I'm gonna try explaining how I understood what's going on from seeing this, I'm a layman so I appreciate any correction and opinion. So electricity is generating a magnetic field that makes the outer wheel and the inside wheel rotate by opposing each other. But if they start by having the outer wheel stationary as a stator would be, it'll be too difficult to push the inside wheel. So to make it as easy as possible to get them to start moving first, they allow the both wheels run free to get up to speed. Once the outer wheel which seems to be lighter gets up to speed, they start putting on brakes on it. And due to the magnetic interaction between the outer wheel and the inside wheel which acts like a stator and a rotor, braking the upper wheel down will speed the inner wheel up. Then you keep braking all the way until the outer wheel stops moving and acts like the usual stator, at which point the inner wheel will have spun up to speed with the magnetic fields generated by the electricity flowing through the outer wheel.

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This entire process could be automated, or made more friendly for people by putting a pair of tachometers out at the motor for motor cage RPM and output shaft RPM. An ammeter provides loading information and a set of power-factor correction capacitors can resolve any issues on the electrical line. A gear motor can drive the brake, and it may be monitored using an ammeter as well. The only thing left is to monitor the brake pad size via distance. I wonder if this was well ahead of the development of the wye-delta starter, and if the other company owned the patent on that,

Hello

Love how beefy it sounds when first firing up. I love how you can actually hear the revolutions increasing by the second. It’s like music. For saying that motor is 85 or 90 years old wow! What a machine

no one told dude that wheel does fuck all.

perhaps it could be used as a synchronous condenser in a vintage substation.

Steel alloy synchronous motors are like asteroids: their only terminal velocity is what has yet broken them. What a mighty beast and oh how great luck I am to witness such magnificence.

He forgot to use his turn signal.

Why is the stator spinning

This is the most "Half Life" thing you can see in the engineering room.

Bro was purging the reactor at the start there. (Alien Isolation reference)

So this motor has StaRotor or RoStator or whatever :D

is he turning a variac ?!

Even the stator is rotaring!!!????😮

why do you need brakes? why can't you just use air resistance to fight inertia?

I’ve seen this video a dozen times and it still thrills me

Invasive thought: Touch it..

Can you imagine the starting torque and the electrical demand if the stator was permanently stationary? It would probably register on the transmission grid every time. Temporarily swapping the roles of the rotor and stator is a clever way to get it started efficiently…

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When does the field excitation get applied? Does it just build up automatically? Or applied gradually as brake is applied?

Wounded how long it took to figure that out way back in 1907?

what the hell this thing power to, look like so heavy, it drive a factory machine and building itself or

YT gold

imagine just putting your finger nails to it and it sucked your whole body in

What is this used for?

It sounds like a air conditioning unit turning on when the motor starts up

I believe the two guys on the left are operating the turbo encabulator.

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The rotor sounds like a diesel engine at idle when the rotor is at peak rpm

I think more people would buy electric cars if they sounded like this.

WOW! When that motor hit full speed, that would have outright scared the shit out of me. LOL

that thing is TERRIFYING on startup holy shit

It's not a stator but a rotor. The fixed coils is the stator.

So is that wheel the operator is spinning some sort of "clutch" and is the big rotating thing at the start just a flywheel that stores a ton of kinetic energy that's gradually transferred to the actual load on the motor through that "clutch"? Idk what else to call it im probably wrong but this thing is cool as hell

I wonder how many amps this thing was pulling at the very beginning?

All that hp and torque , being fed theough a rubber belt

Sick beat

The start up noise reminds me of that one meme

Wow!

isn't it scary having tons of Metal spinning around with tousend of RPM

Hey this is a clever design feature. The stator doubles as a fly wheel.

Wherever this is has no OSHA apparently. Having a motor spinning that gast without a protective enclosure is an amputation waiting to happen. All they need is a removable cage. Just something to keep someone from accidentally (opposed to purposely) falling and catching an arm in the rotor.

The induction motor stops at exactly the same position it started.

A beast! What manufacturer and age is it?

Get that sound out of an ev, people will buy that.

Wow, that’s not terrifying.. idk what it is about old machinery but it just unsettles me… probably the crude simplicity combined with lack of safety measures

How does this work???

0:03 thats the sound of pure electrical current🔥🔥

Reminds me of my old sewing machine.