Torque ripple reduction for brushless DC motor speed control system

Reducing the torque ripples generated in a brushless DC motor speed control system for inverters with two different switching modes is studied. The current and voltage functions of the inverters, the 120 degrees discontinuous current mode and the 180 degrees continuous current mode, are formulated. The required input functions to reduce the torque ripples are thus formed. Simulation results illustrating the feasibility of this approach are included. As the generation of the required compensated current functions is complex, a suggestion to implement such a control system using a digital signal processor is presented.<
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