On Fri, 21 Jun 2024, Viesturs L?cis wrote:
Date: Fri, 21 Jun 2024 14:08:00 +0300 From: "[UTF-8] Viesturs L?cis" <viesturs.la...@gmail.com> Reply-To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Subject: [Emc-users] Power source for 8i20Hello! I need to replace 3 servodrives (2kW, 1,5kW and 0,75kW) in Biesse retrofit and it seems that three 8i20 will have to take over those motors. The question I am trying to solve at the moment is DC supply for 8i20 and there are several points I need to address: 1) should I place rectifier bridge + capacitor for each drive separately or feed them from one source?
One source is better
2) what is suggested max ripple voltage for 8i20?
More an issue with the filter capacitors, the 8I20s current loop will track any ripple (which should be slight if you have 3 phase power)
3) do I understand correctly that rectifying 3phase 380VAC will result in something around 540VDC which exceeds 8i20 limits and I should use 1phase 230VAC (adding transformers seems to reduce AC voltage seems like unjustified cost)?
Yes, the 8I20 expects rectified 230V single phase or better, rectified 208V 3 phase. Rectifed 380VAC will cause an explosion... What are your motor voltage ratings?
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Peter Wallace Mesa Electronics _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
