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Fault Tolerant System for Open Switch Fault of BLDC Motor Drive  

Park, Byoung-Gun (한양대 대학원 전기공학과)
Kim, Tae-Sung (한양대 대학원 전기공학과)
Ryu, Ji-Su (한양대 전기공학과 전력전자연구실)
Lee, Byoung-Kuk (성균관대 정보통신공학부)
Hyun, Dong-Seok (한양대 전기제어생체공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.11, no.2, 2006 , pp. 164-171 More about this Journal
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.
Keywords
BLDC Motor; Fault Tolerant; Open Switch Faults; Inverter;
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  • Reference
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