidal five phase voltage in the output and five phase voltage input current modulation. Simulation results are presented.

ANALYSIS AND CONTROL OF HARMONICS OF THREE PHASE INDUCTION MACHINE BY SPACE VECTOR DECOMPOSITION USING MATLAB SIMULATION

The technique of vector space decomposition control of three phase induction machine is presented in this paper. By vector space decomposition the analytical modeling and control of machine are accomplished. The space vector decomposition technique limits the 5th, 7th, 17th, 19th….harmonic currents, which in such a system is otherwise difficult to control. This synopsis present harmonic analysis of motor current of medium and high power Variable Frequency Drive (VFD) Systems. Computer simulation of an IGBT fed induction motor based on constant voltage/frequency (V/f) operation is implemented using simulation software.

Efficiency Optimization of Six-phase Induction Motors by Fuzzy Controller

In this paper efficiency improvement of a Six-phase Induction Machine (6PIM) with fuzzy Anfis method is presented. Six phase induction machine is supplied by SPWM (Sine Pulse Width Modulation). The motor efficiency in low speed or low load conditions (under nominal point) is low. The purpose of this paper is to reduce core losses of six phase induction motor in these conditions. Fuzzy flux search controller is a simple technique and robust against parameter changes that can be easily implemented. Loss minimum point of six phase induction motor is related to stator current, thus by decreasing of current the loss is decreased. Results are presented in the paper to verify the effectiveness of the proposed approach. DOI: http://dx.doi.org/10.5755/j01.eee.19.10.5895

Research on Rotor Field Oriented Control of Dual-Three Phase Induction Machine

In this paper, the mathematical model of dual three-phase induction motor is constructed based on space vector decomposition. The rotor field oriented control of the motor is then proposed. The simulation model of the motor is constructed in Matlab/Simulink/PLECS software. Simulation systems of the start-up transient and the rotor field oriented control of the motor are established. The simulation results validate the model and the effectiveness of the proposed control method.

Monitoring Gear Fault by Using Motor Current Signature Analysis and Fast Kurtogram Method

Conventional methods (i.e. time and frequency analysis) can routinely be used to reveal gear fault-indicating information in the current signal. In recent years, Wavelet analysis, which can lead to a clear identification of the nature of faults, are widely used to describe rotating machine condition. The Capability of this method in the detection of any abnormality can be further improved when its low-order frequency moments are considered. This paper presents the use of the Fast Kurtogram in the early detection and condition monitoring of crack fault. For this purpose, a dynamic model of an electromechanical system which is a simple stage gearbox (with and without gear defect) driven by a three phase induction machine is developed. Then motor stator current is analyzed by using a Fast Kurtogram method. This method is suitable for such diagnosis and gives valuable information about the presence and effects of the crack tooth defect

Multiphase Z-source inverter using maximum constant boost control

Abstract This paper deals with the impedance source (Z-source) multiphase inverter, where the maximum constant boost control method is studied and analyzed in the general case of number of phases. On the other side the impact of the modulation index and the number of phases on the duty cycle shoot-through and on the gain of the output voltage ranges is presented. To validate advantages of the Z-source multiphase inverter, the proposed topology and the maximum constant boost control are implemented in simulation and in real time experimentation with Z-source five phase inverter. The output voltage is applied to two parallel loads, a five phase resistive load and a five phase induction machine.

SLOT DESIGN FOR DYNAMIC IRON LOSS REDUCTION IN INDUCTION MACHINES

The goal of this paper is to present a semi analytical method which makes it possible the calculation of the dynamic iron losses in a three phase induction machine taking the slotting efiect into account. The particularity of this method is that it allows the distinction of the stator and the rotor slot openings contribution in the dynamic and, consequently, in the total iron losses. This analytical study shows that a convenient choice of the stator and the rotor slot openings leads to an iron loss reduction, due to the cancellation of particular ∞ux density slotting harmonics. Theoretical results are conflrmed numerically.

A Novel Method for Multiobjective Design and Optimization of Three Phase Induction Machines

A fast and efficient multiobjective optimization design method is developed for induction machines, which requires much fewer design iterations than the traditional design methods. In this new method, the number of prime variables that define the optimization is reduced to only six. A canonical particle swarm optimization (PSO) method with penalty function for design constraints is developed to find the optimal solution for a user-defined objective function. After several trial solutions with the PSO, the optimal regions for both the design variables and the performance indexes can be estimated. The results will provide useful information for both a drive system designer and a machine designer at an early stage of the design process. A comparison study of PSO and genetic algorithm (GA) is also performed in this paper, and the comparison shows that PSO is more successful in finding the global optima and also has better computational efficiency than GA. The original contributions of this paper are a novel induction machine design method, consideration of winding turn selection limitation, and a machine-design-focused comparison.

Projeto de observadores de fluxo para o controle por orientação direta do campo em máquinas de indução pentafásicas

Apresenta-se neste artigo a aplicação de técnicas de otimização convexa para o projeto de observadores robustos aplicados a motores de indução pentafásicos, sujeitos a variações na resistência do rotor e a perturbações de carga. É desenvolvido um estimador robusto para os fluxos do primeiro e terceiro harmônico do rotor, cuja validação é realizada junto ao controle por orientação de campo no modo direto admitindo aplicações que exijam elevado desempenho dinâmico e alta robustez frente a variações paramétricas e distúrbios externos.

The d-q Modeling, Order Reduction and Numerical Analysis of Double Cage Three Phase Induction Machine for Power System Studies

The d-q Modeling, Order Reduction and Numerical Analysis of Double Cage Three Phase Induction Machine for Power System Studies

Generalized Two Axes Modeling, Order Reduction and Numerical Analysis of Squirrel Cage Induction Machine for Stability Studies

A substantial amount of power system load is made of large number of three phase induction machine. The transient phenomena of these machines play an important role in the behavior of the overall system. Thus, modeling of induction machine is an integral part of some power system transient studies. The analysis takes a detailed form only when its modeling becomes perfect to a greater accuracy. When the stator eddy current path is taken into account, the uniform air-gap theory in phase model analysis becomes inefficient to take care of the transients. This drawback necessitates the introduction of analysis of the machine in d-q axis frame. A widely accepted induction machine model for stability studies is the fifth-order model which considers the electrical transients in both rotor and stator windings and the mechanical transients. In practice, some flux-transient can be ignored due to the quasi-stationary nature of the variables concerned. This philosophy leads to the formation of reduced order model. Model Order Reduction (MOR) encompasses a set of techniques whose goal is to generate reduced order models with lower complexity while ensuring that the I/O response and other characteristics of the original model (such as passivity) are maintained. This paper takes the above matter as a main point of research. The authors use the philosophy of the speed-build up of induction machine to find the speed versus time profile for various load conditions and supply voltage disturbances using numerical methods due to Runge- Kutta, Trapezoidal and Euler's in Matlab platform. The established fact of lesser computation time in reduced order model has been verified and improvement in accuracy is observed.

Three-Level Five-Phase Space Vector PWM Inverter for a Two Five-Phase Series Connected Induction Machine Drive

This paper describes the decoupled torque and flux control of a two series connected five-phase Induction Machine (IM) drive that is supplied by a three-level five phase SVPWM inverter, using a well known phase transposition in the series connection. At the first, the decoupled torque and flux controller is developed based on variable-structure control (VSC). Then, a sliding-mode (SM) flux observer in employed to estimate the stator flux; that uses a two reference frames which result in eliminating the speed adaptation. Moreover simple control strategy is introduced for three-level SVPWM voltage source inverter (VSI) that can be easily implemented in practice for a two-series five phase IM drive. Finally, the effectiveness and capability of the proposed control method is verified by computer simulation.

HARDWARE-RESOURCE SAVING FOR REALIZATION OF SPACE VECTOR PWM BASED ON FPGA USING BUS-CLAMPING TECHNIQUE

The space vector pulse width modulation (SV-PWM) is more suitable and can increase the obtainable DC voltage utilization ratio very much compared to others PWM. Moreover, the modulation can obtain a better voltage total harmonic distortion (THD) factor. But until now, no studies that concern at hardware resources saving to realize SV-PWM based on FPGA. This paper proposes a new technique to realize SV-PWM based on FPGA. In order to get hardware resource saving, a simple technique to judge sectors, to calculate the firing pulses and to generate SV-PWM waveform without calculation of trigonometric function using bus-clamping technique is proposed. The technique has been implemented successfully based on APEX20KE FPGA to drive three phase induction machine 1.5 kW with low ripples in current and voltage, and has been shown that the proposed SVM method required the most minimum hardware resources compared to others research.

Space vector double frame field oriented control of six phase induction motors

In this paper a new rotor field orientation control of six phase induction machine is proposed. The machine has two three phase windings spatially shifted by 30 electrical degrees. The dynamic mode...

A Stator and Rotor Fault Detection Technique for Induction Machines in Traction Applications for Electric or Hybrid Electric Vehicles

Three phase induction machines for traction applications in electric and hybrid electric vehicles can be used with a fixed gear due to the wide speed range enabled by field weakening. Although the induction machine is know as an extremely reliable and robust device, machine faults may occur. Machine faults which do not become detected may cause complete failure of the vehicle. Therefore, early detection of machine faults must be seen as important contribution for reliability and predictive maintenance. Stator winding and rotor failures, however, are a serious problem of squirrel cage induction machines. In an electric or a hybrid electric vehicle the traction machine may undergo severe thermal stress. Stator faults may occur much faster due to insulation breakdown or overload and are therefore more critical with respect to time. Such failures have therefore to be detected immediately after occurring. This paper presents fault detection techniques for stator and rotor faults of squirrel cage induction machines. Both the presented methods are model based techniques, competent to handle variable speed and load operating conditions.

Drive for a Symmetrical Two-Phase Induction Machine Using Vector Modulation

In this paper a drive for a symmetrical two phase induction machine using vector modulation is studied. A comparison is made among different types of space vector modulation (discontinuous and continuous) and a new one is proposed. The concepts of vector modulation are reviewed. Experimental results to validate the theoretical statements are shown.

Dual-Three Phase Induction Machine Drives Control—A Survey

The paper aims to perform an overview on the state-of-the-art in the control of multi-phase drives employing dual-three phase induction machines. In particular, the paper is focused on modeling aspects, Pulse-Width Modulation (PWM) techniques for Voltage Source Inverters (VSI), Field Oriented Control (FOC) and Direct Torque Control (DTC) strategies for dual-three phase induction machines. Furthermore, the paper briefly presents the advantages of dual-three phase induction motor drives over the conventional three-phase drives and the different applications reported in the literature.

Multi-Phase System Supplied by Svm Vsi: A New Fast Algorithm to Compute Duty Cycles

SummaryMulti-phase drives are more and more often used in industry, especially for high-power applications [17, 18, 20]. Space Vector Modulation (SVM) is now widely implemented and possesses many advantages over carrier-based pulse width modulation (PWM):– natural overmodulation implementation;– easy solution for saturation treatment;– fast and convenient to compute;– easy implementation of switching constraints for example to reduce harmonic currents [19].Many authors proposed SVM VSI applied to multi-phase drives. For example, [2] and [15] have chosen instantaneous vectors to control dual 3-phase induction machines with low generated harmonic currents, [4] and [6] to control 5-phase machines. The initial space is split onto orthogonal subspaces (d-q and zero-sequence) and the initial reference vector can be expressed at any sampling time in terms of several reference vectors, each one belonging to one subspace (plane and/or line). Each reference vector is located onto a sector, bounded by two active vectors, and decomposed onto these vectors. Once the two vector components are known, duty ratios are determined. Then, zero vectors are chosen and switching sequencing is imposed. Due to the high number of phases, a high number of sectors exist and the location of the different reference vectors leads to a great computational requirement (Fig. 1a). Using the equivalence between a multi-phase machine and a set of fictitious one-phase or two- phase machines which are magnetically independent but mechanically and electrically coupled [1, 13], we propose a new fast algorithm to compute the duty cycles of each VSI leg. This algorithm, based on a vectorial approach of inverters developed in [3, 5, 7, 22], thereby reduces computation time and allows to use low computational requirements. This paper shows that, compared to classical techniques [9, 10, 11, 12], it is no more necessary to find the location of the reference vectors to get explicitly the duty cycle of each leg. Fig. 1 shows the difference between classical algorithm (Fig. 1a) and proposed one (Fig. 1b). This proposed technique is at first illustrated on a 3-phase drive. Geometrical representations allow then to establish links with usual 3-phase SVM. The implementation of the proposed SVM is achieved in the vector control of a 5-phase drive. Experimental results are presented and confirm the theoretical approach.

Electric Field Prediction for a Human Body-Electric Machine System

A system consisting of an electric machine and a human body is studied and the resulting electric field is predicted. A 3-phase induction machine operating at full load is modeled considering its geometry, windings, and materials. A human model is also constructed approximating its geometry and the electric properties of tissues. Using the finite element technique the electric field distribution in the human body is determinedfor a distance of 1 and 5 m from the machine and its effects are studied. Particularly, electric field potential variations are determined at specific points inside the human body and for these points the electric field intensity is computed and compared to the limit values for exposure according to international standards.