Fault Diagnosis and Fault-tolerant Control of Position Signal for Doubly Salient Motor
Bo Zhou · Proceedings of the CSEE · 2008
Position sensor is key of exact commutation for brushless motor. When position sensor is faulted,information of commutation will be incorrect, causes torque decrease, speed reduction. The study on fault diagnosis and fault-tolerant control of position signal is necessary in order to output correct commutation information and increase reliability. The method of real-time monitoring state of position signal is proposed through studying position signal of doubly salient permanent magnet motor. The logical controller of commutation is restructured. Fault-tolerant control is carried out immediately after fault of position signal is diagnosed. The validity and practicability of fault analysis, fault diagnosis and fault-tolerant control is verified by fault simulation and test.