Determination of the road load on electric two-wheelers using the torque-current relationship of the drive motor

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• 作者：Dae Kyung Kang ; Min Soo Kim
• 关键词：Coastdown ; E ; bike ; Electric vehicle ; Motor dynamometer ; Motor torque constant ; Road load
• 刊名：Journal of Mechanical Science and Technology
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：30
• 期：9
• 页码：4023-4029
• 全文大小：1,077 KB
• 刊物类别：Engineering
• 刊物主题：Mechanical Engineering
  Structural Mechanics
  Control Engineering
  Industrial and Production Engineering
  
• 出版者：The Korean Society of Mechanical Engineers
• ISSN：1976-3824
• 卷排序：30

文摘

We propose a new drive performance test method to measure the road load of e-bikes driven by in-wheel brushless DC (BLDC) motors during a road drive. This method is quite different from the commonly used coastdown test. In our proposed method, speed and road load were correlated by fitting the speed and current consumption of the motor when driving at constant speed on a uniform horizontal road. The method was tested by riding an e-bike on a real road. The torque and the current with torque constant of the in-wheel motor of the e-bike were linearly related. We also conducted a coastdown test on the same road. By comparing the experimental results of the two field tests, the applicability of our new method was verified. Based on these results, we conclude that the proposed method can be used to measure the road load of the e-bike, including its rolling and aerodynamic resistances, satisfactorily.