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수냉식 분포권 모터의 사이즈 설계를 위한 손실밀도와 코일 온도의 상관관계 분석
김용호(YongHo Kim),유주성(JuSeong Yu),채승희(SeungHee Chai),박형근(HyeongGeun Park) 한국자동차공학회 2017 한국자동차공학회 부문종합 학술대회 Vol.2017 No.5
This paper presents improved method for analyze correlation of loss density and coil temperature for a motor size design. Because the current density is unable to reflect on laminating direction of the motor, the conventional method to estimate the temperature of the motor coil considering input current density is limited. The improved method which considers the lamination length and the amount of loss can reflect the cooling phenomenon of the motor. Thus, it can increase the prediction curacy of the coil temperature. In this paper, the heating and cooling characteristics are made into a numerical formula using the heat equivalent circuit. After then, the loss produced by the coil is divided into the flow channel to the cooling system so that the loss per cooling area can be determined to predict the temperature. The performances of the improved method are analyzed and compared with those of the conventional method. Lastly, the result of the both method are compared with the experimental results to verify the validity of the proposed design process.