garolittle
Member
I just purchased a similar motor and charge controller from alpha motors. I have not tried everything out yet but their prices are great.
Simple/low-cost Electric go kart conversion
- Thread starter Functional Artist
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I just purchased a similar motor and charge controller from alpha motors. I have not tried everything out yet but their prices are great.
Functional Artist
Well-known member
Tidying up my notes-n-stuff
So, it looks like
...a 24V 500W motor (rated 2,500 RPM's)
...running on ~10" tires (~32" circumference)
...@ a 8:1 ratio (10 tooth drive sprocket & a 80 tooth driven sprocket)
Will draw ~30A to start off & ~15A crusin' & go ~10 mph
MS/GR=ASxTC=IM/FT=FMxHR=FHxMM= MPH
(look ma, I'm doin Algebra)
Motor Speed/Gear Ratio=Axle Speed x Tire Circumference = Inches per Minute traveled/Foot(12) = Feet per Minute traveled x Hour(60) = Feet per Hour traveled x MPH Multiplier(.000189) = Miles Per Hour
In this scenario
2,500/8 = 312.50
312.50x32" = 10,000.00"
10,000.00"/12 = 833.33
833.33x60 = 49,999.80
49,999.80x.000189 = 9.45 MPH
Motor speed is (2,500 rpm's) divided by the gear ratio (8) = axle speed (312.50)
Axle speed (312.50) times the wheel circumference (32") = inches per minute traveled (10,000.00")
Inches per minute traveled (10,000.00") divided by inches in a foot (12") = Feet per minute traveled (833.33)
Feet per minute traveled (833.33) times minutes in an hour (60) = feet per hour traveled (49,999.80)
Feet per hour traveled times miles per hour multiplier (.000189) = 9.45 MPH
So, it looks like
...a 24V 500W motor (rated 2,500 RPM's)
...running on ~10" tires (~32" circumference)
...@ a 8:1 ratio (10 tooth drive sprocket & a 80 tooth driven sprocket)
Will draw ~30A to start off & ~15A crusin' & go ~10 mph
MS/GR=ASxTC=IM/FT=FMxHR=FHxMM= MPH
(look ma, I'm doin Algebra)
Motor Speed/Gear Ratio=Axle Speed x Tire Circumference = Inches per Minute traveled/Foot(12) = Feet per Minute traveled x Hour(60) = Feet per Hour traveled x MPH Multiplier(.000189) = Miles Per Hour
In this scenario
2,500/8 = 312.50
312.50x32" = 10,000.00"
10,000.00"/12 = 833.33
833.33x60 = 49,999.80
49,999.80x.000189 = 9.45 MPH
Motor speed is (2,500 rpm's) divided by the gear ratio (8) = axle speed (312.50)
Axle speed (312.50) times the wheel circumference (32") = inches per minute traveled (10,000.00")
Inches per minute traveled (10,000.00") divided by inches in a foot (12") = Feet per minute traveled (833.33)
Feet per minute traveled (833.33) times minutes in an hour (60) = feet per hour traveled (49,999.80)
Feet per hour traveled times miles per hour multiplier (.000189) = 9.45 MPH
Functional Artist
Well-known member
When we moved up to the 48V 1,000W MY-1020 (brushed) motor
...the meter showed that it drew ~25A to start off & ~8A crusin'
...& the GPS showed that it went ~14 MPH
The label says it's rated @ 3,000 (max) rpm's
...but, the math doesn't seem to work out
MS/GR=ASxTC=IT/FT=FMxHR=FHxMM= MPH
If it's (really) running @ 3,000 (max) rpm's
...that would be
3,000(motor rpm's)/8 = 375 (axle rpm's)
375 (axle rpm's) x 32" (tire circumference) = 12,000 (inches traveled-per min.)
12,000 (inches traveled-per min.)/12 (inches per ft.) = 1,000 (feet traveled-per min.)
1,000 (feet traveled-per min.) x 60 (min. per hour) = 60,000 (feet traveled-per hour)
60,000 (feet traveled-per hour) x .000189 (MPH multiplier) = 11.34 MPH
But, we know (from our testing data) that e-Lemon-aid did 13 - 14 mph (consistently)
So, it seems like (for the math to work out properly)
...that this 1,000W motor
...operating @ 48V
...is actually running @ ~3,750 (max) rpm's
3,750/8 = 468.75
468.75 x 32" = 15,000"
15,000"/12" = 1,250'
1,250' x 60 = 75,000
75,000 x .000189 = 14.8 MPH
Yup! that seems a bit more realistic
...the meter showed that it drew ~25A to start off & ~8A crusin'
...& the GPS showed that it went ~14 MPH
The label says it's rated @ 3,000 (max) rpm's
...but, the math doesn't seem to work out
MS/GR=ASxTC=IT/FT=FMxHR=FHxMM= MPH
If it's (really) running @ 3,000 (max) rpm's
...that would be
3,000(motor rpm's)/8 = 375 (axle rpm's)
375 (axle rpm's) x 32" (tire circumference) = 12,000 (inches traveled-per min.)
12,000 (inches traveled-per min.)/12 (inches per ft.) = 1,000 (feet traveled-per min.)
1,000 (feet traveled-per min.) x 60 (min. per hour) = 60,000 (feet traveled-per hour)
60,000 (feet traveled-per hour) x .000189 (MPH multiplier) = 11.34 MPH
But, we know (from our testing data) that e-Lemon-aid did 13 - 14 mph (consistently)
So, it seems like (for the math to work out properly)
...that this 1,000W motor
...operating @ 48V
...is actually running @ ~3,750 (max) rpm's
3,750/8 = 468.75
468.75 x 32" = 15,000"
15,000"/12" = 1,250'
1,250' x 60 = 75,000
75,000 x .000189 = 14.8 MPH
Yup! that seems a bit more realistic
Functional Artist
Well-known member
Thanks!
I use batteries like these (~$21.00 ea. delivered)
https://www.ebay.com/itm/12-Volt-12...064789?hash=item2110b2a895:g:o~cAAOSwQiFaegEy
At my local battery shops these batteries are ~$35.00 ea.
I usually look online for better deals
I never actually weighed this kart but, I would guess
...the kart is ~75 - 100 lbs.
...& I am ~150 lbs.
So, ~225 - 250 lbs. (roughly)
Functional Artist
Well-known member
Running @ both
...24V (2 - 12V 12AH batteries)
...& 48V (4 - 12V 12AH batteries)
I have gotten at least
...30 minutes of run time
...many, many times
For charging, I use
...@ 24V this 24V 1.6A charger (~$20.00 delivered)
https://www.ebay.com/itm/Cruzin-Coo...-than-stock-/131556451534?hash=item1ea16024ce
...@ 48V this 48V 2.5A charger (~$25.00 delivered)
https://www.ebay.com/itm/48-Volt-2-...152157?hash=item20e7d0765d:g:ALEAAOSw32lY0wuL
* So, run time is ~ 30 min.
...but, recharge time is usually ~2 - 4 hours
** Keep in mind that on a kart
...the batteries are being drained @ 10 - 30A
...but, the chargers are recharging them @ ~1.5 - 2.5A
So do use 2 24v chargers or 1 48v charger ? Sorry not wanting to be a pain in the _ss but I was looking on ebay and I find electric motor 48v 1800 w and prices go from 180.00 to 115.00 is there a huge difference between the the or is there something I should look out for ?
Functional Artist
Well-known member
I have many karts
I use the
...24V charger for my kids 24V karts
https://www.youtube.com/watch?v=YZ6bcBy1O1M
https://www.youtube.com/watch?v=qTRA1FXz9Lw
...48V charger for my 48V !Arriba! kart
https://www.youtube.com/watch?v=jSJWEJJmJ9U
As far as a motor & matching controller
Here is
...a 48V 1,000W brushed motor/controller kit (~$100.00)
https://www.ebay.com/itm/1000-W-48-...roller-keylock-Throttle-charger-/161881812471
or
...a 48V 1,800W brushless kit (~$170.00)
https://www.ebay.com/itm/48V-1800W-...121776&hash=item362b542ab4:g:JOYAAOSwLUpad9VG
Functional Artist
Well-known member
You watched ALL of them?
...that's like over 100 videos
https://www.youtube.com/channel/UCbZcWp0v78Nd49y4h3UD9tg/playlists?disable_polymer=1
Most of my 48V karts weigh in ~250 - 300 lbs. total, with the driver
IDK there are Not many hills here in Toledo
...e-Lemon-aid is running @ 8.4:1 (10 tooth drive sprocket & an 84 tooth driven sprocket)
...!Arriba! is running @ 7.2:1 (10 tooth drive sprocket & a 72 tooth driven sprocket)
IMHO as long as you use a low (8:1) gear ratio it should climb (mild) hills OK
* If you are trying to climb hills you are going to pull some "big" amps (drain your battery's quickly)
** The steeper the hill, the larger the amp draw (draining your batteries quicker)
*** Pulling "big" amps also creates a lot of heat (keep an eye on your motor, controller & wiring/connector temps)
Okay with that being said , where did you find a motor sprocket 10 tooth when I looked the motor come with 11 tooth? As far as weigh limit I'm guessing I should be in that same ball park of 250 to 300 lbs . My rear tires are only 11 inches tall , how big is that 84 tooth sprocket ?
My thoughts are maybe it wouldn't be a bad idea to build a jack shaft set-up just so I can get a better gear ratio and have more ground clearance .
My thoughts are maybe it wouldn't be a bad idea to build a jack shaft set-up just so I can get a better gear ratio and have more ground clearance .
Functional Artist
Well-known member
Okay with that being said , where did you find a motor sprocket 10 tooth when I looked the motor come with 11 tooth?
"Most of these small electric motors come with
...a sprocket for either a #25 chain size
...or the even more oddball #8mm chain size"
"I could not find #35 chain sprockets for these motors anywhere, so I ordered some from China, I call 'em "Power Curve" sprockets
http://www.diygokarts.com/vb/showthread.php?t=38425
"You can (now) get them from Alfa Wheels"
https://www.ebay.com/itm/1000-W-48-...ock-Throttle-charger-/161881812471?rmvSB=true
...they sell them separately
...or they include a "Power Curve" sprocket", with a motor purchase
As far as weigh limit I'm guessing I should be in that same ball park of 250 to 300 lbs . My rear tires are only 11 inches tall , how big is that 84 tooth sprocket ?
"The tires on e-Lemon-aid are ~11" tall too. An 84 tooth sprocket is kinda big but, I haven't had any clearance issues."
My thoughts are maybe it wouldn't be a bad idea to build a jack shaft set-up just so I can get a better gear ratio and have more ground clearance .
"Yup, you can it's just more"
...work
...weight
...moving parts
...& expense
Attachments
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SAM_5014.jpg
I bought a 48v brushed motor and speed controller combo on eBay similar to the one you have linked here. When I read the "About this item" section on the listing it says Unite MY1020, but in the photo and what I received is a clone I believe. Do you have any experience with the clone motors? How do they compare with a real Unite MY1020? The photo on the listing names the motor as a
ZY1020 rated at 3000 rpm with a max current of 20.8amps.
The motor I received has an Alfa Models sticker that says
ZY1020GD and claims 2800rpm with a max current of 26.7 amps.
Should I confront the seller about the difference in motors or do you think it is comparable? I imagine the difference between 2800rpm and 3000rpm can be adjusted with gearing and my motor claims to be able to pull roughly 6amps more than the ZY1020 sticker in the ad, but I usually don't trust Chinese clone ratings much.
Thanks for all the info you guys post here, this is my first post and this forum has given me the confidence to do my own electric kart conversion.
As for the kart it is a Tyrod IV frame that I want to turn into a kiddy kart for my daughter. If it ends up having enough power to give my 220lbs butt a ride that would be a great bonus.
Here is the listing I bought and a photo of the motor I received.
https://m.ebay.com/itm/size-35-Sprocket-1000W-48V-DC-Electric-Motor-w-Base-Control-Box-f-Ebike-Gokart-/162852342765?txnId=1678265127006
Functional Artist
Well-known member
A lot of these "clone" motors are kinda new to the market
we need to test them & post the data
but, I have not heard anything bad about the ZY motors.
I have used a couple of the YT80Y450 (24V 450W) motors
They are very powerful & seem to be pretty ruggedly built
I used one on El Turbo here
http://www.diygokarts.com/vb/showthread.php?t=36894
...even over-volted it to 36V (several times)
https://www.youtube.com/watch?v=H-704ZyJkaU&index=16&list=PLoL6eIYWPO_nHQGd71JlTBCk9cwuQrOaQ
Attachments
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SAM_8072.jpg
bmscott
Cheapskate Newbie
This is good stuff - not incredibly far from what I'm planning, although I'm going to start a separate thread as my focus is on super-low-cost. Still, your motor and battery setup are in the same range as mine and you're getting a lot more speed than I was hoping for, which is good news! And if I could find an old frame like that, I might sidestep most of my anticipated construction problems and just go with it... but the old frames I've seen available so far are all very small.
Great write-up though, thanks!
Great write-up though, thanks!
Jamie Nevin
New member
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Choice of 24v motors
Hello,
Which of the 24v motors gave the longest run time?
Many Thanks,
Jamie
Hello,
Which of the 24v motors gave the longest run time?
Many Thanks,
Jamie
Functional Artist
Well-known member
IMO
There's not really much difference, just different manufacturers.
Kinda like the difference between a GE light bulb (made by General Electric) or a Phillips light bulb (made by the Phillips Corporation)
They both screw into the same type of a socket & put out roughly the same amount of light
The brand name motor (MY1020) usually costs more
The clone motor (ZY-1020) usually costs a little less
There's not really much difference, just different manufacturers.
Kinda like the difference between a GE light bulb (made by General Electric) or a Phillips light bulb (made by the Phillips Corporation)
They both screw into the same type of a socket & put out roughly the same amount of light
The brand name motor (MY1020) usually costs more
The clone motor (ZY-1020) usually costs a little less
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