Download or read book Strat gies de commande minimisant les pertes d un ensemble convertisseur machine alternative written by Philippe Bastiani and published by . This book was released on 2001 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans le contexte de la traction électrique, l'amélioration du rendement de l'ensemble convertisseur-machine alternative est une nécessité. L'optimisation énergétique globale impose une approche système. Pour parvenir à cet objectif, nous avons opté pour une démarche algébrique s'appuyant sur les modélisations des parties constituantes des sous-ensembles. Dans une première phase, un modèle de Park de la machine synchrone prenant en compte la saturation du circuit magnétique et les pertes fer a été élaboré. Ensuite, un modèle moyen d'ondulateur a été utilisé afin d'obtenir un modèle de pertes simplifié s'intégrant dans notre approche d'optimisation. Ainsi, un modèle considérant les pertes de la machine synchrone et les pertes du convertisseur a pu être obtenu. Des résultats expérimentaux ont permis de valider nos approches. Ce travail propose une méthodologie basée sur une formulation algébrique générale des lois de consignes nécessaires à une demande de couple. Les algorithmes prennent en compte la saturation du circuit magnétique et considèrent les pertes de la machine et de son convertisseur. Des résultats expérimentaux ont permis de vérifier leurs validités en temps réel sur plusieurs bancs de tests. Le gain sur le rendement est significatif par rapport aux stratégies de commandes usuelles. La démarche proposée peut être généralisée à d'autres configurations machine-convertisseur. Ainsi, nous avons étendu cette approche à la machine asynchrone. En complément de cette étude, nous nous sommes intéressés à l'influence, dans le plan couple vitesse, des limitations naturelles des tensions et des courants. Ainsi, des formulations algébriques du plan couple vitesse et des stratégies d'optimisation sous contraintes ont été proposées.
Download or read book Faecal Sludge Management written by Linda Strande and published by IWA Publishing. This book was released on 2014-08-15 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Download or read book Handbook of Automotive Power Electronics and Motor Drives written by Ali Emadi and published by CRC Press. This book was released on 2017-12-19 with total page 909 pages. Available in PDF, EPUB and Kindle. Book excerpt: Initially, the only electric loads encountered in an automobile were for lighting and the starter motor. Today, demands on performance, safety, emissions, comfort, convenience, entertainment, and communications have seen the working-in of seemingly innumerable advanced electronic devices. Consequently, vehicle electric systems require larger capacities and more complex configurations to deal with these demands. Covering applications in conventional, hybrid-electric, and electric vehicles, the Handbook of Automotive Power Electronics and Motor Drives provides a comprehensive reference for automotive electrical systems. This authoritative handbook features contributions from an outstanding international panel of experts from industry and academia, highlighting existing and emerging technologies. Divided into five parts, the Handbook of Automotive Power Electronics and Motor Drives offers an overview of automotive power systems, discusses semiconductor devices, sensors, and other components, explains different power electronic converters, examines electric machines and associated drives, and details various advanced electrical loads as well as battery technology for automobile applications. As we seek to answer the call for safer, more efficient, and lower-emission vehicles from regulators and consumer insistence on better performance, comfort, and entertainment, the technologies outlined in this book are vital for engineering advanced vehicles that will satisfy these criteria.
Download or read book How to Design Wastewater Systems for Local Conditions in Developing Countries written by David M. Robbins and published by IWA Publishing. This book was released on 2014-03-15 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a practical handbook providing a step-by-step approach to the techniques used for characterizing wastewater sources and investigating sites where collection, treatment and reuse/disposal technologies will be installed. It is intended to help enable local implementation of on-site and decentralized wastewater management system (DWMS)for wide scale use in development settings. How to Design Wastewater Systems for Local Conditions in Developing Countries helps local service providers and regulatory officials make informed decisions through the use of tools, checklists and case studies. It includes a link to a web based community of on-site and decentralized wastewater professionals, which contains related tools and case studies. This handbook serves as a reference for training classes, certification programs, and higher education programs in civil and sanitary engineering. There is an increasing interest on the part of local government officials and private sector service providers to implement wastewater treatment systems to solve sanitation problems. The model presented in this handbook promotes activities that first generate data related to source and site conditions that represent critical inputs, and then applies this information to the technology selection process. Matching the most appropriate technologies to the specific needs of the wastewater project is the key that leads to long term sustainability. How to Design Wastewater Systems for Local Conditions in Developing Countries is an invaluable resource for public sector decision makers and private sector service providers in developing countries. It is also a useful text for students at engineering colleges in developing countries interested in taking a class that teaches the methods of decentralized wastewater management system (DWMS) development.
Download or read book Compendium of Sanitation Systems and Technologies written by Elizabeth Tilley and published by . This book was released on 2014 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bank Profitability Statistical Supplement written by Organisation for Economic Co-operation and Development and published by . This book was released on 1987 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
