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1、ClicktoeditMastertitlestyle环路补偿很容易1ClicktoeditMastertitlestyle课程的目的�确定功率级特性�说明TypeII补偿–电流模式�阐述TypeIII补偿–电压模式�补偿电流模式降压�找出交越频率和相位裕量�使用Excel补偿器设计工具2ClicktoeditMastertitlestyle电源转换器拓扑降压/•降压/隔离正激式升压•升压降压-升压/•反转极性/隔离反激式3ClicktoeditMastertitlestyle电源转换器拓扑降压/L正激式VINVO
2、UTVOUT=VIN⋅DBuckConverterL升压NSVINNPNSVOUTVOUT=VIN⋅D⋅NPForwardConverter降压-升压/反激式4ClicktoeditMastertitlestyle电源转换器拓扑降压/正激式LVIN1升压VOUTVOUT=VIN⋅1−DBoostConverter降压-升压/反激式5ClicktoeditMastertitlestyle电源转换器拓扑降压/正激式DVINL-VOUTVOUT=VIN⋅1−DBuck-BoostConverter升压DNSVINNPNS
3、VOUTVOUT=VIN⋅⋅1−DNPFlybackConverter降压-升压/反激式6ClicktoeditMastertitlestyle极点/零点回顾单个极点单个零点反相零点(InvertedZero)右半平面零点共轭复极点7ClicktoeditMastertitlestyle单个极点200-20-40-60MAGNITUDE(dB)101001,00010,000100,0001,000,0001FREQUENCY(Hz)H(s)=s1+45ωP0-45-90PHASE(°)-135101001,000
4、10,000100,0001,000,000FREQUENCY(Hz)8ClicktoeditMastertitlestyle单个零点6040200-20MAGNITUDE(dB)101001,00010,000100,0001,000,000sFREQUENCY(Hz)1+ωZH(s)=135190450PHASE(°)-45101001,00010,000100,0001,000,000FREQUENCY(Hz)9ClicktoeditMastertitlestyle反相零点6040200-20MAGNITUD
5、E(dB)101001,00010,000100,0001,000,000ωZFREQUENCY(Hz)1+sH(s)=4510-45-90PHASE(°)-135101001,00010,000100,0001,000,000FREQUENCY(Hz)10ClicktoeditMastertitlestyle右半平面零点6040200-20MAGNITUDE(dB)101001,00010,000100,0001,000,000sFREQUENCY(Hz)1−ωZH(s)=4510-45-90PHASE(°)-1
6、35101001,00010,000100,0001,000,000FREQUENCY(Hz)11ClicktoeditMastertitlestyle共轭复极点200Q=2Q=1-20Q=0.5-40Q=0.25-60MAGNITUDE(dB)101001,00010,000100,0001,000,0001FREQUENCY(Hz)H(s)=2ss1++Q⋅ω2OOωO900Q=2Q=1-90Q=0.5-180Q=0.25PHASE(°)-270101001,00010,000100,0001,000,000F
7、REQUENCY(Hz)12ClicktoeditMastertitlestyle控制环路基础知识环路补偿介绍理想的控制环路实用的反馈理论13环路补偿介绍ClicktoeditMastertitlestylePowerStage:LoadVINInductor/TransformerVOUTPowerSwitchesModulatorVCTestCompensationSignal环路增益是以反馈环路为中心的增益，由误差放大器增益和功率级增益部分组成。ErrorAmpREF14ClicktoeditMasterti
8、tlestyle理想的控制环路801806013540902045GAIN(dB)PHASE(°)00-20-45101001,00010,000100,0001,000,000FREQUENCY(Hz)15实用的反馈理论ClicktoeditMastertitlestyle交越频率相位裕量•控制环路的带宽决定了环路对于某种•需要充足的相位裕量以避免发生振荡
