The invention relates to an electronic diagnostic method for an electric drive train of an electric or hybrid motor vehicle, comprising a battery (10), an electric machine (M), an inverter (20) connected between the battery (10) and the electric machine (M), and a link capacitor (C20) connected in parallel between the battery (10) and the inverter (20), the diagnostic method comprises the following steps: i) continuously controlling (E2) an increase in the control frequency of the electric machine (M); ii) determining (E4) a change in a Fourier transform of a change in current between components comprising the battery (10) and the link capacitor (C20) and between the inverter (20); iii) for each control frequency: 1) detecting (E5) an anomaly; 2) otherwise, determining (E6) when the control frequency value is optimal.
本发明涉及一种用于电动或混合动力机动车辆的电动传动链的电子诊断方法,该传动链包括电池(10)、电机(M)、连接在电池(10)与电机(M)之间的逆变器(20)、以及并联连接在电池(10)与逆变器(20)之间的链路电容器(C20),该诊断方法包括以下步骤:i)连续控制(E2)电机(M)的控制频率的增加;ii)确定(E4)包括电池(10)和链路电容器(C20)的组件之间与逆变器(20)之间的电流变化的傅里叶变换的变化;iii)对于每个控制频率:1)检测到(E5)异常;2)否则,确定(E6)何时所述控制频率值为最佳的。
Electronic diagnostic method for electric drive train of motor vehicle
用于机动车辆的电动传动链的电子诊断方法
2024-11-15
Patent
Electronic Resource
Chinese
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