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Time delay compensation of switching power amplifier for magnetic bearing based on DOB
Author(s): 
Pages: 103-109
Year: Issue:  5
Journal: Electric Machines and Control

Keyword:  磁轴承开关功率放大器脉冲宽度调制时间延时补偿干扰观测器;
Abstract: 为了解决延时引起的磁轴承系统稳定裕度下降问题,针对磁轴承开关功率放大器中存在的固有延时和可变延时进行了研究,提出了一种利用干扰观测器(disturbance observer,DOB)理论的时间延时补偿方法.该方法将开关功率放大器中产生的延时作为扰动项等效到输入端,并构造相应的干扰观测器模型对扰动项进行估计,实现对磁轴承开关功率放大器的延时补偿.仿真和实验结果表明,干扰观测器可以有效的降低超调,减小波形滞后失真,提高跟踪性能,从而验证此方法对于提高系统的动态响应速度是可行有效的.
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