Editing EMI suppression cores
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− | [[File:Ferrirebeads.jpg|thumb|Snap | + | [[File:Ferrirebeads.jpg|thumb|Snap on ferrite beads]] |
− | [[File:Ferritebead.jpg|thumb|Toroidal ferrite | + | [[File:Ferritebead.jpg|thumb|Toroidal ferrite bead]] |
− | EMI suppression cores | + | EMI suppression cores a.k.a. ferrite beads are an efficient way to reduce high frequency interference from wiring. Adding ferrute beads to signal & power wiring is recommended if signal reliability problems are encountered. |
==Selection== | ==Selection== | ||
− | For motor control applications it is recommended to get low to medium frequency ferrite | + | For motor control applications it is recommended to get low to medium frequency ferrite beads for maximum efficiency. |
− | ;Preferred | + | ;Preferred choices |
*Core material designed for low to medium frequency bands (attenuation between 1-300 MHz) | *Core material designed for low to medium frequency bands (attenuation between 1-300 MHz) | ||
*Large enough to fit cable multiple rounds through it | *Large enough to fit cable multiple rounds through it | ||
− | ;Avoid | + | ;Avoid |
*Core material designed for high frequency bands (above 300 MHz) | *Core material designed for high frequency bands (above 300 MHz) | ||
− | *Inductor cores | + | *Inductor cores - will just add inductance and make things worse |
*Iron powder cores | *Iron powder cores | ||
− | + | Most ferrite & iron powder cores look same. So if unsure about material properties, its most safe bet to purchase low to medium frequency beads from distributors such as: | |
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*Digikey | *Digikey | ||
*Mouser | *Mouser | ||
*Farnell | *Farnell | ||
− | Some popular ferrite | + | Some popular ferrite bead brands: |
* Laird-Signal Integrity Products | * Laird-Signal Integrity Products | ||
− | * Fair | + | * Fair rite |
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==See also== | ==See also== | ||
*[[Wikipedia:Ferrite bead]] | *[[Wikipedia:Ferrite bead]] | ||
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