[JRP3]

Originally Posted by jackbauer

I'd be very concerned at buying a motor thats only tested to what.......1/4 of its rating? my 2 cents.

That's pretty much what we do with all those forklift motors

[Kelmark]

Originally Posted by Bowser330

Thank you for the graph CroDriver.

The graph might be even more accurate if you didnt limit the amps to 597A from 0-5000rpm...

Instead you should maybe graph what it looks like in phases...
Example:***
0-1000rpm = 1400A = 563Nm
1000-3000 = 1000A = 395Nm
3000-5000 = 597A = 233Nm
etc.
etc.
This will not increase peak power but it will increase area under the curve and show more horsepower at lower rpms since:
Horsepower(hp) = Torque (ftlbs) * RPM/5252

***Note: Torque figures pulled from: http://www.evsource.com/tls_warp9.php

The HV controllers I have seen for the Warp11 HV start at 1000 amps. Does that mean that you would need 1000A at 280V? Or would it be less becouse the voltage is increased? Or what about 336V still 1000 amps?

For example wouldn't the Warp 11 at 144V 2000Amps be equal to the 11HV at 288V 1000 amps. Just trying to figure out how someone would build a battery pack large enough to handle such large amp draws at that high voltage.

[major]

Originally Posted by Kelmark

For example wouldn't the Warp 11 at 144V 2000Amps be equal to the 11HV at 288V 1000 amps?

Hi Kel,

Obviously the power from the battery at 144V, 2000A is equal to 288V, 1000A. And if directly connected to the same motor loaded to draw the respective current, then, approximately, that motor at 144V, 2000A would run half speed at twice torque compared to 288V, 1000A. But motor power would be the same, approximately.

But, I believe that the Warp11 is a different motor design than the 11HV. To my knowledge, the performance specs have not been published for the 11HV. Then the above scenario of speed and torque will likely not apply.

Just trying to figure out how someone would build a battery pack large enough to handle such large amp draws at that high voltage.

It's called money

Regards,

major

[Kelmark]

Originally Posted by major

Hi Kel,

Obviously the power from the battery at 144V, 2000A is equal to 288V, 1000A. And if directly connected to the same motor loaded to draw the respective current, then, approximately, that motor at 144V, 2000A would run half speed at twice torque compared to 288V, 1000A. But motor power would be the same, approximately.

But, I believe that the Warp11 is a different motor design than the 11HV. To my knowledge, the performance specs have not been published for the 11HV. Then the above scenario of speed and torque will likely not apply.



It's called money

Regards,

major

After reading myself a little smarter I saw that when running at higher voltages the max draw from the batteries is less than 1000A, closer to 750A. Also I took a drive down to Walton, KS. (EV Blue) And took a ride in a El Camino with the Warp 11 HV with Netgains new 1400A controller it was quite the experience! It put the stock 350 to shame... and while I watched the battery amps it went to 850A for about 1 second. Wayne said he was taking it easy on it but it was still impressive!

[Bowser330]

Originally Posted by Kelmark

After reading myself a little smarter I saw that when running at higher voltages the max draw from the batteries is less than 1000A, closer to 750A. Also I took a drive down to Walton, KS. (EV Blue) And took a ride in a El Camino with the Warp 11 HV with Netgains new 1400A controller it was quite the experience! It put the stock 350 to shame... and while I watched the battery amps it went to 850A for about 1 second. Wayne said he was taking it easy on it but it was still impressive!

Please do tell us more about this EV with Warp11HV and warp-core controller...

specifically about the battery amps at higher rpms/speeds.

Thanks

[Kelmark]

Originally Posted by Bowser330

Please do tell us more about this EV with Warp11HV and warp-core controller...

specifically about the battery amps at higher rpms/speeds.

Thanks

I took a short ride in the El Camino, Wayne drove, I tried to watch the display. The cars speedo was broken and there was not a Tachometer. The highest Amp draw I saw come from the batteries was around 800A in third gear. Not sure on the rpm but he was not pushing it so I would guess the rpm never went above 4,000 but I can't say for sure.

He said when he first got it going he had the local police shutdown a section of road and clock him with their radar, he was clocked at 120mph. I am not sure on the 0-60 time but he assured me that it is faster than the stock Chevy 350 he removed.

The display had two amp readings one was the draw from batteries the other was the amps the motor is receiving. I am still kind of new to EV's so this confused me at first but I guess because the motor rpm is controlled by voltage at lower rpm your motor will get more amps than you draw from your high voltage pack. The display had many other readouts but I did not have time to get familiar with it.

The car had 288 nominal volts of AGM lead batteries around 120AH I believe. So the car had to weigh at least 3,000lbs. I still accelerated very smooth and there was no whine from the motor or controller. I was impressed by the set up.

[Kelmark]

I thought I would add that the 9,000 rpm that some websites post for the Warp 11 HV is not entirely true. 9,000 rpm is the physical limit of the motor before it flies apart. Netgain recommends 5,000 rpm as the max cont. and anything over that for limited time only. I would start your redline at 5,000 and peak and 7,000 rpm to be safe.

[Bowser330]

Thank you for the write up.

I am particulalry interested in the amps (torque) being drawn at higher rpms...

e.g. if he was pulling 800A @ 4000rpm and if 800A = 250ftlbs, then thats 190hp @ 4000rpm

[Kelmark]

Originally Posted by Bowser330

Thank you for the write up.

I am particulalry interested in the amps (torque) being drawn at higher rpms...

e.g. if he was pulling 800A @ 4000rpm and if 800A = 250ftlbs, then thats 190hp @ 4000rpm

I will be taking another trip to see him next month when he has his speedometer fixed and I will try to figure out how to pull up the motor tach and amps on the same page of the display so I can watch them at the same time. Then I will post the results.

[Bowser330]

Originally Posted by Kelmark

I will be taking another trip to see him next month when he has his speedometer fixed and I will try to figure out how to pull up the motor tach and amps on the same page of the display so I can watch them at the same time. Then I will post the results.

That would be great, thanks!