21,696 research outputs found
An educational tool to assist the design process of switched reluctance machines
The design of electric machines is a hot topic in the syllabuses of several undergraduate and
graduate courses. With the development of hybrid and electrical vehicles, this subject is gaining
more popularity, especially in electrical engineering courses. This paper presents a computeraided
educational tool to guide engineering students in the design process of a switched
reluctance machine (SRM). A step-by-step design procedure is detailed and a user guide
interface (GUI) programmed in the Matlab® environment developed for this purpose is shown.
This GUI has been proved a useful tool to help the students to validate the results obtained in
their lecture assignments, while aiding to achieve a better understanding of the design process of
electric machines. A validation of the educational tool is done by means of finite element
method (FEM) simulations.Postprint (author's final draft
In-wheel motor design for electric vehicles
In this work an in-wheel electric motor prototype has been designed for experimental purposes. In-Wheel Motor (Hub motor) can be used in electric cars with 4 wheel independent drive configuration. Within every wheel, there can be one “Direct-Drive In-Wheel Motor” to generate the necessary torque per wheel. Unlike conventional “central drive unit” systems, torque as well as the power and speed can be supplied to each tire independently. The difference in this work is the design of a direct drive electric motor which is able to carry transverse loading acts on a tire. Type of the motor is called inverted configuration or outer rotor structure in the literature. The electric machine designed in this work is Switched Reluctance Machine. First a 3D solid model was created. Necessary strength analyses have been done. Simultaneously, electromagnetic FEA has been done, when it is necessary either of the designs were modified until it converged to a set of consistent dimensions for both mechanic and electromagnetic design. Last, the results of the electromagnetic analysis were embedded into a hybrid simulation model, in order to check the coherency between the design and the analysis. The results were coherent
A general magnetic-energy-based torque estimator: validation via a permanent-magnet motor drive
This paper describes the use of the current–flux-linkage ( ) diagram to validate the performance of a general magnetic-energy-based torque estimator. An early step in the torque estimation is the use of controller duty cycles to reconstruct the average phase-voltage waveform during each pulsewidth-modulation (PWM) switching period. Samples over the fundamental period are recorded for the estimation of the average torque. The fundamental period may not be an exact multiple of the sample time. For low speed, the reconstructed voltage requires additional compensation for inverter-device losses. Experimental validation of this reconstructed waveform with the actual PWM phase-voltage waveform is impossible due to the fact that one is PWM in nature and the other is the average value during the PWM period. A solution to this is to determine the phase flux-linkage using each waveform and then plot the resultant loops. The torque estimation is based on instantaneous measurements and can therefore be applied to any electrical machine. This paper includes test results for a three-phase interior permanent-magnet brushless ac motor operating with both sinusoidal and nonsinusoidal current waveforms
Modelling and Control of Switched Reluctance Machines
Today, switched reluctance machines (SRMs) play an increasingly important role in various sectors due to advantages such as robustness, simplicity of construction, low cost, insensitivity to high temperatures, and high fault tolerance. They are frequently used in fields such as aeronautics, electric and hybrid vehicles, and wind power generation. This book is a comprehensive resource on the design, modeling, and control of SRMs with methods that demonstrate their good performance as motors and generators
Modelling and Control of Switched Reluctance Machines
Today, switched reluctance machines (SRMs) play an increasingly important role in various sectors due to advantages such as robustness, simplicity of construction, low cost, insensitivity to high temperatures, and high fault tolerance. They are frequently used in fields such as aeronautics, electric and hybrid vehicles, and wind power generation. This book is a comprehensive resource on the design, modeling, and control of SRMs with methods that demonstrate their good performance as motors and generators
Comparison of Switched Reluctance Motor and Double Stator Switched Reluctance Motor
This thesis is concerned with the design and analysis of Switched Reluctance Motor (SRM) and its improved structure Double Stator Switched Reluctance Motor (DSSRM). Three configurations of SRM viz. Inner Stator, Outer stator and Double Stator are designed and simulated in ANSYS Maxwell Suite. Design parameters are chosen by aiming optimum performance of motor after literature review and analytical study of the motor. SRM is not a line start machine, so power converter circuit is required to excite the motor. Without proper switching of current, desired torque is not obtained in SRM. The converter circuit and switching unit is built in Maxwell Circuit Editor Tools. Both magnetostatics and transient analysis is performed to investigate motion torque, torque ripple, normal force and radial force. A good comprehensive comparison of three different types of SRMs based on their torque profile and force densities is presented. Simulation performed verified better performance of DSSRM
Comparison of Switched Reluctance Motor and Double Stator Switched Reluctance Motor
This thesis is concerned with the design and analysis of Switched Reluctance Motor (SRM) and its improved structure Double Stator Switched Reluctance Motor (DSSRM). Three configurations of SRM viz. Inner Stator, Outer stator and Double Stator are designed and simulated in ANSYS Maxwell Suite. Design parameters are chosen by aiming optimum performance of motor after literature review and analytical study of the motor. SRM is not a line start machine, so power converter circuit is required to excite the motor. Without proper switching of current, desired torque is not obtained in SRM. The converter circuit and switching unit is built in Maxwell Circuit Editor Tools. Both magnetostatics and transient analysis is performed to investigate motion torque, torque ripple, normal force and radial force. A good comprehensive comparison of three different types of SRMs based on their torque profile and force densities is presented. Simulation performed verified better performance of DSSRM
Fault detection and diagnosis technique for a SRM drive based on a multilevel converter using a machine learning approach
Trabalho apresentado em 12th International Conference on Renewable Energy Research and Applications (ICRERA 2023), 29 augusto-1 setembro 2023, Oshawa, CanadaSRM drives based on multilevel converters is
now a solution well accepted due to their interesting features
like extended voltage range and capability to fault tolerance.
However, one aspect that is fundamental to ensure fault
tolerance or preventive maintenance is the fault detection and
diagnosis of failures in power semiconductors. In this way, in
this paper it is presented a new diagnostic method for the
failure of those semiconductors in asymmetric neutral point
clamped converters. The proposed method will be based on
the development of specific patterns that are associated to
each semiconductor and fault type. The procedures presented
here are based on the image identification of the currents
patterns in the multilevel converter that allow the
identification of distinct fault type. The pattern recognition
system uses visual-based efficient invariants features for
continuous monitoring of multilevel converter The proposed
method will be verified through several tests in which were
used a simulation tool and an experimental prototype.N/
Scale Models Formulation of Switched Reluctance Generators for Low Speed Energy Converters
info:eu-repo/semantics/publishedVersio
Switched Reluctance Motor Drives for Hybrid Electric Vehicles
Because of the ever‐increasing concerns on the energy utilization and environmental protection, the development of hybrid electric vehicles (HEVs) has become a hot research topic. As the major part of HEV technologies, the electric motor drives have to offer high efficiency, high power density, high controllability, wide‐speed operating range, and maintenance‐free operation. In particular, the switched reluctance (SR) motor drive can achieve most of these goals; therefore, this motor type has drawn much attention in the past. This chapter aims to serve as an overview of the latest developments of the SR motor drive, purposely for HEV applications. To be specific, the discussions on motor structures for torque density enhancement and torque ripple minimization are covered
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