Idea for regulate a DC with noise-Help

Dec 06, 2008 0 Replies

What can be a good solution for lowering a DC with high spyke tension?



Here there is the waveform of a DC bus with no load and with load and a capacitive filter.



My problem is that with no load i've a dc of about 200 volt plus a simil sawtooth that arriveat 350 volt.



With load sawtooth decrease. I want to reduce the sawtooth to 250 volt also withou load.



What can i use?



I can dissipate power but a good thing would be dissipate minimum as possible. So no pass regulator but a simple swithinf step down? Or what other idea? Thanks in advabce for any help


Here waveform:

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