Dynamic powertrain design for electric vehicle based on consumption and cost
1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China; 2. Nanjing IVECO Automobile Co., Ltd., Nanjing, Jiangsu 210028, China
Abstract：To achieve the optimal design of powertrain for electric vehicles (EVs), the consumption and cost of EVs with one-speed, two-speed and three-speed transmission system were analyzed and compared. A finite-element-based method was proposed to generate torque-speed curves and efficiency maps of electric motors rapidly, and a motor database with more than two thousand motors was built based on the method. The speed ratio of each motor in database was optimized, and a cost model was built to estimate the total cost for powertrain. The results show that compared with the EVs with one-speed transmission, the consumption of EVs with two-speed transmission is decreased by 2%-10% in average, and the cost is decreased by 1%-4%. Compared with the two-speed type, the EVs with three-speed transmission has slight decrease of less than 4%, while the cost may be even increased. The EVs with two-speed transmission is practically best in a balanced view, and further increase of speeds can not lead to better solution.
邱立琦, 王良模, 邹小俊, 宋伟, 叶进. 基于能耗和成本的纯电动汽车传动系统参数匹配[J]. 江苏大学学报（自然科学版）, 2019, 40(1): 16-21.
QIU Li-Qi, WANG Liang-Mo, ZOU Xiao-Jun, SONG Wei, YE Jin. Dynamic powertrain design for electric vehicle based on consumption and cost[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2019, 40(1): 16-21.
2019, Vol. 40 
