반응표면분석법을 이용한 자계누설 최소화 설계

Abstract

초록:본논문에서는무전기에사용되는마이크로스피커의누설자속을최소화하는설계에초점을맞추었다. 진동판표면으로누설되는자속을저감시키고전자기력을향상시키기위한최적설계로반응표면법을적용하였다. 최적설계의목적함수는전자기력과누설자속이며, 폴피스두께, 마그넷그레이드, 요크두께의세가지변수에의해결정되어진다. 전자기력과누설자속은반응표면법으로각조건에서계산되었고, 평가된결과에의해최적화되었다. 폴피스두께0.9 mm, 마그넷그레이드N42H, 요크두께0.75mm 일때, 전자기력은초기모델과동등한수준을만족하였고, 자속누설량은11.8% 저감되었다.Abstract: This paper focuses on the design of microspeakers with minimum flux leakage, for use inradiotelegraphy. The response surface methodology (RSM) is applied as the optimization technique forobtaining a large magnetic force and a small flux leakage on diaphragm. The object functions of thisoptimization are the magnetic force and the flux leakage along three factors; pole piece thickness, magnetgrade and yoke thickness, which are determined by the design of the experiment. The magnetic force and theflux leakage are calculated for each condition and optimized by results evaluated with RSM. For a pole piecethickness of 0.9 mm, a magnet grade of N42H and a yoke thickness of 0.75 mm, the magnetic force issatisfied as initial model and flux leakage is decreased to 11.8% than initial model.