Accurate Modeling of a Flywheel Motor Considering Vehicle Start-Up Driving Conditions

The eccentricity type for flywheel motors under vehicle start-up driving conditions is very unique. It is difficult to characterize the air-gap function geometrically. Therefore, the existing methods cannot be used to solve the problem of accurate motor modeling in this case. To solve this problem, an accurate modeling method for flywheel motors considering vehicle start-up driving conditions is proposed in this study. First, the model is divided into two submodules corresponding to two different vehicle start-up driving conditions. Then, the change law for the flywheel motor air gap under vehicle start-up driving conditions is analyzed and summarized by using the curve fitting method. Subsequently, the predictive air-gap function is obtained, and an accurate flywheel motor model is established. Finally, accelerating and turning experiments are conducted, and good experimental results are obtained that show that a model adopting the proposed modeling method has high accuracy.