2022
DOI: 10.3390/en15218189
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Perspective of Thermal Analysis and Management for Permanent Magnet Machines, with Particular Reference to Hotspot Temperatures

Abstract: Permanent magnet (PM) machines have been extensively used for various applications. Nevertheless, thermal effect, particularly hotspot temperature, not only severely restricts power/torque density but also leads to deteriorations in electromagnetic performance, service life, and reliability. Starting with foundations of PM machines and heat transfer mechanisms, this paper reviews the development of thermal analysis methods over the last thirty years and the state-of-the-art research achievements, and the hotsp… Show more

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Cited by 14 publications
(10 citation statements)
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“…In terms of internal convection heat transfer within end space, it has been extensively investigated [9], [14], and [23]. The CHTCs of the end surfaces of the PM ℎ , the endwinding (EW) ℎ , the stator core (SC) ℎ , the end-plate (EP) ℎ , as well as the heat transfer path of airgap (AG) ℎ , can be calculated as [6]: where 𝑣 and 𝐿 are the peripheral speed of the rotor and the airgap length, respectively. 𝑁𝑢 is the Nusselt number within airgap region and determined by the Taylor or modified Taylor number [9].…”
Section: A Chtcs Under Different Cooling Conditionsmentioning
confidence: 99%
“…In terms of internal convection heat transfer within end space, it has been extensively investigated [9], [14], and [23]. The CHTCs of the end surfaces of the PM ℎ , the endwinding (EW) ℎ , the stator core (SC) ℎ , the end-plate (EP) ℎ , as well as the heat transfer path of airgap (AG) ℎ , can be calculated as [6]: where 𝑣 and 𝐿 are the peripheral speed of the rotor and the airgap length, respectively. 𝑁𝑢 is the Nusselt number within airgap region and determined by the Taylor or modified Taylor number [9].…”
Section: A Chtcs Under Different Cooling Conditionsmentioning
confidence: 99%
“…Schimbător de căldură ceramic printat 3D pentru răcirea unui stator cu înfășurări concentrate [4]  Grosimea pereților: 0,8 mm Conductor electric Litz cu tub de oțel încorporat pentru circuitul de răcire (motor de 205 kW, 6000 rpm) Canale de răcire forțată indirectă cu lichid dispuse în arborii mașinilor sincrone cu magneți permanenți [2]  Răcire recomandată pentru reducerea temperaturii magneților permanenți. Forțele centrifuge avorizează disiparea căldurii: a) Răcire directă; b) Răcire cu recirculare (are un coeficient de transfer a căldurii mai bun).…”
unclassified
“…Forțele centrifuge avorizează disiparea căldurii: a) Răcire directă; b) Răcire cu recirculare (are un coeficient de transfer a căldurii mai bun). Circuit de răcire forțată directă cu lichid la mașinile sincrone cu magneți permanenți [2]  Cu imersia statorului (uleiul înlocuiește aerul pentru un transfer de căldură superior) Rotorul poate fi și el imersat în ulei.…”
unclassified
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