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Received: 2007-07-23

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Journal of Zhejiang University SCIENCE A 2008 Vol.9 No.2 P.156-164


Study on inverter fault-tolerant operation of PMSM DTC

Author(s):  Yznaga Blanco IVONNE, Dan SUN, Yi-kang HE

Affiliation(s):  School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   sundan@zju.edu.cn

Key Words:  Permanent magnet synchronous motor (PMSM), Direct torque control (DTC), Fault-tolerant operation, Four-switch inverter, Nonlinear perpendicular flux observer

Yznaga Blanco IVONNE, Dan SUN, Yi-kang HE. Study on inverter fault-tolerant operation of PMSM DTC[J]. Journal of Zhejiang University Science A, 2008, 9(2): 156-164.

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A1 - Yznaga Blanco IVONNE
A1 - Dan SUN
A1 - Yi-kang HE
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DOI - 10.1631/jzus.A071399

This paper presents an investigation of inverter fault-tolerant operation for a permanent magnet synchronous motor (PMSM) direct torque control (DTC) system under various inverter faults. The performance of a faulty standard 6-switch inverter driven PMSM DTC system is analyzed. To avoid the loss or even disaster caused by the inverter faults, a topology-modified inverter with fault-tolerant capability is introduced, which is reconfigured as a 3-phase 4-switch inverter. The modeling of the 4-switch inverter is then analyzed and a novel DTC strategy with a unique nonlinear perpendicular flux observer and feedback compensation scheme is proposed for obtaining a continuous, disturbance-free drive system. The simulation and experimental results demonstrate that the proposed inverter fault-tolerant PMSM DTC system is able to operate stably and continuously with acceptable static and pretty good dynamic performance.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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