BIG BLOCK alternative Motor

Discussions related to motors other than hub motors.
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maitilupas   100 W

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Re: BIG BLOCK alternative Motor

Post by maitilupas » Jun 19 2018 12:16pm

wait, try what Adam recommended me this morning , hall sensors capable of higher gauss point , i think he means that can be capable of high vdc , he suggested like 466
i will try and see i think this makes sense

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eee291   100 kW

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Re: BIG BLOCK alternative Motor

Post by eee291 » Jun 19 2018 12:20pm

Sorry, but I'm not replacing the sensors again.

Update: Ran the Motor with the Sunwin Controller with awesome results. The bearing is toast though, so I'll have to replace it but otherwise it runs fine.

Good enough for me

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trazor   100 W

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Re: BIG BLOCK alternative Motor

Post by trazor » Sep 19 2018 7:30pm

I don't know if this is news but looks like something similar to the original BHT is back in stock: https://www.e-bike-diffusion.com/index. ... _num%253D2

Altair   1 kW

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Re: BIG BLOCK alternative Motor

Post by Altair » Sep 20 2018 7:14pm

Yep!
But I'm not sure that this small shaft of 10mm will be able to withstand the pull of the chain with 3000W... :(

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skeetab5780   10 MW

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Re: BIG BLOCK alternative Motor

Post by skeetab5780 » Sep 20 2018 8:25pm

Altair wrote:
Sep 20 2018 7:14pm
Yep!
But I'm not sure that this small shaft of 10mm will be able to withstand the pull of the chain with 3000W... :(
Odd the original BHT motor had a 18mm shaft at its fat point, i cut off the smaller portion that held the stock 8t sprocket
Image
Last edited by skeetab5780 on Sep 22 2018 9:28am, edited 2 times in total.

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trazor   100 W

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Re: BIG BLOCK alternative Motor

Post by trazor » Sep 20 2018 8:47pm

Altair wrote:
Sep 20 2018 7:14pm
Yep!
But I'm not sure that this small shaft of 10mm will be able to withstand the pull of the chain with 3000W... :(
I never had this or the original BHT motor in my hands. I really don't know if it can withstand the torque. What I've here and is holding well is a LightningRod's Big Block and the output shaft (not the internal) is 12mm and can withstand a lot of abuse. Never had a problem.

I hope somebody purchase this motor and do a review. I've just purchased a Denzel D4500 and I bet it is probably the best big block alternative at the moment.

Altair   1 kW

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Re: BIG BLOCK alternative Motor

Post by Altair » Sep 20 2018 9:21pm

It's not the torque that is going to be a problem, but rather the bending force of a chain pull of many hundreds of pounds, acting about 1 inch from the bearing.
The shaft material will fatigue and eventually will break off right at the bearing.

maitilupas   100 W

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Re: BIG BLOCK alternative Motor

Post by maitilupas » Sep 22 2018 2:45am

i broke 1x 520 sprocket and 3x #219 kart sprockets in these 15mm shafts, shafts still intact!

(front sprockets)

Altair   1 kW

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Re: BIG BLOCK alternative Motor

Post by Altair » Sep 22 2018 9:11am

A 15mm shaft is about 3.3 times stronger than a 10mm shaft.
A18mm shaft is 5.7 times stronger than the 10mm one.

Altair   1 kW

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Re: BIG BLOCK alternative Motor

Post by Altair » Sep 22 2018 9:13am

This "new" BHT motor looks like it was made to be matched to a gearbox, with this small 10mm shaft.

maitilupas   100 W

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Re: BIG BLOCK alternative Motor

Post by maitilupas » Sep 22 2018 1:34pm

good for me! thanks for sharing will maybe be interesting if it has low weight to a mtb frame or so



maitilupas   100 W

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Re: BIG BLOCK alternative Motor

Post by maitilupas » Apr 07 2019 9:36am

Think its ok but i see its an old design the price is also not that cheap it might need bearings after a few kms and the windings if pushed too hard can burn a bit but is not bad i think.
I had a motor like this before just talking my experience

maitilupas   100 W

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Re: BIG BLOCK alternative Motor

Post by maitilupas » Apr 07 2019 9:37am

I like that it has those mounts

maitilupas   100 W

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Re: BIG BLOCK alternative Motor

Post by maitilupas » Apr 07 2019 9:44am

By the way with time i had found out that motors always needs a bit of play i see many ppl just welding and bolting these motors directly to the frames and that is nasty you need to give allow the motor to have some movment , silent blocks , rubbers even inner tubes can help or a steel Mount enough big has space to alow the motor to move .
Just my toughts

fourbanger   100 W

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Re: BIG BLOCK alternative Motor

Post by fourbanger » Jun 27 2019 9:47am


maitilupas   100 W

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Re: BIG BLOCK alternative Motor

Post by maitilupas » Jun 27 2019 9:54am

gets about the same including the shipping , some vendors do this cut the price summ in shipping :()

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Overclocker   10 kW

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Re: BIG BLOCK alternative Motor

Post by Overclocker » Jul 08 2019 11:21am

so i just got a Kelly KLS7230S to feed more power into my BHT (36kv). seems to run OK at low RPMs. at higher RPMs it runs very rough

runs very smoothly w/ a cheap square-wave controller

maitilupas   100 W

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Re: BIG BLOCK alternative Motor

Post by maitilupas » Jul 08 2019 12:09pm

if i was you i will try the Nucular , problems solved, FOC, Square, Sine, allot of features, not buggy

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Overclocker   10 kW

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Re: BIG BLOCK alternative Motor

Post by Overclocker » Jul 08 2019 10:50pm

kellybht.jpg
this is strange because skeetab was able to successfully use the BHT w/ the KLS. but i also noticed that his BHT has a different alu case...

anyway i also tried to use my KLS w/ GNG mid motor, runs rough as well:



apparently this KLS only likes hub motors, works flawlessly w/ my QS 205:
IMG_20190707_141924.jpg

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neptronix   100 GW

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Re: BIG BLOCK alternative Motor

Post by neptronix » Jul 09 2019 12:13am

Sounds like your Kelly has a low commutation frequency and cannot drive the eRPM you are looking for.
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maitilupas   100 W

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Re: BIG BLOCK alternative Motor

Post by maitilupas » Jul 09 2019 12:41am

no , skeetab had allot of shuttering with the kls and bht , it runned but rough he end up buying the kbs version.
the kbs are what you need , but if i was you ill go to a nucular

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Overclocker   10 kW

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Re: BIG BLOCK alternative Motor

Post by Overclocker » Jul 09 2019 1:36am

maitilupas wrote:
Jul 09 2019 12:41am
no , skeetab had allot of shuttering with the kls and bht , it runned but rough he end up buying the kbs version.
the kbs are what you need , but if i was you ill go to a nucular

skeetab had issues w/ KLS and a lightningrods motor. his KLS+BHT ran ok until he decided that the BHT was too small for his heavy moto conversion

ok i'll check out the nucular... but i'm also planning to get a denzel D7500 (which is known to work well w/ KLS controller) so i still might have a use for this controller

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Overclocker   10 kW

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Re: BIG BLOCK alternative Motor

Post by Overclocker » Jul 09 2019 10:59am

Please only use KBS with our engines. it has been tested multiples times with sin wave like KLS or adapto, never with good results due to non ideal hall sensor signal. the Denzel engine is compatible with KLS because it uses external hall, probably with cleaner halls signals, but it adds bulk and weight.

Adam
http://52.25.253.50/forums/viewtopic.ph ... 5#p1367667

wish i had read this earlier :lol:

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