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  #81  
Old 06-11-2012, 05:46 PM
Bowser330 Bowser330 is offline
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Default Re: Scott Drive 100kW AC motor & controller

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?
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  #82  
Old 06-14-2012, 05:36 PM
DavidDymaxion DavidDymaxion is offline
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Default Re: Scott Drive 100kW AC motor & controller

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.
Quote:
Originally Posted by ruckus View Post
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'. ~<:|
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Last edited by DavidDymaxion; 06-15-2012 at 01:01 AM.
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  #83  
Old 06-15-2012, 12:38 PM
somanywelps somanywelps is offline
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Default Re: Scott Drive 100kW AC motor & controller

How many KW is the beefier system?
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  #84  
Old 06-15-2012, 01:16 PM
DavidDymaxion DavidDymaxion is offline
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Default Re: Scott Drive 100kW AC motor & controller

From the graph:

500 Nm * 2100 rpm * 2 * pi / 60 s = 110 kW
Quote:
Originally Posted by somanywelps View Post
How many KW is the beefier system?
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  #85  
Old 06-15-2012, 03:49 PM
somanywelps somanywelps is offline
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Default Re: Scott Drive 100kW AC motor & controller

The current controller states 150kw peak.

I assume the beefier version is more than that.
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  #86  
Old 06-21-2012, 07:05 PM
ruckus ruckus is offline
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Default Re: Scott Drive 100kW AC motor & controller

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
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Last edited by ruckus; 06-21-2012 at 07:09 PM.
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  #87  
Old 06-21-2012, 10:56 PM
ruckus ruckus is offline
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Default Re: Scott Drive 100kW AC motor & controller

Quote:
Originally Posted by DavidDymaxion View Post
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.
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Last edited by ruckus; 10-03-2012 at 08:24 PM.
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  #88  
Old 06-21-2012, 11:13 PM
DavidDymaxion DavidDymaxion is offline
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Default Re: Scott Drive 100kW AC motor & controller

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
Quote:
Originally Posted by ruckus View Post
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
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  #89  
Old 06-21-2012, 11:57 PM
somanywelps somanywelps is offline
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Default Re: Scott Drive 100kW AC motor & controller

Quote:
Originally Posted by ruckus View Post
Motor output would be roughly 80% of controller kw (at best).
? Even Brushed DC motors are high 80%'s on efficiency.
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  #90  
Old 06-22-2012, 12:45 AM
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Default Re: Scott Drive 100kW AC motor & controller

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.
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