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resonance energy storage experiment

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LAN_403

Plasma

Tue Aug 20 2019, 08:41PM

Registered Member #61406 Joined: Thu Jan 05 2017, 11:31PM
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Found a halogen bulb from one of the scrap microwave ovens.

At resonance it is quite dim, moving away it lights up abit, then dims thought away. I'm guessing at resonance the tank stops a lot of current, when it moves away it allows more, but the series then become resistance, even further, the series dominates.

083215

Conundrum

Fri Aug 23 2019, 04:49AM

Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
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Posts: 4059

What parts did you need??

Plasma

Sat Aug 24 2019, 04:27AM

Registered Member #61406 Joined: Thu Jan 05 2017, 11:31PM
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It changes :) I can get what I need, just not all at once.

The bulb is 240V 180Ohm, connected along one it lights up around resonance, higher or lower it goes out, its a light red colour, I'm guessing 10V.
I think if I get a 12V bulb I can add resistance to get a ballpark of the voltages. Order one more stage, see if it brightens the bulb, otherwise back to square one. At least I know my DMM can't detect AC above 40khz.

Plasma

Wed Aug 28 2019, 03:59AM

Registered Member #61406 Joined: Thu Jan 05 2017, 11:31PM
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Making the series part uneven worked, connected from the right side as ground then measured to the top of all three tank circuit, makes the bulb light up the same. Just realized that the voltages are across the inductor or capacitor not across both. Its powered by 18V 200mA, I think most of the power makes it to the bulb?
I think this will be the way to go, and just increase the power supply up to 240V, connect the grounds to the left side double the brightness on the right side tank, but the other two were dimmer.

152514

Plasma

Fri Nov 08 2019, 09:59PM

Registered Member #61406 Joined: Thu Jan 05 2017, 11:31PM
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Built a bridge with a Ne555 driving it at 45khz when tested by it self, with the bridge connected it reads 331khz at 2.8v, the 555 was 6.8vdc. No components gets hot and a 10ohm resistive load on the Ac cables drops the volts to 2.6vac.
Not sure why the frequency got screwed .

105146

Done some testing, each stage increases in voltage and the circulated current increases. Its at 45.6khz with resonance at 49.5khz which might explain low increases, open circuit on the AC leads is 2.8v with the storage goes to 3.67v but has gone up to 6v for 1&5 thinking the bridge design isn't that good or stable.

145054

Plasma

Tue Nov 12 2019, 02:30PM

Registered Member #61406 Joined: Thu Jan 05 2017, 11:31PM
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I added some resistor's to the 555 to increase the frequency to 49.1khz, the open circuit voltage from the bridge is 3.5acv, measuring from the storage part ground to the top of all three tanks shows 3.3acv.
If the series parts were just capacitor or inductors, it would form a voltage divider , with capacitor plus inductor out of resonance forms a voltage divider, but when the frequency is close enough they see the same voltage level.
Desoldering one leg of a tank, and measuring the current gets 13mA, I'm guessing circulation current, or the current through one of the elements.

Got to workout why the bridge is powered by 18v 200mA supply, but the output is only 3.5v

Store

Plasma

Sun Nov 24 2019, 05:15AM

Registered Member #61406 Joined: Thu Jan 05 2017, 11:31PM
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Built a H bridge like the one recommended by Suleiman's. Try it on a tank circuit with a bridge recifer, adjusting the frequency from 20-80khz the voltage stays about the we, but measuring Ac current, closer to resonance it draws 140mA but drops to 10mA at around 20khz. I didn't think it worked like that?

Check a series circuit the voltage is about 6V, but there is no current as high as MA at any frequency.

Plasma

Mon Nov 25 2019, 03:05AM

Registered Member #61406 Joined: Thu Jan 05 2017, 11:31PM
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Made a error in the last post, turning anti clockwise moves it away from resonance, increasing the current draw, and lower clockwise. The volts for the series circuit didn't change much.
With out any load the DMM measured between 200-300mA with 100mA between each P fet leg and 200mA for the Schmitt trigger makes 700mA about half of the power supply, might explain the 5V open circuit on the bridge.

Plasma

Tue Nov 26 2019, 04:02AM

Registered Member #61406 Joined: Thu Jan 05 2017, 11:31PM
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These are some tests I did, I will duplicate them with a larger current supply ,it should help the series circuit, there's less of a voltage drop at 47khz, which I think will be more reliable than measuring the current to find resonance.

Measuring the line current at resonance got 14mA with about 3vac, the impence of the tank is 14^2/1 =196Rp
3Vac/196Rp =0.015mA
Circulation current
3vac/14Xl =200mA
With a Q of 14.
Connected a 1ohm resistor in series with the inductor, a measured the current across the resistor it was 7mA, if the DMM leads are 1 ohm it should be about right.

To get 5A will need 66V , the 5A is max for the inductor.

165605

Plasma

Wed Nov 27 2019, 05:01PM

Registered Member #61406 Joined: Thu Jan 05 2017, 11:31PM
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Changed the design from what I had, the series circuit was too high impendence. It now is a chain of bandpass filters, have just one tank the current drawn was between 17-130mA but mainly low values, after each stage added it still topped out at 130mA but they average high values.
055428

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