Swedish patent office web site:
Industrial Design
Design refers to the appearance of a product. When
we talk about design protection, we are talking only
about protection of the form or appearance. Patent
protection is required for the underlying technical
idea or function.
I was unable to locate the design rights Hartvigsen
has said that Ruyter. Maybe Ruyter could help with
this?
--- Joseph Hartvigsen <[EMAIL PROTECTED]> wrote:
> I agree with Rob that for small systems it is much
> simpler and more
> reliable to regulate the power rather than the water
> flow. Most of
> these small systems will be used for battery
> charging, but the power
> may be delivered as AC at higher voltage. In such
> cases there is an
> easy way to regulate the system by putting the dump
> load across the AC
> line rather than the DC.
>
> Rather than deal in general terms I'll explain how
> my recently
> modified system is set up.
>
> Power comes from the turbine driven induction motor
> as 3 phase AC at
> about 167V.
>
> [A side note: It is at 167V because it then goes to
> 3 transformers
> setup as 240V (delta) primaries and 32V wye/star
> secondaries then to a
> 3 phase bridge rectifier with the output connected
> to a 48V (56V
> typical) battery bank. Unlike single phase, where
> the RMS voltage of
> the rectified sinewave DC output is exactly the same
> as the RMS AC
> input, in 3 phase the DC output voltage is 1.35
> times the leg to leg
> AC voltage. So, the battery clamps the rectifier
> output to 48-56V
> depending on state of charge, which means the AC
> phase to phase input
> is ~52/1.35 = 38.6Vac, which means each of the
> transformer secondaries
> forming the wye/star is 38.6/sqrt(3) = 22.3Vac, that
> means the
> primaries are 240*22.3/32 = 167V. If I had used
> nominal 24V output
> transformers in wye to the 3 phase bridge, the
> primaries would run
> closer to the rated voltage. 24*1.35*sqrt(3) =
> 56.1V ]
>
> I used a solar charge controller, Morningstar TS-45
> and configured it
> in diversion load mode with its inputs connected to
> the battery +/-
> and outputs connected to two resistors in series.
> These resistors can be
> relatively low wattage, sized for only 30-50mA. For
> example with 60V
> peak battery equalization voltage, split across two
> resistors 50mA*30V
> = 1.5W and 30V/0.05A = 600ohm. So you could go
> with two standard
> value 680 ohm or even 1k-ohm resistors rated at 5W
> or 10W connected in
> series and connected across the TS-45 load +/-
> terminals. Clearly this
> won't dissipate much power, but it does provide a
> 24-28Vdc signal
> between the load (-) terminal and the point between
> the two resistors
> which I use to fire AC solid state relays (SSRs). If
> you have a 12 or
> 24V battery bank you can fire the 3-32Vdc triggered
> type AC SSR
> directly from the TS-45 output terminals. If you
> have higher than a
> 48V battery bank use more of the resistors in series
> and take the SSR
> trigger (+) signal from the opposite lead of the
> resistor connected to
> the (-) terminal.
>
> Now, whenever the battery bank voltage is at the
> control limit, the
> TS-45 in trying to dump power actually just sends a
> signal to trigger
> the SSRs. The SSRs are connected to AC line voltage
> from the hydro on
> one side, and a load resistor on the other side. You
> can find these
> relays rated to 25A (using a heat sink) at 240V for
> about $20 each at
> most electrical supply places.
>
> I had previously used some old oven and drier
> heating elements, but
> they took up too much space on the wall. So I put
> three 300W 16ohm
> edgewound and enamel coated resistors in series
> across the 167V from
> the hydro. That will dump in my case ~580W, but it
> is easy enough to
> size these resistors to dump what power you need at
> the generator line
> voltage.
>
> I purchased the resistors from digikey.com The 300W
> version are $16.48
> each, part number FVE-300-xx (xx is resistance in
> ohms from 0.5, 1.2,
> 2.0, 5.0, 8.0, 10, 12, 16, and 20). A larger 1000W
> resistor (black
> silicone finish rather than enamel coated) is
> available for $51.50
> each, part number FSE1000-xxx (-.25, .50, 1.0, 3.5,
> 4.5, 10, 15). Both
> also have a mounting kit available. Of course if
> you have a useful AC
> load of appropriate power and voltage rating that
> can be connected and
> disconnected such as a water heater use it.
>
> So, in simple terms, the PV load controller senses
> battery voltage,
> triggers SSRs which connect an the AC diversion load
> across the lines
> from the hydro.
>
> Joe
>
> http://h-hydro.com
>
>
> --- In [email protected],
> [EMAIL PROTECTED] wrote:
> >
> > A quick general note regarding regulation. It is
> my experience that
> in smaller
> > systems regulation is best done at the electrical
> output end rather
> then water
> > intake end. A power diverter using IGBT or TRIAC
> power elements, or
> even
> > relays, is by far the cheapest and most reliable
> way to govern the
> output of <
> > 5 kilowatt output systems. In the < 100 volt range
> these units are
> available
> > off the shelf from many vendors, while the 120V
> and up systems are
> more costly
> > and somewhat harder to to source. At the end of
> the day they are
> still a better
> > investment if only for the reason that you might
> still want one even
> with a
> > water flow diverter installed, in case the valve
> sticks open.
> >
> > Rob
> >
> >
> >
> > Quoting tom kasmer <[EMAIL PROTECTED]>:
> >
> > >
> > >
> > >
> > >
> > >
> > >
> > > using a PM motor as a generator has the
> following
> > >
> > > tenet. It has
> > >
> > > no regulation mechanism other than shaft speed,
> so
> > >
> > > here's what I suggest. You could rig up a smart
> bypass
> > >
> > > of the flow to regulate the speed so as to
> regulate
> > >
> > > the output power. Im sure that a magnetically
> coupled
> > >
> > > rotor excitation will indeed be expensive.
> > >
> > > Having a lot of experience in the fields of
> > >
> > > electricity and magnetism, unless this fancy
> generator
> > >
> > > has a few successful years
> > >
> > > of use in the field, I would stay away from it.
> You
> > >
>
=== message truncated ===
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