摘要
介绍了一种基于磁开关的脉冲调制器的原理和设计方法。利用可饱和电感在非饱和与饱和条件下,其特点的不同,对PWM信号进行了处理。工作在非饱和条件下,磁开关断开,PWM信号输入无效;工作在饱和条件下,磁开关闭合,PWM信号输入有效,以此实现了对PWM信号的调制。通过对可饱和电感复位程度进行控制,即对复位后磁通密度的大小进行调节,从而可方便且经济地调节PWM脉宽。
This paper puts forward a new method of Pulse Width Modulation (PWM) based on Magnetic Amplifier. We modulate the PWM signal utilizing the different performance between saturated inductor and unsaturated inductor. When the saturable inductor has not saturated,the magnetic switch shuts down, and when it saturates, it works in a directshort condition.So we can modulate the PWM signal using a saturable inductor.We control the current of the auxiliary reset winding,and the reset Br, and then we can conveniently modulate the pulse width with low cost.
出处
《电力电子技术》
CSCD
北大核心
2006年第2期112-113,共2页
Power Electronics
基金
国家自然科学基金项目(50237030ZD)~~
关键词
放大器
电感
脉宽调制/磁开关
magnetic amplifier
inductor
PWM
magnetic reset