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Design the PID controller for buck-boost converter

于 2023-03-30 发布 文件大小:1.40 kB
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资源描述將上述數值代入整理可以得 ,畫出未補償前的 波德圖   Buck-boost未補償前波德圖 由波德圖可以看出系統GM(-9.88dB)與PM(-14.4˚)都不穏定,操作於CCM的降-升壓轉換器有一個右半平面(RHP)零點,由於RHP零點使相位落後了90°,為了避免引起過多的相移造成系統不穩,增益交越頻率值應小於右半平面零點,一般取頻寬為右半平面零點頻率的1/3~1/5,且需要將系統的Phase Margin設計在45°-60°。 本系統增益交越頻率fC選擇800Hz,相位提升約60°。 首先設計相位領先補償

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