摘要
提出了一种新的准固定频率滞环PWM电流控制方法,该方法在滞环电流控制的基础上,引入频率反馈控制,使开关频率基本固定,解决了目前广泛使用的固定频率电流控制方法具有的次谐波振荡的问题,并且具有稳定性好、响应速度快、控制精度高的优点。对现有的固定频率电流模式控制方法和所提出的准固定频率PWM电流控制方法的原理和闭环响应进行了分析。
A novel quasi-constant frequency hysteresis P\V M control approach is presented. Frequency feedback is introduced in hysteresis current control to stabilize switching frequency. Comparing with the common used constant frequency current mode control, the new approach has better stability, faster transient and higher precision, as well as elimination of sub-harmonic oscillation. The principle and current loop dynamic response arc analyzed lor both constant frequency current mode control and newly presented quasi-constant frequency hysteresis PWM control, experiments have been carried out to proof the analysis.
出处
《电源技术应用》
2002年第11期1-5,共5页
Power Supply Technologles and Applications
基金
国家自然科学基金(50007007)
