Abstract: The inverter comprises input terminals (IT+, IT?), output terminals (OT), controllable switches (Q, Q?) connected to the input terminals (IT+, IT?) and to the output terminals (OT), and a control device (116) configured to control the controllable switches (Q, Q?) such that the controllable switches (Q, Q?) convert a DC voltage (E) at the input terminals (IT+, IT?) into an AC voltage at the output terminals (OT) intended to drive an electric motor (108), the control device (116) being configured to control the controllable switches (Q, O?) according to a first switching frequency and, in response to a temperature (Tj, Tc) of an element (118, Q) of the inverter (110), to a second switching frequency, the control device (116) being configured to determine the second switching frequency according to an operating point of the motor (108).

Abstract: The inverter (110) comprises input terminals (IT+, IT?), output terminals (OT), controllable switches (Q, Q?) connected to the input terminals (IT+, IT?) and to the output terminals (OT) and a control device (116) configured to control the controllable switches (Q, Q?) so as to convert a DC voltage at the input terminals (IT+, IT?) into an AC voltage at the output terminals (OT) intended to drive an asynchronous electric motor (108) to achieve a target torque (T*), selectively: in a first mode of operation in which the target torque (T*) is determined according to a torque determination method, and in response to a rotor temperature (Tr), in a second mode of operation in which losses in the rotor are decreased relative to the first mode of operation while the target torque (T*) remains determined according to the torque determination method of the first mode of operation.

Abstract: An inverter having input terminals, output terminals, a DC link capacitor connected to the input terminals and configured to smooth a DC voltage present at the input terminals is disclosed. Controllable switches are connected to the DC link capacitor and to the output terminals, and a control device is also provided. The control device controls the controllable switches such that the controllable switches convert the DC voltage into an AC voltage at the output terminals. The controllable switches are controlled according to a first switching control scheme including a first modulation technique and a first switching frequency, and according to a second switching control scheme in response to a temperature of the DC link capacitor, the second switching control scheme causing less losses in the DC link capacitor than the first switching control scheme.

Abstract: The inverter (110) comprises input terminals (IT+, IT?), output terminals (OT), controllable switches (Q, Q?) connected to the input terminals (IT+, IT?) and to the output terminals (OT) and a control device (116) configured to control the controllable switches (Q, Q?) so as to convert a DC voltage at the input terminals (IT+, IT?) into an AC voltage at the output terminals (OT) intended to drive an asynchronous electric motor (108) to achieve a target torque (T*), selectively: in a first mode of operation in which the target torque (T*) is determined according to a torque determination method, and in response to a rotor temperature (Tr), in a second mode of operation in which losses in the rotor are decreased relative to the first mode of operation while the target torque (T*) remains determined according to the torque determination method of the first mode of operation.

Abstract: A method and an arrangement monitor a brake system of a brake arrangement of a rail vehicle. To carry out such a method comparatively cost-effectively and gently on the wheels and rails, the deceleration of the rail vehicle is detected with a deceleration measured variable being obtained and the frictional connection between the wheel and rail is detected with a frictional connection measured variable being obtained. In the event of a small deceleration measured variable and a normal frictional connection measured variable, an error message signal is generated. In a brake system with at least one brake actuator, the deceleration of the rail vehicle is detected with a deceleration measured variable being obtained and the brake force of the at least one brake actuator is measured. In the case of a small deceleration measured variable and a low brake force, an error message signal is generated.

Abstract: A method and an arrangement monitor a brake system of a brake arrangement of a rail vehicle. To carry out such a method comparatively cost-effectively and gently on the wheels and rails, the deceleration of the rail vehicle is detected with a deceleration measured variable being obtained and the frictional connection between the wheel and rail is detected with a frictional connection measured variable being obtained. In the event of a small deceleration measured variable and a normal frictional connection measured variable, an error message signal is generated. In a brake system with at least one brake actuator, the deceleration of the rail vehicle is detected with a deceleration measured variable being obtained and the brake force of the at least one brake actuator is measured. In the case of a small deceleration measured variable and a low brake force, an error message signal is generated.