Active DC-link circuit for single-phase diode rectifier system with small capacitance

2014 International Power Electronics and Application Conference and Exposition Pub Date : 2014-11-01 DOI:10.1109/PEAC.2014.7037974

Hojoon Shin, Jung-Ik Ha

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引用次数: 11

Abstract

This paper introduces the multifunctional circuit which is called as active DC-link circuit (ADLC) in single-phase diode rectifier system without electrolytic capacitor. This circuit is located to DC-link node in parallel and shows many performances such as energy buffer for decoupling ripple power and power factor correction (PFC) by controlling instantaneous system power. Therefore the diode rectifier system with ADLC does not need to equip additional PFC for satisfying grid regulations. Furthermore, since the ADLC can boost the DC-link voltage and supply the energy to the motor drive system while the DC-link voltage is lower than back electromotive force (EMF) voltage of motor, the drive system features constant torque and does not need excessive motor current for flux-weakening control in comparison with the conventional small capacitance motor drive system. This paper presents such a power control method and offers the design guideline of active DC-link circuit. The feasibility of the active DC-link circuit are verified by simulation results.

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小电容单相二极管整流系统的有源直流电路

介绍了一种无电解电容的单相二极管整流系统的多功能电路——有源直流链路电路。该电路并联在DC-link节点上，具有解耦纹波功率的能量缓冲器和控制系统瞬时功率的功率因数校正(PFC)等性能。因此，采用ADLC的二极管整流系统不需要额外安装PFC以满足电网的要求。此外，由于ADLC可以在直流电压低于电机反电动势电压的情况下提高直流电压并为电机驱动系统提供能量，因此与传统的小电容电机驱动系统相比，驱动系统具有恒定转矩的特点，不需要过大的电机电流进行弱磁控制。本文提出了这种功率控制方法，并给出了有源直流链路电路的设计准则。仿真结果验证了该有源直流链路电路的可行性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2014 International Power Electronics and Application Conference and Exposition

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