| 基于3阶补偿网络的Buck电路输出电压控制策略的设计 |
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| 引用本文： | 唐俊峰,薛勇,肖雷,石峰.基于3阶补偿网络的Buck电路输出电压控制策略的设计[J].武汉科技学院学报,2011(6). |
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| 作者姓名： | 唐俊峰 薛勇 肖雷 石峰 |
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| 作者单位： | 武汉纺织大学机械工程与自动化学院,湖北武汉,430073 |
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| 摘 要： | Buck电路是一种降压斩波器,降压变换器输出电压平均值Vo等于占空比乘以输入电压Vin。通常电感中的电流是否连续,取决于负载的大小,所以简单的BUCK电路输出的电压不稳定,一旦负载突变会造成严重后果。加入3阶运算放大器补偿器以实现PID控制。可通过采样环节得到PWM调制波,再与基准电压进行比较,通过PID控制器得到反馈信号,与三角波进行比较,得到调制后的开关波形,将其作为开关信号,从而实现BUCK电路闭环PID控制系统。
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| 关 键 词： | Buck电路 PID调节 PWM控制 |
Buck Circuit Output Voltage Control Strategy Based on 3-order Compensation Network |
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| TANG Jun-feng,XUE Yong,XIAO Lei,SHI Lang-feng.Buck Circuit Output Voltage Control Strategy Based on 3-order Compensation Network[J].Journal of Wuhan Institute of Science and Technology,2011(6). |
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| Authors: | TANG Jun-feng XUE Yong XIAO Lei SHI Lang-feng |
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| Institution: | TANG Jun-feng,XUE Yong,XIAO Lei,SHI Lang-feng(College of Mechanical Engineering and Automation,Wuhan Textile University,Wuhan Hubei 430073,China) |
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| Abstract: | Buck circuit is a step-down chopping device,step-down converter output voltage average Vo equals Duty Ratiomultiplied by input voltage Vin.Usually,the current whether successive inductance load size,so it depends on simple BUCK circuit output voltage instability,once load mutations can have serious consequences.Add 3 type op-amp compensator to realize PID control.But by sampling link get PWM waves,compared with again,through the benchmark voltage feedback signal PID controller,compared with triangle wave,get the switch waveform,modulated as the switch signals,thus realizing closed-loop PID control system BUCK circuit. |
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| Keywords: | Buck Circuit PID Adjustment PWM Control |
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