Edilberto Hall
Universidad Tecnológica de Panamá, Facultad de Ingenieria Eléctrica, Department Member
When sizing and subsequently designing an electric motor drive for any battery-powered electric vehicle (EV), the main objective is to get a large charge range while achieving low drive weight, volume and cost. The selection of the speed... more
When sizing and subsequently designing an electric motor drive for any battery-powered electric vehicle (EV), the main objective is to get a large charge range while achieving low drive weight, volume and cost. The selection of the speed ratio (i.e., motor maximum speed divided by its rated speed) has a great impact on the drive efficiency, weight, volume and cost. To this end, the paper presents a methodology to determine the optimum speed ratio of an induction motor drive for EV applications using the EV America Technical Specifications as the basis. Factors like the peak power rating, continuous power rating, peak current, weight, volume and average loss of motor drives are functions of the speed ratio. The paper shows the need to consider several performance and design factors besides the peak power rating, and includes a set of criteria for selecting the optimum speed ratio of induction motors used in EV applications. The optimum speed ratio was found to be 3.0, where the motor weight, volume, cost, drive peak current and average losses (affecting the life of the battery pack) are low.
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En marzo del 2002 la Universidad Tecnologica de Panama (UTP) pone en marcha el Programa de Ahorro de Energia Electrica debido al alto costo de la misma y la elevada facturacion por consumo anual. Para el ano 2002 se estimo que esta... more
En marzo del 2002 la Universidad Tecnologica de Panama (UTP) pone en marcha el Programa de Ahorro de Energia Electrica debido al alto costo de la misma y la elevada facturacion por consumo anual. Para el ano 2002 se estimo que esta ascenderia a B/. 1.20 millones lo que motivo la creacion urgente de un programa supervisado que permita reducir el consumo y controlar el pago por energia electrica.
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De todos es conocido el impacto que el alto costo de la electricidad ha causado en nuestras economias, su influencia en los costos de los productores y servicios, y en el nivel de vida de los panamenos
El objetivo de este articulo es el de presentar una vision general sobre el impacto que ha tenido la energia electrica en el desarrollo cientifico y tecnologico mundial. Se desarrolla una cronologia de la revolucion industrial,... more
El objetivo de este articulo es el de presentar una vision general sobre el impacto que ha tenido la energia electrica en el desarrollo cientifico y tecnologico mundial. Se desarrolla una cronologia de la revolucion industrial, caracterizada por sus dos periodos denominados: la primera revolucion industrial y la segunda revolucion industrial o revolucion capitalista, describiendose los principales tipos de energia y su impacto en la evolucion tecnologica. Ademas, se presentan: una breve resena de la electrificacion en Panama y la importancia que esta tuvo durante la construccion y operacion del Canal de Panama; la evolucion de la integracion electrica nacional y su eventual privatizacion a finales del siglo XX; algunos datos actuales de la composicion de la matriz energetica, aunado a estimaciones realizadas por investigadores de la Universidad Tecnologica de Panama sobre el potencial hidrico nacional para la generacion de electricidad y un analisis de una vision de futuro de la ele...
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Se propone un modelo que fomenta la colaboracion y las buenas practicas en la gestion para el desarrollo de las actividades de investigacion, desarrollo e innovacion denominado INTEGRA ME. Requiere de un conjunto de herramientas,... more
Se propone un modelo que fomenta la colaboracion y las buenas practicas en la gestion para el desarrollo de las actividades de investigacion, desarrollo e innovacion denominado INTEGRA ME. Requiere de un conjunto de herramientas, mecanismos y lineamientos institucionales que faciliten la investigacion. Incorpora las opiniones e intereses de todos los actores directos en la investigacion universitaria. Persigue objetivos de calidad y pertinencia social de las actividades de investigacion de manera que se produzcan verdaderos efectos multiplicadores. Es un modelo flexible, adaptable, ajustable y dinamico con un enfoque holistico, es decir, es concreto, funcional y replicable. Conforma un sistema para la discusion y seguimiento de los proyectos, mecanismos para la transferencia de informacion o de conocimiento, una plataforma para la comunicacion y transferencia del conocimiento, asi como tambien un programa de pasantias, de alli la denominacion INTEGRA ME. La terminacion ME indica que...
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El ahorro energetico y el uso racional y eficiente de la energia han demostrado ser programas que, disenado y ejecutados efectivamente, logran mitigar los problemas del alto consumo energetico en las industrias, especialmente en tiempos... more
El ahorro energetico y el uso racional y eficiente de la energia han demostrado ser programas que, disenado y ejecutados efectivamente, logran mitigar los problemas del alto consumo energetico en las industrias, especialmente en tiempos de altos precios de los derivados del petroleo, escasez de la oferta de energia electrica, y debido a fenomenos climatologicos periodicos tales como El Nino.
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This paper presents a comparison among different models used to represent the windings and their influence in the mechanic torque obtained from the finite element analysis. The results of the simulations are compared with those obtained... more
This paper presents a comparison among different models used to represent the windings and their influence in the mechanic torque obtained from the finite element analysis. The results of the simulations are compared with those obtained from the static measurements of a real 8/6 switched reluctance motor, designed for an electric vehicle application. Also, the mathematical model of the spatially distributed coils, used for the simulations, is developed. Furthermore, the theory supporting the different torque results, obtained with the models, is presented.
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Abstract The main purpose of this paper is to provide the non-specialist engineer of a qualitative practical guide for the initial selection of the technology to use in a wind generation system. We achieve this by documenting the... more
Abstract The main purpose of this paper is to provide the non-specialist engineer of a qualitative practical guide for the initial selection of the technology to use in a wind generation system. We achieve this by documenting the comparative and absolute ...
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This paper consists in developing a software that simplifies the design processes of a regular 6/4 switched reluctance motor (SRM) or its multiples, so that the problems involved when using the conventional procedures can be avoided. We... more
This paper consists in developing a software that simplifies the design processes of a regular 6/4 switched reluctance motor (SRM) or its multiples, so that the problems involved when using the conventional procedures can be avoided. We wrote this software so that it could generate a set of machines satisfying the entrance parameters. Then, an inner cycle chooses the one which better fits the users requirements and sends it to finite element analysis. The model developed for the FEA allows the analysis of any regular SRM and includes a windings model that differ from those commonly used because it represents the windings cross section exactly. Finally, we compared the results with those presented in [1], to verify the correct performance of the tool.