There are more large motors like that around than you might suspect. The local Omnisource scrap yard had a 6000 hp motor blow and they replaced it with a bigger motor. I think 8000 hp. They shred cars and whatever else they can fit into it.
I went to an aluminum recycling place once that needed some help with their controls and they had a 5000 hp motor driving their aluminum shredder. The motor looked like a small building with a big shaft hanging out the side. Every once in a while the shredder would jam up and people would have to climb into the machinery with pry bars to get the stuck pieces out.. no thanks... That machine was crazy loud. They used front end construction loaders to load the conveyor that fed the shredder. The result was small mountains of shredded aluminum. There is a steel mill nearby that has some huge motors that drive the roller shafts directly - no gearboxes. The motors are so big that they have doors in the side of them with steps leading up to the doors so people can go into the motors to service them. The doors are full height..not short ones.. Those motors run off of Cycloconverter drives. Also crazy big. http://en.wikipedia.org/wiki/Cycloconverter Dave On 4/30/2013 3:20 PM, Pete Matos wrote: > John > That is amazing to me man....i mean I have seen some monster electric > motors before but 3k HP is nutz ...... I know the motors they used on the > draw bridges in South Florida where I used to live were big DC I believe > and they lifted some amazing loads via counterbalance and gearing. Lots > of industrial application for motors like this. I also find it > interesting that there is so much resistance to electric vehicles in the > world when so many of the largest and most powerful vehicles are moved with > electric power. It is an awesome force and must be interesting to work in > that field. Peace > > Pete > > > > On Tuesday, April 30, 2013, John Kasunich<jmkasun...@fastmail.fm> wrote: > >> >> On Tue, Apr 30, 2013, at 02:14 PM, Stephen Dubovsky wrote: >> >>> SCR dc drives? Is this the 70's? >>> >>> LOL. Im kidding. But only partially:) >>> >>> SMD >>> >> For anything more than a few HP, SCRs still rule the DC drive world. >> >> I guess the toy stuff, under 1HP, is all PWM based these days. >> Small but not toys, say 1 to 5 HP, is probably a mix. But I bet there >> aren't many PWM DC drives above 5HP. >> >> My perspective is skewed somewhat, since the company I work >> for makes industrial DC drives, from about 20HP up. We don't >> mess with the tiny stuff. We recently shipped a 3000HP DC >> drive for use in a steel mill. >> >> >> -- >> John Kasunich >> jmkasun...@fastmail.fm >> >> >> > ------------------------------------------------------------------------------ > >> Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET >> Get 100% visibility into your production application - at no cost. >> Code-level diagnostics for performance bottlenecks with<2% overhead >> Download for free and get started troubleshooting in minutes. >> http://p.sf.net/sfu/appdyn_d2d_ap1 >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> > ------------------------------------------------------------------------------ > Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET > Get 100% visibility into your production application - at no cost. > Code-level diagnostics for performance bottlenecks with<2% overhead > Download for free and get started troubleshooting in minutes. > http://p.sf.net/sfu/appdyn_d2d_ap1 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. Code-level diagnostics for performance bottlenecks with <2% overhead Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap1 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
