End-winding module-based cooling method for stator-excitation brushless machines
To enhance the cooling capability of the stator-excitation brushless machines,an end-winding mod-ule-based cooling method was proposed.An end-winding cooling(EWC)module was inserted into the gap between the end-winding and the end-of-stator laminations of machines.The end-winding cooling capability can be improved due to the reduced distance between the hot-spot of stator winding and the coolant.The cal-culation model of the winding length for non-overlapping concentrated winding was improved to evaluate the change of the stator armature winding length before and after adopting the EWC module.The effects of the conductivity of the EWC module on the machine stator losses were investigated.The cooling performance of the EWC module under different copper consumption and excitation source loss densities was compared using the computational fluid dynamics(CFD)model.The results show that the hot-spot temperature rise of the end-winding reduces by approximately 50％and the hot-state resistance on the armature winding decreases by 7.51％using the proposed EWC module.The cooling conditions of the whole stator is improved.
万方数据
维普
