طراحي مناسب موتور سنكرون مغناطيس دائم داخلي به منظور افزايش قابليت تضعيف شار و بهبود عملكرد در سرعت بالا

چكيده انگليسي :

100 Interior Permanent Magnet Synchronous Machine Design for Increase Flux weakening Capability and Improve High Speed Operation Alireza Pouramin Aein a pouramin@ec iut ac ir Date of Submission 2009 05 30 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Seyed Mohammad Madani Madani@cc iut ac ir Abstract Interior Permanent Magnet Synchronous Machines IPMSM attracts researcher s attentions due totheir high efficiency high torque and power density Burring permanent magnet inside the rotor coreincreases mechanical robustness of the rotor construction at high speeds compared to the surfacepermanent magnet synchronous machines SPMSM Therefore IPMSM is suitable candidate for high speed applications One of the key desirable properties of IPMSM machines which is essential in manyapplications such as electric vehicles is its good flux weakening capability This property is related to themachines ability to deliver constant power over a wide range of speeds without over sizing the converter orthe machine The aim of this thesis is to design an IPEM motor with higher speed operating capability andbetter flux weakening capability The thesis consists of two parts of rotor shape and stator winding designs In the field of rotor shape design some authors proposed segmented magnet for IPMSM In these motors the iron bridges between PM segments increases d axis inductance Ld which in turn increases the flux weakening capability of the machine However each iron bridge shortens its adjacent PM segments flux which decreases the total magnet s flux m in air gap Decreasing m results in decreasing theelectromagnetic torque This research presents appropriate positions and dimensions of these magnet segmentations and iron bridges to achieve a high d axis inductance while losing minimum permanentmagnet fluxes In the field of stator winding design many authors have used fractional slot concentrated windings inSPMSM in order to improve motor performance at high speeds However it is not common to usefractional slot concentrated windings for IPMSM due to the possible increase of torque pulsation In thesecond part of this thesis a fractional slot is designed for an IPM machine to increase the machineinductance which improves the flux weakening capability of the machine First the concept ofconcentrated windings is introduced Then a detailed analysis is presented which explains the potential offractional slot concentrated winding in IMPSM flux weakening Then the criteria for choosing theoptimum slot pole combination are described An interior PM 12slot 10pole prototype with concentrated windings has been designed Simulationresults verifies that a very wide speed range of constant power operation can be achieved in this methodwhile achieving machines efficiency higher than 90 at high speeds Moreover thorough comparison ofthe different type of IPMSM for wide constant power speed range is presented This comparison includesvarious machines performance indexes Finally it is shown that the presented design method not expandsthe motor constant power speed range but also reduces the torque pulsation in comparison to other designs Keywords Flux weakening Interior permanent magnet synchronous machines Fractional slotconcentrated winding Rotor shape design Segmented magnet

پورامين آئين، عليرضا

طراحي مناسب موتور سنكرون مغناطيس دائم داخلي به منظور افزايش قابليت تضعيف شار و بهبود عملكرد در سرعت بالا

سيم پيچي متمركز شيار كسري , طراحي ساختار روتور , موتور SPM