Recent Developments of Electrical Drives - Part 45. The book stating the recent developments of electrical drives, can be useful for engineers and researchers investigating and designing electrical and electronic devices as well as for students and young researchers dealing with electrical and electronic engineering, computer sciences (advanced computer modelling, sophisticated control systems with artificial intelligence tools applied, optimal design bye use of classical and genetic algorithms employed), applied mathematics and all the topics where electromagnetic, thermal, mechanical phenomena occur | . ADVANCED MATERIALS FOR HIGH SPEED MOTOR DRIVES G. Kalokiris A. Kladas and J. Tegopoulos Faculty of Electrical and Computer Engineering National Technical University of Athens 9 Iroon Polytechneiou Street 15780 Athens Greece tegopoul@power Abstract. The paper presents electrical machine design considerations introduced by exploiting new magnetic material characteristics. The materials considered are amorphous alloy ribbons as well as neodymium alloy permanent magnets involving very low eddy current losses. Such advance materials enable electric machine operation at higher frequencies compared with the standard iron laminations used in the traditional magnetic circuit construction and provide better efficiently. Introduction The impact of innovative materials on the electrical machine design is very important. The advantages involved in machine efficiency and performance are important as mentioned in 1 2 . These materials enable electric machine operation at high frequencies when supplied by inverters compared to the standard iron laminations used in the traditional magnetic circuit construction. The features and performance characteristics are analyzed by using field calculations and tested by measurements. In this paper the study of asynchronous and permanent magnet machines based on such materials is undertaken. Low losses and high volumic power associated with high speed and converter machine operation are the main advantages of such applications 3-5 . Design procedure The proposed machine design procedure involves two steps. In a first step standard design methodology is used for preliminary design. In a second step the method of finite elements is implemented to calculate the machine efficiency and performance. Finally a prototype is constructed in order to validate and compare the simulated machine characteristics to the corresponding experimental results 6 7 . The method of finite elements is based on a discretization of the solution .
