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所属单位：自动化学院
发表刊物：IEEE Trans Power Electron
摘要：This paper proposes an improved zero current detection for critical conduction mode (CRM) control, which can compensate the input current distortion caused by the signal propagation delay and the existence of the negative resonance current. A unified variable on-time calculation method is also proposed to unify the formulas under the zero-voltage-switching condition and the valley-switching condition. Since these two methods are dependent on the boost inductance and device junction capacitance, which may be different from the nominal values, effort is needed to compensate the deviation on these two parameters. In this paper, an online monitoring method is proposed to compensate the numerical deviation. The proposed method only needs to sense the input voltage, output voltage, and the reverse flow time of the inductor current, leading to a high power quality in the entire input and load conditions. The experimental results of the proposed methods are demonstrated on a 200-W GaN-based CRM boost power factor correction prototype. With the proposed methods, the input current total harmonic distortion is only 0.78% at 110 VAC input with full load and 2.1% at 220 VAC input with full load. © 1986-2012 IEEE.
ISSN号：0885-8993
是否译文：否
发表时间：2019-02-01
合写作者：Wu, Yu,吴云华,Guo, Zhehui,张之梁,陈乾宏
通讯作者：任小永