The EMC shielding material reduce magnetic interference that is good to ArduCpoter3.0.

Measurement of magnetic interference becomes half by 60micron meter low-loss,high permeability nano-crystalline material.

Without magnetic shield

Magnetic shield applied

Magnetic shield material is Hitachi FINMET low-loss,high permeability nano-crystalline material.

http://www.hitachi-metals.co.jp/e/prod/prod02/p02_03.html

Similar material from 3M™ High Permeability Magnetic Shielding Sheet 1380 will also work.

Views: 9788


Admin
Comment by Thomas J Coyle III on June 25, 2013 at 5:45am

The 3M material can be purchased as thin sheets on eBay: http://www.ebay.com/itm/160613440162?ssPageName=STRK:MEWAX:IT&_...

Regards,

TCIII

Comment by Jiro Hattori on June 25, 2013 at 5:53am

The weight of the film (95mm x 55mm) is about 1.5 gram without adhesive.

Comment by Ken Falk on June 25, 2013 at 7:13am

Where can I buy the thin film without adhesive:)?


Admin
Comment by Thomas J Coyle III on June 25, 2013 at 7:52am

@Ken,

If you are not concerned about weight, buy the 3M sheet and do not take the backing off the adhesive side.

Regards,

TCIII

Comment by Ken Falk on June 25, 2013 at 8:05am

@Thomas,

Thanks, but weight is really a priority:). I'm prototyping long flight duration multicopters where low weight is a key ingredient.

Comment by Aurelio R. Ramos on June 25, 2013 at 10:25am

how does this compare to, say, copper tape connected to ground?

Comment by Dave on June 25, 2013 at 11:30am

I am going to give this a shot. I have some interference and vibration issues that Oliver pointed out. Hopefully it will be as simple as putting a piece of this under some moongel and putting the APM on top of that.

Comment by Scott Reid on June 25, 2013 at 1:20pm

Does anyone know what components actually are responsible for creating most of the magnetic interference?  Is it the DC power cables, ESCs, motor cables, or the motors themselves?    Wondering if it's worth trying to twist DC cabling where possible.

Comment by Francis Ignacio on June 25, 2013 at 1:34pm

@Scott, All of the above.


Developer
Comment by John Arne Birkeland on June 25, 2013 at 1:40pm

Magnetic interference are low frequency (DC) fields. The main source of such noise in a copter then obviously is the DC power cables drawing high currents and the battery. Twisting the DC power cables should help.

ESC and motor phase wires generate high frequency AC fields, and are to my knowledge not problematic (within reason) for sensors. This is also why a normal conductive material like copper tape will not help. A conductive shield (Faraday cage) will only block AC fields and not a static DC field.

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