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  1. PhoenixOSU

    lead angle hardware solution??

    I've been working on how to create lead angle delay with hardware on an ASIC, like how it seems to have been done on the Toshiba TB6586FG (the datasheet has a block diagram but doesn't show how they did it). Does anyone here have an idea how they accomplished a phase delay in the hall signals...
  2. PhoenixOSU

    What motor to use?

    Try the MARS motor, that is probably more what you want. Here is a link to a place to get one http://www.kellycontroller.com/motors-c-21_63.html I don't know if you want brushed DC or brushless DC (very different), but both are sold there, get one of the MARS, they have lots of power and at...
  3. PhoenixOSU

    12 kw rc motor

    15KW is enough to take a 1 person vehicle up to highway speeds. From my calculations, a vehicle like the 97 Toyota Camry I drive needs 20-25KW (about 25HP) to reach 75MPH based on areo and rolling resistances, weight, etc. I want 2 of these!!!!
  4. PhoenixOSU

    Volts Times Amps = WHAT?

    For any black box element in a system: W_out = W_in * Efficiency Then use the law of substitution and the definition of a watt: W = A * V Volts in and volts out maybe different, amps in and amps out may be different, but watts must obey the above law. The rest is elementary algebra and I would...
  5. PhoenixOSU

    12 kw rc motor

    How will it compare to this motor by Hacker? http://www.aero-model.com/Hacker-Brushless-A200-8.aspx Will it be a bit lower in price?
  6. PhoenixOSU

    Blown GM controller, need to identify transistor

    There are PNP 1.5A 25V BJTs. They are out of stock on digikey, but here is a similar BJT. http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=568-5068-1-ND It is a bit larger and may result in a stronger driver, I suggest if you replace it for one phase, you do so for all of them...
  7. PhoenixOSU

    12 kw rc motor

    How well do you guys think these things will parallel? With each having its own controller, or a custom controller of some kind, I can see these being used even in larger vehicle applications (I have ideas and after my new job starts I may want a few of these).
  8. PhoenixOSU

    large brushless motor for car sized EVs?

    I've been looking at motors for doing car conversions and all I can really find is brushed DC motors and separately excited DC motors, but no BLDC in the 25-50 hp range. Does anyone know of one such motor? I guess an alternative is to use 8 of those large 12kw RC motors with some kind of crazy...
  9. PhoenixOSU

    Fechter's Capacitor Coupled Cell Balancer

    Here is a simulation of the concept, it seems to work well according to LTSpice
  10. PhoenixOSU

    controller current thresholds

    I am curious to know what you guys (especially the engineers here) think of over current thresholds in a controller, how many and which currents matter? There is of course motor current and battery current which can be measured. The Kelly seems to use two thresholds, but are they for battery or...
  11. PhoenixOSU

    Appropriate Methods of Transportation

    People shouldn't smoke in schools, cheat on thier wives, provide for underage drinking, drive way past the speed limit, etc, but they do. People will do what they want regardless of what they should. There is only 1 motivating force for a person, what they want, this can be gotten at gun point...
  12. PhoenixOSU

    Appropriate Methods of Transportation

    That does sound like a good idea, using social networking tools to help and a grass roots approach is not a bad idea, though grass roots movements need a TON of work to really get moving (for example the "grass roots" tea party movement which had the whole of FOX "news" behind it to get it...
  13. PhoenixOSU

    Appropriate Methods of Transportation

    The issue of transitioning away from ICE vehicles is kind of like the search for the cure for the common cold, a lot of very very smart people have tried and still, but the fact is that the common cold is not one illness but a large number of them with similar symptoms. This is a very complex...
  14. PhoenixOSU

    SOLUTION FOR MORE MOTOR-AMPS

    umm.... does that measurement show different currents on the same wire? That's not right from a technical standpoint, see the law of conservation of mass specifically applied to electronics and the law of conservation of current, current at each end of a wire MUST be the same or else there is...
  15. PhoenixOSU

    Appropriate Methods of Transportation

    Ok, a flexible vehicle would also require a TON of engineering work and probably be very expensive. Cars are successful as the dominant form of transportation here because they work very well and they are perceived as cheap, easy, and efficient (even though they aren't). But most of all cars...
  16. PhoenixOSU

    Watt has Jack been saying???

    I'm probably going to get flamed for this, but the guy in the video sounds like an ol self entitled "thinks-he-knows-it-all"...
  17. PhoenixOSU

    Interesting sinewave motor controller for PMBLDC

    I would be very very wary of any Toshiba chips. I used one in a design for a sensorless BLDC a few months ago (working as a design engineer) and had a hell of a time getting it to actually work, there is next to no decent documentation, and there is absolutely zero help from Toshiba. The data...
  18. PhoenixOSU

    kelly KEB config program version 3.1 not working

    I am trying to get the Kelly software to work on my PC for the KEB controller and it will not install, I get an error message in windows xp an windows 7. The KBL software works fine. Is anyone else having this issue? Does someone have a working copy of the install file for perhaps version 3.0?
  19. PhoenixOSU

    trouble with relays

    That makes sense, sometimes the relays would pop open eventually but sometimes not. I hope these are still ok, but I may replace them as soon as I get some more. I think a "primer" switch inside the glove compartment next to where the key is that acts as both an interlock for the key and uses a...
  20. PhoenixOSU

    trouble with relays

    I am working with some relays to connect / disconnect my 72V SLA battery pack from my Kelly controller, I put 3 of them in parallel in series with the positive line off the pack. When I connect everything up the relays are off and there is no power to the controller, when I apply 12V to the...
  21. PhoenixOSU

    Help identifying battery, controller, & charger manufacturer

    I would guess either infineon or crystalyte controller from the case.
  22. PhoenixOSU

    I want to buy groceries

    I'm not so sure an e-bike is as big a target for theft as a normal bike. A thief is more likely not to know what an e-bike is, and therefore not know if or for how much he/she could sell it and to whom it would sell, whereas a nice road bike is a bit more obvious. I've never had mine stolen, and...
  23. PhoenixOSU

    MOSFET Rds rating

    I've been looking at some TO-247 FETs lately, and I really like my IRFP MOSFETs, but IXYS has some nice ones as well these days. But the difference is that the RDS_ON is rated at 500mA, whereas the IRF FETs advertise their RDS_ON at 90A. By how much does RDS_ON change over the range of ID? I...
  24. PhoenixOSU

    What is the range of battery votlage EV people use?

    I'm curious, what range of voltage do most EV builders an enthusiasts use? I think 24 is about the lowest thing I've seen before "too gutless to be useful" becomes a reality barring parallel motors. But what of the high end? I was thinking probably most people don't go over 100V? 150V? 200V?
  25. PhoenixOSU

    Does anyone know where to get a 2000 to 3000w hub motor?

    What about the carrying capacity of these hub motors? while an e-bike may be typically rider + 100lb or less of bike, a moped/motorcycle can weight considerably more due to the larger frame, instrumentation, and battery. I am confident the Kelly motors can handle any of the "xtreme" type of...
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