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Old 05-18-2017, 10:39 AM   #21
yurtle
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Default Re: Motor recommendations

Quote:
Originally Posted by JohnnieB View Post
If I was planning to run a cart motor much above 8k, I'd have it high-speed banded and critically balanced as well as installing hybrid bearings on motor shaft and differential input shaft since it is not fun sliding to a stop from ~35 MPH with deep ditches and barbed wire fences on both sides of a narrow road.
I hit 35+ mph on one hill every time I cruise the hoods. My drum brakes can lock up both tires at that speed, and I've done so quite a few times, to scare passengers.

I haven't done the math, but have stock tires. The difference was I was expecting it. If it were to occur unexpectedly, while one hand was on the wheel and the other was on an adult beverage, the outcome would have been different.

One day, I plan on bigger tires, which will reduce RPMs. Been throwing all my spare change at AI and autonomous car chip makers' stocks for now.
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Old 05-18-2017, 10:54 AM   #22
JohnnieB
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Default Re: Motor recommendations

35MPH = 8131RPM on 18" tires.

Your motor is rated at 5330RPM, so ~8k is probably in the ballpark.
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Old 05-18-2017, 11:02 AM   #23
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Default Re: Motor recommendations

That's where they measured the max Hp.

BTW, your goggles are starting to look like the VR goggles being sold. You were ahead of your time.
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Old 05-19-2017, 01:13 PM   #24
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Default Re: Motor recommendations

Spoke to The following
PQ however I don't really have any direct options as I don't have a core for a Bandit and I'm underpowered for a Executioner

D&D stated the ES 76 51 was a engineering sample motor and there's no field maps to for that motor with an alltrax so they recommended a 505-0001 motor

EMP gave me a list of 4 options from 1 being a slightly upgraded stock, to a upgraded D&D 505-001 to a super upgraded motor with beefier internals ZQS48-3.8-Tb-LR

Not sure which route to go, any input? Did I miss any company?. I'm getting an Alltrax XCT and also a speed sensor so I can limit rpms what do you guys think?
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Old 05-19-2017, 01:59 PM   #25
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Default Re: Motor recommendations

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Originally Posted by Conradconrad View Post
Spoke to The following
PQ however I don't really have any direct options as I don't have a core for a Bandit and I'm underpowered for a Executioner

1. D&D stated the ES 76 51 was a engineering sample motor and there's no field maps to for that motor with an alltrax so they recommended a 505-0001 motor

EMP gave me a list of 4 options from 1 being a slightly upgraded stock, to a upgraded D&D 505-001 to a super upgraded motor with beefier internals ZQS48-3.8-Tb-LR

Not sure which route to go, any input?

2. Did I miss any company?.

3. I'm getting an Alltrax XCT and also a speed sensor so I can limit rpms what do you guys think?


1. D&D is more than a little gun shy about some of the Alltrax field maps out there for their ES-76-51.
They recommend not weakening the field below 3A with a ES-76-51 and absolutely don't want to go below 2A and some of the Alltrax field maps (like the one I'm using) can drop it down to 1A. (Maybe lower, but 1.0A is the lowest I've ever seen while logging data from my XCT controller.)

Motor heat is the issue, and they get really hot when the field is weaken too much.

2. Admiral. Give Scotty a yell. He sells them.

3. Hopefully you still have the original speed sensor plug. You'll need it to plug into the XCT-PDS controller.
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Old 05-19-2017, 01:59 PM   #26
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Default Re: Motor recommendations

I would go with EMP in a heartbeat on this one. Ask them what they can do with a new Admiral D2 or ?
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Old 05-19-2017, 02:17 PM   #27
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Default Re: Motor recommendations

So these are the options from EMP

OPTION 1 - upgraded stock motor - DE2-4007-LR
This is an upgrade to the stock PDS motor. We would modify the magnetic
systems and would optimize the field winding to take full advantage of the
Alltrax control's field circuit. We would also install high performance low
loss brushes, install new bearing, and pre-lubricate the input shaft.
This option is the least costly and would be suitable for lighter duty
applications. Top speed would be expected to be 25-28 MPH. (I would not
recommend tuning for higher speed as the amp levels would begin to stress
this motor.)

----------------------------------------------------

OPTION 2 - UPGRADED GE AFTERMARKET MOTOR - 5BC48JB1061A-LR
This option begins with a GE motor originally produced for higher top
speeds. The armature bar count is different and the armature conductors are
larger as compared to option 1. The brushes are the same cross section as
with option 1, but the brush mechanism comes standard as the heavy duty type
and the brush mechanism is the reaction type which is less prone to stuck
brush issues.
As a result of these features, this option will be tougher thermally than
the option 1 design. The performance can also be made "stiffer" as well.
(This just means that higher speed can be maintained even when load is
increased or slight grades are met.) This motor can meet your speed target.

$75 more than option 1


-----------------------------------------------------

OPTION 3 - upgraded D&D motor - 170-505-0001A-LR
This option uses a motor made be D&D with some differences which make this
motor tougher than option 1. First, the brush cross section is 25% larger
than in option 1 or option 2. The brush mechanism is also standard as the
heavy duty type. Finally, this motor has a slightly longer stack which can
be helpful for acceleration, etc.

Same price as option 2 aka also $75 more than option 1
-----------------------------------------------------

OPTION 4 - upgraded beefier motor - ZQS48-3.8-Tb-LR
This option has an alternate armature construction with larger conductors.
The brush system is the same larger brush system as found in option 3. The
stack length in this option is larger than any of the others. As a result
of these features, this design would be the most robust thermally. (This
just means it could handle highest loading with least chance of overheat.)

An additional $150 more than option 1


So knowing my application, 18inch tires street legal cart-100% on road with the alltrax xct 500 with 42v and 2 gauge wiring

Im thinking option 4 is too beefie? Lol

Options 2 and 3 look good, anyone have any things to consider when looking at those two? Chuck did a phenomenal job writing this up btw.
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Old 05-19-2017, 02:23 PM   #28
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Default Re: Motor recommendations

I think option 3 will put you where you want to be.
20" tires wouldn't hurt this rig either.
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Old 05-19-2017, 02:31 PM   #29
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Default Re: Motor recommendations

Quote:
Originally Posted by scottyb View Post
I think option 3 will put you where you want to be.
20" tires wouldn't hurt this rig either.
Thanks for advice.

Other question is there 20 inch tire options for 10 inch rims?

My home has a original carport that was built out into a large garage however the ceiling was never raised. Therefore I dont have clearance to have a lifted cart on 22/23 inch tires. But if I can find some tires for the current wheels then in the future I could go that route.
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Old 05-19-2017, 03:46 PM   #30
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Default Re: Motor recommendations

Hundreds of em - google is your friend
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