AeroElectric-List Digest Archive

Fri 06/12/15


Total Messages Posted: 5



Today's Message Index:
----------------------
 
     1. 07:01 AM - Re: Data acquisition tools? (Robert L. Nuckolls, III)
     2. 09:15 AM - Re: Re: Newbie with PM alternator feed question (Robert L. Nuckolls, III)
     3. 03:00 PM - Re: Data acquisition tools? (Paul A. Fisher)
     4. 04:34 PM - Re: For Sale: Two Cheltons, EI MVP-50, Pinpoint ADAHRS and Spare (Norm.dewitt)
     5. 09:23 PM - Re: Re: Newbie with PM alternator feed question (Robert L. Nuckolls, III)
 
 
 


Message 1


  • INDEX
  • Back to Main INDEX
  • NEXT
  • Skip to NEXT Message
  • LIST
  • Reply to LIST Regarding this Message
  • SENDER
  • Reply to SENDER Regarding this Message
    Time: 07:01:46 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Data acquisition tools?
    At 04:25 PM 6/11/2015, you wrote: >Thanks Bob. I would be interested if you find your amplifier board >description. This looks cheap enough to buy just to play with it to >see what it can do! You got that right. In fact, even if I can't find the original (I think it had a d-sub input and ribbon cable output to my $100 fast-das) I think I'll whip out another version with a hole pattern that will accept that $15 eBay product. If your guys are willing to put up the hardware with wings, I'll put up the electron-pushers. This is possibly the beginnings of a nice article for KP. I've done a lot of this kind of thing . . . on other people's million dollar airplanes. Given that I don't have ready access to OBAM aircraft, it's a rarer opportunity to exploit the trickle-down possibilities. Bob . . .


    Message 2


  • INDEX
  • Back to Main INDEX
  • PREVIOUS
  • Skip to PREVIOUS Message
  • NEXT
  • Skip to NEXT Message
  • LIST
  • Reply to LIST Regarding this Message
  • SENDER
  • Reply to SENDER Regarding this Message
    Time: 09:15:15 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Newbie with PM alternator feed question
    At 05:26 PM 6/11/2015, you wrote: > >Thanks Bob...more confused and curious now. > >The system is described as a permanent magnet 3-phase alternator >with a simple and reliable shunt type of regulator with fail safe >characteristics. They further state "the thyristors in the shunt >regulator actually short the generator windings to ground (dump the >load) in a pulsating like fashion..." > >What class of of R/R and Alternator do I have? Or, better yet, what >is the accurate way to refer to my system. That 'series' and 'shunt' thing is subject to interpretation and mis-understanding borne of arcane technologies and low information consumerism . . . Indeed, the first r/r systems installed on small alternators were "shunt" regulated in the sense that when the system votlage was high enough, an silicon controlled rectifier was triggered to place a nearly dead short on the alternator's output. Simple, effective and VERY inefficient. This system placed the alternator under a 100%, worse than full load. The alternator had to be designed to tolerate the 'abuse' by making sure that it was adequately cooled . . . okay for running the headlight on a mini-bike. As the power output of the PM alternator went up to accommodate increased system demands, the dead-short-shunt technique became impractical but the term 'shunt' style regulator sorta hung on although it could NOT be configured to operate like it's ancestors . . . >Not sure what a series switched R/R is with respect to my >system. Should I consider changing out my R/R for any reason? No >Trying to determine how to best (if required) implement a disconnect >of some sort in the event an over voltage condition occurs. That drawing I referenced illustrates a methodology for disconnecting the AC power from the R/R with a relay controlled by the crew for normal on/off control of the alternator . . . a relay that could also be opened by operation of a crowbar over votlage detection module. In the case of a 3-phase alternator, you need to open TWO of the three leads . . . the single phase can be shut down by opening ONE of the two leads. >Trying to sort things out as I proceed and appreciate this forum and >your literature! Pleased that you find it useful. I need to take care of some other pressing business. I'll see if I can sketch a diagram of what I've described above and post it later today. Bob . . .


    Message 3


  • INDEX
  • Back to Main INDEX
  • PREVIOUS
  • Skip to PREVIOUS Message
  • NEXT
  • Skip to NEXT Message
  • LIST
  • Reply to LIST Regarding this Message
  • SENDER
  • Reply to SENDER Regarding this Message
    Time: 03:00:43 PM PST US
    From: "Paul A. Fisher" <paulf@hughes.net>
    Subject: Re: Data acquisition tools?
    I'm sure we can find "hardware with wings"! I've been chasing hot oil temperatures lately, so I have a vested interest in this - which is why I volunteered to investigate tools for our chapter. If we could make a KP article out of it that would help others, that would be even better! Let me know how (if) you would like to proceed. - Paul On 6/12/2015 6:59 AM, Robert L. Nuckolls, III wrote: > At 04:25 PM 6/11/2015, you wrote: >> Thanks Bob. I would be interested if you find your amplifier board >> description. This looks cheap enough to buy just to play with it to >> see what it can do! > > You got that right. In fact, even if I can't > find the original (I think it had a d-sub > input and ribbon cable output to my $100 > fast-das) I think I'll whip out another version > with a hole pattern that will accept that $15 > eBay product. > > If your guys are willing to put up the hardware > with wings, I'll put up the electron-pushers. > This is possibly the beginnings of a nice > article for KP. > > I've done a lot of this kind of thing . . . on > other people's million dollar airplanes. Given > that I don't have ready access to OBAM aircraft, > it's a rarer opportunity to exploit the trickle-down > possibilities. > > Bob . . . > > * > > > *


    Message 4


  • INDEX
  • Back to Main INDEX
  • PREVIOUS
  • Skip to PREVIOUS Message
  • NEXT
  • Skip to NEXT Message
  • LIST
  • Reply to LIST Regarding this Message
  • SENDER
  • Reply to SENDER Regarding this Message
    Time: 04:34:24 PM PST US
    Subject: Re: For Sale: Two Cheltons, EI MVP-50, Pinpoint ADAHRS
    and Spare
    From: "Norm.dewitt" <norm.dewitt@gmail.com>
    Hi Mike, Is the PinPoint ADAHRS still for sale? What are you asking for it and will you sell it separate from the Chelton IDUs? Thanks, Norm Norm.dewitt@gmail.com Read this topic online here: http://forums.matronics.com/viewtopic.php?p=443442#443442


    Message 5


  • INDEX
  • Back to Main INDEX
  • PREVIOUS
  • Skip to PREVIOUS Message
  • NEXT
  • Skip to NEXT Message
  • LIST
  • Reply to LIST Regarding this Message
  • SENDER
  • Reply to SENDER Regarding this Message
    Time: 09:23:02 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Newbie with PM alternator feed question
    > >>Trying to sort things out as I proceed and appreciate this forum >>and your literature! > > Pleased that you find it useful. I need to take > care of some other pressing business. I'll see if I > can sketch a diagram of what I've described above > and post it later today. I've posted a drawing that describes on/off control of a 3-phase PM alternator with Over Voltage Protection http://tinyurl.com/n9tottf Bob . . .




    Other Matronics Email List Services

  • Post A New Message
  •   aeroelectric-list@matronics.com
  • UN/SUBSCRIBE
  •   http://www.matronics.com/subscription
  • List FAQ
  •   http://www.matronics.com/FAQ/AeroElectric-List.htm
  • Web Forum Interface To Lists
  •   http://forums.matronics.com
  • Matronics List Wiki
  •   http://wiki.matronics.com
  • 7-Day List Browse
  •   http://www.matronics.com/browse/aeroelectric-list
  • Browse AeroElectric-List Digests
  •   http://www.matronics.com/digest/aeroelectric-list
  • Browse Other Lists
  •   http://www.matronics.com/browse
  • Live Online Chat!
  •   http://www.matronics.com/chat
  • Archive Downloading
  •   http://www.matronics.com/archives
  • Photo Share
  •   http://www.matronics.com/photoshare
  • Other Email Lists
  •   http://www.matronics.com/emaillists
  • Contributions
  •   http://www.matronics.com/contribution

    These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.

    -- Please support this service by making your Contribution today! --