R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 06-05-2004, 07:13 AM   #1
Tech Initiate
 
Join Date: Feb 2004
Posts: 48
Default Extra Wire from Battery pack to Motor?

I was reading the "Hot Tourers" article in the newest Car Action magagzine. I noticed on the Shumacher, as well as others, the pics show the standard red (positve) and black (negative) wires off the battery pack going to the ESC.

There is also an extra red wire going directly from the battery pack to the positive lead on the motor. What is this, and why is it done?

THank you
atlrcracer is offline   Reply With Quote
Old 06-05-2004, 07:25 AM   #2
Tech Master
 
Super Steve's Avatar
 
Join Date: Oct 2003
Location: Toronto, Ontario, Canada
Posts: 1,177
Trader Rating: 9 (100%+)
Send a message via AIM to Super Steve
Default

battery power is not going to it, the battery is receiving electrons from the motor and esc
Super Steve is offline   Reply With Quote
Old 06-05-2004, 07:33 AM   #3
Tech Initiate
 
Join Date: Feb 2004
Posts: 48
Default

Sure....that is correct...but then why is there the extra wire directly from the battery pack lead to the motor, by-passing the esc?
atlrcracer is offline   Reply With Quote
Old 06-05-2004, 07:41 AM   #4
Tech Master
 
Super Steve's Avatar
 
Join Date: Oct 2003
Location: Toronto, Ontario, Canada
Posts: 1,177
Trader Rating: 9 (100%+)
Send a message via AIM to Super Steve
Default

it's not battery to the motor it's motor to battery...

Why would electrons need to flow through the esc to go back to the batteries? ESC just needs to control electrons going in (negative)

All reverse is set up with 4 wire leds from esc and highend forwards are set with 3 wires.

the positive wire from esc to battery is to get rid of electrons that ESC used and the positive wire from motor is the circulate the electrons the motor used...
Super Steve is offline   Reply With Quote
Old 06-05-2004, 07:41 AM   #5
Company Representative
 
Tres's Avatar
R/C Tech Charter Subscriber
 
Join Date: Oct 2001
Location: WWW.TNT-FX.COM
Posts: 3,403
Trader Rating: 14 (100%+)
Default

an esc only switches the NEG. side of the motor, not the positive wire.

The positive from the batt. goes direct to the motor & esc.
__________________
Tre's
TnT-Fx Custom Graphics
www.tnt-fx.com
Tres is offline   Reply With Quote
Old 06-05-2004, 10:27 AM   #6
Tech Initiate
 
Join Date: Feb 2004
Posts: 48
Default

ok...but what is the advantage of doing this?
atlrcracer is offline   Reply With Quote
Old 06-05-2004, 11:06 AM   #7
Tech Initiate
 
Join Date: Feb 2004
Posts: 48
Default

Here is the picture i am referring to.

atlrcracer is offline   Reply With Quote
Old 06-05-2004, 12:42 PM   #8
Tech Regular
 
SlobbaTech's Avatar
 
Join Date: Jun 2003
Posts: 423
Default

All or most speedos you can see the red wires are all one wire and like Tres said, there's nothing stopping motor from getting + juice. Just on that picture you have it looks like they have something going on when it's same standard wiring setup but just looks different b/c where the 2 red wires join is on the battery now instead of being splined. it's not different than anything else out there other than ascetics.
SlobbaTech is offline   Reply With Quote
Old 06-05-2004, 01:07 PM   #9
Tech Initiate
 
Arthur's Avatar
 
Join Date: Jul 2003
Posts: 46
Default

Just saying the same thing but putting it another way...

The only reason there is a +ve/red wire from the battery to the esc is to give the esc power, nothing to do with powering the motor.
Arthur is offline   Reply With Quote
Old 06-05-2004, 02:03 PM   #10
Tech Champion
 
JayBee's Avatar
 
Join Date: Mar 2004
Location: 12TH-MAN COUNTRY
Posts: 6,813
Trader Rating: 31 (100%+)
Post

That's a sweet way to do it; never thought of that
JayBee is offline   Reply With Quote
Old 06-05-2004, 05:16 PM   #11
Tech Addict
 
Neil's Avatar
 
Join Date: Oct 2003
Location: me..me..me
Posts: 583
Send a message via MSN to Neil
Default

The only drawback to that setup would be you have to soldier 3 wires instead of 2 when changing packs.
Neil is offline   Reply With Quote
Old 06-05-2004, 05:20 PM   #12
Tech Initiate
 
Join Date: Feb 2004
Posts: 48
Default

I guess I am still not getting it......BUT WHY?

Why would you do that?
atlrcracer is offline   Reply With Quote
Old 06-05-2004, 05:28 PM   #13
Tech Elite
 
Herminator's Avatar
 
Join Date: Sep 2002
Location: England
Posts: 2,280
Send a message via ICQ to Herminator
Default

The positive side of the speedo, motor and cells all need to be connected somewhere. Lots of people have a T junction somewhere near the motor or speedo, or have a wire going from the speedo to the motor then the cells. Here ther've simply made the "junction" at the cells, which is what a lot of speedo manuals tell you to do but often it's neater to make the junction at the motor. With the two wires to the cells, theoreticly there is a bit less resistance.
Herminator is offline   Reply With Quote
Old 06-05-2004, 06:07 PM   #14
Tech Initiate
 
Join Date: Feb 2004
Posts: 48
Default

Ok..now I might be stupid here...but from what i have seen on ESC...there are 4 wires coming out:

Pair for battery

Pair for motor.

dont get me wrong..i am just trying to figure out the benefit or why you would do it like this.

Thanks guys
atlrcracer is offline   Reply With Quote
Old 06-05-2004, 06:27 PM   #15
Tech Adept
 
Join Date: May 2003
Posts: 199
Default

On most higher-end escs, the negative wire for both the battery and the motor is doubled up to have a total of 3 wires. That's what is happening in the picture you provided, except that is even a different way than how most of us are used to. Most usually cut a small part of the insulation off in the middle and solder an extension onto the one negative wire, creating one total unit with leads to the battery and motor. The picture has 4 wires total and does the exact same job, it is just a different way of doing it. Both allow for less electrical resistance and more efficiency. Lower-model escs have 4 wires like you described.
aviaar is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
RC 18T MINI MOD MOTOR AND BATTERY PACK drew840 R/C Items: For Sale/Trade 8 03-25-2008 11:31 AM
ESC/Motor/Battery pack for F201 k617nu-b Electric On-Road 4 05-15-2006 08:54 PM
LOSI BK2 ,SERVO,BATTERY PACK, AND MOTOR hotwheels1 R/C Items: For Sale/Trade 3 03-26-2006 11:48 PM
Mini Quake w/radio and extra battery pack F/S... Darkseid R/C Items: For Sale/Trade 3 07-17-2005 08:26 PM
Mod Motor/Servos/Battery Pack 4 Sale RC Oval Racer R/C Items: For Sale/Trade 0 07-11-2004 01:18 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 09:19 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net