TY - CHAP A1 - Grothmann, Benjamin A1 - Poelsterl, Thomas A1 - Gerling, Dieter T1 - Online compensation of current sensor gain-faults for safety-relevant IPM-drives T2 - 2017 IEEE Transportation Electrification Conference and Expo (ITEC), 22-24 June 2017, Chicago, IL, USA N2 - Detection and compensation of current sensor gain-faults regardless of the operating-point is a crucial aspect for safety-relevant servo-drives. This paper presents and investigates a new direct phase-gain re-balancing methodology, especially suited for interior permanent magnet machine (IPM) drives mostly operating at low speed-ranges including standstill. The proposed model-based approach utilizes high-frequency signal-injection (HFI) to facilitate fast and persistent sensor monitoring for any operating state of the drive. No additional sensing hardware is required. Extraction of the HFI-phase-current response enables detection and immediate compensation of sensor gain-faults. Implementation aspects of the proposed concept are discussed thoroughly. Experimental results are presented to prove and investigate robustness, reliability and fault-tolerant performance. KW - Acoustic noise KW - Current measurement KW - Frequency synchronization KW - Hardware KW - Phase measurement KW - Signal to noise ratio KW - Torque Y1 - 2017 U6 - https://doi.org/10.1109/ITEC.2017.7993355 SP - 701 EP - 706 PB - IEEE ER -