Title :
Thermal Optimization of a High-Speed Permanent Magnet Motor
Author :
Jianning Dong ; Yunkai Huang ; Long Jin ; Heyun Lin ; Hui Yang
Author_Institution :
Sch. of Electr. Eng., Southeast Univ., Nanjing, China
Abstract :
This paper investigates the losses of a high-speed permanent magnet motor. The iron losses are calculated by a model that can consider the skin effect and rotational loss. The rotor eddy current losses are estimated by a fast hybrid method that can consider the end effect. Pulse-width modulation (PWM) harmonics brought by the voltage source inverter (VSI) are considered in the loss calculations. Then the temperature distribution of the motor is evaluated by using the calculated loss results and computational fluid dynamic (CFD) modeling. Finally, based on the CFD results, the motor structure is optimized to achieve better rotor cooling. The outer slots are closed to force the cooling air flow through the rotor surface. Calculated temperature distributions and optimization results are verified by measurements.
Keywords :
PWM invertors; computational fluid dynamics; eddy current losses; permanent magnet motors; rotors; skin effect; temperature distribution; thermal analysis; CFD; PWM harmonics; VSI; air flow cooling; computational fluid dynamic modelling; fast hybrid method; high-speed permanent magnet motor; iron losses; motor structure; outer slots; pulse-width modulation harmonics; rotational loss; rotor cooling; rotor eddy current losses; rotor surface; skin effect; temperature distribution; thermal analysis; thermal optimization; voltage source inverter; Computational fluid dynamics; Cooling; Eddy currents; Iron; Permanent magnet motors; Rotors; Temperature measurement; Computational fluid dynamic (CFD); eddy current loss; finite-element method (FEM); high-speed permanent magnet motor; iron loss; skin effect; thermal analysis;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2013.2285017
