Fault-Tolerant Regenerative Sensorless Braking of PMAC MotorsEnables Degraded Mode of Operation for Functional Safety
Conference: PCIM Europe 2022 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/10/2022 - 05/12/2022 at Nürnberg, Germany
doi:10.30420/565822273
Proceedings: PCIM Europe 2022
Pages: 8Language: englishTyp: PDF
Authors:
Schmidt, Tobias; Krah, Jens Onno (TH Köln, Cologne, Germany)
Heinzelmann, Freddy (SEW Eurodrive, Bruchsal, Germany)
Holtz, Joachim (University of Wuppertal, Wuppertal, Germany)
Abstract:
A method is described that immediately decelerates a running machine applying electromagnetic torque to fulfill the safety function Safe Stop (SS1). It relieves the motor integrated mechanical holding brake and thus reduces wear and tear. In this way, fault-tolerant sensorless parameter-independent emergency stopping of permanent magnet alternating current (PMAC) motors is achieved. The controlling algorithm in the safety-related logic overrides failures of the power electronic devices and of the position feedback system. It decides on particular lines of action with respect to the detected type of fault.