Rosemary Ainslie circuit demonstration on Saturday March 12th 2011

[poynt99]

Guys a quick word here.  I challenge anyone to do a simulation where the phase angles are at precisely 180 degrees.  If they are not precise then, as day follows night - they'll ring and cancel out at zero.  At 180 degrees they'll reinforce each other.

Kindest as ever,
Rosemary

Is this getting close Rose?

As soon as I entered the load resistance and inductance values on Donovan's schematic, my previous simulation burst into oscillation, when previously, it was not so evident. The 180º phase is there, but the wave shape is not "tuned" exactly.

I am sure that with some adjustments to the component values, or adding in a few more "parasitic" wiring inductances as Humbugger used, I may be able to do better, if this isn't already close enough that is.

.99

[Rosemary Ainslie]

Poynty - everything is falling off the page.  But from what I see , all is correct except that the shunt voltage should default to zero. 

Well done.  And what a pleasure to see it.  Now.  How do you factor in that zero default?  Can your system do this? 

Also - when the system goes into higher wattages - can you do the same there?  Or is that what you're showing?  Because at higher wattage outputs there's some serious spiking.

Well done Poynty.

Regards,
Rosemary

[poynt99]

Not sure what you mean by "default to zero".

What part specifically is not correct yet?

.99

[Rosemary Ainslie]

Check out our shunt waveforms.  During the 'on' time - there's zero voltage across the shunts - zero
discharge from the battery.  It only STARTS oscillating when the negative trigger kicks in.  Mags has
an explanation for this.

Regards,
Rosemary

[poynt99]

If you look closely, you can see that Vshunt is ringing down to zero.

I didn't say it was perfect. 

OK, I see what you mean now....zero volts. I'll play with it and see what I can do.

.99