摘要：文章在分析基于功率控制的Buck變換器的小信號(hào)模型的基礎(chǔ)上，探討了斬波器中反饋控制的傳遞函數(shù)和環(huán)路參數(shù)的設(shè)計(jì)，設(shè)計(jì)了雙極點(diǎn)、雙零點(diǎn)的PI補(bǔ)償器。實(shí)驗(yàn)結(jié)果表明，補(bǔ)償后的系統(tǒng)不僅提高了系統(tǒng)響應(yīng)速度，而且消除了穩(wěn)態(tài)誤差，系統(tǒng)性能明顯提高。 敘詞：Buck變換器 感應(yīng)加熱 PI補(bǔ)償器 雙極點(diǎn)—雙零點(diǎn) Abstract：A two-pole and two-zero PI compensator is designed in this paper. It is based on the analysis of the small-signal model of Buck converter in power control ,and the discussion of the design of transfer function and loop parameters in converterThe experimental results show that the compensated system not only improves the system response speed, and eliminates the steady-state error, system performance improved markedly. Keyword：Buck converter, Induction heating, PI compensator, Two-pole and two-zero