Intelligent electric actuator

Project goal

In order to achieve more efficient, more precise control and consequently also better utilization of actuators, the previously used V/f control is to be changed to field-oriented control of the drives, which are designed as asynchronous machines.

As the performance of the control system depends heavily on precise knowledge of the electrical equivalent circuit diagram parameters of the drive machine used, the relevant parameters must first be identified automatically. The limitation that the drives are already in the installed state during the measurement and therefore require torque-free identification is an additional requirement for the identification algorithms to be developed. Due to the desired high magnetic utilization of the machines, the non-linearities of individual parameters caused by saturation must also be taken into account during identification.

Due to the limited installation space, the rotor speed should not be recorded by a speed sensor, which is necessary for field-oriented control. Instead, this is to be estimated using measurable system variables. The estimation and observer structures used for this purpose should provide a robust estimate of the rotor speed up to the lowest possible speeds.

The client and industrial partner is AUMA Riester GmbH & Co. KG.

Project duration

December 2024 bis April 2027