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Sensor fault-tolerant scheme for IPM synchronous motor drives via nonlinear observer

Nademi, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/TIE.2008.2004662
  3. Abstract:
  4. This paper describes a control scheme that allows an IPMS motor drive system to operate in the event of current and speed sensor faults. This task can be achieved by two control strategies: a nominal performance controller and a fault detection part. The nominal controller combines field oriented control and addresses fault tolerance scheme. Fault-tolerant strategy will operate in parallel with the system until a fault is detected. This approach is based on the adaptive backstepping observer. Stator resistance as possible source of system uncertainty is taken into account under different operating conditions. Sensors failure are detected and developed observer is used to estimate currents and stator resistance. Afterwards, the control system is investigated in terms of speed sensor malfunction. The nonlinear observer stability study based on the Lyapunov theory guarantees the stability and convergence of the estimated quantities, if the appropriate adaptation laws are designed and persistency of excitation condition is satisfied. In our control approach, references of d-q axis currents are generated on the basis of maximum power factor per ampere control scheme related to IPMSM drive. Simulation results will be performed to evaluate the effectiveness of this strategy
  5. Keywords:
  6. Fault tolerant ; Adaptation law ; Adaptive backstepping ; Control approach ; Control schemes ; Control strategies ; Fault-tolerant ; Fault-tolerant strategy ; Field oriented control ; Interior Permanent-Magnet (IPM) synchronous motor ; Lyapunov theories ; Maximum power factor ; Motor drive system ; Nominal controller ; Non-linear observer ; Operating condition ; Persistency of excitation ; Sensor fault ; Simulation result ; Speed sensors ; Stability and convergence ; Stability study ; Stator resistance ; Synchronous motor drives ; System uncertainties ; Computation theory ; Controllers ; Electric drives ; Electric motors ; Electric power factor ; Energy conservation ; Fault detection ; Fault tolerance ; Fault tolerant computer systems ; Induction motors ; Observability ; Permanent magnets ; Quality assurance ; Sensors ; Stators ; Synchronous motors ; System stability ; Backstepping
  7. Source: AUPEC'09 - 19th Australasian Universities Power Engineering Conference: Sustainable Energy Technologies and Systems, 27 September 2009 through 30 September 2009, Adelaide ; 2009 ; 9780863967184 (ISBN)
  8. URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=5356644