crowbar,電撬的產(chǎn)生及其影響???
哪位老兄解釋一下電撬的產(chǎn)生及其影響??
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CROWBAR(in DC-DC CONVERTER)
An overvoltage protection circuit which monitors the
output voltage of a power supply and rapidly creates
a low resistance path across the output when a
predetermined voltage is exceeded.過(guò)壓保護(hù)電路,監(jiān)測(cè)輸出電壓,當(dāng)輸出電壓超過(guò)標(biāo)稱值的時(shí)候迅速在輸出端產(chǎn)生一個(gè)低阻抗通路;
An overvoltage protection circuit which monitors the
output voltage of a power supply and rapidly creates
a low resistance path across the output when a
predetermined voltage is exceeded.過(guò)壓保護(hù)電路,監(jiān)測(cè)輸出電壓,當(dāng)輸出電壓超過(guò)標(biāo)稱值的時(shí)候迅速在輸出端產(chǎn)生一個(gè)低阻抗通路;
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@b.r.g.j.wallace航天電源
CROWBAR(inDC-DCCONVERTER)Anovervoltageprotectioncircuitwhichmonitorstheoutputvoltageofapowersupplyandrapidlycreatesalowresistancepathacrosstheoutputwhenapredeterminedvoltageisexceeded.過(guò)壓保護(hù)電路,監(jiān)測(cè)輸出電壓,當(dāng)輸出電壓超過(guò)標(biāo)稱值的時(shí)候迅速在輸出端產(chǎn)生一個(gè)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(shí)候相對(duì)于電源來(lái)說(shuō)是個(gè)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(shí)候相對(duì)于電源來(lái)說(shuō)是個(gè)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(shí)候相對(duì)于電源來(lái)說(shuō)是個(gè)電撬???
輸出LC發(fā)生串連諧振的時(shí)候,對(duì)電源來(lái)說(shuō)是個(gè)“電撬”,所以差模濾波器的諧振頻率不能落到控制環(huán)路之內(nèi)??
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