[Bowser330]

400Nm = 295ftlbs from 0 to 2100rpm (118hp)
300Nm = 221ftlbs up to 3000rpm (126hp)
200Nm = 147ftlbs up to 4000rpm (112hp)

Seems like a good motor to mate to a transmission, as much power as the smaller European TDI engines with more low end torque not to mention torque form zero rpm; getting up to speed would be easier than waiting for a turbo to spool up.

The higher voltage version should push out the peak power rpm, right?

[DavidDymaxion]

I was on the Kelly Controllers web site, and happened to see they have a BLDC system for sale. Note the graph looks very similar to the one below:

http://kellycontroller.com/mot/downl...ance_Curve.pdf

http://kellycontroller.com/144v-12kw...or-p-1072.html

http://kellycontroller.com/khb144012...gen-p-832.html

Here's a quick comparison:

Kelly ..... Scott

75 lbs ..... 176 lbs
80 nM ..... 500 Nm
$3100 ..... $6000?
3200 rpm ... 3200 rpm knee in curve

Anyway, note the same rpm for the knee. The Scott motor is about 2.3x the weight, but says it has 6x the torque and power. Keep in mind the Kelly system is much lower voltage and possibly lower current, so that could make for differences.

Originally Posted by ruckus

Hello,
Ok, since Greenstage is out of the game (as far as I am concerned), I might as well post the torque chart of the motor. Now please realize this is unconfirmed. It is also using the Chinese controller. If Scott will make a high voltage (540+vdc) version then the figures may be more, so this is just a rough image.



Might as well put the 320vdc version up as well: (I think it got a bit distorted going through powerpoint. )



Anyway, take them with a serious grain of salt. When the first shipment arrives in the U.S. I will initiate dyno tests to confirm.

Cheers

p.s. "norminal power" is a very specialized Chinese term combining 'nominal' and 'normal'. ~<:|

[somanywelps]

How many KW is the beefier system?

[DavidDymaxion]

From the graph:

500 Nm * 2100 rpm * 2 * pi / 60 s = 110 kW

Originally Posted by somanywelps

How many KW is the beefier system?

[somanywelps]

The current controller states 150kw peak.

I assume the beefier version is more than that.

[ruckus]

Here is a link to a short piece on National New Zealand news about Hagen's direct-drive Toyota powered by a windmill. That driveway does seem to prove that the motor produces ample low-end torque. Hagen has the controller limit set to 365 amps out of 590 amps potential. So he is only using about 60% of the available torque. He says petrol vehicles have a very difficult time getting started up the drive if they stop. They either stall out or rev up and spin the tires. The electric drive allows him very good traction control.

http://www.3news.co.nz/Kiwi-car-powe...2/Default.aspx

Cheers

[ruckus]

Originally Posted by DavidDymaxion

From the graph:

500 Nm * 2100 rpm * 2 * pi / 60 s = 110 kW

The max kw shown in the charts are produced using a 150kva controller. That is why the motor output maxes out at 110kw. (110 is 80% of 150)

Motor output would be roughly 80% of controller kw (at best).

Actually, Scott said Semikron has 1200v capacitors. That would certainly open the door on 'high' voltage.

[DavidDymaxion]

Thanks for the video link, that's neat.

• It looks like the motor is in front to me, but it was kind of hard to see -- maybe he is actually using the tranny gearing?
• He is the 3rd person I know of who has used "tow regen"
• A falling torque curve does provide a form of traction control -- as the wheels spin faster it loses torque

Originally Posted by ruckus

Here is a link to a short piece on National New Zealand news about Hagen's direct-drive Toyota powered by a windmill. That driveway does seem to prove that the motor produces ample low-end torque. Hagen has the controller limit set to 365 amps out of 590 amps potential. So he is only using about 60% of the available torque. He says petrol vehicles have a very difficult time getting started up the drive if they stop. They either stall out or rev up and spin the tires. The electric drive allows him very good traction control.

http://www.3news.co.nz/Kiwi-car-powe...2/Default.aspx

Cheers

[somanywelps]

Originally Posted by ruckus

Motor output would be roughly 80% of controller kw (at best).

? Even Brushed DC motors are high 80%'s on efficiency.

[Jan]

I guess, the mentioned Amps are actually Arms. That's why kVA is used as power unit, instead of kW. And 150kVA, where the A is Arms, is roughly 105-110 real kWatts.
The efficiency would also be nice to know.