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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV.



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Old 03-31-2017, 01:28 PM   #1
TomClevenger
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Default Ezgo pds question

Can I bypass my controler its junk and the 3rd one iv bought
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Old 03-31-2017, 01:40 PM   #2
mutant
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Default Re: Ezgo pds question

wow:sh ock:-u need to know WHY you are killing them.....and when jonnieB is taking his TIME to help u i SUGGEST you follow his instructions so you can find the problem efficiently....

my guess they make a CONTROLLER so you can control the cart....but i am just a silly guyngkratard:
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Old 03-31-2017, 02:13 PM   #3
cgtech
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Default Re: Ezgo pds question

Yes, if you want your cart to be insanely unsafe in 2 ways. First, it will have only 2 speeds, zero & max. Second, all that current dumping through the solenoid every time the gas is pressed from a stand still will soon weld the solenoid On, now you have only 1 speed, max speed into the first stationary object you find. Don't bother with the brakes, they won't help you, key switch won't either. It's a horrible idea & pretty much guaranteed trip to the hospital.
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Old 03-31-2017, 03:55 PM   #4
scottyb
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Default Re: Ezgo pds question

Yes you can. Make sure the cart is in forward & you are on the Bonneville salt-flats. Kiss the driver goodbye & make the final connection from the rear of the cart.

TGIF
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Old 03-31-2017, 03:57 PM   #5
scottyb
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Default Re: Ezgo pds question

Seriously Tom - Tell us about the controllers you are buying and post some pics of the cart if it is not the one in your avatar
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Old 03-31-2017, 06:44 PM   #6
TomClevenger
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Default Re: Ezgo pds question

I have bought 2 of the Curtis stick and the altrax ncx I only got about 6 months out of the ncx and it took a crap but I didn't mess with it for a while so my warranty is up. The cart in the avatar is the one also but I have put smaller tire on it once I bought the ncx
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Old 04-01-2017, 10:23 AM   #7
JohnnieB
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Default Re: Ezgo pds question

Is it possible to run a SepEx (Separately Excited) motor from the battery pack? Yes.
Is it practical to run a SepEx (Separately Excited) motor from the battery pack? No.

Setting aside the safety and fire hazards mentioned by others, without a means to alter the field excitation (Amp flow through the field windings) during operation, you while either have high torque & little speed or little torque & high speed and a short motor lifespan due to being locked into those speed/torque curves.

SepEx controllers use a process known as field mapping to adjust the motor's Speed/Torque curve for more torque per amp flowing through the armature, or for more motor RPM per volts applied to armature as the need changes during operation. When field mapping on the fly is eliminated, any and all advantages of a SepEx motor is lost.

The taller than stock tires are the reason you are burning out stock controllers and Alltrax recommends NCX controllers not be used on lifted carts (which typically have taller than stock tires). See attached text excerpt from the NCX mini-manual, which is also attached in PDF form.

If you want to run tires that are much taller than stock (18") in on a PDS cart, install an Alltrax XCT controller. It uses motor RPM as well as armature amps to determine field weakening (field mapping) and better compensates for the motor spinning slower due to the taller tires.

For example, the motor of a cart going 10 MPH on 18" tall tires spins at 2323 RPM while with 22" tires, it spins at 1900 RPM. That ~400 difference in RPM makes a huge difference on motor amps.

I don't have a Speed/Torque curve for a stock motor, but the cart had the sane motor I'm running was doing 10 MPH on 18" tall tires, if I floored the pedal it would draw ~200A and it it was doing 10 MPH on 22" tall tires, it would try to draw ~450A. Since the amount of heat generated increases exponentially to the increase of amps (W = IČ x R), the 250A increase is a 62,500W increase per Ohm of resistance it is passing through. In a nutshell, the controller, motor and high current cables run hotter with taller tires.

The bottom line is that the drive train and amp delivery system have to comparable with the tire height.
Attached Images
File Type: jpg NPX vs lifted carts.jpg (60.5 KB, 0 views)
Attached Files
File Type: pdf Doc100-015-C_OP-NCX-Mini-Man(1).pdf (197.4 KB, 0 views)
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