家电科技 ›› 2023, Vol. 0 ›› Issue (1): 88-91.doi: 10.19784/j.cnki.issn1672-0172.2023.01.015

• 论文 • 上一篇    下一篇

一种效率优化的高频PFC控制方法

霍兆镜, 毕然   

  1. 广东美的制冷设备有限公司 广东佛山 528315
  • 出版日期:2023-02-01 发布日期:2023-04-24
  • 作者简介:霍兆镜,硕士学位。研究方向:电力电子技术。地址:广东省佛山市顺德区北滘镇林港路22号。E-mail:zhaojing.huo@midea.com。

An efficiency optimized high frequency PFC control method

HUO Zhaojing, BI Rang   

  1. Guangdong Midea refrigeration equipment Co., Ltd. Foshan 528315
  • Online:2023-02-01 Published:2023-04-24

摘要: 为提升空调器电控的功率密度,需提升开关器件的工作频率,从而减少无源器件的体积。基于功率因数校正(PFC)的工作原理,分析PFC高频化后功率器件发热的根本原因。通过改善控制方法以及选取更加匹配的功率器件降低功耗,并采用一台具有7.2 kW制冷能力的空调器作为PFC的负载进行实验验证,结果表明,与现有技术方案相比,采用改善的控制方法以及设计方案后PFC电路的IGBT温度能够降低15℃以上,快恢复二极管温度能够降低10℃以上。

关键词: 高频, PFC, 控制方法, 变载频

Abstract: In order to improve the power density of the air conditioner, it is necessary to increase the operating frequency of the switching tube to reduce the volume of the passive device. Based on the working principle of Power Factor Correction (PFC), the root cause of power device heating after HIGH frequency PFC is analyzed. By improving the control method and selecting more matched power devices, the power dissipation was reduced, which was verified by using an air conditioner with 7.2 kW of refrigeration capacity as the load of PFC for experiments. Compared with the existed technical solutions, the IGBT temperature of the PFC circuit can be reduced by more than 15℃ after using the control method and the design scheme, and the temperature of the fast recovery diode can be reduced by more than 10℃.

Key words: High frequency, PFC, Control method, Frequency variation

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