Claimed OU circuit of Rosemary Ainslie

poynt99 · October 07, 2009, 09:04:56 PM

Rose.

All Glen's wave forms ARE periodic so far, that's why it IS possible to use one cycle. Come on Rose, give me a little credit $:-\$

.99

Rosemary Ainslie · October 07, 2009, 09:08:22 PM

Quote from: poynt99 on October 07, 2009, 09:04:56 PM
Rose.

All Glen's wave forms ARE periodic so far, that's why it IS possible to use one cycle. Come on Rose, give me a little credit $:-\$

.99

ok

poynt99 · October 07, 2009, 09:22:45 PM

poynt99 · October 07, 2009, 11:13:12 PM

Everyone / MH,

We have a slight issue.

I just noticed that with the resistor being mounted vertical, the temperature varies drastically depending on where the measurement is taken. For example, at the top of my resistor I've got 59 degrees C and at the bottom about 32 degrees C.

Is this really the best way to mount this resistor for this test, or where do we make the measurement?

This does make a lot of sense because heat rises. Even if the resistor is mounted horizontal, the top is most likely to be hotter than the sides or bottom. Again, this could really have an effect on the results, so it needs to be sorted out as to exactly what point is to be used for the temp probe or IR meter.

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poynt99 · October 07, 2009, 11:19:56 PM

Doing some rough measurements with my source power meter adapter (two 10,000uF caps and a 1% 1 Ohm resistor), I've got 54 degrees C at the hottest point (about 130 degrees F) using about 8.4W from the supply.

At present time my circuit goes into a funky oscillation mode if I try reducing the Gate resistance too much to bring up the spikes with this setting. Currently, this is only with 110V spikes. If I can reduce the Gate resistance, I'm certain the spike voltage can be brought up close to 500V as per Glen's.

Having this slow turn-on time is wasting power in the MOSFET, hence the 8.4W vs. Glen's 6W power draw for the same temperature rise. I'll try tomorrow to get this cleaned up so my results will be closer to Glen's.

.99