According to the article the Model 3 uses 520 grams of neodymium. https://www.popularmechanics.com/cars/hybrid-electric/a43773686/rare-earth-metal-motor-tesla/
Archive for the ‘Magnetics & Electromagnetics (not coils’ Category:
2023-11-13 Dolivo-Dobrovolski, A Contemporary Of N. Tesla, Invents 3-phase Generation In Germany.
Kathy tells about Dolivo-Dobrovolski, a contemporary of N. Tesla, invents 3-phase generation in Germany. History Of 3-Phase Electricity And It’s Distribution
2023-09-18 Smart Mag Magnets Are Amazing
I saw these on an episode of The Action Lab on YouTube. The black one is very interesting – it seems to make a good frictionless bearing. https://www.magnetics.com/group_smartmag.asp
2023-07-16 26H20 Radar Repair At Ft. Monmouth, NJ
In 1966 I completed basic training and went to Ft. Monmouth, NJ for 10 months of Radar repair training. The last half of the course we got to work on the actual Radars in *that* barn-like building in the photo. I was on the graveyard shift. There were birds flying around up in the rafters
(Read More…)
2021-07-10 SMES Superconducting Magnet Energy Storage
Bill Sherman told me about SMES which has already been put into use commercially. One of the concerns is how much energy is wasted to keep the magnets cryogenically cold. Another cost concern is the superconducting coil has to be made of a material that contains very expensive rare metals. https://en.m.wikipedia.org/wiki/Superconducting_magnetic_energy_storage
2020-07-12 The Safire Project
I happened to find this website for a nuclear fusion research project that makes claims about getting more energy output than it puts in. They talk about an artificial sun on earth. I have read about some amateur experimenters making a cold fusion system on a small laboratory scale, and this Safire Project seems to
(Read More…)
2016-09-05 Ferrite Cores At Radio Frequencies
I have always thought that using ferrite toroid cores for radio projects at HFs and above was not necessary, because all of the RF circuit parts lists call for low permeability powdered iron cores. I’ve never given it much thought; about the only thing that crossed my mind was that the powdered iron cores may
(Read More…)
2015-03-30 Crazy Geiger Counter
A relative was more than a little bit concerned, and sent me this link. Dangerouse 32,000 mcR/h Radiation Reading by My New Geiger Counter from …: https://youtu.be/VuGL97jjI3k These are false readings. The Geiger counter is receiving electromagnetic interference from the light and falsely interpreting it as counts per minute. There is actually very little radiation
(Read More…)
2014-06-19 How To Make A Toroid Core
A long time ago, probably 200 years, the scientists experimented with electromagnets by winding copper wire onto a bar or rod of steel. Most anyone that is taking a physics class has been introduced to this electromagnet. This works ok for a battery or direct current but when the current is alternating the solid steel
(Read More…)
2014-03-20 How To Make A “Monopole” Magnet
One of Xee2vids videos is how to make a monopole magnet. It shows 2 south poles of the magnets and the magnetic lines converge inwards. I remember seeing this in textbooks and it’s shown that magnetic lines of force from two like poles diverge away from each other. That’s the opposite of how it’s shown
(Read More…)
