改进了CRM Boost-PFC电路的COT控制策略,应用于海洋集成电力系统
Hongxing Chen1,2, Jian Xiao3, Jianwen Lin3
1Fuzhou Institute of Oceanography, Minjiang University, Fuzhou, 350108, Fujian Province, China.
Scientific reports
|May 18, 2025
概括
这项研究引入了一种新的软切换控制方法,用于关键导电模式的Boost-PFC电路. 改进的方法通过减少开关管损失和电压压力来提高电磁干扰 (EMI) 性能.
科学领域:
- 电气工程 电气工程
- 电力电子 电力电子 电力电子
- 电磁兼容性 电磁兼容性 电磁兼容
背景情况:
- 关键导电模式 (CRM) 提升PFC电路面临高开关管开放电压的挑战,导致显著的开关损失和电磁干扰 (EMI).
- 在CRM Boost-PFC电路中,高的DVD/dt和开启电压会降低EMI性能和可靠性.
研究的目的:
- 为CRM Boost-PFC电路提出和验证一个改进的软切换常量及时 (COT) 控制方法.
- 为了减轻CRM Boost-PFC电路中的高开启电压和减少开关损失,从而改善EMI特性.
主要方法:
- 开发一种可适应的软切换COT控制策略,使ZVS在低输入电压和高输入电压的山谷导电.
- 分析拟议的控制方法对开关管dvd/dt,开关损失和整体EMI性能的影响.
- 为20-40W原型设计和模拟关键电路参数.
主要成果:
- 拟议的COT控制方法有效地降低了开关电压,开关损失和开关管的dV/dt.
- 由于自适应软切换策略,观察到更好的EMI性能.
- 实验验证证了该方法在20-40W原型的有效性,显示了有利的输入/输出特性和效率.
结论:
- 改进的软切换COT控制方法为提高CRM Boost-PFC电路中的EMI性能提供了可行的解决方案.
- 适应性策略有效地平衡了ZVS和山谷导电,以在不同的输入电压中实现最佳运行.
- 该研究验证了拟议的控制方法在功率因子校正电路中的实际适用性和有效性.
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