摘要
针对永磁偏置的磁轴承开关功放需要实现低纹波的问题,提出了一种新颖的三电平PWM控制方法,并给出了具体实现电路。通过三电平与传统的两电平PWM开关功放的对比实验验证了该方案的可行性。
This paper introduces a novel three-level Pulse Width Modulation （PWM） strategy used to reduce power consumption of switching power amplifier for active magnetic beating biased with permanent magnet.Firstly the basic principle of the switching power amplifier is analyzed, then the realization of the control strategy is presented,finally the experimental results compared with the common two-level PWM switching power amplifier show that the three-level PWM switching power amplifier significantly reduces the output current tipple and meets the requirement for low current tipple. At the same time the experimental results demonstrate the feasibility and effectiveness of the mentioned scheme.
出处
《电力电子技术》
CSCD
北大核心
2006年第1期1-2,11,共3页
Power Electronics
基金
国家高技术航天领域项目(863-2-2-4-9B)~~
关键词
功率放大器
脉宽调制/磁轴承
开关功放
三电平
电流纹波
power amplifier
PWM/magnetic beating
switching power amplifier
three-level
current ripple
