I am working on an Industrial Machine with a 3-phase 5hp motor driven by a
VFD. To pass the EMC conducted emissions requirements, we had to add a RF
Line Filter that is recommended by the VFD manufacturer. This filter has
large Y-Caps. I know these currents theoretically cancel out in a balanced
s
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From: Brian Kunde
Sent: Friday, February 16, 2024 4:24 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] High Touch Current in Industrial Machinery
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Brian,
You can try a low leakage 3-phase EMI filter design. This is where your
magnetic stage(s) are unchanged and three existing large Y-caps are tied
together to form a wye configuration between phases; the center tie point
of the wye is not directly earthed. Instead, use a fourth Y-cap tied
be
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