servo drive

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7 years 9 months ago #124786 by jmelson
Replied by jmelson on topic servo drive

156v 9.5A are the servos some are more than 4kw i think 4.9kw & 5.9kw.

That works out to 1.5 KW, so the current must be the continuous rating, not the peak.
5.9 KW would require 38 A at 156 V.

Jon

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7 years 9 months ago #124792 by vre
Replied by vre on topic servo drive
look some motor plates
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7 years 9 months ago #124798 by andypugh
Replied by andypugh on topic servo drive
gitter.im/rene-dev/stmbl?at=5c4a6df6746d4a677a084b11

Though there is one major problem, the current design of STMBL uses a power IC which is completely unavailable. IRAM256-2067A2 (must be A2)

Octopart says that they exist but I am not sure I believe it.
octopart.com/iram256-2067a2-infineon-658...jwA-Y1RrKoEmfOlCLkfw

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7 years 9 months ago #124810 by vre
Replied by vre on topic servo drive
If you read the datasheet of iram256-2067a2
it says
Motor power range up to 1.5kW / 85~253 Vac
mouser.com/datasheet/2/196/iram256-2067a-1226764.pdf

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7 years 9 months ago #124812 by andypugh
Replied by andypugh on topic servo drive

vre wrote: If you read the datasheet of iram256-2067a2
it says
Motor power range up to 1.5kW / 85~253 Vac
mouser.com/datasheet/2/196/iram256-2067a-1226764.pdf


Yes, hard to reconcile all the numbers, isn't it?

But The IRAM is rated 20A 300V, which is 6kVA. (and 30A peak current)

But it's all a bit academic at the moment.
One good thing about the STMBL is that they cost <€100 each.

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7 years 9 months ago #124822 by bevins
Replied by bevins on topic servo drive
Cant you just find an equivalent even if the footprint is not the same I am sure an adaptor could be done so it could work, no?

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7 years 9 months ago #124824 by andypugh
Replied by andypugh on topic servo drive
It is possible to use the "A" (rather than A2) mounted on the wrong side. But then it doesn't fit in the case.

It is less trouble to redesign the HV board for a new power module. It just hasn't been done.

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7 years 9 months ago #124850 by vre
Replied by vre on topic servo drive
Next stmbl version will have separate power stage components(igbt)
that will be available/interchangable

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