New Products Flash Sale
Thread Tools
Old Jul 03, 2015, 06:52 PM
starzak is offline
Find More Posts by starzak
Tye
Chacotoma, NM
Joined Jan 2004
880 Posts
Discussion
Emax BL 2205/22 Question ?

The Emax BL 2205/22 is only rated for a 2S LiPo, but I have read here about people using it on a 3S LiPo. Does anyone have any personal experience using this motor on 3S ? ? ?



zak
starzak is offline Find More Posts by starzak
Reply With Quote
Sign up now
to remove ads between posts
Old Jul 04, 2015, 09:34 AM
Ron van Sommeren is offline
Find More Posts by Ron van Sommeren
homo ludens modellisticus
Ron van Sommeren's Avatar
Netherlands, GE, Nijmegen
Joined Feb 2001
11,899 Posts
You'd have to prop down, motorcurrent is proportional to voltage squared (and Kv cubed). Simple instructive table giving the extra current when you add one extra cell to a pack
www.rcgroups.com/forums/showt...0#post27889754

(a.k.a. "why did my motor and/or controller and/or battery go up in smoke ??? )

A 10% change in battery voltage will give a 20% change in current, a 10% change in Kv will give a 30% increase. Not quite, because battery voltage will sag more due to higher current, but you'll get the idea.

Our RC voltages by themselves don't kill motors, wire insulation can stand up to 200volt. Current kills, creates heat, volts only jolt.

Motor must be able to handle the rpm though. According to www.flybrushless.com/motor/view/160 Kv = 1940rpm/volt. On 3s it would do about 24krpm, about 30% less with prop.

Controller must be able to drive your motor at that rpm, processor/computationwise.
Table giving max. rpm per make/type controller, per number of magnetpoles
www.bavaria-direct.co.za
→ More info
→ ESC Max. RPM Limits (below winding diagram table)

Prettig weekend Ron
Ron van Sommeren is offline Find More Posts by Ron van Sommeren
Last edited by Ron van Sommeren; Jul 04, 2015 at 09:53 AM.
Reply With Quote


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold EMAX 2205/22 Motor RustyT3FT Aircraft - Electric - Power Systems (FS/W) 1 Oct 30, 2014 07:45 PM
For Sale NIB 2-Emax 2805 and 1-Emax 2205/22 roberted5 Aircraft - Electric - Power Systems (FS/W) 0 Sep 11, 2012 12:21 PM
Discussion Emax BL 5345 brushless motor question. margaret.roberts Power Systems 4 Aug 27, 2008 08:22 AM
Sold emax cf 2205 rct Aircraft - Electric - Power Systems (FS/W) 4 Jan 08, 2008 09:09 PM
For Sale GWS 2205 outrunner + GWS 15A BL PLD Aircraft - Electric - Power Systems (FS/W) 0 Jan 16, 2006 02:29 AM