This book offers an essential compendium on the analysis and design of synchronous motors for variable-speed applications. Focusing on synchronous reluctance and ferrite permanent-magnet (PM) synchronous reluctance machines, it provides a broad perspective on three-phase machines for variable speed applications, a field currently dominated by asynchronous machines and rare-earth PM synchronous machines. It also describes synchronous reluctance machines and PM machines without rare-earth materials, comparing them to state-of-the-art solutions. The book provides readers with extensive information on and finite element models of PM synchronous machines, including all relevant equations and with an emphasis on synchronous-reluctance and PM-assisted synchronous-reluctance machines. It covers ferrite-assisted machines, modeled as a subcase of PM-assistance, fractional slot combinations solutions, and a quantitative, normalized comparison of torque capability with benchmark PM machines. The book discusses a wealth of techniques for identifying machine parameters, with an emphasis on self-commissioning algorithms, and presents methods for automated machine design and optimization, including a software tool developed for this purpose. Addressing an important gap in the field of PM-less and less-PM electrical machines, it is intended as a self-contained reference guide for both graduate students and professional machine designers, and as a useful text for university courses on automated and/or optimized design of electrical machines and drives.
This book offers an essential compendium on the analysis and design of synchronous motors for variable-speed applications. Focusing on synchronous reluctance and ferrite permanent-magnet (PM) synchronous reluctance machines, it provides a broad perspective on three-phase machines for variable speed applications, a field currently dominated by asynchronous machines and rare-earth PM synchronous machines. It also describes synchronous reluctance machines and PM machines without rare-earth materials, comparing them to state-of-the-art solutions. The book provides readers with extensive information on and finite element models of PM synchronous machines, including all relevant equations and with an emphasis on synchronous-reluctance and PM-assisted synchronous-reluctance machines. It covers ferrite-assisted machines, modeled as a subcase of PM-assistance, fractional slot combinations solutions, and a quantitative, normalized comparison of torque capability with benchmark PM machines. The book discusses a wealth of techniques for identifying machine parameters, with an emphasis on self-commissioning algorithms, and presents methods for automated machine design and optimization, including a software tool developed for this purpose. Addressing an important gap in the field of PM-less and less-PM electrical machines, it is intended as a self-contained reference guide for both graduate students and professional machine designers, and as a useful text for university courses on automated and/or optimized design of electrical machines and drives.
Most research on framing has focused on media and elite frames: the ways that the mass media and politicians present information about issues and events to the public. Until now, the process by which citizens’ opinions may affect the initial frame-building process has been largely ignored. The two-way flow of influence between public opinion and decision-makers has been analyzed more from a top-down than a bottom-up perspective. Olmastroni addresses this issue by introducing a cyclical model of framing. Additionally, most empirical studies on media framing have centered on the United States. Olmastroni’s text seeks to overcome this limitation of prior research by examining different types of framing in three different countries. Framing War uses the recent war on Iraq as a case study, focusing on the elite and media framing of this event in order to examine the interaction between the political elite and the mass public in three Western democracies—France, Italy, and the US—during the early and on-going stages of the military crisis. The book analyzes whether and, potentially, the extent to which decision-makers tracked and responded to public opinion in presenting their foreign policy choices. It examines the strategies and approaches that governments potentially adopted to influence public opinion towards either the need for or the lack of need for a military intervention. By representing the framing paradigm as a cycle, Olmastroni shows how each actor within the system (i.e., government and other elites, news media, and public opinion) is linked to the others and contributes to the final representation of an issue. In contrast with other theoretical perspectives of framing, this book states that the framing influence does not only proceed from the government to the public, but it often moves at the same level of the system, with each actor playing different roles. Olmastroni’s insights on framing are significant for researchers in international relations, political communication, public opinion, comparative politics, and political psychology, as well as policy analysts, journalists, and commentators.
Thank you for visiting our website. Would you like to provide feedback on how we could improve your experience?
This site does not use any third party cookies with one exception — it uses cookies from Google to deliver its services and to analyze traffic.Learn More.