A Fast Diagnosis Strategy for Inverter Open-Circuit Faults Based on the Current Path of Brushless DC Motors

The proposed method in this letter aims to diagnose open-circuit faults quickly and accurately in brushless dc motor inverters to ensure the motors’ safe operation. The technique utilizes a topology for current path detection and a method based on current path change to identify and locate faults in the inverter. The proposed method improves the speed of fault diagnosis and is not affected by sudden changes in load. Additionally, it allows for prompt handling of faults and ensures reliable motor operation. The effectiveness of this method is validated through experimental results.