Brushless DC Motor Current Prediction Torque Ripple Suppression
Aiming at the torque ripple problem of brushless DC motor, a current predictive control method combined with commutation overlap method is proposed to suppress the commutation torque ripple Based on the analysis of the cause of the commutation torque ripple, the current prediction control method is...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Harbin University of Science and Technology Publications
2020-10-01
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| Series: | Journal of Harbin University of Science and Technology |
| Subjects: | |
| Online Access: | https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=1862 |
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| Summary: | Aiming at the torque ripple problem of brushless DC motor, a current predictive control method combined with commutation overlap method is proposed to suppress the commutation torque ripple Based on the analysis of the cause of the commutation torque ripple, the current prediction control method is combined with the ON_PWM conduction mode to control the motor During the commutation phase, the offphase and noncommutation phase are modulated by synchronous PWM, ensuring that the current rise rate of the turnon phase during commutation was the same as the turnoff phase current drop rate. Thus the noncommutated phase current was smoothly overtransformed during commutation, which in turn reduces torque ripple On the basis of the current prediction control, the torque ripple was further suppressed by eliminating the negative current of the DC bus Experiments show that the proposed method can significantly reduce the torque ripple in full speed range, verify the correctness of the control strategy, eliminate the DC bus negative freewheeling, and further suppress the torque ripple |
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| ISSN: | 1007-2683 |