Need a low-comsumption tractor. Don't want speed

P

philgib

10 µW
Joined
Oct 20, 2008
Messages
5
Hola chicos,

Which electric kit conversion, below 400 dollars excluding batteries, would transform my Schwinn-alike bike into a tractor, i.e. immediate power at starting from zero, sometimes driver + 1 passenger, but no need for speed at all (10mph more than enough for 1 single driver) as I would favor a longer range AND safety 8)

I would use car batteries. i don't care about the extra weight.

PS : I am a mechanical moron, and it is always hard to find spares in Mexico, so the simpler the better. :roll:

Thx a lot

Phil
 
Crystalite 408, either front or rear hub ( your option ) and a 36V pedalec controller ( avoid immediate start, if the hall sensors go, you are screwed ).

Or get even simpler and do a DC brushed Clyte ( controller optional, you can fake it with a large knife switch ... be sure to hold on ). DC brushed is the cheap way to get a reliable immediate start.

Put three truck batteries in series in a bike trailer, and run wires to the controller. Use an auto recharger to recharge the batts one at a time.

Quick, cheap, dirty, indestructible.
 
kbarret,

Thank you, this is maybe what I am looking for.

( controller optional, you can fake it with a large knife switch ... be sure to hold on )
Click to expand...
Would you please explain further ? I told you I was a mechanical moron :)

And does it make more noise than a brushless ?

Thanks a lot

Philippe
 
kbarrett said:
Use an auto recharger to recharge the batts one at a time.Quick, cheap, dirty, indestructible.
Click to expand...
Or wire `em so ya can switch `em from series to parallel to charge all 3 at once?
tks
loK
 
Brushed motors are more noisy than brushless. But brushed motors only take 2 wires to run, and can be run directly from the battery without a controller. brushless need the controller, or they won't turn at all.

The best "Tractor" motor for a gearless Hub motor would be a Crystalyte 5305.

A geared chain drive would have even more power
 
philgib said:
Would you please explain further ? I told you I was a mechanical moron :)

And does it make more noise than a brushless ?

Thanks a lot

Philippe
Click to expand...

A bit more noise, yes. A controller on a brushed motor allows you to gradually add power with a thumb or a twist throttle. Replacing it with a simple knife switch means you have two speeds: Off and full steam ahead.

Wiring the batteries to 36V means connecting all three in a string, POS to NEG. Hook the controller up to the POS and NEG terminals at the ends of the string of batteries. If you don't use a cotroller, hook the ends directly into the motor, with the knife switch on one line to open or close the circuit. A brushed DC motor is pretty simple, if you wire it wrong it just spins backwards ...

Only real disadvantages are a bit higher power use, and DC brushes will need to be replaced every few years.
 
You can get a wheeled brushed motor, controller, and thumb throttle for about $325 or so here:

http://www.werelectrified.com/SearchResults.asp?Cat=25

There are a bunch of other vendors as well, like Justin at ebikes.ca, etc. ...
 
Do you want to power a front wheel or a back one? If front, the Wilderness energy motors are a good choice. I would recomend the brushless one though. I found the brushed one makes heat, and can cause the thing to go up in smoke if run too hard in hot weather. I live near Juarez, in new mexico and I melted one last summer. The brushless motors run much cooler, and go farther per charge. A very good deal on this type of motor, made by aotema, can be had at hightekbikes.com, and more info on it in the review and testing section. The aotema motors have the advantage of not having hall sensors. One less thing to break. They do make some noise starting up, but they do start themselves, even uphill.

Other very good choices would be ebikes-ca, where you can get chrystalite brushless motors. a 408 or 4011 motor would be a very good choice, and you can get those ones in rear wheel if that is what you need. The higher the number the more efficient they are at lower speeds. So a 4011 might be real good for you.

Geared hubmotors are the best choice for high power at lower speeds, hill climbing, pulling lots of weight. But some are very expensive, all make more noise than direct drive hubmotors, and some will strip the gears if oveloaded with current, above 48v. Ebikes ca's ezee is supposed to be very good, but above the price you wish. One gearmotor, the bafang, may be in your price range. Knuckles on the endless sphere sells them I think.

The 5305 would without a doubt be a very very good choice for maximum power, and speed too with that one. But again, more money than you are wanting to spend. You won't be sorry if you buy a 5305, but it will cost more.

Cheapest good motor kit may be the Aotema. It's what I run, so obviously I like em.

Best technical support is from ebikes-ca

If you go with a brushed motor, and a big switch, use 24 volts. The motor won't fry itself on that voltage, it might at 36v if used without a controller. Also the switch won't weld itself shut as easy. If that happens, you will need to be able to reach a plug connection to shut it off, or you will have to jump for it. Brushed controllers are the cheapest, so using a controller would be a better idea, and much safer.
 
Thank you very much guys.

Hey Dogman, we are neighbours... Where do you live ? Albuquerque ? Las Cruces ? Tell me if you already have snow, I want to bring the kids for a w/e in Ruidoso...

Back to the bike... I don't like noise... And I don't like the idea of an on/off switch. I would like something smoother, so I guess that I should go for a brushless engine.

I looked at the AOTEMA link you indicated, and the price does not look THAT expensive at 329 USD. I am OK to spend 50 bucks more if it is for quality sake.

The weight of my bike is distributed differently and is quite even on both wheels, so I guess that a front wheel should be ok.

Now you say that the geared one makes more noise. In the forum I have also seen nylon gears kind of melted.
So maybe a brushless with no gears ? Does it sound stupid ? :oops: Would it have less torque ? Is it only for the back wheel ?

Thanks for your patience... :roll:
 
Hey I have a kit you might want, its the ampedbikes front wheel kit in a 26" rim, its a torquey direct drive brushless motor(similar to the clyte 408 but more reliable). Its an immediate start controller but I have the exact same thing on my bike (only a rear motor) and I have had no problems in rain snow and ice. I bought 2 kits thinking I could sell one for a profit, I haven't had time to do that, and now I have lost my job so I need to get rid of things I don't need.(I'm only a college student living with my parents don't feel sorry for me :wink: ) I bought it for 400$ shipped, and I used it for 100 miles before swapping it out for a rear motor. The controller is unused, I can wire it up better for you if you like, they use aweful connectors and I can include some good sla batteries(15$each) with a charger(36v). The are 9ah, you might want to get 6 (I have 9, they are brand new) and wire them in parallel. I can also include a torque arm(really important for front hubs), pretty much everything you would need. 440$ for the kit+torque arm and (6)batteries w/charger + better wiring and a parallel connector for the batteries, or just 350$ for the kit and torque arm. plus shipping, you would have to educate me about shipping to mexico, or maybe it could be shipped to member near the border and you could pick it up, assuming you are interested :oops:
 
Not far off your route to Ruidoso, in Las Cruces. I'll send you a PM with details.

I think most brushless, gearless motors would work fine for you, but too much weight would make hills harder to climb. If you can, stop by my house and test ride some of my bikes, and you will have a better idea what a typical gearless motor can do. Motorising one wheel should work fine. On my trike, when you pedal it, only one back wheel is driving, the other one just freewheels. You'd think it would take off crooked, but it doesn't. If more power was needed, it would be possible to run two hubmotors on one throttle, and two controllers. But for the use you intend, you will have plenty of power I think.
 
For Torque and not speed geared motors are the best. If you want the simplicity of a brushed motor and a cheap controller, the Hiezmann hub motor is the way to go for under $250.
I have a rear 24V version with a thermal sensor. Let me know if you are interested.
BTW these are German made high quality motors.
 
Echoing Dogman, it sounds to me like a rear 5 series Crystalyte motor would be an appropriate pick. The large diameter and coil count will be advantageous for high torque from a stop. A 5305 (higher turn count the better) would be good. Out of everything listed thus far a 5305 will have the best starting torque.
 
the 5305 cost over 400$ by itself. He is trying to get under 400 for a kit.
 
Samhyun hubs seems to be the bidnis...

geared for your pleasure :wink:

their company motto is "Action on the site toward ZERO DEFECT" http://www.samhyun.co.kr/eng/headoffice/

imagine that... no other ebike manufacturer would even dare think of saying this..

http://evbike.blogspot.com/

anyone else have experience with Samhyun?

J
 
I've seen a couple of their bikes around Seoul. Premade jobs. Google Hirun bicycle Korea.

In general in Korea don't confuse poor English with poor business practice. The larger chaebol (LG, Samsung, Lotte etc) have perfect English on their foreign released stuff, but things released for internal consumption it's a totally different story. I visit LG's head office every day for work, and make a game of picking mistakes on their elevator LCD news/info display.

There's also brands of snacks/beverages with names like: Pocari Sweat, Binch, Cream sand and my new favorite, ricetard!

But the products themselves are often excellent. At least over the last ten years or so.

Couldn't offer you any more useful info on Hirun though. I got a good close up look at one of their models in a bike shop. Seemed to be well made for what it was.
 
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