Easy Hall position sensor fault-tolerant control algorithm for brushless DC drives

Abstract

This paper focuses on Hall-effect sensor fault detection and compensation for brushless dc (BLDC) drives. A methodology based on the Hall position vector phase differences is investigated to detect Hall fault. In order to obtain high-resolution position estimation in fault operation, an improved interpolation position estimation algorithm is described. The method’s most innovative feature is the rapid fault diagnosis. After that, Hall signal noise is analyzed between sampling periods, and a correction machine to filter Hall noise and compensate the filter delay is proposed. Experimental results are shown to validate the effectiveness of the proposed method in the BLDC drive system.