Minimizing DC-Link Capacitor RMS Current in Power Conversion Units Through Synchronous Operation

被引:0
|
作者
Christian, Shamar [1 ]
Fantino, Roberto [1 ]
Solangi, Asim Amir [1 ]
Balda, Juan Carlos [1 ]
机构
[1] Univ Arkasnas, Elect Engn, Fayetteville, AR 72701 USA
来源
2022 IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION, APEC | 2022年
基金
美国国家科学基金会;
关键词
capacitor; synchronization; DC-DC; DC-AC; power density;
D O I
10.1109/APEC43599.2022.9773611
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
DC-Link filtering capacitors occupy a significant volume in DC-DC-AC power conversion unit (PCU) for electric vehicle (EV) applications, where manufacturing costs and power density are related metrics and are important. Typically, the DC-Link capacitor is sized electrically based on the desired voltage ripple and rms current capacity, with the latter being the ultimate deciding factor in the capacitor overall physical volume. This paper proposes a synchronous modulation strategy that matches the current of an interleaved DC-DC converter in discontinuous conduction mode (DCM) with that of the inverter-drawn current to significantly reduce the RMS current ripple in the DC-link capacitor, and thus enabling a volumetric reduction when considering system design and increasing capacitor lifetime. Simulation and experimental results are presented to validate the claims of this work.
引用
收藏
页码:562 / 566
页数:5
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