Direct Torque Control of Five-leg Dual-PMSM Drive Systems for Fault-tolerant Purposes

Wei Wang; Jinghao Zhang; Ming Cheng; Ruiwu Cao

Direct Torque Control of Five-leg Dual-PMSM Drive Systems for Fault-tolerant Purposes

Vol. 17, No. 1, pp. 161-171, Jan. 2017

10.6113/JPE.2019.17.1.161

Direct torque control

Fault Tolerance

Five-leg VSI

PMSM

PDF

Abstract

To enhance the reliability of two-motor drive systems, this paper proposes an improved direct torque control (DTC) scheme (P-DTC) for five-leg dual-PMSM drive systems. First, the topology of a five-leg dual-PMSM drive system is illustrated. To clarify the analysis of the P-DTC, the standard DTC scheme for three-phase drive systems is presented. The operation of a five-leg dual-PMSM drive system is classified into three situations according to the definitions of the switching-vector unions. Compared with the existing DTC scheme (R-DTC), the P-DTC can minimize the replacement of active switching-vectors to zero switching-vectors. When this replacement cannot be avoided, the P-DTC uses a proposed master-slave selection principle to minimize the system error. Comparing with the R-DTC, the P-DTC has lower torque ripples, a wider speed range and a faster torque increasing response. Experiments have been carried out in the coupling and independent modes, and the effectiveness of the P-DTC is verified by the obtained results.

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Cite this article

[IEEE Style]

W. Wang, J. Zhang, M. Cheng, R. Cao, "Direct Torque Control of Five-leg Dual-PMSM Drive Systems for Fault-tolerant Purposes," Journal of Power Electronics, vol. 17, no. 1, pp. 161-171, 2017. DOI: 10.6113/JPE.2019.17.1.161.

[ACM Style]

Wei Wang, Jinghao Zhang, Ming Cheng, and Ruiwu Cao. 2017. Direct Torque Control of Five-leg Dual-PMSM Drive Systems for Fault-tolerant Purposes. Journal of Power Electronics, 17, 1, (2017), 161-171. DOI: 10.6113/JPE.2019.17.1.161.