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Forum Index : Electronics : EG8030 and EGS031 board. A 3 phase version of the EG8010

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Haxby

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Joined: 07/07/2008
Location: Australia
Posts: 423

Posted: 07:19am 05 May 2022

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I stumbled across the EG8030 while browsing Ali express. It's the 3 phase version of the EG8010. It has 6 outputs to drive 3 half bridges, which in turn drive 3 legs of a Delta wired 3 phase transformer.

Does anyone here have one going? I'd imagine it needs 3 chokes, one on each leg. I wonder if it would have problems regulating each phase if one of the phases was loaded more than the other two.

No chokes on the output are pictured in the example diagram, but that doesn't mean much. The output caps are there. I suppose each of the phases is driven by SPWM. Anyway I bought the EGS031 board so I'll have a play with it in a month or 2.

Edited 2022-05-05 17:20 by Haxby

Revlac

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Joined: 31/12/2016
Location: Australia
Posts: 1142

Posted: 07:42am 05 May 2022

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I remember looking at this 3 phase unit back in 2016, thought it quite interesting.
Since then, poida's Arduino mega 2560 version got my attention, still gathering parts for it.

Cheers Aaron
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poida

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Joined: 02/02/2017
Location: Australia
Posts: 1432

Posted: 09:42am 05 May 2022

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looking at the schem, it appears there are 3 individual Vfb for each phase.
This would probably handle uneven loads, assuming well designed primary:secondary ratio
on the transformers.
I've seen it work in youtube videos.

I've now playing with the STM32F103 Blue Pill and 3 phase PWM output.
Sort of 2 steps forward, 1 step back at this time.
I much prefer the Mega 2560 since it is rock solid and runs like a clock.

wronger than a phone book full of wrong phone numbers

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