A new design of synchronous reluctance motor with segment-shaped outer rotor is presented and investigated in this paper. In order to obtain correct recommendations for optimal design of the studied synchronous reluctance motor, analytical relations of motor electromagnetic parameters and geometrical dimensions (also known as metamodels) have been synthesized. Electromagnetic parameters, which have been used for metamodels synthesis, are obtained by means of magnetostatic field numerical calculations with finite element method using software QuickField.
The paper includes the analysis of the studied synchronous reluctance motor geometrical parameters (stator outer diameter, height and overlap angle of rotor’s segment-shaped packages) influence on the electromagnetic torque per unit volume. Testing of synthesized metamodels shows that relative difference between the results obtained by numerical calculations and those obtained with the help of synthesized metamodels does not exceed eight percent at experimental points and intermediate points as well. The proposed optimal design of the segment-shaped outerrotor synchronous reluctance motor obtained with the help of synthesized metamodels has been compared with a salient-pole outer-rotor synchronous reluctance motor having ferromagnetic yoke with the same value of the electromagnetic torque. The comparison results of both motors show that the highest value of electromagnetic torque per unit volume can be achieved with the proposed new design of the synchronous reluctance motor with segment-shaped outer rotor.
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 I. Boldea Reluctance Synchronous Machines and Drives USA: Oxford University Press 1996.
 T. J. E. Miller Switched Reluctance Motors and their Control Magna Physics Publishing and Oxford University Press London 1993.
 R. Krishman Switched reluctance motor drives modeling simulation analysis design and applications CRC Press Washington 2001.
 K. Nakamura Y. Suzuki H. Goto and O. Ichinokura Design of outerrotor type multipolar SR motor for electric vehicle Proceedings of the Joint European Magnetic Symposia (JEMS’04) vol. 290-291 pp. 787-794 April 2005.
 J. Dirba N. Levin S. Orlova and V. Pugachev Brushless Synchronous Motors for Appliances and Power Tools Proceedings of the 6th International Conference on Electrical and Control Technologies (ECT2011) Lithuania Kaunas pp. 222-225 May 2011.
 V. Pugachev J. Dirba L. Kukjane N. Levin and S. Orlova “Synchronous Reluctance motor” Patent of the Republic of Latvia LV 14418 B Jan. 20 2012 (in Latvian).
 M. M. Protodyakonov R. I. Teder Method of the experiments rational design Moscow Russia: Science 1973 (in Russian).
 A. Janushevskis J. Auzinsh Design and analysis of experiments Riga Latvia: RTU 2007 (in Latvian)
 QuickField. Finite Element Analysis System. Version 5.7. User’s Guide. Denmark: Tera Analysis 2010.
 L. Lavrinovicha J. Dirba N. Lavrinovich Magnetostatic analysis of surface-mounted permanent magnet motor with external rotor for use in electric hand planer. Electric Power Engineering (EPE) Conf. Kouty nad Desnou Chech Republic 2013.
 N. Bianchi Electrical Machine Analysis Using Finite Elements CRC Press Boca Raton FL Taylor & Francis 2005.
 V. O. Eglays Aproximation of the tabular data by means of the polynomial functions regression Problems of the dynamic and strength. Riga 1981 Nr 36. (in Russian).
 O. Onzevs I. Tihenko N. Povetkina and J. Dirba. Electronic Motors: Optimization Problems. Latvian Journal of Physics and Technical Science Nr 3 Riga Latvia: Prese 1997 pp. 71-76.
 O. Onzevs J.Dirba I. Tihenko Methodology for Visual Estimation of Electronically Commutated Motors. Latvian Journal of Physics and Technical Science Riga Latvia Nr 3. ISSN 0868-8257 1998 pp. 32-37.
 J. Dirba Special mode of synchronous machines Riga Latvia: RTU 1997 (in Latvian).
 J. Dirba L. Lavrinovicha L. Levin V. Pugachev Application of Synchronous Brushless Motors in Electric Hand Tools Latvia Journal of Physics and Technical Science Volume 49 Issue 1 pp. 29-34 ISSN 0868-8257 Riga Latvia March 2012  Introduction to optimization with the Excel Solver tool Microsoft Home page. [Online]. Available: http://office.microsoft.com [Accessed: May. 12 2013].