The invention relates to a method for estimating a torque of an electric machine (1), the method comprising the steps of: estimating a first torque (M1) by a cross-product formed from an estimated magnetic flux of the electric machine (1) and an actual current of the electric machine (1) using a first method; estimating a second torque (M2) using a second method by determining a power balance that can be calculated by means of a difference between an AC output power of an inverter (2) connected to the electric machine (1) and a total power loss of the electric machine (1); and determining the final torque (Mfin) as a weighted average of the first torque (M1) weighted with the first weight and the second torque (M2) weighted with the second weight. The invention also relates to a control unit (4) for carrying out the method and to an electric traction drive (3) having such a control unit (12).
本发明涉及一种用于估算电机(1)的扭矩的方法,所述方法包括以下步骤:使用第一方法通过由所述电机(1)的估算的磁通量和所述电机(1)的实际电流形成的叉积来估算第一扭矩(M1);使用第二方法通过确定功率平衡来估算第二扭矩(M2),所述功率平衡可以借助于连接至所述电机(1)的逆变器(2)的AC输出功率与所述电机(1)的总功率损耗之间的差来计算;以及将最终扭矩(M_fin)确定为利用第一权重加权的第一扭矩(M1)和利用第二权重加权的第二扭矩(M2)的加权平均值。本发明还涉及一种用于执行该方法的控制单元(4)和一种具有这种控制单元(12)的电动牵引驱动装置(3)。
Estimation of motor torque
电机扭矩的估算
2024-01-26
Patent
Electronic Resource
Chinese
IPC: | H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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