Affiliations: College of Electrical Engineering and Automation, Hefei University of Technology, Hefei, Anhui, China
Correspondence:
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Corresponding author: Hongmei Li, College of Electrical Engineering and Automation, Hefei University of Technology, Hefei, Anhui, China. E-mail:hongmei.li@hfut.edu.cn
Abstract: As the key sensor of Electric Vehicle Permanent
Magnet Synchronous Machine (PMSM) drive system, the current sensor usually
occurs gain and offset fault, and the fault will directly affect the
performance and stability of PMSM drive system. Therefore, the inverter
nonlinearity dead-time compensation method is first investigated allowing
for parasitic capacitor effect, and the proposed method are compared with
the traditional dead-time compensation method, moreover, the technical
advantages are all validated via experimental results, the fault diagnosis
accuracy problem of current sensor caused by the inverter nonlinearity
induced offset voltage between inverter reference and output voltage are
cleverly solved. Then, the differential algebraic based fault diagnosis
method and adaptive fault-tolerant control strategy are presented. An
integrated solution of PMSM drive system is innovatively proposed integrated
the proposed dead-time compensation method with proposed differential
algebraic based fault diagnosis method and adaptive fault-tolerant control
strategy together. At last, system simulation and dSPACE based experimental
test are implemented to validate the feasibility and effectiveness of
proposed integrated solution of PMSM drive system and the conclusions are
shown.
Keywords: PMSM, current sensor, fault diagnosis, tolerant control, differential algebraic
