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reciever voltage - 8/28/2008 5:18:19 AM   
cjrushing


 

Posts: 5
Joined: 8/28/2008
From: , MO, USA
Status: offline 		I'm new to electric flight. I know a little but still have some questions.
What protects the reciever from the higher voltages of the Lipo type battery packs?
       Post #: 1

RE: reciever voltage - 8/28/2008 6:07:44 AM   
jdetray



Posts: 1256
Joined: 12/7/2004
From: Napoleon, OH, USA
Status: offline 		In electric flight setups, you never plug the main flight battery directly into the receiver. In a typical small electric plane, you plug the battery into the electronic speed controller (ESC), then plug the ESC into the throttle channel of the receiver. The ESC contains a battery eliminator circuit (BEC) that regulates the battery voltage down to a level that is safe for the receiver. The 3-wire cable connecting the ESC to the receiver carries the regulated voltage to the receiver in its center conductor.

In some larger electric planes, you might use a separate battery of the appropriate voltage (4.8-6.0V) just for the receiver and servos. In such a plane, you would disable the BEC in the ESC. The disadvantage of this arrangement is that the plane must carry the weight of two battery packs. It is usually not practical for small planes.

A third possibility is to use just one main battery but connect it to both the ESC and to a separate standalone BEC. This arrangement is used where you want to use only one battery but the BEC built into the ESC can not handle the current required by the receiver and servos. You disable the BEC in the ESC and let the standalone BEC provide power for the receiver and servos. The standalone BEC is lighter than a second battery pack.

- Jeff

< Message edited by jdetray -- 8/28/2008 6:08:08 AM >

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(in reply to cjrushing)
       Post #: 2

RE: reciever voltage - 8/28/2008 7:52:59 AM   
cjrushing


 

Posts: 5
Joined: 8/28/2008
From: , MO, USA
Status: offline 		Jeff
Thanks, I wasn't aware the esc had a battery regularot built into it.

Thanks again.

Jim

(in reply to jdetray)
       Post #: 3

RE: reciever voltage - 9/11/2008 9:44:04 PM   
-pkh-



Posts: 2529
Joined: 5/28/2004
From: Emmaus, PA, USA
Status: online 		Most of the smaller (i.e. lower current/voltage) ESCs do. The manual for the ESC should state if it has a BEC and give you a current limit for it and/or max # of servos you can run off of it with different battery pack voltages. Most of the high voltage/current ESCs do not have BECs and you must use a separate receiver pack or a separate BEC/regulator to power the receiver.

_____________________________

Paul - Helis: Two Raptor 50V2s, Venture 30CP, Blade CX2
Planes: Twist 150, Twist 60, Tribute 36, GP .40 Mustang

(in reply to cjrushing)
       Post #: 4

RE: reciever voltage - 9/17/2008 6:15:18 PM   
cjrushing


 

Posts: 5
Joined: 8/28/2008
From: , MO, USA
Status: offline
I'VE BEEN OUT OF TOWN FOR A BIT. SORRY I DIDN'T GET BACK TO YOU ASAP.

I WAS DOWN IN TEXAS W IKE.

THANKS FOR THE INFO.

JIM

(in reply to -pkh-)
       Post #: 5

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