High Dynamic Torque Measurement System

• Subject Area: Electrical Engineering and Information Technology
• Term: Funded in 2025
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 567117766

In the domain of electromobility, the design of electric drives must prioritise high mechanical speeds. This necessity, along with the importance of understanding torque vibrations and the associated acoustic effects, underscores the criticality of these design considerations and their role as quality features in drive systems. The prevailing requirements for electric drives necessitate further research in this area. The focus of research in this area is on the development of smooth torque curves and the acoustic optimisation of electric drives. This research necessitates the measurement of the forces acting on the electric machine. It is therefore proposed that the procurement of a dynamic torque measurement system be undertaken, with the aim of extending the frequency range and thereby facilitating the response to urgent research questions. In contradistinction to the extant torque measurement equipment with torque measurement shafts, the planned dynamic torque measurement system is not to be mounted between the load machine and the device under test but is to be installed as a mounting plate with integrated sensors between the test machine and the test bench angle. The novel measuring system, which directly records the reaction forces of the electric drive on the mounting plate, exhibits a considerably more rigid coupling to the test bench structure. Moreover, the force measurements are recorded with piezoelectric sensors, thereby opening a significantly higher frequency range. In addition to the dynamic torque around the axis of rotation, radial forces on the motor housing can also be recorded. In addition to the torque transducer in the mounting plate (piezoelectric sensors), there is a requirement for a corresponding power supply, data acquisition platform and software for synchronised data acquisition from the torque transducer. In order to draw conclusions from the generated torque curve to the electrical input signals (current and voltage) of the electrical machine, an 8-channel power analyser consisting of current and voltage channels is also applied. This facilitates synchronous signal recording of the electrical signals and the mechanical torque. The planned research can be used to identify optimisation potential for electric drives. Furthermore, control concepts such as AI-based control approaches can be investigated regarding acoustics.

• DFG Programme: Major Research Instrumentation
• Major Instrumentation: Hochdynamisches Drehmomentmesssystem
• Instrumentation Group: 2600 Elektromotoren
• Applicant Institution: Technische Hochschule Nürnberg Georg Simon Ohm
• Leader: Professor Dr.-Ing. Armin Dietz