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Hi guy's, I think with looping this system, it's all about the energy.
If a 30 uf cap is used with 220 volts, then each cycle a maximum of 726 millijoules
can be transferred through the FWBR to the 600 mH inductor, which as long as
it can store the 726 joules should then convert it to just under 18 volts in the
4700uf capacitor feeding the inverter. (Maybe that is for each half cycle.)
If you use 260 v which is the normal open circuit voltage of a regular 240 volt
inverter, (I have one) (mine is a sine wave inverter) then with 260 volts and
30 uF there will be a maximum of 1.014 joules which should charge the cap to
about 21 volts. Maybe not too good for a bought inverter, I'm not sure it
might depend. one can be made to work from that.
This is based on the maximum energy the capacitor can pass with each AC
"half" cycle I think.
Applying the load should drop the voltage to under 250 volts.
However two things could be done, use a smaller than 30 uF 275 - 400 volt
cap or use a larger than 4700 uF capacitor for the lower voltage maybe rated
to 35 volt or more might be better just in case, a larger cap there will cause
the energy to charge the cap to a lower voltage.
I think it might be necessary to ensure the inductor can store all or nearly all
of the energy that the 30 uF cap could supply it in that situation. If the
inductor did not cause enough voltage drop or store enough of the energy
then there could be problems.
That's how I see the looping working. If I'm not exactly clear I can try to
elaborate more. Remember I'm not an expert, just a thinker. When I look at
the circuit and have a think about it that's what I see. I could be wrong.
The idle current of a regular inverter can be a bit more than is possible with a
made one. And a made one can be repaired cheaply if a mishap should occur.
However the idle losses of a made one will be mainly from core and copper
losses. Bought inverters often have an AC cap across the AC output which in
my experience always increases idle input power.
For resistive loads that cap across the output is not really needed in my opinion.
We must remember to be very careful if using medium voltages and low frequencies.
Not all inverters are equal I have one which the voltage is 260 volts open
circuit and drops with load ( a cheaper one), but I also have a true sine wave
inverter ( a more expensive one ) which keeps 230 volts across the output all
the times as far as I can tell.
Cheers
If a 30 uf cap is used with 220 volts, then each cycle a maximum of 726 millijoules
can be transferred through the FWBR to the 600 mH inductor, which as long as
it can store the 726 joules should then convert it to just under 18 volts in the
4700uf capacitor feeding the inverter. (Maybe that is for each half cycle.)
If you use 260 v which is the normal open circuit voltage of a regular 240 volt
inverter, (I have one) (mine is a sine wave inverter) then with 260 volts and
30 uF there will be a maximum of 1.014 joules which should charge the cap to
about 21 volts. Maybe not too good for a bought inverter, I'm not sure it
might depend. one can be made to work from that.
This is based on the maximum energy the capacitor can pass with each AC
"half" cycle I think.
Applying the load should drop the voltage to under 250 volts.
However two things could be done, use a smaller than 30 uF 275 - 400 volt
cap or use a larger than 4700 uF capacitor for the lower voltage maybe rated
to 35 volt or more might be better just in case, a larger cap there will cause
the energy to charge the cap to a lower voltage.
I think it might be necessary to ensure the inductor can store all or nearly all
of the energy that the 30 uF cap could supply it in that situation. If the
inductor did not cause enough voltage drop or store enough of the energy
then there could be problems.
That's how I see the looping working. If I'm not exactly clear I can try to
elaborate more. Remember I'm not an expert, just a thinker. When I look at
the circuit and have a think about it that's what I see. I could be wrong.
The idle current of a regular inverter can be a bit more than is possible with a
made one. And a made one can be repaired cheaply if a mishap should occur.
However the idle losses of a made one will be mainly from core and copper
losses. Bought inverters often have an AC cap across the AC output which in
my experience always increases idle input power.
For resistive loads that cap across the output is not really needed in my opinion.
We must remember to be very careful if using medium voltages and low frequencies.
Not all inverters are equal I have one which the voltage is 260 volts open
circuit and drops with load ( a cheaper one), but I also have a true sine wave
inverter ( a more expensive one ) which keeps 230 volts across the output all
the times as far as I can tell.
Cheers
I also used the diode from the battery so the battery couldn't be charged. 
as usual, it shows pretty much the same result with two
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