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| 摘要: |
| 功率因数校正PFC(Power Factor Correction)是治理谐波污染的一种有效方法。设计了一种带中心抽头电感的单相Boost高功率因数校正器,与传统型功率因数校正主电路相比,该主电路拓扑结构只是在电感磁环上增加了几匝线圈,引出一个中心抽头,能够有效地抑制电流冲击,降低纹波噪声,提高了功率因数校正主电路的可靠性。控制电路采用平均电流型功率因数校正芯片UC3854。分析了尖端失真、输出电压飘升以及重载下输出电压参数调整等实际问题,并给出了相应的解决方案。仿真与试验结果表明,该Boost功率因数校正器设计合理、性能可靠,功率因数可达0.99,而且与流行的PFC控制电路兼容。 |
| 关键词: 功率因数校正,校正器,UC3854 |
| DOI： |
| 分类号:TM92 |
| 基金项目: |
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| Design of Boost power factor corrector based on UC 3854 |
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ZHANG Hou-sheng
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| Abstract: |
| PFC(Power Factor Correction) is an effective method to reduce harmonic currents in power grids.A single-phase Boost power factor corrector with centrally tapped inductor is proposed.Compared with the main circuit of traditional PFC,only several windings are added on magnetic ring and tapped,which effectively suppresses the impact current,reduces the ripple noise and improves the reliability of PFC main circuit.The average current mode PFC chip UC 3854 is used in the control circuit.Problems of cusp distortion,output voltage shifting and output voltage regulation with heavy load are analyzed and solutions are given respectively.The simulation and experiment show that,the proposed PFC design is rational,reliable and compatible with popular PFC control circuit,while its power factor reaches 0.99. |
| Key words: power factor correction,corrector,UC 3854 |
