crowbar,電撬的產生及其影響???
哪位老兄解釋一下電撬的產生及其影響??
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@b.r.g.j.wallace航天電源
CROWBAR(inDC-DCCONVERTER)Anovervoltageprotectioncircuitwhichmonitorstheoutputvoltageofapowersupplyandrapidlycreatesalowresistancepathacrosstheoutputwhenapredeterminedvoltageisexceeded.過壓保護電路,監測輸出電壓,當輸出電壓超過標稱值的時候迅速在輸出端產生一個低阻抗通路;
The DM filter natural frequency should not be set
inside the control loop band width of the power
supply to avoid instability. This is because the output
filter appears to the power supply as a series resonant
circuit and will act as a crowbar on the output at
its natural frequency.為什么輸出濾波器在自然頻率時候相對于電源來說是個電撬???
inside the control loop band width of the power
supply to avoid instability. This is because the output
filter appears to the power supply as a series resonant
circuit and will act as a crowbar on the output at
its natural frequency.為什么輸出濾波器在自然頻率時候相對于電源來說是個電撬???
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@b.r.g.j.wallace航天電源
TheDMfilternaturalfrequencyshouldnotbesetinsidethecontrolloopbandwidthofthepowersupplytoavoidinstability.Thisisbecausetheoutputfilterappearstothepowersupplyasaseriesresonantcircuitandwillactasacrowbarontheoutputatitsnaturalfrequency.為什么輸出濾波器在自然頻率時候相對于電源來說是個電撬???
輸出LC發生串連諧振的時候,對電源來說是個“電撬”,所以差模濾波器的諧振頻率不能落到控制環路之內??
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