摘要
峰值电流模式PWM控制方法在开关电源设计中被广泛采用。文中提出一种新的峰值电流模式准PWM控制方法,即占空比反馈调节的峰值电流模式准PWM控制方法。采用该控制方法设计的电流环不再存在电感电流次谐波振荡问题,无需谐波补偿,具有高度的稳定性,且可单周期内消除当周期的扰动偏差快速进入新的稳定状态,动态调节时间极短,具有极好的快速调节性能。仿真与实验结果验证了分析的准确性。
Peak current mode PWM control method is widely used in the design of switching mode power supply. In this paper, a new peak current mode quasi-PWM control method is proposed, that's the peak current mode quasi-PWM control based on duty cycle feedback. The current loop designed by this control method no longer has the current sub-harmonic oscillation problem and ramp compensation is not needed. The current loop is with strong stability. Moreover, it can eliminate the current deviation of the cycle within one cycle time and quickly come into a new steady state with fast dynamic response. Simulations and experiments have carried out to proof the analysis.
出处
《通信电源技术》
2009年第3期9-12,共4页
Telecom Power Technology
基金
广东省科技计划项目资助(2005A10505005
2007B010400080)
作者简介
杨苹(1967-),女,广西钦州人,博士,教授,博士生导师,研究方向为电力电子建模与控制。
石安辉(1978-),男,四川南充人,硕士研究生,研究方向为电力电子建模与控制。
刘军(1984-),男,山东威海人,硕士研究生,研究方向为电力电子建模与控制。