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Re: [axialflux] direct grid tie, Alternator micro controller

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  • jerry freedomev
                                Hi Steve and All,                          
    Message 1 of 14 , Feb 15, 2012
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                                Hi Steve and All,
                               
                                            While that is true with variable speed units but he was talking fixed rpm hydro which is completely different.   You'd need a 3ph grid to connect the standard 12 magnet/9 coil or change to even number of coils. mags and make a single phase stator. RPM depends of course on poles.  No different than other single/3ph alts on the grid.
                                           How do you think other 1-3ph syncronous motors, alts run on the grid? There are many ways to match them up like I said, just google electric motor starting circuits. Most don't require anything except switching on like you do many times/day.   If you are playing with 50kw then there could be problems but 1-2kw just isn't a big deal.
       
                                                                              Jerry Dycus
       
                                            
      From: Steve Spence <sspence@...>
      To: axialflux@yahoogroups.com
      Sent: Wednesday, February 15, 2012 8:34 PM
      Subject: Re: [axialflux] direct grid tie, Alternator micro controller

      The hugh piggott style alternator is not designed for direct grid 
      attachment. There is no way to synchronize the rpm. It's wild three 
      phase and requires rectification to dc, preferably for battery 
      storage, and use a grid tie inverter if you must connect to the grid.


      --
      Steve Spence
      http://www.green-trust.org
      http://www.essnmag.com

    • thorthesailor
      Could a bank of ultracapacitors stand in for batteries to provide some smoothing, allowing an all-off-the-shelf-components system? (Without the downsides of
      Message 2 of 14 , May 1, 2012
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        Could a bank of ultracapacitors stand in for batteries to provide some smoothing, allowing an all-off-the-shelf-components system?

        (Without the downsides of batteries)

        Michael


        --- In axialflux@yahoogroups.com, jeff marcato <jbm775@...> wrote:
        >
        > To; axialflux alt. member
        >  
        > From;  Jeff   Baldridge
        >  
        >            I am glad I found somebody to communicate with. I am building an alternator from Hugh Piggots book. Mine has 9 coils and 12 magnets on each rotor. It is for a small hydroelectric turbine, so it will always turn at about the same RPM.
        >             I want to put the electric output from the Alternator into the grid (grid-tie system) without using any batteries.I am wired into the rectifier now. that's is far as I have gotten now. I need a micro inverter with an input range of 10 to 30 volts. I need someone to show me how to wire this directly into my house electric  I need a diagram  and explanation and also where I can buy the micro inverter.  I could pay you a small fee for the information.                                     
        >
      • Steve Spence
        The capacitors would cost more than the batteries. -- Steve Spence KK4HFJ http://www.green-trust.org http://www.essnmag.com
        Message 3 of 14 , May 1, 2012
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          The capacitors would cost more than the batteries.

          --
          Steve Spence KK4HFJ
          http://www.green-trust.org
          http://www.essnmag.com


          Quoting thorthesailor <sailorthor@...>:

          > Could a bank of ultracapacitors stand in for batteries to provide
          > some smoothing, allowing an all-off-the-shelf-components system?
          >
          > (Without the downsides of batteries)
          >
          > Michael
          >
          >
          > --- In axialflux@yahoogroups.com, jeff marcato <jbm775@...> wrote:
          >>
          >> To; axialflux alt. member
          >>  
          >> From;  Jeff   Baldridge
          >>  
          >>            I am
          >> glad I found somebody to communicate with. I am building an
          >> alternator from Hugh Piggots book. Mine has 9 coils and 12 magnets
          >> on each rotor. It is for a small hydroelectric turbine, so it will
          >> always turn at about the same RPM.
          >>            
          >> I want to put the electric output from the Alternator into the grid
          >> (grid-tie system) without using any batteries.I am wired into the
          >> rectifier now. that's is far as I have gotten now. I need a micro
          >> inverter with an input range of 10 to 30 volts. I need someone to
          >> show me how to wire this directly into my house electric 
          >> I need a diagram  and explanation and also where I can buy the
          >> micro inverter.  I could pay you a small fee for the
          >> information.                                     
          >>
          >
          >
          >
        • Michael
          The ultracapacitors, if you caculate their life cycles, only last a couple years. http://www.cde.com/catalog/inverter/ If you over spec the voltage, (use a
          Message 4 of 14 , May 2, 2012
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            The ultracapacitors, if you caculate their life cycles, only last a couple years.
            http://www.cde.com/catalog/inverter/

            If you over spec the voltage, (use a 200V cap on a 100V peak ssytem) you may improve the lifetime.

            You also may need to "fuse" the cap bank, and the additional impedence of the fuse, may decouple the bank.

            Try the applets at the above link

            --- In axialflux@yahoogroups.com, "thorthesailor" <sailorthor@...> wrote:
            >
            > Could a bank of ultracapacitors stand in for batteries to provide some smoothing, allowing an all-off-the-shelf-components system?
            >
            > (Without the downsides of batteries)
            >
            > Michael
            >
            >
            > --- In axialflux@yahoogroups.com, jeff marcato <jbm775@> wrote:
            > >
            > > To; axialflux alt. member
            > >  
            > > From;  Jeff   Baldridge
            > >  
            > >            I am glad I found somebody to communicate with. I am building an alternator from Hugh Piggots book. Mine has 9 coils and 12 magnets on each rotor. It is for a small hydroelectric turbine, so it will always turn at about the same RPM.
            > >             I want to put the electric output from the Alternator into the grid (grid-tie system) without using any batteries.I am wired into the rectifier now. that's is far as I have gotten now. I need a micro inverter with an input range of 10 to 30 volts. I need someone to show me how to wire this directly into my house electric  I need a diagram  and explanation and also where I can buy the micro inverter.  I could pay you a small fee for the information.                                     
            > >
            >
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