Title :
Analytical prediction of rotor eddy current loss in brushless machines equipped with surface-mounted permanent magnets. II. Accounting for eddy current reaction field
Author :
Zhu, Z.Q. ; Ng, Kung Bo ; Schofield, Nigel ; Howe, David
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Sheffield
Abstract :
For pt.I see ibid., p.806-9 (2001). An improved analytical model for predicting the rotor eddy current loss in brushless motors equipped with surface-mounted permanent magnets, with due account of the eddy current reaction field, is presented. The model is applied to a brushless DC traction machine, and the predicted rotor loss is compared with the losses deduced from thermometric measurements and from the magnetostatic analytical model. Improved agreement between the predicted and measured rotor loss is achieved over the complete operating speed range
Keywords :
brushless DC motors; eddy current losses; magnetic fields; permanent magnet motors; rotors; traction motors; brushless DC traction machine; brushless machines; eddy current reaction field; magnetostatic analytical model; rotor eddy current loss; surface-mounted permanent magnets; thermometric measurements; time-varying magnetic field distribution; Analytical models; Brushless motors; Eddy currents; Loss measurement; Magnetic analysis; Magnetic field measurement; Magnetostatics; Predictive models; Rotors; Velocity measurement;
Conference_Titel :
Electrical Machines and Systems, 2001. ICEMS 2001. Proceedings of the Fifth International Conference on
Conference_Location :
Shenyang
Print_ISBN :
7-5062-5115-9
DOI :
10.1109/ICEMS.2001.971800
