Electrolyzer oscillations

[waterbard]

Ok, I am starting this thread because I don't understand what is going on. I have a 2 plate cell, with distilled water, and some 'impurities', not caustics, or acids, but not dirty equipment either. Regardless, I am getting odd readings that I don't understand.

I am taking a cheap wall dc power supply, and hooking it up to my unit. Without anything else, I am getting a pure sawtooth wave, at 2.2 vdc now, at 130hz. This is AC freq on a DC current, at about 15 volts dc, on a 20 vdc power supply.

Again, I measure the power supply freq by itself, and its completely flat at 20 vdc. I adjust the oscilloscope and read around 1.something mhz, the peaks are hard to count as they keep moving.

I have been doing some research on sawtooth waves, and all I can find is that it originally was a sinewave, but with the 25th harmonic.

Another weird thing, that happened only once, was that at one point, the sawtooth wave inverted to where it the peak was in the beginning of the wave. The rest of the time, the peak was at the end.

Any ideas? 'Hey, stupid, its just this' comments are welcome as well. I just wanna isolate this and move on.

[waterbard]

[medwards06]

[waterbard]

[medwards06]

I am sorry if this comment seems obvious to you. I do not have any detail of your circuitry or configuration but, battery heating up means it is tryingg to dump its power quickly in to the load as the result it heats up. Harmics are multiples of a given frequency and they are always integer in relationship. Feel free to PM me with details. This is an area I am currently in working myself.

[waterbard]

Interesting paper I found, I haven't bought the whole version, yet:

Titre du document / Document title
Ferroresonance in electromagnetic voltage transformers : A study based on nonlinear dynamics

Résumé / Abstract
Ferroresonance in electromagnetic voltage transformers, fed through circuit breaker grading capacitance, is studied using nonlinear dynamics methods. The magnetising characteristic of a typical 100VA voltage transformer is represented by a single-valued two-term polynomial of the order seven. The system exhibits three types of ferroresonance: fundamental frequency ferroresonance, subharmonic ferroresonance and chaotic ferroresonance, similar to high capacity power transformers fed through capacitive coupling from neighbouring lines or phases. Results also show that while fundamental frequency and subharmonic ferroresonance can occur under commonplace operating conditions, chaotic states are unlikely in practice.

Don't know if its related, but I'll keep digging.

[waterbard]

medwards06, I sent you an email btw

[MarkinAustralia]

[medwards06]

[nobody]

[medwards06]

[waterbard]

[olympios]

[nobody]

[aussepom]