lifted club cars - lifted ezgo
Home FAQDonate Who's Online
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Electric EZGO
Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV.



Post New Thread  Reply
 
Thread Tools Display Modes
Old 11-18-2011, 06:44 PM   #21
yurtle
Gone Mad
E-Z-GO
 
Join Date: Oct 2009
Location: Buford, GA
Posts: 8,988
Default Re: 84 Marathon resistor cart project

Quote:
Originally Posted by yurtle View Post
I often listen to my buggy radio in the garage while it's on the charger with no buzz at all.

How did you determine the capacitance of a gell cell?
Actually, it's the radio that has "no buzz at all".
yurtle is offline   Reply With Quote
Alt Today
BGW

Golf car forum Sponsored Links

__________________
This advertising will not be shown in this way to registered members.
Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum
   
Old 11-18-2011, 07:14 PM   #22
JohnnieB
Techno-Nerd
 
JohnnieB's Avatar
E-Z-GO
 
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
Default Re: 84 Marathon resistor cart project

Quote:
Originally Posted by yurtle View Post
................How did you determine the capacitance of a gell cell?
Determined rise angle (Calculated from the rise time of the most linear portion) of the leading edge of square waves while substituting capacitors with known, but much smaller, values and extrapolated.

Not precise, but definitely ballpark.
JohnnieB is offline   Reply With Quote
Old 11-18-2011, 07:53 PM   #23
yurtle
Gone Mad
E-Z-GO
 
Join Date: Oct 2009
Location: Buford, GA
Posts: 8,988
Default Re: 84 Marathon resistor cart project

Quote:
Originally Posted by JohnnieB View Post
Determined rise angle (Calculated from the rise time of the most linear portion) of the leading edge of square waves while substituting capacitors with known, but much smaller, values and extrapolated.

Not precise, but definitely ballpark.
Thanks.

I know I'm WAY off-topic, but I've always wanted to know how much energy my pack held. My eight T-105s weigh in at 496 pounds.

I have three, 150 pound, 10 kV, 100 uf caps. At .5CV^2, that's 15 kJ, which is enough to do some serious pulse discharge mad science.

It'd be kewl to be able to do this from my buggy pack, though I'm not sure I'd want to subject my batteries to this kind of abuse.
Attached Images
File Type: jpg 100_mF_10kV_Maxwells1.jpg (17.5 KB, 7 views)
File Type: jpg 100_mF_10kV_Maxwells2.jpg (23.7 KB, 8 views)
File Type: jpg coin4.jpg (21.7 KB, 9 views)
File Type: jpg coin6.jpg (32.6 KB, 8 views)
yurtle is offline   Reply With Quote
Old 11-18-2011, 11:09 PM   #24
Gonkulor
Astronautilator
 
Gonkulor's Avatar
E-Z-GO
 
Join Date: Sep 2011
Location: North Idaho
Posts: 1,494
Default Re: 84 Marathon resistor cart project

I'm lost.

Gorno I need one of your tinfoil hats.

If..... I..... ... ... could only..... reach....... my utility....... belt.

The mad scientist in me keeps me checking the updates.
Gonkulor is offline   Reply With Quote
Old 11-19-2011, 12:20 AM   #25
rlw
Gone Wild
E-Z-GO
 
Join Date: Oct 2011
Location: Southeast Ohio -- "The Toenails of the Foothills of Appalachia"
Posts: 232
Default Re: 84 Marathon resistor cart project

Bet none of you guys have a 120V->30kV xfrmr like *I* do. Inherited from my dear departed dad. We used to set it up as a Jacob's ladder and mystify the kids. Probably full of PCB-laced oil, I've got a mini-superfund site in my garage.

Let's see - run the batt pack into one of the APC UPSs from the piles in the basement to make 120V. UPS output goes to 30kV xfrmr. Jacob's ladder on the back of the cart, made from 2 quarter-wave CB antennas (11 meters/4 = 3.6667 meters) - 2" separation at bottom, 12" at top. Drive down the road, hitting the "energize" button (big and RED), screaming "Bwah-hah-hah-hah-hah!!!!".

Talk about a mad scientist experiment!

You can make a tin foil hat from aluminum foil - much easier to come by than tin foil!

... but I'm getting ahead of myself. Calm down. Step AWAY from the 30kV transformer. Need to build a battery rack first.

I miss my dad - he was a genius at batteries and motors (among other things - he was a hell of a Scrabble (tm) player, too). He'd be my go to guy for battery rejuvenating and motor rewinding. He'd have loved the banter in this forum, too.


RLW
rlw is offline   Reply With Quote
Old 11-19-2011, 04:49 AM   #26
yurtle
Gone Mad
E-Z-GO
 
Join Date: Oct 2009
Location: Buford, GA
Posts: 8,988
Default Re: 84 Marathon resistor cart project

Quote:
Originally Posted by rlw View Post
Bet none of you guys have a 120V->30kV xfrmr like *I* do.

<snip>

Let's see - run the batt pack into one of the APC UPSs from the piles in the basement to make 120V. UPS output goes to 30kV xfrmr. Jacob's ladder on the back of the cart, made from 2 quarter-wave CB antennas (11 meters/4 = 3.6667 meters) - 2" separation at bottom, 12" at top. Drive down the road, hitting the "energize" button (big and RED), screaming "Bwah-hah-hah-hah-hah!!!!".

Talk about a mad scientist experiment!

<snip>

RLW
At 120 volts (60 Hz), I'm limited to 25 kV AC.

If you count Tesla coils, I got you beat, at several hundred kV.

Besides being able to blow things up (or shrink them), I'd like to be able to power this by the campfire next to our subdivision lake. The largest inverter I have is only 750 Watts. I need at least 3,000 Watts to power my little toy.

BTW, I use green for energize and a red mushroom for stop.
Attached Images
File Type: jpg sparks.jpg (36.9 KB, 10 views)
yurtle is offline   Reply With Quote
Old 11-19-2011, 08:27 AM   #27
JohnnieB
Techno-Nerd
 
JohnnieB's Avatar
E-Z-GO
 
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
Default Re: 84 Marathon resistor cart project

Quote:
Originally Posted by yurtle View Post
............I know I'm WAY off-topic, but I've always wanted to know how much energy my pack held. My eight T-105s weigh in at 496 pounds............
Approximately 39.2 Megajoules; Or about the same energy contained in 30 foot-long Subway Club Sandwiches.

FWIW: This is based on the energy density of Lead-Acid batteries being 146kJ/kg, which takes into account the mass of container holding the chemistry and the internal support structures.
The energy density of chemistry itself is about 173kJ/kg.
JohnnieB is offline   Reply With Quote
Old 11-19-2011, 09:50 AM   #28
scottyb
Happy Carting
 
scottyb's Avatar
E-Z-GO
 
Join Date: Dec 2007
Location: Southern California
Posts: 73,358
Default Re: 84 Marathon resistor cart project



This is some CRAZY (brown stuff) right there
scottyb is online now   Reply With Quote
Old 11-19-2011, 10:32 AM   #29
rlw
Gone Wild
E-Z-GO
 
Join Date: Oct 2011
Location: Southeast Ohio -- "The Toenails of the Foothills of Appalachia"
Posts: 232
Default Re: 84 Marathon resistor cart project



OK, Yurtle - you win. Tesla beats 30 kV transformer!

As a newbie to this forum, I've learned my lesson - "Never try to one-up anyone! You'll get smacked down!"

RLW
rlw is offline   Reply With Quote
Old 11-19-2011, 10:52 AM   #30
scottyb
Happy Carting
 
scottyb's Avatar
E-Z-GO
 
Join Date: Dec 2007
Location: Southern California
Posts: 73,358
Default Re: 84 Marathon resistor cart project

Isn't that the truth?
It's the internet.
Real or imagined, there is always somebody who knows better
scottyb is online now   Reply With Quote
Reply

Tags
1984, marathon, project, resistor, series
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Electric EZGO


Thread Tools
Display Modes


Similar Threads
Thread Forum
Marathon resistor cart conversion Electric EZGO
1983 EZGO Marathon Resistor Cart - Which Solenoid? Electric EZGO
new project 36v resistor cart? Electric Club Car
1977 EZ-GO Marathon Project Cart Golf Carts and Parts
Marathon Parts Cart or Project Golf Carts and Parts


All times are GMT -5. The time now is 05:26 PM.


Club Car Electric | EZGO Electric | Lifted Golf Carts | Gas EZGO | Used Golf Carts and Parts

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
This Website and forum is the property of Buggiesgonewild.com. No material may be taken or duplicated in part or full without prior written consent of the owners of buggiesgonewild.com. © 2006-2017 Buggiesgonewild.com. All rights reserved.