Fault tolerant operation method of double winding WFSMs system in high power mine equipment

In order to ensure safe and reliable operation of high power mine equipment in fault condition, a fault tolerant operation method of double winding WFSMs system in high power mine equipment was proposed. First, double winding WFSMs mathematical model under two phase rotating coordinate system was set up, and air gap flux was selected as main magnetic field of vector control. Then, mixture gap flux observer of self-switching voltage and current model were built. On this basis, double WFSMs vector control system was designed based on primary and slave parallel drive mechanism, and changing relationship of the WFSMs system models in fault condition was pointed out, then active current correction mechanism was introduced to realize tolerant operation of double winding WFSMs. Finally, 2.5 MW mine hoist industrial field test results show that the proposed method can realize tolerant operation of the system in fault condition, and meanwhile guarantee dynamic and steady state performance of the WFSMs drive system.