| Title |
A Novel Fault Detection Scheme for Voltage Fed PWM Inverter |
| Authors |
Ok-Sun Yu ; Nam-Ju Park ; Dong-Seok Hyun |
| Keywords |
Fault Detection; Fault Tolerance; Voltage Fed Inverter |
| Abstract |
In this paper, the fault tolerant system for BLDC motor has been proposed to maintain control performance under an open switch fault of inverter. The fault identification is proposed to two methods, which are using the difference between reference and actual current, and adding voltage sensors across lower legs of inverter. The reconfiguration scheme is achieved by the four-switch topology connecting a faulty leg to the middle point of DC-link using bidirectional switches. The proposed fault tolerant system quickly recovers control performance by short fault detecting time and reconfiguration of system topology. Therefore, continuous free operation of the BLDC motor drive system after faults is available. The superior performance of the proposed fault tolerant system is proved by simulation. |