FPGA Based Robust Open Transistor Fault Diagnosis and Fault Tolerant Sliding Mode Control of Five-Phase PM Motor Drives

The voltage-source inverters (VSI) supplying a motor drive are prone to open transistor faults. To address this issue in faulttolerantdrives applicable to electric vehicles, a new open transistor fault diagnosis (FD) method is presented in this paper. According to the proposed method, in order to define the FD index, the phase angle of the converter output current is estimatedby a simple trigonometric function. The proposed FD method is adaptable, simple, capable of detecting multiple open switchfaults and robust to load operational variations. Keeping the FD in mind as a mandatory part of the fault tolerant controlalgorithm, the FD block is applied to a five-phase converter supplying a multiphase fault-tolerant PM motor drive with nonsinusoidalunbalanced current waveforms. To investigate the performance of the FD technique, the fault-tolerant sliding modecontrol (SMC) of a five-phase brushless direct current (BLDC) motor is developed in this paper with the embedded FD block. Once the theory is explained, experimental waveforms are obtained from a five-phase BLDC motor to show the effectiveness ofthe proposed FD method. The FD algorithm is implemented on a field programmable gate array (FPGA).

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Cite this article

[IEEE Style]

M. Salehifar, R. S. Arashloo, M. M. Eguilaz and V. Sala, "FPGA Based Robust Open Transistor Fault Diagnosis and Fault Tolerant Sliding Mode Control of Five-Phase PM Motor Drives," Journal of Power Electronics, vol. 15, no. 1, pp. 131-145, 2015. DOI: 10.6113/JPE.2015.15.1.131.

[ACM Style]

Mehdi Salehifar, Ramin Salehi Arashloo, Manuel Moreno Eguilaz, and Vicent Sala. 2015. FPGA Based Robust Open Transistor Fault Diagnosis and Fault Tolerant Sliding Mode Control of Five-Phase PM Motor Drives. Journal of Power Electronics, 15, 1, (2015), 131-145. DOI: 10.6113/JPE.2015.15.1.131.