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Torque ripple reductions for non-sinusoidal BEMF Motor : An observation based control approach

Abstract : Torque ripples are usually found in brushless DC (BLDC) motor control applications. This article presents the design of non-sinusoidal back electromotive forces (BEMF) observer for a BLDC motor in order to reduce electromechanical torque ripples. For their robustness quality, a high order sliding mode observer is used to observe the non-sinusoidal BEMF which allows to determine magnetic field angular relative position leading to a so-called extended Park’s transformation. Using this extended transformation, speed and torque vector control can be made with better performances than the classical Park’s transformation. Simulation results are performed to show the effectiveness of the proposed approach.
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Romain Delpoux, Xuefang Lin-Shi, Xavier Brun. Torque ripple reductions for non-sinusoidal BEMF Motor : An observation based control approach. 20th IFAC World Congress, Jul 2017, Toulouse, France. pp.15766 - 15772, ⟨10.1016/j.ifacol.2017.08.2311⟩. ⟨hal-01624343⟩

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