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Nomenclatura Unesco > (33) Ciencias Tecnológicas > (3306) Ingeniería y tecnología eléctricas > (3306.03) Motores eléctricos

Mostrando recursos 1 - 20 de 1,133

1. Automatización de una cortadora de vástagos con Canopen - KUZEV, KALOYAN KAMENOV
En este proyecto se tendrá como objetivo diseñar la parte eléctrica, hacer la instalación y programar una maquina relacionada con el sector del textil. La máquina que se va a diseñar tiene como propósito cortar unos pequeños hilos que sobresalen por encima de la cara buena del tejido que se va a procesar y son resultado de la fabricación del mismo. Desde el tejido salen como unos puentes de hilo entre dos puntos de costura. Son un resultado indeseable y han de ser partidos por la mitad para que a continuación puedan ser eliminados en su totalidad con otro tipo...

2. Diseño mecánico de un motor para bicicleta eléctrica y definición de especificaciones eléctricas del circuito de control, tanto para el funcionamiento normal como para la recarga de la batería durante el frenado - REQUENA MIRÓ, JOAN
Requena Miró, J. (2014). Diseño mecánico de un motor para bicicleta eléctrica y definición de especificaciones eléctricas del circuito de control, tanto para el funcionamiento normal como para la recarga de la batería durante el frenado.

3. Multimodal Hybrid Powerplant for Unmanned Aerial Systems (UAS) Robotics - Richard Glassock; Jane Y. Hung; Luis Felipe Gonzalez; Rodney A. Walker
Most UAS propulsion systems currently utilize either Internal Combustion Engines (ICE) or Electric Motor (EM) prime movers. ICE are favoured for aircraft use due to the superior energy density of fuel compared to batteries required for EM, however EM have several significant advantages. A major advantage of EM is that they are inherently self starting have predictable response characteristics and well developed electronic control systems. EMs are thus very easy to adapt to automatic control, whereas ICE have more complex control response and an auxiliary starting motor is required for automated starting. This paper presents a technique for determining the...

4. Integration Methodologies for Disparate Software Packages with an Emphasis on Usability Lyndon Evans - Vic Grout; Dave Staton; Dougie Hawkins
This paper describes a novel approach to program script generation. The goals are twofold: to allow a number of different software packages to be implemented together and to permit a user with little or no programming skill to produce executable code. The principles and requirements of such a system are discussed and an outline approach is suggested. A case study based on electric motor design is presented for which early results are encouraging. Future development is considered in conclusion.

5. On the Transient Modelling of PM Motors - José Carlos Quadrado
Abstract:- A model for a PM electric motor describing transient operation is presented. The paper provides an outline of the equivalent magnetic circuit modelling method used and the model parameters for a Permanent Magnet motor. The operation of a 40 kW motor-generator is used to illustrate the model accuracy compared with results provided by a conventional analytical model. The advantage of the proposed electric motor model is that it is computationally inexpensive, yet offers high accuracy. Key-Words:- Modelling, permanent magnet motor 1

6. Ultracapacitor technologies and applications in hybrid and electric vehicles - Andrew Burke
This paper focuses on ultracapactors (electrochemical capacitors) as energy storage in vehicle applications and thus evaluates the present state-of-the-art of ultracapacitor technologies and their suitability for use in electric and hybrid drivelines of various types of vehicles. A key consideration in determining the applicability of ultracapacitors for a particular vehicle application is the proper assessment of the energy storage and power requirements. For hybrid-electric vehicles, the key issues are the useable energy requirement and the maximum pulse power at high efficiency. For a Prius size vehicle, if the useable energy storage is about 125 Wh and needed efficiency is 90-95%,...

7. KOREA - Jin Hur; Ha-gyeong Sung; Jung-pyo Hong
Abstract:- This paper aims to develop the 42V BLDC fan motor for hybrid electric vehicle using metal powdered core. So, the influence on a motor design by metal powder is described and the powder is applied as a direct replacement of lamination core. This point is focused upon a comparison of brushless dc motors, built with a powdered stator and Si laminated stator, which also has been redesigned to take an advantage of the powdered core for improving their performance on the same volume. Key-Words:- 42V cooling fan motor, BLDC motor, Metal powdered core, Si laminated core, EMCN method 1

8. First Flight of Scaled Electric Solar Powered UAV for Mediterranean Sea Border Surveillance Forest and Fire Monitoring - G. Romeoa; M. Pacinoa; F. Borello A; A Politecnico Di Torino
Research is being carried out (as part of several EC funded projects) with the aim of designing Very-Long Endurance Solar Powered Autonomous Stratospheric UAV (VESPAS-UAV) and manufacturing a solar powered prototype. This It could play the role of a pseudo satellite, with the advantage of allowing a more detailed land vision due to the relative closeness to the land and at a much lower cost than a real satellite. 300km diameter area could be monitored by each of these platforms. The full scale HELIPLAT R © UAV and SHAMPO UAV were designed using the most advanced tools to obtain an...

9. Diagnosis of dynamic systems does not necessarily require simulation - Andreas Malik; Peter Struss
We present a paradigmatic example of a feedback-controlled system: an electric motor with sensor and controller. Diagnosis of this system is performed based on a qualitative model that reflects deviations of parameters and behavior from a fixed reference state. The hypothesis that has been examined in this case study is that detection of behavior discrepancies does not necessarily require simulation of behavior, but can be done by checking (qualitative) states only. The qualitative models and the state-based diagnosis algorithm proved to establish a basis sufficient for fault detection and fault identification in the motor example. Some of the general preconditions...

10. Readhesion Control of Single-Inverter-Multiple-Motor AC Traction Drives for Electric Railways by Using Multirate Sampling Observer - Lilit Kovudhikulrungsri; Daisuke Tateishi; Takafumi Koseki
This paper proposes an effective way to realize fast readhesion control of single-inverter-multiple motor traction drives. To do this, multirate sampling observers are introduced to all axles in order to estimate precise speed and load torque at every sampling instant. The slip-slide is detected by using the amount of the load torque correction estimated from the multirate sampling observer, which is insensitive to the effect of slope. The performance of the proposed control scheme is verified by comparing with the conventional method.

11. Multilevel Inverters for Electric Vehicle Applications - Leon M. Tolbert
Abstract This paper presents multilevel inverters as an application for all-electric vehicle (EV) and hybrid-electric vehicle (HEV) motor drives. Diode-clamped inverters and cascaded H-bridge inverters, (1) can generate near-sinusoidal voltages with only fundamental frequency switching; (2) have almost no electromagnetic interference (EMI) and common-mode voltage; and (3) make an EV more accessible/safer and open wiring possible for most of an EV’s power system. This paper explores the benefits and discusses control schemes of the cascade inverter for use as an EV motor drive or a parallel HEV drive and the diode-clamped inverter as a series HEV motor drive. Analytical, simulated,...

12. Development of a three-phase three-level inverter for an electric vehicle - Xiaoming Li; Richard Duke; Simon Round
The development of variable speed AC induction motor drive systems for electric vehicles has been carried out at the University of Canterbury for more than 20 years. A three-phase three-level IGBT inverter has been developed for the University of Canterbury electric vehicle propulsion system. This paper deals with the three-phase three-level inverter switching device selection and inverter construction details. Experimental testing has been undertaken to examine the operating characteristics of the completed three-phase three-level inverter driving one of the electric vehicle motors. 1.

13. Reliability Estimation of Complex Technical Systems with Dependency Modelling: A Fuzzy Approach - Edwin Vijay Kumar; S. K. Chaturvedi
Complex technical systems may fail unexpectedly leading to process disruption and may bring a safety-hazard situation. The system failure is an outcome of failure dependency among subsystems where the degradation process of subsystems/components is random and uncertain process. Hence, reliability assessment of complex systems is of paramount importance. Quantitative reliability assessment needs failure data, which is scarce and/or not well-recorded, thus statistically inconsistent in process industry. Most often, in such industries, the reliability is expressed linguistically (like Good, OK, Bad, etc.,) rather than quantitatively. This paper proposes an approach for quantitative reliability estimation considering failure dependency among subsystems using fuzzy...

14. Wireless power transmission system for a Micro Aerial Vehicle - Eri Shimane; Alseny Diallo; Takashi Komaru; Kimiya Komurasak; Yoshihiro Arakawa
Wireless power transmission system for a Micro Aerial Vehicle using microwave has been studied. In a transmitter system a microwave beam was formed and steered from-9deg to +9deg. In a rectenna system, eight rectennas were arrayed and connected in parallel to drive an electric motor on an MAV model at the altitude of 80cm from the transmitter emitting 3.5W power in total. In a tracking system, two pairs of receiver patch antennas with a leaf pattern were set in rectangular coordinates to detect the position of the MAV while it is circling over the transmitter. 1.

15. $rec.titulo
The reliability and performance of the AC drives depends on the progress in power electronics, microelectronics, control methods, artificial intelligent techniques and so on. Fuzzy Logic Concept (FLC), one of the Artificial Intelligent methods has found high applications in most of the nonlinear systems like the electric motor drives. FLC can be used as controller for any system without requirement of the system mathematical model unlike that of the conventional electrical drive control, which uses the mathematical model. Due to the usage of the FLC concept, the efficiency, reliability & performance of the AC drives increases. In view of the...

16. Diagnosis of dynamic systems does not necessarily require simulation - Andreas Malik; Peter Struss
We present a paradigmatic example of a feedback-controlled system: an electric motor with sensor and controller. Diagnosis of this system is performed based on a qualitative model that reflects deviations of parameters and behavior from a fixed reference state. The hypothesis that has been examined in this case study is that detection of behavior discrepancies does not necessarily require simulation of behavior, but can be done by checking (qualitative) states only. The qualitative models and the state-based diagnosis algorithm proved to establish a basis sufficient for fault detection and fault identification in the motor example. Some of the general preconditions...

17. A Structural Empirical Model of R&D, Firm Heterogeneity and Industry Evolution,” Working Paper - Daniel Yi Xu
This paper develops and estimates a dynamic industry equilibrium model of R&D, R&D spill-overs, and productivity evolution of manufacturing plants in the Korean electric motor industry from 1991 to 1996. Plant-level decisions for R&D, physical capital investment, entry, and exit are integrated in an equilibrium model with imperfectly competitive product market. Estimates of the structural parameters explains observed heterogeneity in plant R&D choice, size, and turnover, and quantifies how R&D and R&D spill-overs drive the change of plant productivity and industry structure. Given the structural estimates, I study an important policy question: how does product market competition affect individual firm...

18. Test Methods for Determining the Impact of Motor Condition on Motor Efficiency and Reliability - Dr Howard; W. Penrose; Ph. D
This article discusses the financial impact of motor condition on electric motor efficiency and reliability by reviewing a combination of Motor Circuit Analysis (MCA) and vibration techniques. Cost impacts on energy, production and maintenance will be outlined. The topic will surround a utility study and US Department of Energy market transformation success during 2000 and 2001. The primary areas of concern are phase balance, rotor bars, cleanliness and bearing issues.

19. Comparison of some Techniques for Learning-Based Pattern Classification in Technical Diagnosis - Einar Lihovd; Magnus RASMUSSEN
This paper reports a comparison study of 5 selected techniques for learning-based pattern classification. The techniques are the Linear Discriminant, the k-Nearest Neighbour Rule, the Classification Tree, and the 2 types of feed-forward artificial neural networks called the Backpropagation network and the Cascade-Correlation network. Each technique is briefly introduced and a test case involving a centrifugal pump driven by an electric motor is then presented. An extensive set of vibration and process measurements was collected for the machinery both in healthy and faulty conditions, and this was then used for training and testing the different classifiers. Key Words: Learning-based pattern...

20. Casa aïllada energèticament sostenible: subministrament elèctric i optimització d'energia tèrmica - RIPOLL MONTELL, JORGE
[VAL] Al present treball s’estudien dos sistemes que aprofiten la radiació solar per generar energia tèrmica i elèctrica, minimitzant l’ús de combustibles fòssils. Per aconseguir-ho, s’ha dimensionat una instal·lació completa de captació solar tèrmica amb emmagatzemament d’aigua, per a ser consumida quan així ho requereix la demanda, a més, d’una instal·lació solar fotovoltaica capaç de generar energia elèctrica per consum directe dels receptors existents a la vivenda, tot amb l’estudi de la possible demanda energètica dels usuaris i en funció de l’època de l’any d’utilització. El projecte valora les opcions possibles d’instal·lació i les decisions es prenen pensant en la cobertura energètica...

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