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  #21  
Old 06-01-2012, 05:10 PM
ruckus ruckus is offline
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Default Re: Scott Drive 100kW AC motor & controller

No timeline yet. Hopefully this summer I can start some testing. Are you more interested in the product as listed? or a "turned up" hotrod version?
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  #22  
Old 06-03-2012, 05:20 PM
Bowser330 Bowser330 is offline
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Default Re: Scott Drive 100kW AC motor & controller

100kw would be great for 6K$..

you could charge a bit more for a higher voltage (higher power) inverter version...
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  #23  
Old 06-04-2012, 08:50 AM
Nuts&Volts Nuts&Volts is offline
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Default Re: Scott Drive 100kW AC motor & controller

Just heard back from Philip at Greenstage about the Scott Controller. The controller is good for 150kW in a 30lb package which is pretty good when you consider that it comes with a contactor and precharge circuit internally. It can handle up to 450Vdc and 450Adc on the input and programmable on the AC output (not sure of the limits here). I was told that the price for a single controller will be $2945 which in my opinion is pretty amazing, because that is a lot less than a comparable Sevcon Size 8 or Tritium Wavesculptor 200 which are both over $6000, and can't do much more than 100kW peak. They both offer FOC control thou and work with Induction machines.

The controller at the moment uses trapezoidal control for BLDC motors and FOC/Sinusoidal control is in development and will be prioritized based on demand. Even if this software adds a bit of cost the controller is still ahead on cost based on all of the research I have done. I was also told that the full user manual will be completed shortly.

More Info here http://www.greenstage.co.nz/PDFs/Scott_Drive_100.pdf

Hopefully this information helps out!
Kyle
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  #24  
Old 06-04-2012, 11:51 AM
somanywelps somanywelps is offline
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Default Re: Scott Drive 100kW AC motor & controller

Quote:
Originally Posted by Nuts&Volts View Post
Just heard back from Philip at Greenstage about the Scott Controller. The controller is good for 150kW in a 30lb package which is pretty good when you consider that it comes with a contactor and precharge circuit internally. It can handle up to 450Vdc and 450Adc on the input and programmable on the AC output (not sure of the limits here). I was told that the price for a single controller will be $2945 which in my opinion is pretty amazing, because that is a lot less than a comparable Sevcon Size 8 or Tritium Wavesculptor 200 which are both over $6000, and can't do much more than 100kW peak. They both offer FOC control thou and work with Induction machines.

The controller at the moment uses trapezoidal control for BLDC motors and FOC/Sinusoidal control is in development and will be prioritized based on demand. Even if this software adds a bit of cost the controller is still ahead on cost based on all of the research I have done. I was also told that the full user manual will be completed shortly.

More Info here http://www.greenstage.co.nz/PDFs/Scott_Drive_100.pdf

Hopefully this information helps out!
Kyle
Did they happen to mention the controller RPM limit?
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  #25  
Old 06-04-2012, 12:10 PM
Nuts&Volts Nuts&Volts is offline
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Default Re: Scott Drive 100kW AC motor & controller

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Originally Posted by somanywelps View Post
Did they happen to mention the controller RPM limit?
No, but it appears that the maximum switching frequency is 15kHz. I believe if you use this and the pole pair count of the motor you can determine the maximum RPM possible by the controller. I think is is RPM=(freq*60)/(# of pole pairs)

I can ask him explicitly if you would like or we can just until the manual is released.
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  #26  
Old 06-04-2012, 03:33 PM
steven4601 steven4601 is offline
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Default Re: Scott Drive 100kW AC motor & controller

Switching frequency is not directly linked to maximum rpm speed the controller allows to produce for a certain motor. Switching speed usually factors higher than the produced fundamental frequencies output current.

See the manufacturers spec for the rpm limit on the controller.
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  #27  
Old 06-04-2012, 04:17 PM
ruckus ruckus is offline
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Default Re: Scott Drive 100kW AC motor & controller

Here is an article about the first customer of the Scott Drive in New Zealand:
http://www.odt.co.nz/news/dunedin/21...ic-powered-car
Not much technical info in a typical news article, but it powers a Rav4 which is not a light or aerodynamic vehicle. Several thousand km and counting...
I will be contacting the owner for feedback.

Also, here is the next frame size up of the same motor used in the Scott Drive. It powers buses, which requires a lot of torque.



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Last edited by ruckus; 10-03-2012 at 08:02 PM.
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  #28  
Old 06-04-2012, 04:52 PM
ruckus ruckus is offline
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Default Re: Scott Drive 100kW AC motor & controller

Just got off the phone with Hagen Bruggemann of NZ who is using the Scott Drive. Turns out he ditched the transmission and is using it DIRECT DRIVE!! Nobody would consider this motor strong enough to do direct drive. Some even claim it should have weak torque. Obviously the skeptics are wrong.

He says no problem driving the RAV4 up steep mountains with full passengers and hang-gliders on the rack. USING DIRECT DRIVE??!

He can't really calculate efficiency on the flat because they cross a VERY steep pass every day and still average 250w/mile in a rav4.

He did mention that American brushed motors are a "joke" and "at least 10 years behind the rest of the world with pathetic efficiency".

Interesting and brilliant chap. He will be sending me some photos and more data. Stay tuned..
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Last edited by ruckus; 10-03-2012 at 08:03 PM.
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  #29  
Old 06-04-2012, 04:58 PM
njloof njloof is offline
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Quote:
Originally Posted by ruckus View Post
Interesting and brilliant chap. He will be sending me some photos and more data. Stay tuned..
Keep us posted. I haven't gotten an email from them for a week
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  #30  
Old 06-04-2012, 05:14 PM
somanywelps somanywelps is offline
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Default Re: Scott Drive 100kW AC motor & controller

Quote:
Originally Posted by Nuts&Volts View Post
No, but it appears that the maximum switching frequency is 15kHz. I believe if you use this and the pole pair count of the motor you can determine the maximum RPM possible by the controller. I think is is RPM=(freq*60)/(# of pole pairs)

I can ask him explicitly if you would like or we can just until the manual is released.
Do ask if you don't mind.

It heavily affects gearing choices.

I'd also prefer AC induction, less chance of demagnetizing the permanent magnets.

Also we'd need sinusoidal. Trapezoidal probably won't cut it.

Quote:
Originally Posted by ruckus View Post
any interest?
Obviously :P

Then again I'm not going to be the first adopter. If it works, it works.

Last edited by somanywelps; 06-04-2012 at 05:23 PM.
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