Minimization of Torque Ripple Content for BLDC Motor by Current Controller using MLI

Ranjithkumar, G.; Prasad, Kamisetti N V

doi:10.1016/j.proeng.2012.06.362

Cited by 8 publications

(1 citation statement)

References 14 publications

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“…Torque ripple can create undesirable noise and vibration and control inaccuracies in speed applications. Hence, a minimum amount of torque ripple is always required in many applications [3,4]. Generally, the torque ripple in permanent magnet motors is produced by three physical phenomena: (i) Mutual torque is due to the interactions between the permanent magnet field and the stator currents in the phase windings; (ii) Cogging torque is due to the attraction of the permanent magnet to the salient portions of the stator iron; (iii) Reluctance torque is due to winding self-inductance variations that are a function of the rotor position.…”

Section: Introductionmentioning

confidence: 99%

Torque Ripple Reduction of Brushless DC Motor Using Genetic Algorithm

Chen¹,

Shieh²,

Ren³

2017

Proceedings of the 4th International Conference of Control, Dynamic Systems, and Robotics (CDSR'17)

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-Brushless DC motor torque ripple reduction has been the main issue in servo driving systems in which the speeds of fluctuation, vibration, and acoustic noise should be minimized. Most methods for suppressing torque ripples usually require Fourier series, analysis, finite element analysis or least-mean-square minimization. These methods might lead to errors during complex Fourier series analysis and cost much calculation time. This paper presents a new method to improve torque ripple based on the Genetic Algorithm. The proposed method depends on Genetic Algorithms to search for the Fourier coefficients of three-phase stator currents for the given back-EMF waveforms. These Fourier coefficients can then be used to recompose three-phase optimum current commands for three-phase balanced brushless DC motor driving. The torque ripple must therefore be expected to improve in this way if stator currents are perfectly achieved. The validity and practical applications of the proposed method are verified from experiments using the TMS320F2812 DSP. In the experimental structure, the three-phase optimum current commands and the measured three-phase backEMFs are set up as the tables. They are obtained according to the rotor angle and speed information from the encoder. The experimental results can prove that the proposed method provides a simple and efficient way to obtain three-phase optimum stator currents for the given back-EMF waveforms and the minimum torque ripple will also be acquired.

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Section: Introductionmentioning

confidence: 99%