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3．4磁场削弱时，机车特性的计算前面我们已经计算了最深磁场削弱时的牵引特性，计算时所用的电动机的转短和转速是由电机设计提供的．现在我们要讨论，如果知道额定电压、固定分路时的电机特性，怎样计算某一磁场削弱系数的机车特性。3．4．1磁场削弱级的选择我们希望从一级磁
3.4 Calculation of locomotive characteristics when the magnetic field is weakened We have previously calculated the traction characteristics when the deepest magnetic field is weakened. The motor shortening and speed used in the calculation are provided by the motor design. Now we will discuss how to calculate the locomotive characteristics of a certain field weakening coefficient if we know the rated voltage, the characteristics of the motor at fixed shunting. 3.4.1 Weakened magnetic field level selection We hope from the magnetic level