Zy1020 motor question

[Samj]

Is it normal that i can stop my wheels turning using only my hands with this motor or something is wrong?? The only thing not new is the batteries.

I have the zy1020 motor rated 2800rpm 48v 26.6a and controller yk33f lb57 rated 30a both from ebay alpha wheels...

 

[itsid]

if you're terribly geared.. sure!
we need more details to be able to answer your question

'sid

 

[Samj]

10 on the motor shaft and 72 sprocket..18.5 rear tire..

 

[itsid]

very likely normal yes...

the motor you got is still unknown..
since I cannot find the auction you were talking about, I have no reference to go by.

the ONLY 26.6(well 26.7)Amp zy1020 I am aware of is a 36V 750W motor.

since you say it's a 48V motor...
that 26 Amps must be assumed as the peak amps for now (< 10 sec)
soo we can assume a constant rating of maybe 15-16 Amps or so
which would put your motor in the 700-800W of ELECTRICAL power total...
further assuming 85% efficiency it's 650W of mechanical power

So yeah maybe 2Nm of torque
scaled by a factor of 7.2:1 makes it 14.4 Nm of Torque at the rear axle

with your 18" wheel (a lever of 9" or 0.23m) you can stop that with
only applying a force of about 3 Newtons (~30kg or about 60 lbs)

No big deal.. if your kart/bike is on the floor you can certainly stop it from moving forward just by holding it.
(assuming you weigh more than 60lbs and can lift your own weight )

'sid

PS all the above are assumptions based on the little info we have... but it should give you an idea

 

[Functional Artist]

very likely normal yes...

the motor you got is still unknown..
since I cannot find the auction you were talking about, I have no reference to go by.

the ONLY 26.6(well 26.7)Amp zy1020 I am aware of is a 36V 750W motor.

since you say it's a 48V motor...
that 26 Amps must be assumed as the peak amps for now (< 10 sec)
soo we can assume a constant rating of maybe 15-16 Amps or so
which would put your motor in the 700-800W of ELECTRICAL power total...
further assuming 85% efficiency it's 650W of mechanical power

So yeah maybe 2Nm of torque
scaled by a factor of 7.2:1 makes it 14.4 Nm of Torque at the rear axle

with your 18" wheel (a lever of 9" or 0.23m) you can stop that with
only applying a force of about 3 Newtons (~30kg or about 60 lbs)

No big deal.. if your kart/bike is on the floor you can certainly stop it from moving forward just by holding it.
(assuming you weigh more than 60lbs and can lift your own weight )

'sid

PS all the above are assumptions based on the little info we have... but it should give you an idea

Good info!

I now, have (2) of the ZY1020 motors mounted on the !Arriba! kart
...but, the (2) together don't see to be as powerful as the (1) MY1020 that I had on it last fall

The specs "on the labels" of the (2) motors (MY1020 & ZY1020) are pretty close, both say
...Voltage 48V
...Out put 1,000W
...Rated Current 26.7A

The only "listed" difference, on the label, is the Rated Speed
...the My1020 says 3,000 RPM
while
...the ZY1020 says, 2,800 RPM

Could you list what the specs "should be" for an "actual" 48V 1,000W motor?
...mechanical power
...torque
...& torque at the rear axle (@ 6:1, 7.2:1, & 8:1)

* Maybe, I'll break out the e-Lemon-aid kart & do some testin', for comparison purposes like acceleration, top speed, max amp draw, avg. amp draw

 

[Quinc]

Good info!

I now, have (2) of the ZY1020 motors mounted on the !Arriba! kart
...but, the (2) together don't see to be as powerful as the (1) MY1020 that I had on it last fall

The specs "on the labels" of the (2) motors (MY1020 & ZY1020) are pretty close, both say
...Voltage 48V
...Out put 1,000W
...Rated Current 26.7A

The only "listed" difference, on the label, is the Rated Speed
...the My1020 says 3,000 RPM
while
...the ZY1020 says, 2,800 RPM

Could you list what the specs "should be" for an "actual" 48V 1,000W motor?
...mechanical power
...torque
...& torque at the rear axle (@ 6:1, 7.2:1, & 8:1)

* Maybe, I'll break out the e-Lemon-aid kart & do some testin', for comparison purposes like acceleration, top speed, max amp draw, avg. amp draw

Problem is the lb57 controller is for a 350w-500w motor. You need to feed your motors some power. Get a kelly KDS48200E or if you want to keep cost down and also have great power get the chinese YK43B 24-60v controller.

Kelly controllers.
http://kellycontroller.com/mini-dc-controller-kds12v-72v-c-27.html?osCsid=arvp5ntl6bvmcd46mrlh1qe235



Same motors you are running, but they are not being limited to only 30 amps:
https://www.youtube.com/watch?v=P9b6UdxyRHM

 

[itsid]

while a good controller is certainly needed..
this cannot be the causing issue..

the controller is rated for 30A means that it usually has at least 2 MosFets,
which will in fact be able to supply just over 40Amps for short periods of time. (then they cook off)

there is no halfworking with controllers.. either they allow for the currents drawn or not..
(the motor draws as much as it needs, and if that's more than the controller would be able to supply, the controller will cease to work entirely ..)
So it's amp limit isn't reached yet.

Since to my best knowledge that controller has no limiter switch (PWM limit at 50 or 75 or 100%)
that too is not really a cause for the low torque.

What is is the low motor torque to start with and the low overall torque due to the gearing (well wheelsize IS part of the gearing although mostly not regarded as such)

Anyways.. a better controller is mostly well worth it's money.. (likely runs cooler, more reliable and certainly has more than just one benefit in terms of adjustability and features)
BUT it's not the cause of the issue above...
if it were, the controller would've burned out already
(since that's how they let you know about their lack of current throughput )

More likely: the battery isn't able to deliver the currents needed... but less than 30 amps... I doubt you run into troubles even if you power the motor with C-Cells (dumb idea.. don't!)

'sid