Optimum Third Current Harmonic During Nondead Zone and Its Control Implementation to Improve PF for DCM Buck PFC Converter

Optimum Third Current Harmonic During Nondead Zone and Its Control Implementation to Improve PF for DCM Buck PFC Converter
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DCM Buck PFC变换器非死区最佳三次电流谐波及其改善PF的控制实现

DOI:
10.1109/tpel.2017.2657883
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发表时间:
2017-01
影响因子:
6.7
通讯作者:
Mao Chunyan
Mao Chunyan
中科院分区:
工程技术1区
文献类型:
--
作者:
Yao Kai;Zhou Xufeng;Yang Fei;Yang Siwen;Cao Cheng;Mao Chunyan

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降压型功率因数校正(PFC)变换器因其在整个通用输入电压范围内的高效率而广泛应用于低功率应用中。然而,由于固有的死区,输入功率因数(PF)不高。介绍了一种工作在不连续导通模式下的降压型PFC变换器。当占空比在线周期期间恒定时,输入电流包含大量负三次谐波,特别是在低输入电压下。通过在非死区期间提出最佳三次谐波注入及其控制实现,在整个通用输入电压范围内实现了更高的PF和更低的输出电压涟漪。实验验证进行了120-W的原型与通用输入。
A buck power factor correction (PFC) converter is widely used in low-power applications for its high efficiency in the entire universal input voltage range. However, because of the inherent dead zone, the input power factor (PF) is not high. A buck PFC converter operating in a discontinuous conduction mode is introduced. When the duty cycle is constant during the line cycle, the input current contains a large amount of negative third harmonic, especially at a low input voltage. By proposing an optimum third harmonic injection during the nondead zone and its control implementation, a higher PF and a lower output voltage ripple within the entire universal input voltage range are achieved. The experimental verifications are carried out on a 120-W prototype with universal input.
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