Author Topic: 3 phase to DC regulator SCR vs Bridge with buck stage  (Read 239 times)

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Offline Miyuki

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3 phase to DC regulator SCR vs Bridge with buck stage
« on: July 17, 2021, 07:56:48 pm »
Hi just wonder what is a better solution those days.
I need moderate power 2-4kW with about half the voltage sux pulse rectifier give me.

Is there any reason to use SCR with plenty of low speed switching noise and terrible waveform? When is available (hopes so  ::) )  IGBTs and SiC for small buck stage with easy to filter ripple.
 

Online T3sl4co1l

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Re: 3 phase to DC regulator SCR vs Bridge with buck stage
« Reply #1 on: July 17, 2021, 08:19:07 pm »
I mean if you need something simple and done, SCRs probably aren't a bad idea still.  The electronics can even be fairly compact... save for the stonking huge choke you need after it.

If you need anything at all -- compact [overall] size, PFC, higher efficiency, faster load response -- it's got to be a modern-conventional design, some combination of PFC and buck or inverter stage.

Tim
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Electronic design, from concept to prototype.
Bringing a project to life?  Send me a message!
 

Online trobbins

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Re: 3 phase to DC regulator SCR vs Bridge with buck stage
« Reply #2 on: July 18, 2021, 12:28:42 pm »
Miyuki, you haven't identified why the waveform is a concern?  It sound like you have an existing SCR regulator that provides a DCV level that is half the what a simple diode bridge would provide - if so then is that regulator not performing properly?
 


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