Tesla had invented a kind of two-phase induction motor, but the three-phase induction motor that is the ancestor of the modern induction motors was invented in 1891 by Mikhail Dolivo-Dobrovolsky (working in Germany at AEG), who had also invented in 1888 the three-phase grid, the three-phase generator and the three-phase synchronous motor.
The Dolivo-Dobrovolsky motor is the ancestor of all high-power induction motors, while the Tesla motor can be considered the ancestor of the single-phase induction motors that have been used (more frequently in the past than today) for several household appliances, like washing machines (or reel-to-reel magnetic tape recorders, a half of century ago).
Other way round. He invented the induction motor (1887) which the three-phase grid was then demonstrated to drive (1891). That's how influential it was. There are other reasons a three-phase grid is handy but being able to drive these brushless contraptions must have seemed utterly wild at the time.
A three-phase grid cannot drive a two-phase induction motor, like that invented by Tesla.
In 1891, the three-phase induction motor was invented by Mikhail Dolivo-Dobrovolsky, combining the principles of the three-phase synchronous motor previously invented by Mikhail Dolivo-Dobrovolsky with the principle of the induction motors invented by Nikola Tesla and Galileo Ferraris.
Like any inventions, the induction motors of Nikola Tesla and Galileo Ferraris had not sprung out of nothing, but they were based on the experimental observation that had been known for many decades that if you rotate some magnets around a disk of copper, the disk will rotate, even if the magnets do not have any action on the disk when stationary.
Because of the symmetry, it is easier to generate electromechanically three-phase currents than two-phase currents where the phase difference must be precisely of one right angle.
Dystopian Future 3: Elderly people getting scammed out of their life savings by scammers on the phone who sound indistinguishable from their grandchildren. (The ones who's grandchildren had their voices scraped from tiktoks.)
It was somewhat popular here in Argentina like 10 years ago. They call at 3 am, crying and after a 15 seconds they pass the phone to the captor/police/medic whatever. It doesn't matter that the voice is accurate.
While they are a problem, they are a different problem from spy cameras capturing you up close for the benefit of a single person. Surveillance cameras are for shady governments and maybe "security", camera glasses are for straight up creeps.
When things were on NVRs only some personnel had access to them and they typically rotated fate out every 30 days by default. Importantly they were not interconnected. They were their own silos. Now they are all tied in to central services and people with the right access can pull up anything from any of the devices regardless how irrelevant they are to an investigation.
The main problem is the interconnectedness.
They are realizing Hayden’s wet dream of total surveillance.
You should really think about changing out the engine and cabin air filters. And spark plugs. And unless you are driving 50,000 miles per year, I can't imagine the battery is going to last too much longer.
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