Induction motors - ever wonder how they're made?

[Rubycon]

Good video with layman's terms explaining how they are made.

http://www.youtube.com/watch?v=CBFE-Bt7RjY&feature=related

 

[deadlyapp]

goddamn vendors show me a video about how they make their induction motors once or twice a month :\

I especially like the 10,000hp+ ones. We've got a 25,000 hp one in our test bed that is fun.

 

[Rubycon]

We have two 27,000 hp motors that live under water. :awe:

 

[SirStev0]

I have three 27,000hp in SPPPPPPPPPPPPPPPPPPPPPPPPPPPPAAAACEEEE!!!!!!!

In all seriousness cool video though.

 

[BrokenVisage]

I N D U C T I O N

/caps

 

[basslover1]

Stuff like this always makes me wonder:

What do the machines look like that make these machines that make the stuff we use?

 

[Howard]

Silicone steel. Sigh.

 

[Howard]

Stuff like this always makes me wonder:

What do the machines look like that make these machines that make the stuff we use?

There are lots of machines used. Mills, lathes, wave soldering ovens, brakes, presses, etc.

 

[Jeff7]

Nooooo, not again! Thanks to your 42,000 Amps thread, I spent more than an hour on how-it's-made videos on Youtube.
I finally find my way back here, and I'm getting pushed right back out.

Silicone steel. Sigh.

Yeah, I heard that too.

 

[Red Squirrel]

Pretty cool to see the manufacturing process. Wow some of those shafts are huge.

Wonder what kind of power it takes to spin one of those up. I'm guessing somewhere in the 600v 3 phase range.

 

[BUTCH1]

We have many of those Baulder motors at work, they're considered the "Cadillac" of industrial motors, very rugged...

 

[TheSiege]

And to think this technology was patented in 1888 by Tesla

 

[Puppies04]

Wow some of those shafts are huge.

 

[Born2bwire]

I closed the tab when I heard them talking about large, extruded, steel shafts. Such a dirty mind Rubycon.

 

[Howard]

Pretty cool to see the manufacturing process. Wow some of those shafts are huge.

Wonder what kind of power it takes to spin one of those up. I'm guessing somewhere in the 600v 3 phase range.

The shafts are on bearings. It would take very little power to actually get them to start spinning, though to accelerate them quickly obviously requires more.

EDIT: Of course, it's a different story if you try to spin the motor through the output shaft of an attached gearbox.

 

[Rubycon]

Pretty cool to see the manufacturing process. Wow some of those shafts are huge.

Wonder what kind of power it takes to spin one of those up. I'm guessing somewhere in the 600v 3 phase range.

Yes some shafts are long, hard and big. Comes with the territory for the driven load.

It really depends on what kind of power is available and what size of the motor. I've seen some decent sized motors (>400hp) running on 480V and some 600hp motors running on 4160V.

Startup power draw with across the line starting is tremendous. Even if nothing more than the motor (test) for an instant there will be inrush equivalent of LRA (locked rotor amperage). Smaller impeller centrifugal chillers using a gearbox will pull close to LRA for few seconds as speed builds up. The whine these motors makes is impressive.

http://www.youtube.com/watch?v=T2GctcY6tp0

We have bow thrusters that are powered by a 4000 hp pump (each). These start directly off the 11.5kV mains bus and will (briefly) pull about 15MVA each on starting. It creates a brief flicker ship-wide. If I have my smartUPS 3000 set to high quality power it will transfer to battery when they are started. Amazing how much power that is and those are started under minimal load.

 

[SagaLore]

That seems like an excessive amount of metal used to make the motor.

Have we not come up with a more efficient motor yet, that utilizes carbon and ceramic materials?

 

[borisvodofsky]

That seems like an excessive amount of metal used to make the motor.

Have we not come up with a more efficient motor yet, that utilizes carbon and ceramic materials?

We're short on fossil fuel, not iron, at all.

Input cost of iron is like 0 dollars. They can't give this stuff away.

It's kinda like how books are worth as much as it cost to transport.

 

[Franz316]

Electric motors awesome! I'm actually working on building my own wind turbine as a weekend project type deal and it is a lot of fun. At first I tried using a a treadmill motor but it required too high RPMs to generate the volts I needed so now I am actually making my own generator. I just finished the stator this weekend, wrapping the the copper wire is a pain and is tedious. I also found out that neodymium magnets are no joke and will crush your hand in a second.

What I love about electric motors are that they are only limited by the power they receive. Once we get the storage issue solved, we will see some very fast cars that will out perform gas engines handily.

 

[borisvodofsky]

Electric motors awesome! I'm actually working on building my own wind turbine as a weekend project type deal and it is a lot of fun. At first I tried using a a treadmill motor but it required too high RPMs to generate the volts I needed so now I am actually making my own generator. I just finished the stator this weekend, wrapping the the copper wire is a pain and is tedious. I also found out that neodymium magnets are no joke and will crush your hand in a second.

What I love about electric motors are that they are only limited by the power they receive. Once we get the storage issue solved, we will see some very fast cars that will out perform gas engines handily.

That's like saying, once we have cold fusion, the children of the world will never go hungry. :whiste:

aw, but i'm just being a cynic arn't I, damn, sry.

 

[SagaLore]

That's like saying, once we have cold fusion, the children of the world will never go hungry. :whiste:

aw, but i'm just being a cynic arn't I, damn, sry.

But children can't eat cold fusion. ...can they?

 

[Red Squirrel]

That startup sound is sex to my ears. And quite impressive about the bow thrusters, and those are the "small" ones for sideways movement right? Not the main forward one? That's an impressive amount of power.

 

[Rubycon]

That startup sound is sex to my ears. And quite impressive about the bow thrusters, and those are the "small" ones for sideways movement right? Not the main forward one? That's an impressive amount of power.

Yes the main propulsion is handled with a pair of ABB azipods, 20MW each. Total propulsion power combined is 66,000 hp. Of course there's 92,345 tons to move.

 

[Squisher]

We had a fatality at work when a 100 HP motor blew up. I still have paint on my tool box where they found parts.

 

[Rubycon]

How did that happen?
I've heard of pumps getting ripped off their mounts, breaking flanges, etc. when the engineer did not check for free rotation of the shaft before starting the motor. That's pretty bad when the pump (175hp) is moving concentrated sulfuric acid.