Wire resistance thermal drift, winding T calculated from R
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- Опубликовано: 23 дек 2023
- Talking about the temperature drift of the resistance of a copper (aluminium) wire or winding. Using the Temperature Coefficient of Resistance (TCR) to calculate the resistance from the temperature or the temperature from the resistance. Real life experiments with the resistance thermal drift in a transformer and a fluorescent inductor winding. Estimating the temperature of a winding based on its resistance change. Resistance thermal change calculation added to my online calculator:
ohmslaw.eu
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Thanks for another informative hands-on demonstration of resistance, temperature and "catculator" wisdom.
Merry christmas to you and your cat and dog man, happy new year. Thanks for another year of great content.
Hello sir, I am from India,your videos are very informative. I have been following you through your website and then RUclips channel since about 2014. Electronics is my hobby, I do electronic equipment repair work at home , which earns my living. I am learning a lot from you, thank you
Also, most of metals (copper and few precious metals can not go supercunductive at all) at certain low temperature starts exibiting superconductivity, or simply, resistance drops to exactly zero ohms. 😊
Using the positive temperature coefficient seen in metals one can design temperature probes with relatively linear temperature/resistance curve but highly stable and repetable one. For example, widely known platinum 100ohms, 1kohms, or copper 500ohms.
I have seen few variable frequency drives that can measure (with accuracy of 1-2°C) motor windings temperature using this effect, but they must be calibrated with every motor connected...
2:40 DGW seems to only have home made instruments. 😁👍
Happy New year to you too!
8:30 love your Humor 😂
Happy Christmas and merry new year to you all.
Merry Christmas and thanks for great videos all the time!
This was a very practical and useful video. Thanks!
Amazing!!!
Merry Christmas and Happy New Year too.
Thanks and happy holidays.
Thank you, something you would forget about when thinking up circuits. 😊
Merry christmas and thank you for the video.
Happy New Year also to you, cat and the dog.
Some 1960s 40W fluorescent lamp ballasts only had 15 Ohms or less resistance. Some newer ones have thinner aluminium windings and a smaller core. The same is true for older non-chinese vs newer chinese microwave oven transformers.
Fluorescent lamps peaked 20 years ago.
@@RK-kn1ud I still collect and use them as well as other discharge lamps. as a nerd I prefer plasma over LED.
Danke!
Chcem ti za toto video poďakovať a aj ja tebe prajem šťastné a veselé Vianočné sviatky a všetko dobré do nového roka, tvoje videá o elektronike sa mi veľmi páčia.
Me and my cat wish you and yours all the best.
Merry Christmas to you, too 🎉
Nice. Merry Christmas and a happy new year everyone...!!!
Merry Christmas ❤
Very interesting!
Merry Christmas!
Great video
Upload video every 3 days ❤ i love your videos, i alove long videos
Merry Christmas 🎉
VESELÉ VÁNOCE! 😀
Díky za podporu ;). Vám také přeju hezké Vánoce a povedený nový rok ;).
Merry Christmas
Temperature controlled vape boxes use the drift to keep the coil temp reasonably constant.
I got a ballast made in GDR i think. or west germany. I dont remember what it said exactly because i installed it in the garage.
its its 40w but i have 36w lamp in it. i wonder what happens overtime.
Great film material, a question that comes to my mind. How will an induction motor behave at very low temperatures? e.g. -40C?
My guess is it would be stronger and draw more current, essentially it would behave like a motor with higher power rating.
@@koharaisevo3666but then you have the higher friction losses due to the higer viscosity at that temperature.
In short, it all depends to what the motor is connected.
@@LMB222 You're right, the engine will definitely draw more current to do the same job. There will also be a problem with bearings and condensation in the engine.
I'm thinking about a servo motor, because there will be a lot of variables there 🤣
And the main question is how to make it work and not only for a while? 🤣
👍
What is your opinion on those radio water meters?
Example: METRA E-RM30
cooptherm cz metra-e-rm30
A teardown, and biopsy would be very interesting.
Interesting information, thank you!Maybe you could also make a video about why the transformer or coil expected life time is shortening so much if the "tw" is exceeded even 10 °C? One could think that transformer is only copper wire and some isolation material (when not taking about oil filled high power transformers in power distribution lines) and there is only a limit when the transformer fails (insulation melts down and causes short circuit between windings) and below that the transformer life time is more or less forever.
Hey I was watching ur welding machine video which was 5years ago and when will day come it will be in proper box
Why don't you use your big resistance meter?
That thing puts 25 A at the lowest setting though the device under test, that wouldn't be very suitable to do this experiment.
Yes, 25A is too much. Maybe for a very thick wire. This test current would significantly skew the temperature of almost anything.
That big resistance tester is perfect to test chinesium cable :)
I just love the Ikea joke 😂😂👌
I never knew inductors had a lifespan. Just assumed they were solid state therefore basically last for ever. 👍😎🌲❄️
Nothing and nobody lasts for ever. The insulation and the wire lacquer (enamel) deteriorates, and the rate od deterioration depends greatly on the temperature. But it can outlive you if the temperature stays well below the maximum.
Structures built of granite will last forever. Its the hardest rock. The victorian built stone buildings in the UK will basically last forever with minimal maintenance. Also think of the 2000+ year old roman buildings.
@@simontay48512000 years is not forever though, I'm pretty sure it would break the laws of physics if something actually lasted forever
Entropy - rules!
Sir, today I have made DK124 SMPS 12v circuit, by looking at the datasheet diagram of IC, 12 volt is there without load and when 12v is 1A load it is coming down to 4 volt, what could be the reason for this?
what this balast/lighting transformer form-factor is called?
I am having trouble searching for them online
There's a reason the Borg say "Resistance is Futile", when things get hot, stuff dies... :P
imagine getting a heart from diodegonewild
You can measure low resistances, you only need 30kg of iron in a box
Hahahaha, so I assume you reviewing Ikea's latest products that they'd sent you for free to review will not happen any time soon on this channel :)
Had two cats for 12 years till coyotes. Cant say I miss cats crawling around all night, red eyes, fleas, dander, scratching everything, stink, buying food. Other than that cats lovely
můžeš mluvit česky
See his other channel 👍😎
@@techtinkerin žiješ v čechách že
I just love when you go off with your rants about shitty manufacturing routines nowadays and all these pseudo-savings and pseudo-ecology.
Graphite! 👍
Merry Christmas!