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Unexpected interaction during experiment (Patreon)

Published:
2023-06-03 19:27:12
Imported:
2023-06

Content

A quickie before the weekend live stream.

I was experimenting with a fan that I had removed the humidity sensing controller from (for reverse engineering), and while putting various capacitors in series to try and tame the fan down a bit, it suddenly went into turbo mode.  I managed to hit a perfect combo that resulted in the fan running much faster than it normally should.

https://www.youtube.com/watch?v=LZkJJAissM4

Files

What the heck! Series capacitor makes fan go TURBO!

I was disassembling a fan to reverse engineer its electronic humidity control and experimentally put some capacitors in series with the fan to slow it down. No series cap 242V 14.5W 90mA (0.66PF) 220nF the fan struggled to turn - 95V 1.5W 22mA (0.27PF) 470nF the fan ran at about 1/3rd the power - 157V 5.5W 51mA (0.43PF) 1uF the fan ran at SUPER TURBO POWER! - 300V! 24W 120mA (0.8PF) I'm guessing I may have hit a perfect inductor/capacitor combo to result in such a dramatic result by somehow creating a phase shift that added to the supply voltage. It's not something I've come across before, and makes me realise that in the wrong situation this could cause weird problems with equipment. If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- https://www.bigclive.com/coffee.htm This also keeps the channel independent of YouTube's algorithm quirks, allowing it to be a bit more dangerous and naughty. #ElectronicsCreators

Comments

Jeff Larson

It would be fu to use a variable capacitor and tune it to the motor max speed. The PF should equal 1 at that point

Belgrath

It's a turbo not a cap :P

Anonymous

Off the subject… you ever get dna results back from that jet black Chinese hair you found in a battery bank a few years ago? I just got curious

Circuitmike

Obviously you've discovered free energy - or, at least if you make a video claiming such - free money. I think UFOs are powered by this technology.

Anonymous

What about hooking an oscilloscope on that? I'd say that might shade some light. I think you just accidentaly made one of those "power factor fixing" boxes, but the correct way. :)

Anonymous

Hey Clive, You've just made a simple series wresonant circuit at 50hz. It will pull way more current at wresonance, and depending on the Q of this arrangemant, the volts across both the cap and the inductor could get way high! So, in a funny way, it's a perfectly power factor corrected wresonant short that will probably have a vastly better reading according to the Hopi! Would be interesting to play around and see if you can get it even faster with some finer cap tweeking!

bigclive
>>110002837

Technically speaking it would have been interesting to get that mystery Chinese person's ancestry. But I'm not sure if they accept hair for that test.

Whippet Gas

It's basically witchcraft.

Jonathan Hughes

I am still trying to come up with a mathematical equation that works. But it seems to me everybody else is just giving Theory.

bigclive
>>110192702

The formula that probably applies here is for a tank circuit. Quite complex as it has to use the inductance of a spinning motor, the capacitor and the mains frequency.

Mike Page

Maximum power is delivered into a load whose impedance is the complex conjugate of the supply's. You changed the reactive part of the supply. You observed a power increase.

Miek Buchanan

I keep thinking that something similar happens when you put a capacitor after a bridge rectifier for LEDs. Since it’s smoothed by the cap, it allows it to spend more time in the “gimme more power” part of the sine wave?

bigclive
>>110881689

The capacitor will charge up to the peak voltage of the sinewave, which results in a much higher continuous DC voltage.