tailieunhanh - DESIGN OF ROTATING ELECTRICAL MACHINES

Electrical machines are almost entirely used in producing electricity, and there are very few electricity-producing processes where rotating machines are not used. In such processes, at least auxiliary motors are usually needed. In distributed energy systems, new machine types play a considerable role: for instance, the era of permanent magnet machines has now commenced. About half of all electricity produced globally is used in electric motors, and the share of accurately controlled motor drives applications is increasing. Electrical drives provide probably the best control properties for a wide variety of processes. The torque of an electric motor may be controlled accurately, and the efficiencies of the power electronic. | Design of Rotating Electrical Machines HrtoKOvJ WILEY DESIGN OF ROTATING ELECTRICAL MACHINES Design of Rotating Electrical Machines Juha Pyrhonen Tapani Jokinen and Valeria Hrabovcova 2008 John Wiley Sons Ltd. ISBN 978-0-470-69516-6 DESIGN OF ROTATING ELECTRICAL MACHINES Juha Pyrhonen Department of Electrical Engineering Lappeenranta University of Technology Finland Tapani Jokinen Department of Electrical Engineering Helsinki University of Technology Finland Valeria Hrabovcova Department of Power Electrical Systems Faculty of Electrical Engineering University ofZilina Slovak Republic Translated by Hanna Niemela Department of Electrical Engineering Lappeenranta University of Technology Finland John Wiley Sons .