03-05-2016, 11:14 AM
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#381 (permalink)
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PaulH
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
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e*clipse had said the speed was a part of the max torque per amp adjustment and he was absolutely right. I had to modify the test for saliency from
commanding constant current from 0RPM to "RUN OUT OF VOLTAGE" and record the time, seeing what <Id,Iq> (where Id^2 + Iq^2 = currentCommand^2) results in the best time.
The new test is to chop up 0 voltage to "RUN OUT OF VOLTAGE" into several rpm intervals. (0, voltage1), (voltage1, voltage2), (voltage2, voltage3), ... and then, for each of those intervals, see what <Id,Iq> (where Id^2 + Iq^2 = currentCommand^2) results in the best acceleration. So, you would get an array of Id's. Then, we make a curve, and depending on the RPM (or depending on the voltage. same thing) AND depending on the current command, you choose <Id,Iq>.
By the way, field weakening bumped up the top RPM by a factor of 1.222 at 120vDC bus. I was doing a lot of experiments, and didn't want to use as high a voltage.
-Paul
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03-05-2016, 01:12 PM
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#382 (permalink)
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Master EcoModder
Join Date: May 2008
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Question about the MGR: what is the dimension between the output couplings? I hope it is a foot or less ...
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03-05-2016, 02:46 PM
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#383 (permalink)
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Master EcoModder
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Permalink #277
Quote:
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Originally Posted by e*clipse
Length: (from rear - output - bolt surface to front bolt center) 405mm
Length from output flange center to rear bolt surface: 100mm
Width: measured from output flange > output flange 272mm
Approxomite dimensions, because of it's lumpy organic shape:
Overall height: 290mm
Overall length: 420mm
Overall width: 325mm
Weight: 40.9kg; 90.2lbs (dry)
rated output torque ( of motor ) 130N-m
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IOW about 11". 
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03-06-2016, 01:00 AM
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#384 (permalink)
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PaulH
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
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I got it up to 2270 RPM at 120vDC bus. That's getting closer to the oak ridge numbers. I'll try again tomorrow morning before church.
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03-23-2016, 04:56 PM
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#385 (permalink)
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Master EcoModder
Join Date: Sep 2009
Location: Ireland
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Made some progress with the GS450H gearbox. Using the DIR pin from Paul's resolver board has made a big difference. OF course then I receive some PCBs in the post today from Paul with a new resolver board and the DIR pin is broken out 
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Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
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03-28-2016, 10:35 AM
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#386 (permalink)
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Master EcoModder
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Location: Ireland
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Had more results with the GS450h motor. Running on 320V and lots of RPMs. Now I just need an oil pump ....
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Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
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The Following 2 Users Say Thank You to jackbauer For This Useful Post:
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03-28-2016, 09:27 PM
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#387 (permalink)
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Permanent Apprentice
Join Date: Jul 2010
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First, congratulations on your progress with this project!
The motor you're working with is part of the transmission for the GX450h, correct? Isn't there a pump built in? Something like a very svelt gerotor pump?
- E*clipse
Quote:
Originally Posted by jackbauer
Had more results with the GS450h motor. Running on 320V and lots of RPMs. Now I just need an oil pump ....
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03-31-2016, 04:44 PM
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#388 (permalink)
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Master EcoModder
Join Date: Sep 2009
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it's from a GS450h. I made up a crude adapter plate from a piece of 1/2" aluminium and tapped three 1/4" bsp holes over the ports. This will allow me to use an external pump and run some more experiments.Best guess is left is the pressure port , right is return and bottom is a dipstick port. More to follow ...
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Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
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04-05-2016, 04:39 PM
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#389 (permalink)
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Master EcoModder
Join Date: Sep 2009
Location: Ireland
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https://youtu.be/9RXtNTp1AFw
Running with oil pressure from the internal pump. Next plan : external 12v pump. Just need to find one....
__________________
Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
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04-10-2016, 11:20 AM
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#390 (permalink)
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Somewhat crazed
Join Date: Sep 2013
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power steering pump from like a volvo or VW out of a wrecking yard?
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casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
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