PID控制的Buck变换器，虽然能够运行，但感觉有诸多问题，望大虾帮小弟瞅瞅！

buck_experiment 这个模型是按照书上例题的参数和结构在saber里面搭建的，书上设计的输出电压是12V，但实际运行的接近24V，并且改变参考电压对输出电压值没有什么影响，还有改变三角载波的幅值对输出的电压也没什么影响，希望有人能帮我检查，解释下。非常感谢！

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z_yang

LV.2

2012-04-17 16:16

your circuit works well after changes the amplitude of OSC.

It worked under the condition as you described just because the loop had not work at all (you can see that the output of EA always zero), so after I changed the OSCs amplitude , the loop is working well

z_yang

LV.2

2012-04-17 16:45

@z_yang

yourcircuitworkswellafterchangestheamplitudeofOSC.Itworkedundertheconditionasyoudescribedjustbecausetheloophadnotworkatall(youcanseethattheoutputofEAalwayszero),soafterIchangedtheOSCsamplitude,theloopisworkingwell[图片]

AND I CHANGED THE VREF TO 10v, then the Vout=20 as RF1=RF2=100K

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