摘要
本文针对传统单相功率因数校正数字控制的不足,分析了输入电压过零时输入电流产生畸变的原因,加入占空比前馈控制来解决并进行仿真对比分析,在此基础上基于DSP实现了占空比前馈和反馈同时调节的数字控制算法,额定输入PFC电路满载运行时效率可达0.99,THD小于2%。
With an eye to the difficiency of traditional single-phase power factor corrector（PFC）, this paper analyzed the root cause of input current distortion while the input voltage zero crossing. Duty ratio feedforward method is applied for a practical solution, and a simulation is provided for valuating this strategy. At last, a mixed algorithm of feed forward and feedback control is proposed based on DSP, and the efficienty of PFC circuit is up to 0.99, THD is less than 2% on rated input with full load.
出处
《电源世界》
2010年第1期37-39,共3页
The World of Power Supply
关键词
数字控制技术
功率因数校正
低谐波畸变
Digital control, Power-factor correction（PFC）, Low total harmonic distortion（THD）
