Loading...

Proposal of a fault-tolerance technique for 1-ph open circuit fault in resolvers

Bahari, M ; Sharif University of Technology | 2021

417 Viewed
  1. Type of Document: Article
  2. DOI: 10.1109/JSEN.2021.3076173
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2021
  4. Abstract:
  5. Due to their cost-effective manufacturing and robust structure, an electromagnetic sensor called resolver is being applied in a wide range of applications, especially in those which high reliability is particularly essential. Since resolvers are usually chosen as position detector units in harsh environments, their chronic exposure to high temperature and mechanical shocks is unpreventable and accordingly, performance failure as a result of output signal winding open circuit fault (OCF) is inevitable. In this paper, a new technique is proposed to keep the performance of the resolver within an acceptable range of position error while one of the output signals (SIN/COS) is inaccessible. To this end, normalized cross-correlation (NCC) was utilized to detect the OC faulted signal winding. Since Resolver-to-Digital Converter (RDC) needs two separate input signals to measure the position of the rotary part, the faulted output signal is reconstructed by means of a healthy signal envelope and quadrant of the resolver's signal. The mentioned technique was implemented on a toroidally-wound variable reluctance 5-X resolver. Time-stepping finite element analysis (TSFEA) is used for all the simulations to justify the proper functioning of the proposed technique. Eventually, close agreement between the results of experimental and TSFEA outputs indicate the satisfactory precision of the simulations and the method. © 2001-2012 IEEE
  6. Keywords:
  7. Cost effectiveness ; Fault tolerance ; Timing circuits ; Winding ; Electromagnetic sensors ; Fault tolerance techniques ; Normalized cross correlation ; Open circuit faults ; Performance failure ; Resolver-to-digital converters ; Time-stepping finite elements ; Variable reluctance ; Correlation detectors
  8. Source: IEEE Sensors Journal ; Volume 21, Issue 14 , 2021 , Pages 15987-15992 ; 1530437X (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/9417214