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Fault Detection of BLDC Motor Drive Based on Operating Characteristic  

Lee, Jung-Dae (한양대 대학원 전기공학과)
Park, Byoung-Gun (한양대 대학원 전기공학과)
Kim, Tae-Sung (한양대 대학원 전기공학과)
Ryu, Ji-Su (한영전기공업㈜ 기술연구소)
Hyun, Dong-Seok (한양대 전기제어생체공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.13, no.2, 2008 , pp. 88-95 More about this Journal
Abstract
This paper proposes a fast fault detection algorithm under open-circuit fault of a switch for a brushless DC(BLDC) motor drive system. This proposed method is configured without the additional devices for fault detection and identification. The fault detection and identification are achieved by a simple algorithm using the operating characteristic of the BLDC motor. After the fault identification, the drive system is reconfigured for continuous operation. This system is reconfigured by four-switch topology connecting a faulty leg to the middle point of DC-link bidirectional switches. This proposed method can also be embedded into existing BLDC motor drive systems as a subroutine without excessive computational effort. The feasibility of a the proposed fault detection algorithm is validated in simulation and experiment.
Keywords
BLDC Motor Drive; Fault Detection; Open-Circuit Faults; Inverter;
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