Torque Ripple Minimization of BLDC Motor by Using Vector Control

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Provided by: SSRG International Journals
Topic: Hardware
Format: PDF
In this paper, the authors provide an alternative approach to reduce torque ripple in square-wave BrushLess DC motors (BLDC motors). Instead of conventional square-wave form, the method uses the principle of vector control to optimally design the wave-form of reference current in such a way that the torque ripple is minimal. The proposed vector control has advantage of the torque ripple is greatly reduced, and the flux weakening for constant-power high-speed mode can be achieved by injecting a negative d-axis current into the control system, just like for the case of PM synchronous motors (sine type machines).
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