By Gianmario Pellegrino, Thomas M. Jahns, Nicola Bianchi, Wen L. Soong, Francesco Cupertino
This e-book bargains a vital compendium at the research and layout of synchronous cars for variable-speed purposes. targeting synchronous reluctance and ferrite permanent-magnet (PM) synchronous reluctance machines, it offers a vast standpoint on three-phase machines for variable velocity functions, a box at the moment ruled through asynchronous machines and rare-earth PM synchronous machines. It additionally describes synchronous reluctance machines and PM machines with no rare-earth fabrics, evaluating them to state of the art options. The e-book offers readers with large details on and finite point versions of PM synchronous machines, together with all correct 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 combos suggestions, and a quantitative, normalized comparability of torque strength with benchmark PM machines. The e-book discusses a wealth of strategies for selecting laptop parameters, with an emphasis on self-commissioning algorithms, and offers equipment for computerized computing device layout and optimization, together with a software program instrument constructed for this objective. Addressing a major hole within the box of PM-less and less-PM electric machines, it's meant as a self-contained reference advisor for either graduate scholars computing device designers, and as an invaluable textual content for college classes on computerized and/or optimized layout of electric machines and drives.
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Additional resources for The Rediscovery of Synchronous Reluctance and Ferrite Permanent Magnet Motors: Tutorial Course Notes
It has been also shown that a reduction of the torque ripple can be achieved by means of a suitable choice of the number of flux–barriers with respect to the number of stator slots. In this case the flux–barrier ends are uniformly distributed along the 13 Torque [Nm] (b) 13 Torque [Nm] (a) 12 11 0 12 11 90 180 θ [degrees] m 270 360 0 90 180 θ [degrees] 270 360 m Fig. 23 Measured torque versus mechanical position of REL motor with and without rotor skewing. The motors are tested at rated current.
The second is a low permeability path, see Fig. 2c, since the flux lines have to cross the rotor flux barriers. It is commonly referred to as the q-axis path. The ﬁnal dq reference frame is shown in Fig. 2d. The rotor is designed with several flux barriers, in order to obstacle the flux along the q-axis and to achieve a high saliency ratio, that is, a high reluctance torque component. This has been presented in Chap. 1. However, iron bridges remain (at the ends and sometimes in the middle of each barrier) to mechanically sustain the rotor parts.
In: Proceedings of International Conference Electrical Machines (ICEM), Rome, 1–6 2010 21. : Power capability of salient pole permanent magnet synchronous motors in variable speed drive applications. IEEE Trans. Ind. Appl. 26(1), 115–123 (1990) 22. : Fractional-slot concentrated-winding synchronous permanent magnet machines: opportunities and challenges. IEEE Trans. on Ind. Electro. 57(1), 107–121 (2010) 23. : Optimal flux weakening in surface PM machines with fractional-slot concentrated windings.