RCCrawler Forums

dankycrawler · 12-05-2006, 04:54 PM

How do you find out the outpout voltage of a speed controller say the lrp runner or the novak xrs sport? what does bec v stand for in the speed controller specs?

JohnRobHolmes · 12-05-2006, 05:13 PM

BEC stands for Battery Eliminating Circuitry. It produces a voltage for the receiver and servos, as they generally run on a lower voltage than the main pack's.

Do you mean the rated voltage for the ESC? The output voltage will be dependant on the batteries.

dankycrawler · 12-06-2006, 11:17 AM

how about at wide open throttle on lrp runner w/ 3300mah any ballpark voltage spec?

4link4eva · 12-06-2006, 11:29 AM

If it's a six cell pack, it'll give a max output of 7.2v. Each cell on a nimh or nicd pack produces 1.2v, so multiply the number of cells by 1.2v to find your output voltage.

JohnRobHolmes · 12-06-2006, 12:19 PM

Electronic speed controllers dont regulate voltage, they regulate duty cycle. If your pack is 8 volts charged, it will give 8 volts to the motor whether you have the throttle pegged or cracked open.

What are you trying to figure out?

IRON CHEF · 12-06-2006, 03:49 PM

most of the sporty speed controls bec's are regulated at 5v-1amp, higher end esc's are rated at 6v-3 amp. Most servo torque specs are at 6v, so you wont get that 238# of torque out of a servo without 6v from the esc.

dankycrawler · 12-06-2006, 04:14 PM

thanks for all the great replies..... I cant say exactly what im trying to figure out.... but I am definetly up to something....

... if and when i figure it out i will post it up here first.

thanks again.

12-05-2006, 04:54 PM	#1
dankycrawler Quarry Creeper Join Date: Feb 2006 Location: San Jose, Ca Posts: 367	speed controller output voltage How do you find out the outpout voltage of a speed controller say the lrp runner or the novak xrs sport? what does bec v stand for in the speed controller specs?

12-05-2006, 05:13 PM	#2
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	BEC stands for Battery Eliminating Circuitry. It produces a voltage for the receiver and servos, as they generally run on a lower voltage than the main pack's. Do you mean the rated voltage for the ESC? The output voltage will be dependant on the batteries.

12-06-2006, 11:17 AM	#3
dankycrawler Quarry Creeper Join Date: Feb 2006 Location: San Jose, Ca Posts: 367	how about at wide open throttle on lrp runner w/ 3300mah any ballpark voltage spec?

12-06-2006, 11:29 AM	#4
4link4eva RCC Addict Join Date: May 2006 Location: In England, looking for the threadlock... Posts: 1,150	If it's a six cell pack, it'll give a max output of 7.2v. Each cell on a nimh or nicd pack produces 1.2v, so multiply the number of cells by 1.2v to find your output voltage.

12-06-2006, 12:19 PM	#5
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	Electronic speed controllers dont regulate voltage, they regulate duty cycle. If your pack is 8 volts charged, it will give 8 volts to the motor whether you have the throttle pegged or cracked open. What are you trying to figure out?

12-06-2006, 03:49 PM	#6
IRON CHEF Pebble Pounder Join Date: Nov 2006 Location: 303 Posts: 121	most of the sporty speed controls bec's are regulated at 5v-1amp, higher end esc's are rated at 6v-3 amp. Most servo torque specs are at 6v, so you wont get that 238# of torque out of a servo without 6v from the esc.

12-06-2006, 04:14 PM	#7
dankycrawler Quarry Creeper Join Date: Feb 2006 Location: San Jose, Ca Posts: 367	thanks for all the great replies..... I cant say exactly what im trying to figure out.... but I am definetly up to something.... ... if and when i figure it out i will post it up here first. thanks again.

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