What goes into the inverter is already 3ph AC varied frequency. The
computer keeps the internal DC bus at a specific voltage needed for the
line voltage out roughly 156 volts DC or so, much depends on the wave it
produces. This voltage reading determines if there is a fault making the
AC output shut down should the input not keep up with demand. One knock
off generator I have tested, produces 56v at about 300rpm, this is
perfect for my 12v wind generator.
The motor is controlled via a stepper motor that could be controlled by
your own circuit should you want to build your own controller.
You will need to rectify the 3ph generator output of the perm mag
generator and feed the DC bus voltage to your controller through a AtoD
converter to keep the voltage where you want it.
You could make your Honda into a three stage smart charger if you are
savy enough. If you are then feed the flock with your circuit as many
may tear into their Honda's apart and convert them as well.
Kevin Pemberton
Matthew Geier wrote:
> Angela wrote:
>
>> I would love a PolarPower DC generator, but can't swing the price yet. Has anyone bypassed the internal inverter in the Honda EU series to give high DC volts/amps? I know there is a 12v battery charging circuit, but I want 100volts 20amps or thereabouts.
>>
>>
> The inverter in the Honda does more than just 'invert', it's the magic
> that lets the engine speed vary while the voltage/frequency output stays
> the same. The engine governor is probably intimately connected to the
> inverter, my EU20i has nice diagrams of how every thing is connected,
> but that's at home and i'm at work...
> I think the 12v battery terminals are only 12v when the 'eco mode' is
> turned off, thus the engine speed is locked.
>
> The practical upshot is that the output of the alternator connected to
> the engine probably varies wildly in voltage and frequency and a lot of
> the efficiency of the Gen-Set is lost with out the inverter and it's
> control circuits. You a probably better of hacking up a cheaper
> non-inverter type gen-set that has a simpler engine speed governor.
>
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