Abstract: A method is disclosed for preventing a power reduction in an electric drive system of a vehicle (3) during a journey of the vehicle. The method includes a component-tempering process (P2) in which at least one component (4, 5, 6) of the electric drive system is tempered, such that the method comprises a power reduction prediction process (P1) in which it is checked whether a power reduction is to be expected during a journey. The component-tempering process (P2) is initiated as soon as the power reduction prediction process (P1) has recognized that a power reduction is to be expected during the journey.

Abstract: A method for downward-regulating an electric motor (15) comprises a weighting factor-determination process (P2) in which weighting factor values (4) are determined continuously, an integration process (P3) in which the weighting factor values (4) are added so that an integration value (5) is formed, and a downward-regulation process (P4) in which the electric motor (15) is regulated if the integration value (5) is above a threshold value (6).

Abstract: A method is disclosed for preventing a power reduction in an electric drive system of a vehicle (3) during a journey of the vehicle. The method includes a component-tempering process (P2) in which at least one component (4, 5, 6) of the electric drive system is tempered, such that the method comprises a power reduction prediction process (P1) in which it is checked whether a power reduction is to be expected during a journey. The component-tempering process (P2) is initiated as soon as the power reduction prediction process (P1) has recognized that a power reduction is to be expected during the journey.

Abstract: Disclosed is a method (1) for limiting (3) a power of an electric motor (2), the method (1) including an estimation process (P1) in which a loading of the electric motor (2) is estimated.

Abstract: Disclosed is a method for determining a rotor temperature value TRot for an electric machine, such as an electric motor. In one example, the method includes calculating a support value Pcu2_Trot using a rotor temperature value Trot that is determined with a temperature model and a motor current value Isdq. An auxiliary value Pcu2_Ref can be determined using a motor torque Trq and a motor slip value ?slip. The support value Pcu2_Trot can be linked with the auxiliary value Pcu2_Ref in order to obtain a corrected rotor temperature value DeltaTrot. Furthermore, the temperature model can be modified using the corrected rotor temperature value DeltaTrot in order to obtain a corrected temperature model. Finally, the rotor temperature value TRot can be determined using the corrected temperature model.

Abstract: Disclosed is a method for determining a rotor temperature value TRot for an electric machine, such as an electric motor. In one example, the method includes calculating a support value Pcu2_Trot using a rotor temperature value Trot that is determined with a temperature model and a motor current value Isdq. An auxiliary value Pcu2_Ref can be determined using a motor torque Trq and a motor slip value ?slip. The support value Pcu2_Trot can be linked with the auxiliary value Pcu2_Ref in order to obtain a corrected rotor temperature value DeltaTrot. Furthermore, the temperature model can be modified using the corrected rotor temperature value DeltaTrot in order to obtain a corrected temperature model. Finally, the rotor temperature value TRot can be determined using the corrected temperature model.