A new fault diagnosis method for hall signals in brushless DC motor drives

Abstract

The Hall-sensor-controlled brushless dc (BLDC) motors have been widely used in a myriad of industrial and commercial applications due to their simplicity and low cost; meanwhile the fault-tolerant operation of Hall sensor drives is receiving renewed attention in recent literature. This paper proposes an innovative fast fault diagnosis (FFD) method for analyzing different fault cases and reconstructing the operation in the shortest possible time. Compared with established fault-tolerant methods, the new FFD method does not require complicated vector-tracking observer, while greatly improving the diagnosis speed. The presented experimental results verify the effectiveness of the proposed method and demonstrate its advantages during fast electro-mechanical transients over the established methods.