Context

The data set comprises several sensor data collected from a typical combined system between an inverter, an induction motor, and a control system, deployed on a test bench. Test bench measurements were collected by the LEA department at Paderborn University.

An inverter is a power electronic component with transistors (read 'switches'), that determine how the battery voltage (so called DC-link voltage) is applied on the three phase circuits of the electric motor. The control unit decides according to some control strategy the current switching states of the inverter at each discrete point in time.

Content

The data set comprises approximately 235 thousand samples in the complete operating range of an exemplary drive system.

Rows follow no particular order.

Inspiration

The most important aspect of an electric vehicle from a marketing and engineering perspective is its efficiency and, thus, achievable range. For this, it is essential to avoid over-dimensioning of the drive train, i.e. applying more and heavier metal packs to increase its thermal capabilities. If the motor is controlled inefficiently through the inverter, there'll be superfluous power losses, i.e. heat build-up, which eventually leads to electric power derating during operation and, crucially, early depletion of the battery.

Precise phase voltage information is mandatory in order to enable an accurate, efficient or high dynamic control performance of electric motor drives, especially if a torque-controlled operation is considered. However, most electrical drives do not measure the phase voltages online due to their cost implications, and, therefore, these have to be estimated by inverter models.

Because of various nonlinear switching effects partly at nanosecond scale, an analytical white-box modeling approach is hardly feasible in a control context. Hence, data-driven inverter models seem favorable for this purpose.

Since the control utilizes pulse width modulation (PWM), the mean phase voltages for each PWM interval are the targets of the inverter models.

Detailed description

A comprehensive description of the data set can be found in the following paper (freely available): Data Set Description: Three-Phase IGBT Two-Level Inverter for Electrical Drives DOI: 10.13140/RG.2.2.23335.37280

Acknowledgements

This work was funded by the German Research Foundation (DFG) under the reference number 389029890.

Links

Department of Power Electronics and Electrical Drives, Paderborn University, Germany