摘要
针对DC-DC变换器数学模型中的右半平面零点引起系统不稳定,输出电压产生负调,系统响应速度变慢等问题,提出一种非线性控制策略-限幅控制。以Boost变换器为研究对象,分析右半平面零点对系统暂态和稳态性能的影响。讨论占空比对系统非最小相位的影响以及对电路工作安全性的影响,给出占空比幅值限制范围。研究结果表明通过对DC-DC变换器采用限幅控制,解决了非最小相位系统的稳定性问题,同时减小了系统的负调,提高了系统响应速度。仿真和实验结果验证了所提出控制方法的可行性。
In order to solve system instability caused by the right half plane zero in the mathematical mod- el of DC-DC converter, negative regulation of output voltage, and slow system response, etc. A nonliner control strategy was proposed-limit control. The Boost converter was studied as the object, and the impact of the right half plane zeros on the transient and steady state performance of the system were analyzed, Effect of non-minimum phase and the influence of circuit work safety was discussed duty ration in the sys- tem, and the range of duty cycle limiting principle was studied. Results show that through the restriction control of the DC-DC converter, the non-minimum phase system stability was solved, the system negative accent was reduced, and the system speed of response was enhanced. The simulation and experimental results verified the feasibility of the proposed control method.
出处
《电机与控制学报》
EI
CSCD
北大核心
2015年第6期69-75,共7页
Electric Machines and Control
基金
国家自然科学基金(50977077
51277149)
关键词
DC-DC变换器
非最小相位系统
负调
右半平面零点
限幅控制
DC-DC converter
non-minimum phase systems
negative adjustment
zero of right halfplane
limitation control
