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Author: Samuel Kärnell Publisher: Linköping University Electronic Press ISBN: 9179298303 Category : Languages : en Pages : 72
Book Description
More and more vehicles are being electrified. Mobile working machines and heavy trucks are not excluded, and these machines are often hydraulically intense. Electrification entails new requirements for the hydraulic system and its components, and these requirements must be taken into consideration. Hydraulic systems have looked similar for a long time, but now there is an opportunity to advance. Many things change when a diesel engine is replaced with an electric motor. For example, variable-speed control becomes more relevant, electric regeneration becomes possible, and the use of multiple prime movers becomes an attractive alternative. The noise from the hydraulic system will also be more noticeable when the diesel engine is gone. Furthermore, the introduction of batteries to the system makes the energy more valuable, since batteries are heavy and costly compared to a diesel tank. Therefore, it is commercially viable to invest in the hydraulic system. This thesis revolves around the heart of the hydraulic system, that also is the root of all evil. That is the pump. Traditionally, a pump has had either a fixed displacement or a continuously variable displacement. Here, the focus is on something in between, namely a pump with discrete displacement. The idea of discrete displacement is far from unique, but has not been investigated in detail in combination with variable speed before. In this thesis, a novel design for a quiet pump with discrete displacement is presented and analysed. The results show that discrete displacement is relevant from an energy perspective for machines working extensively at high pressure levels and with low flow rates, and that a few discrete values are enough to make a significant difference. However, for other cycles, the possible energy gains are very limited, but the discrete displacement can be a valuable feature if downsizing the electric machine is of interest.
Author: Samuel Kärnell Publisher: Linköping University Electronic Press ISBN: 9179298303 Category : Languages : en Pages : 72
Book Description
More and more vehicles are being electrified. Mobile working machines and heavy trucks are not excluded, and these machines are often hydraulically intense. Electrification entails new requirements for the hydraulic system and its components, and these requirements must be taken into consideration. Hydraulic systems have looked similar for a long time, but now there is an opportunity to advance. Many things change when a diesel engine is replaced with an electric motor. For example, variable-speed control becomes more relevant, electric regeneration becomes possible, and the use of multiple prime movers becomes an attractive alternative. The noise from the hydraulic system will also be more noticeable when the diesel engine is gone. Furthermore, the introduction of batteries to the system makes the energy more valuable, since batteries are heavy and costly compared to a diesel tank. Therefore, it is commercially viable to invest in the hydraulic system. This thesis revolves around the heart of the hydraulic system, that also is the root of all evil. That is the pump. Traditionally, a pump has had either a fixed displacement or a continuously variable displacement. Here, the focus is on something in between, namely a pump with discrete displacement. The idea of discrete displacement is far from unique, but has not been investigated in detail in combination with variable speed before. In this thesis, a novel design for a quiet pump with discrete displacement is presented and analysed. The results show that discrete displacement is relevant from an energy perspective for machines working extensively at high pressure levels and with low flow rates, and that a few discrete values are enough to make a significant difference. However, for other cycles, the possible energy gains are very limited, but the discrete displacement can be a valuable feature if downsizing the electric machine is of interest.
Author: Andrea Vacca Publisher: John Wiley & Sons ISBN: 1119569109 Category : Science Languages : en Pages : 708
Book Description
HYDRAULIC FLUID POWER LEARN MORE ABOUT HYDRAULIC TECHNOLOGY IN HYDRAULIC SYSTEMS DESIGN WITH THIS COMPREHENSIVE RESOURCE Hydraulic Fluid Power provides readers with an original approach to hydraulic technology education that focuses on the design of complete hydraulic systems. Accomplished authors and researchers Andrea Vacca and Germano Franzoni begin by describing the foundational principles of hydraulics and the basic physical components of hydraulics systems. They go on to walk readers through the most practical and useful system concepts for controlling hydraulic functions in modern, state-of-the-art systems. Written in an approachable and accessible style, the book’s concepts are classified, analyzed, presented, and compared on a system level. The book also provides readers with the basic and advanced tools required to understand how hydraulic circuit design affects the operation of the equipment in which it’s found, focusing on the energy performance and control features of each design architecture. Readers will also learn how to choose the best design solution for any application. Readers of Hydraulic Fluid Power will benefit from: Approaching hydraulic fluid power concepts from an “outside-in” perspective, emphasizing a problem-solving orientation Abundant numerical examples and end-of-chapter problems designed to aid the reader in learning and retaining the material A balance between academic and practical content derived from the authors’ experience in both academia and industry Strong coverage of the fundamentals of hydraulic systems, including the equations and properties of hydraulic fluids Hydraulic Fluid Power is perfect for undergraduate and graduate students of mechanical, agricultural, and aerospace engineering, as well as engineers designing hydraulic components, mobile machineries, or industrial systems.
Author: Juha Pyrhonen Publisher: John Wiley & Sons ISBN: 1118701658 Category : Technology & Engineering Languages : en Pages : 612
Book Description
In one complete volume, this essential reference presents an in-depth overview of the theoretical principles and techniques of electrical machine design. This timely new edition offers up-to-date theory and guidelines for the design of electrical machines, taking into account recent advances in permanent magnet machines as well as synchronous reluctance machines. New coverage includes: Brand new material on the ecological impact of the motors, covering the eco-design principles of rotating electrical machines An expanded section on the design of permanent magnet synchronous machines, now reporting on the design of tooth-coil, high-torque permanent magnet machines and their properties Large updates and new material on synchronous reluctance machines, air-gap inductance, losses in and resistivity of permanent magnets (PM), operating point of loaded PM circuit, PM machine design, and minimizing the losses in electrical machines> End-of-chapter exercises and new direct design examples with methods and solutions to real design problems> A supplementary website hosts two machine design examples created with MATHCAD: rotor surface magnet permanent magnet machine and squirrel cage induction machine calculations. Also a MATLAB code for optimizing the design of an induction motor is provided Outlining a step-by-step sequence of machine design, this book enables electrical machine designers to design rotating electrical machines. With a thorough treatment of all existing and emerging technologies in the field, it is a useful manual for professionals working in the diagnosis of electrical machines and drives. A rigorous introduction to the theoretical principles and techniques makes the book invaluable to senior electrical engineering students, postgraduates, researchers and university lecturers involved in electrical drives technology and electromechanical energy conversion.
Author: Gus Wright Publisher: Jones & Bartlett Learning ISBN: 1284153592 Category : Transportation Languages : en Pages : 1423
Book Description
Fundamentals of Mobile Heavy Equipment provides students with a thorough introduction to the diagnosis, repair, and maintenance of off-road mobile heavy equipment. With comprehensive, up-to-date coverage of the latest technology in the field, it addresses the equipment used in construction, agricultural, forestry, and mining industries.
Author: Marcus Geimer Publisher: SAE International ISBN: 0768099544 Category : Technology & Engineering Languages : en Pages : 470
Book Description
Mobile Working Machines are defined by three characteristics. These machines have a cer-tain task of doing a working process, they are mobile, and they have a signifi cant energy share in their working functions. The machines should be as productive, efficient and of high quality as possible. All these machines in the fi eld of agriculture, forestry, construction, logistics, municipal sector, and in other special applications work in different applications. But, many technologies placed in the machines are the same, similar or comparable; therefore, different branches can learn from each other. Mobile Working Machines provides a wide and deep view into the technologies used in these machines. Appropriate for new engineers as well as those who wish to increase their knowledge in this field, this book brings together all the latest research and development into one place.
Author: Lino Guzzella Publisher: Springer Science & Business Media ISBN: 3540746927 Category : Technology & Engineering Languages : en Pages : 345
Book Description
The authors of this text have written a comprehensive introduction to the modeling and optimization problems encountered when designing new propulsion systems for passenger cars. It is intended for persons interested in the analysis and optimization of vehicle propulsion systems. Its focus is on the control-oriented mathematical description of the physical processes and on the model-based optimization of the system structure and of the supervisory control algorithms.
Author: Arthur Akers Publisher: CRC Press ISBN: 1420014587 Category : Science Languages : en Pages : 401
Book Description
The excitement and the glitz of mechatronics has shifted the engineering community's attention away from fluid power systems in recent years. However, fluid power still remains advantageous in many applications compared to electrical or mechanical power transmission methods. Designers are left with few practical resources to help in the design and
Author: TIMOTHY W. DELL Publisher: ISBN: 9781637761267 Category : Languages : en Pages : 860
Book Description
Hydraulic Systems for Mobile Equipment is the gold standard for hydraulics instruction, offering a comprehensive, single-source resource for introductory and advanced content. It provides very detailed, high-level instruction for students studying to become professional mobile hydraulics service technicians. With a primary emphasis on agricultural and construction machinery, it can also empower students working in any related field of hydraulics. The textbook is correlated to the competencies of the AED Hydraulics/Hydrostatics and Administrative/Safety Standards and the ASE Education Foundation Heavy Trucks Task List.
Author: Samuel Kärnell
Author: Samuel Kärnell
Author: Andrea Vacca
Author: Juha Pyrhonen
Author: R.H. Warring
Author: Gus Wright
Author: Marcus Geimer
Author: Lino Guzzella
Author: Arthur Akers
Author: TIMOTHY W. DELL
Author: Ramesh K. Agarwal