Shorting coil gives back more power

[DreamThinkBuild]

Hi All,

If you know your base frequency then you can divide it into quarters to find the frequency that will cut the peaks. So if your base frequency is 60hz, 60hz*4=240hz. 240hz will cut the 60hz signal 4 times 2 at the zero points and 2 at the +/- peaks. You could go 2 then just shift the phase also. So if you spike at 240hz to cascade at that peak it would be at 240hz*4hz=960hz. It will take a lot of phase tweaking or some kind of DSP chip to get it accurate at the next cascade.

Here is a example using circuit simulator (http://www.falstad.com/circuit/) :

$ 1 5.0E-6 27.727228452313398 50 5.0 50
159 320 432 320 304 0 20.0 1.0E10
T 224 304 320 432 0 2.0 1.0 -4.142115187299905 3.975745281449844 0.999
w 224 432 144 432 0
v 144 304 144 432 0 1 60.0 120.0 0.0 0.0 0.5
R 352 240 352 192 0 5 240.0 5.0 0.0 0.0 0.5
w 352 240 352 368 0
w 352 368 336 368 0
w 320 304 400 304 0
w 320 432 400 432 0
r 400 304 400 432 0 200.0
w 144 304 224 304 0
o 9 64 0 35 1280.0 6.4 0 -1

Doesn't have to be a sine wave input, a square wave signal will also work in the sim.

[bolt]

will the shorting cause the caps to eventually fail?  Understanding solid state is the way to go but will these components wear out as well?

Eventually most things wear out. TV sets usually die after 10-15 years after the electrolytic caps dry out and fail and the solder ages causing dry joints especially around HV points.  For high power pulse system then you need AC motor run oil caps is the best thing to use.

Are you that worried for Solid State generator only lasting 15 years before it needs a service?  A flimsy homebuilt generator with revolving wheels and magnets lucky if it lasts 15 days! LOL

[Magluvin]

I never thought to use the Sim for shorting. Glad it works.  =]

But there is something I was afraid of. I learned it while experimenting with an AV plug setup.

I found that with the AV plug, that the input power increased when loading the cap charged by the av plug.  And we also have that here.

I copied your Sim code and changed the switch freq to 2400hz. 10 times faster, could be more but the constant switching recommended by Stefan is why I tried.  ;]

I made a change to the active switch also. If you edit it, they start at 20ohm on res. ;]

I also added a scope shot of the input power. The scope may not show up when imported, as it didnt with the above code. Right click on the resistor and add scope, and right click on the input supply and add scope.  Right click on the power in scope shot and mark it for power consumpsion and negative peak readings to know pos and neg peaks.

The spdt switch turnes the switching off to compare.  We get more out, but we suffer more in also.
That was what I was afraid of. =[

Get the circuit sim at falstad.com

here is my code....

$ 1 5.0E-6 27.727228452313398 50 5.0 50
159 384 352 384 224 0 0.1 1.0E10
T 288 224 384 352 0 2.0 1.0 -0.362521623216979 0.22798362054968843 0.999
w 288 352 208 352 0
v 208 224 208 352 0 1 60.0 120.0 0.0 0.0 0.5
R 400 160 400 112 0 5 2400.0 5.0 0.0 0.0 0.5
w 416 288 400 288 0
w 384 224 464 224 0
w 384 352 464 352 0
r 464 224 464 352 0 200.0
w 208 224 288 224 0
w 416 288 416 208 0
S 416 208 416 160 0 1 false 0
o 8 64 0 35 598.6310706507378 2.993155353253689 0 -1
o 3 64 1 291 640.0 9.765625E-5 1 -1


Mags

Edit   sorry for the nasty screen shot   Im at lunch  will repost later if anyone wants to see it more clearly. ;]    The switch was off for the first half of the scope shot and on for the second. You can see the power rise with multi pulsing, but power in also climbs. Not to say this has anything to do with using motor gen as input if there is no drag. ;]

[i_ron]

Kone and others did all this YEARS ago.

Not so. Kone started this in the spring of last year with some crude mechanical switching. He has progressed to the point of FET switching but is far from multiple switching at this time.

His published fet switching directly from the hall device is not good engineering. His claims are not repeatable by woopy or myself.

Ron

[bolt]

SIM's are good i published plenty but remember they can not show Radiant Energy effects and any attempt for a simple math program to show a real gain creates an "impossible" divide by zero error and it crashes.

In practice keep the HF shorts on the sine peaks prevents i/p power lugging.