A Thermal Modeling Approach and Experimental Validation for an Oil Spray-Cooled Hairpin Winding Machine

While the electromagnetic aspects of hairpin windings are actively being investigated and discussed in recent literature, including design rules together with loss calculation reduction techniques, thermal performance modeling have received less attention to date. In windings, conductors (pins) comparatively larger arranged as separate components parallel within slot. contrast, randomly overlap contact each other for traditional random windings. The differences aforementioned winding physical characteristics result a different methodology develop network. This article presents 3-D lumped parameter network (LPTN) approach an oil-spray cooled winding, which includes slot model configuration, end-winding connections, methodologies analyzing sprayed oil characteristics. aforesaid captures unique features related technology cooling mechanism, such nonuniform temperature caused by uneven effects. Finally, taking existing propulsion drive stator bespoke-designed test setup, presented steady-state is experimentally validated covering various experimental tests, spray conditions.