Making a high efficency 3 Kw DC Generator

Discussion in 'DIY Marinizing' started by kistinie, Mar 8, 2009.

  1. Tug
    Joined: Aug 2007
    Posts: 50
    Likes: 8, Points: 0, Legacy Rep: 122
    Location: Muskoka,Ontario,Canada

    Tug Junior Member

    Over the winter a friend of mine coupled a small 3.5 hp 4 stroke lawn mower engine to a 75 amp car alternator...
    The idea was to have a remote battery charger...
    He said it worked well....
    He also stated that he had to max out the rpm of the engine(3600 rpm) just to get the charging started...
    Once it started charging the rpm could be dropped down to approx. 1200 rpm without any loss in charging amps..
    Cheers
    Tug
     
  2. mgriffin

    mgriffin Previous Member

    I was shocked when I saw that kistine has only 13 rep. points and he joined in 2007....Not to mention how many posts he has made...*I have more rep points than him. I have 23, but I had 19 before my other profile got screwed up.
    (*I am 13 years old)
     
  3. kistinie
    Joined: Aug 2007
    Posts: 493
    Likes: 8, Points: 0, Legacy Rep: -74
    Location: france

    kistinie Hybrid corsair

    kilo de plume et kilo de plomb

    This is the legendary question of the kilo made of lead or plums.
    Here it it the moment of inertia of steal versus aluminium.
    Read the formula and see what it gives.

    rpm is one Exp ² parameter
    Inertia moment obtained by a light large flywheel, such a flywheel can be the electric motor.
    A clutch between EM and ICE, a CPP driven constantly to the electric motor, gives you a light simple group, propulsion and generation, full hybrid. All in one simple. Transmission can be semi flexible as demonstrated by Rick.
    And all this is public domain, free from use.

    Please note that mass is linear
    Diameter is exp ²


    Coming back to motors, your next one could be on hydrogen

    http://www.physorg.com/news98556080.html

    Cheers
     

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  4. mgriffin

    mgriffin Previous Member

    Yes I am sure it will be. (snicker*) You know, kistinie, I don't give a shot about hydrogen, or any of that crap. I am sure you are having the time of your life looking forward to driving a hydrogen bomb car or whatever.
     
  5. mgriffin

    mgriffin Previous Member

    Simple Simon met a pieman going to the fair;
    Said Simple Simon to the pieman "Let me taste your ware"
    Said the pieman to Simple Simon "Show me first your penny"
    Said Simple Simon to the pieman "Sir, I have not any!"

    Simple Simon went a-fishing for to catch a whale;
    All the water he had got was in his mother's pail.
    Simple Simon went to look if plums grew on a thistle;
    He pricked his fingers very much which made poor Simon whistle.
    He went for water in a sieve but soon it all fell through;
    And now poor Simple Simon bids you all "Adieu"

    Simple Simon poem
     
  6. mgriffin

    mgriffin Previous Member

    What do ya know? simple simon SPEAKS french...so he must be FRENCH!!!!
     
  7. apex1

    apex1 Guest

    Ahh, you must not be shocked Mike. Look, if you ask some nonsense in your thread and the reply is not as you like it to be, you learn and improve your knowledge and ask better questions next time. That way the professionals here stay with you until there is a proper solution found for your problem. And they honour your patience and cooperative manner, so, your reputation grows.
    Other chaps do´nt like to learn, or to follow professional advice, they prefer to bother people with their unmature nonsense, or try to cheat 13 years old members with a sort of knowledge they did not have at the first post (the question was not to replace a flywheel, as he now likes to let you know, it was to remove it).
    So all have got what they deserve and you have naturally more, `cos you are not Simple Simon!

    Regards
    Richard

    and do´nt offend nationalities please.
     
  8. kistinie
    Joined: Aug 2007
    Posts: 493
    Likes: 8, Points: 0, Legacy Rep: -74
    Location: france

    kistinie Hybrid corsair

    Please

    Gentleman's

    Poesy is a wonder of life, but your debate should stay on a technical _ boat design level for the benefit of all

    Thanks !
     
  9. mydauphin
    Joined: Apr 2007
    Posts: 2,164
    Likes: 52, Points: 48, Legacy Rep: 575
    Location: Florida

    mydauphin Senior Member

    Something that might actually fit in this thread.

    the alternator in my truck (200amp) went bad. After replacing I kept core to experiment. I realize that voltage regulator went bad. I bypass it and this thing is know putting all kinds of power, upwards of 30 volts and I dont know how much amperage. It seems higher voltage is feeding Alternator field and making even more power. If I hook it up to charge regulator like the kind OUTBACK uses for solar panels I can convert those high voltage back 12volt without losing to much efficiency. Anyone have any comments on this idea. Ultimately , it want to run this via windpower in my farm...
     
  10. kistinie
    Joined: Aug 2007
    Posts: 493
    Likes: 8, Points: 0, Legacy Rep: -74
    Location: france

    kistinie Hybrid corsair

    mppt

    this is mppt regulation you are talking about i think, also called "inverter tech' when AC ouput
    This is also a BLDC motor controller" in regen mode

    Of course it works great :))
    more electricity means more Hydrogen !
    And think that electricity production can be full solar on an estate or truck vehicle.
     
  11. apex1

    apex1 Guest

    Yours should start to come to such level, after some hundred posts of nonsense. Thanks.
     
  12. kistinie
    Joined: Aug 2007
    Posts: 493
    Likes: 8, Points: 0, Legacy Rep: -74
    Location: france

    kistinie Hybrid corsair

    List

    Please give us the list of nonsenses i may have said and i will try to better explain it
     
  13. mydauphin
    Joined: Apr 2007
    Posts: 2,164
    Likes: 52, Points: 48, Legacy Rep: 575
    Location: Florida

    mydauphin Senior Member

    If one gets to like a million posts do we win anything???
     
  14. kistinie
    Joined: Aug 2007
    Posts: 493
    Likes: 8, Points: 0, Legacy Rep: -74
    Location: france

    kistinie Hybrid corsair

    No
    I am afraid no millions
     

  15. nero
    Joined: Aug 2003
    Posts: 624
    Likes: 13, Points: 0, Legacy Rep: 112
    Location: Marseille, France / Illinois, US

    nero Senior Member

    Thank you kistinie for the link to the physics website.

    I will now loose several more hours of time surfing interesting stuff.
     
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