Model Boat Mayhem

Technical, Techniques, Hints, and Tips => The "Black Arts!" ( Electrics & Electronics ) => Topic started by: david48 on April 25, 2014, 10:06:03 am

Title: Motor Suppresion
Post by: david48 on April 25, 2014, 10:06:03 am

I have a motor out of a camera it's from the film wind it's rpm is ok for the radar drive ,please can any one tell me how I work out what suppressor to use .The camera used 2  1.5 v batts.. It is 12 mm dia. 30mm long  no other info just a date stamp maby I need to know how many amps it pulls.
Thank you
David building Fairmount Alpine.

Title: Re: Motor Suppresion
Post by: Tug-Kenny RIP on April 25, 2014, 10:11:31 am

That is quite a small motor. I would imagine the current drawn is very low. Probably under half an amp so I would not worry about suppression until you notice any interference.
A standard set of capacitors across the terminals would probably be in the PicoFarad range.

Hope this helps

ken

Title: Re: Motor Suppresion
Post by: david48 on April 25, 2014, 10:17:27 am

Thank you for your help ,just have to make a plan to fit it
David

Title: Re: Motor Suppresion
Post by: inertia on April 25, 2014, 12:30:52 pm

David
My experience with small motors is that a 0.1uF ceramic disc capacitor across the two motor terminals generally fixes any RF problems.
DM

http://www.maplin.co.uk/p/decoupling-ceramic-disc-01uf-capacitor-n43cj (http://www.maplin.co.uk/p/decoupling-ceramic-disc-01uf-capacitor-n43cj)