基于UCC28070的六级交错Boost PFC设计
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摘要
采用三块TI公司生产的UCC28070芯片,设计构成六级交错并联型Boost PFC电路,实现5 kW样机的功率因数校正。该拓扑具有电力利用率高、谐波含量低、输入电流纹波小等优点。具体地,将阐述交错并联Boost PFC工作原理和部分元器件的选型,分析输出电感电流纹波,并利用F28335芯片产生同步信号。结果显示,在六级交错PFC电路设计中,将AC输入电压转为400 V的直流输出,采用恒定65 kHz的开关频率,最终功率因数超过了99%。
Using three UCC28070 chips produced by TI company,a six-stage interleaved parallel Boost PFC circuit is designed to realize power factor correction of 5 kW prototype. This topology has the advantages of high power utilization,low harmonic content and low input current ripple. The working principle of staggered parallel Boost PFC and the selection of some components were described. The output inductance current ripple was analyzed and the synchronous signal was generated by F28335 chip. The results showed that in the design of six-stage interleaved PFC circuit,AC input voltage was converted to 400 V DC output,and a constant switching frequency of 65 kHz was adopted. The final power factor exceeded 99%.
Using three UCC28070 chips produced by TI company,a six-stage interleaved parallel Boost PFC circuit is designed to realize power factor correction of 5 kW prototype. This topology has the advantages of high power utilization,low harmonic content and low input current ripple. The working principle of staggered parallel Boost PFC and the selection of some components were described. The output inductance current ripple was analyzed and the synchronous signal was generated by F28335 chip. The results showed that in the design of six-stage interleaved PFC circuit,AC input voltage was converted to 400 V DC output,and a constant switching frequency of 65 kHz was adopted. The final power factor exceeded 99%.
引文
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[3]郑航.交错并联有源功率因数校正器的研究[D].重庆:重庆大学,2014.
[4]Liu J,Chen W,Zhang J,et al.Evaluation of Power Losses in Different CCM Mode Single-phase Boost PFCConverters via a Simulation Tool[C].Industry Applications Conference,2001.
[2]Lu Y X X.Analysis and Design for 5kW Power Factor[C].Asia-Pacifi c Power and Energy Engineering Conference,2012:1-4.
[3]郑航.交错并联有源功率因数校正器的研究[D].重庆:重庆大学,2014.
[4]Liu J,Chen W,Zhang J,et al.Evaluation of Power Losses in Different CCM Mode Single-phase Boost PFCConverters via a Simulation Tool[C].Industry Applications Conference,2001.