which motor for more torque - 600 or 750 watt

[myzter]

I want to upgrade my motor.. the XYD Currie 3 hole mounting type, however the 900watt is not being produced and is always on back order (05/30 atleast)
my current motor:
24 volt, 350 watt, 2600 RPM, 22 Amp

so my choices are:

XYD-6B 24Volt, 750watt, 2600R/MIN, 28 Amp
http://www.partsforscooters.com/120-58_motor_Currie?sc=2&category=77293
$89.00

XYD-13A 36 Volt, 600 Watt, 2600 RPM, 36.0 Amp
http://www.tncscooters.com/product.php?sku=106142
$88.00

All 3 motors are of the same size dimensions.
I want to upgrade for the most torque.
My battery pack is 24V and controller are rated 24V @ 350 - 750 Watts
The highest watt motor 750 is only rated for 6 Amps more than my 350 watt..

 

[Kepler]

None of those numbers really add up. Your existing motor is 24V and 22A max. Thats 528W for a start.

The XYD-6B can do 672W and the XYD-13A can do 1296W according to the specs.

What can your controller actually do? How many amps the controller can throw at the motor is going to decide how much torque you can have.

If put a higher rated motor with the same voltage and current limited controller, I doubt you will notice any difference at all.

I would measure Watts with you current setup. A 350W setup means you have a 15A max output. Presuming you want to stay with 24V, perhaps look at upgrading the controller to a unit with a 30A current limit. Motor will probably handle it OK. Worst case, you need to replace the motor after a while but typically these motors are quite robust.

 

[neptronix]

Those two motors may actually be the same thing but with a different winding.

The motors currie uses tend to be like that. You'll see the same thing for 24v/35a and a 36v/20a motor or whatever.

I am no brushed motor expert, but coming from the experience with my eZip motor, brushed motors don't handle extra power the same as brushless. I would not buy either of these with the expectation of running much more power through then than what they were designed for. For example, the eZip motor will die at 36v if ran at that voltage for very long. Meanwhile people often run 2x-3x the voltage brushless motors are designed for with no problem.

If i had to buy one, i would get the high amp 600w though and add more voltage, but not a hell of a lot more. Many of those brushed motors get hot during stock operation, so the amount of power you can add is a bit limited.

Someone correct me if i am wrong - again, my experience with brushed is limited to eZip and various power tools i've used & abused.

BTW, what are you trying to upgrade? an eZip?

 

[myzter]

Iam currently running a 350watt 24V motor @ 24V 8s1p (8x 16Ah A123 prismatics) with a 4s1p (4x A123 M1) booster pack on a 2pst switch wired in after the controller output.
My watt meter shows I hit over 1140 watts when accelerating.. I have been riding just over 30km total in this setup with no problems.
The boost is usually only on for 2-10 seconds...

I have read around the web that people kill these motors very easily, but they are pushing 2x the rated voltage.
It would be either to get the 36V 600 watt motor and run it at 24V through the controller and have a 4 cell LIPO booster or
750 watt @ 24V and 4 cell LIPO booster ??

 

[flyinmonkie]

I had the 24v 600w version and it ran great at 36v of lead and 22.2v of lipo. I saw awesome torque with the lipo and had plenty of power to do 33kph with the gearing I had. the motor would get warm to the touch, but not burning hot. When I went to 44.4v of lipo, I cooked it in 8 minutes.

I got a 36v 1000w version from superkids online. He had to dig one out from the warehouse and thought he had some left, but I am not sure. It is handling 44.4v (50v off the charger) of lipo fine and only gets warm to the touch. It is pathetic at 22.2v though.

If you want to stick with 24v, then go with the 24v 750w version. I'm not sure what the torque will be like though. If you want to up the volts for more torque, then go with the 36v version. As Kepler said, your controller will make a big difference.

I have a controller with a 100amp limit and I see bursts of 117amps and I have seen over 5000w out of both of the above setups. I saw over 6000w when I fried the 600w 24v motor. I regularly saw 2000w out of the 24v 600w motor with 22.2v of lipo and it was a bit twitchy. You had to be easy on the throttle.

Clay

 

[myzter]

Another idea I have heard is take the 1000watt motor & Gear Box Assembly from Superkids and replace the case cover with the cover from my 350 watt motor
they both use 4 screws attach.
1000 Watt Brush Motor & Gear Box Assembly
http://www.thesuperkids.com/10wabrmowdid.html