lifted club cars - lifted ezgo
Home FAQDonate Who's Online
Go Back   Buggies Gone Wild Golf Cart Forum > Modified Golf Carts > Extreme DC!
Extreme DC! Extreme Electric Golf Carts!



Post New Thread  Reply
Thread Tools Display Modes
Unread 10-16-2018, 03:39 PM   #21
You're a daisy if you do
 
NCPW's Avatar
Club Car
 
Join Date: Sep 2015
Location: North Carolina
Posts: 2,439
Default Re: field shorting

I'd like to see how you installed this.

The runaway rpms of a series motor is always an issue in hilly terrain. So keeping a watchful right foot will always be an issue, but having a little more speed could be nice. When the field is shorted, will torque suffer just as if an aftermarket speed motor were installed?
NCPW is online now   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
   
Unread 10-16-2018, 03:51 PM   #22
Not Yet Wild
 
Join Date: Apr 2011
Location: Goodyear, AZ
Posts: 15
Default Re: field shorting

Quote:
Originally Posted by NCPW View Post
I'd like to see how you installed this.

The runaway rpms of a series motor is always an issue in hilly terrain. So keeping a watchful right foot will always be an issue, but having a little more speed could be nice. When the field is shorted, will torque suffer just as if an aftermarket speed motor were installed?
Those carts are out on rent right now. When one gets back I will take some pictures. It is very simple. The solenoid is mounted on plate next to horn in front of 12V fuse panel. The hardest part is mounting the micro switch. I added a switch to turn off field short labeled Golf (off) and Road(on).
chadwce is offline   Reply With Quote
Unread 10-16-2018, 03:52 PM   #23
Gone Wild
 
Sergio's Avatar
Club Car
 
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 6,991
Default Re: field shorting

There have been quite a few threads on this subject over the years, do it and use it at your own risk.

Keep in mind that full throttle does not mean You are not in a torque situation and since Your motor will not be able to develop hardly any torque with the field bypassed, the motor will overheat in torque demand.

If you wait until You are on maximum level road speed, then the field weakening will definitely increase your speed, just disable it before you start going uphill or slow down and accelerate again.
Sergio is online now   Reply With Quote
Unread 10-16-2018, 03:56 PM   #24
Not Yet Wild
 
Join Date: Apr 2011
Location: Goodyear, AZ
Posts: 15
Default Re: field shorting

About torque. Certainly no reduction in torque and there may be slight increase in mid range.
chadwce is offline   Reply With Quote
Unread 10-16-2018, 04:13 PM   #25
Gone Wild
 
Sergio's Avatar
Club Car
 
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 6,991
Default Re: field shorting

You are placing the Motor in a very inefficient mode and stressing the Armature Commutation, there is a reason why Torque motors exists and real field Weakening is calculated per motor specs and done with some resistance, not a piece of wire across the field.
Sergio is online now   Reply With Quote
Unread 10-16-2018, 04:18 PM   #26
.......BGW........
 
rib33024's Avatar
 
Join Date: Apr 2009
Location: FT Lauderdale FL.
Posts: 15,114
Default Re: field shorting

Quote:
Originally Posted by chadwce View Post
About torque. Certainly no reduction in torque and there may be slight increase in mid range.
Yes there is a lot of threads about this here. Why don't you tell every body the bad things that can happen when trying this. There are members that have burned up their motors and some have caught on fire with this mod. because you can't do this at low speed It does get you some more speed. But it is not stable to do
rib33024 is offline   Reply With Quote
Unread 10-16-2018, 04:23 PM   #27
You're a daisy if you do
 
NCPW's Avatar
Club Car
 
Join Date: Sep 2015
Location: North Carolina
Posts: 2,439
Default Re: field shorting

NCPW is online now   Reply With Quote
Unread 10-16-2018, 05:07 PM   #28
Not Yet Wild
 
Join Date: Apr 2011
Location: Goodyear, AZ
Posts: 15
Default Re: field shorting

Do you have links to these threads? Motor current is still limited by controller so as I see it motor is protected. Could these other people have by passed the controller and field windings? We are talking about a stock 1994, 36V controller and motor not some soaped up dragster.
chadwce is offline   Reply With Quote
Unread 10-16-2018, 05:28 PM   #29
Gone Wild
 
Sergio's Avatar
Club Car
 
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 6,991
Default Re: field shorting

Quote:
Originally Posted by chadwce View Post
Do you have links to these threads? Motor current is still limited by controller so as I see it motor is protected. Could these other people have by passed the controller and field windings? We are talking about a stock 1994, 36V controller and motor not some soaped up dragster.
On a series motor that maximum Controller current is also flowing though the Field coil which creates the Flux needed for the Motor to produce torque.

If You remove the Flux by weakening the Field, the Motor will overheat as most of the current flowing through the Armature will be converted into heat and not mechanical force.

I posted a diagram a while back using a push button that would manually engage a relay that would auto-reset when you removed your foot from the pedal.

The idea is that the operator would know when the cart was in cruise mode (not just the pedal down) and would push the "overdrive button" to weaken the field, but as soon as you removed the foot from the pedal the circuit would disarm and prevent You from forgetting the system ON and try to take OFF from stand still.

Anyone that understands Series motor knows how to do field weakening, heck it has been around since the 1800s when the first electric locomotives were put in use, but unfortunately not all members understand the damage it can do to the motor if improperly setup up and used.
Sergio is online now   Reply With Quote
Unread 10-16-2018, 06:01 PM   #30
Not Yet Wild
 
Join Date: Apr 2011
Location: Goodyear, AZ
Posts: 15
Default Re: field shorting

I have rental carets out for three years with no problems. I think you under estimate the residual magnetism in the field to produce flux. When the field is shorted there is no change in motor torque. After more than half speed the residual is more than enough excitation.
chadwce is offline   Reply With Quote
Reply
Go Back   Buggies Gone Wild Golf Cart Forum > Modified Golf Carts > Extreme DC!


Thread Tools
Display Modes


Similar Threads
Thread Forum
Wiring for lights shorting and melting Gas Club Car
97 Club car wont go after shorting A1 with B- Electric Club Car
Micro switch shorting out Electric EZGO
Micro switch shorting out Test Post


All times are GMT -5. The time now is 02:49 PM.


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

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.