Optimizing cogging torque reduction in slot opening shift method for BLDC motor by RSM

Author

Abbaszadeh, Karim ; Jafari, Mostafa

Author_Institution

Khajeh Nasir Univ. of Technol., Tehran, Iran

fYear

2011

fDate

16-17 Feb. 2011

Firstpage

62

Lastpage

66

Abstract

The main target of this paper is optimizing the slot-opening shift for cogging torque reduction in BLDC motors. In a slot-opening shift method there is no skew, therefore the known drawbacks of the skewing is prevented. In the first part of the paper the slot-opening shift method for a BLDC motor is discussed. In this case, it is desired to find a method for cogging torque reduction without deteriorating the trapezoidal shape of back- EMF. In the second part optimization of this method is discussed. In this case, it´s tried to optimize the amount of shifts in slot opening for maximum reduction in cogging torque. Response surface Method (RSM) which is a branch or Design of Experiments (DOE) is used as optimization Method. The simulation result by finite element shows a considerable reduction in the cogging torque of the optimized motor. Moreover the simulation verifies the quality of back-EMF shape in each case.

Keywords

brushless DC motors; design of experiments; electric potential; finite element analysis; optimisation; response surface methodology; BLDC motor; DOE; RSM; back-EMF; cogging torque reduction; design of experiments; finite element methods; optimization Method; response surface method; slot opening shift method; Forging; Optimization; Permanent magnet motors; Reluctance motors; Shape; Stators; Torque; BLDC Motors; DOE; Finite Element Methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics, Drive Systems and Technologies Conference (PEDSTC), 2011 2nd

Conference_Location

Tehran

Print_ISBN

978-1-61284-422-0

Type

conf

DOI

10.1109/PEDSTC.2011.5742496

Filename

5742496