A Novel Voltage-Boosting Modulation Strategy to Reduce DC-Link Capacitance for Brushless DC Motor Drives

In this article, a novel method is proposed to reduce the dc-link capacitance of the brushless dc motor (BLDCM) system. In the proposed strategy, the charging mode of dc-link capacitor is designed to improve the energy stored by dc-link capacitor in the charging process instead of reducing the disch...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2022-12, Vol.37 (12), p.15397-15410
Main Authors: Li, Xinmin, Yuan, He, Yan, Yan, Chen, Wei, Zhang, Guozheng, Shi, Tingna, Xia, Changliang
Format: Article
Language:English
Subjects:
Boost control
brushless dc motor (BLDCM)
Brushless DC motors
Brushless motors
Capacitance
Capacitors
Charging
Control systems design
D C motors
dc-link
Electric potential
Insulated gate bipolar transistors
Modulation
Rectifiers
small capacitor
Switches
Voltage
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Summary:In this article, a novel method is proposed to reduce the dc-link capacitance of the brushless dc motor (BLDCM) system. In the proposed strategy, the charging mode of dc-link capacitor is designed to improve the energy stored by dc-link capacitor in the charging process instead of reducing the discharge time of dc-link capacitor used in previous article. The new modulation strategy and controller is designed to pump the dc-link capacitor voltage and ensure that it exceeds the ac voltage peak. The proposed modulation strategy has three vectors. The charging vector is used to improve the dc-link capacitor voltage, and the effective vector and zero vector are used to adjust the motor speed. For practical application, we provide an engineering calculation method to get the dc-link capacitance, and prove that the dc-link voltage can exceed the average voltage of the BLDCM. The experimental results verify the correctness of the theoretical analysis and the feasibility of the proposed method.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2022.3197444