Thanks! Nope, I've never been in the US, only saw Toronto, from the north American continent. I was lucky enough to have cartoons growing up, not dubbed in Romanian, and i was also very lucky to have great English tutors. The fact that you call them rambles cements the fact that I've got a problem :)
Hi! In the contactor, you say the shorted turns causes the sum of forces to never go below zero. Would this not cause the core to gradually magnetize (become a permanent magnet)? Is this even a problem for contactors? I think I've heard about issues with three-phase motors that get permanently magnetized if power supply is out of symmetry (like there's something wrong with one phase). Keep up the good work, by the way, great videos!
I'm not sure it would magnetize the core, they're usually made out of very "soft" magnetic materials, i.e. Materials which won't readily retain any magnetism. Indeed for 3 phase motors, if there's a phase imbalance, it will affect their behavior, but generally magnetization isn't such a massive issue, if I'm correct, solely because using a more magnetizable material would cause more losses in the motor in the first place. For a contractor it's even less of an issue, due to the fact that it would be great to have a bit of flux there in the first place. Springs in those things are pretty strong, in order to yank the contracts apart very quickly
Наука
This was worth the watch for the contactor alone; thank you for all the time you put into these.
Loved the university ramble! Cool swiss gear motor. Happy to be your therapist :>
Hehe, thanks! I appreciate your comment!
Amazing
Great video, sad about the students not getting the practical stuff...cheers.
It was nice junk. The tape drive motors looked good for a 3d scanner project or something.
Yeah, well i'mma give them to a friend who wants to make an universal volume knob with force feedback. Nice idea
@@GearAcquisitionSyndrome I like Junk. By the way. in case it appeared negative. Long live Junk
Your rambles are priceless! I'm curious where you learned English so well? Have you worked in the US?
Thanks! Nope, I've never been in the US, only saw Toronto, from the north American continent. I was lucky enough to have cartoons growing up, not dubbed in Romanian, and i was also very lucky to have great English tutors. The fact that you call them rambles cements the fact that I've got a problem :)
@@GearAcquisitionSyndrome It's not a problem as far as I'm concerned, keep it coming!
"sdyelano v sssr" just russian equivalent of "made in" we saw that a lot back in the day in pl, nice finds! [;
Yeeeee, exactly, i forgot how it went. My grandma spoke fluent Russian and she told me about this a decade or more ago
Hi! In the contactor, you say the shorted turns causes the sum of forces to never go below zero. Would this not cause the core to gradually magnetize (become a permanent magnet)? Is this even a problem for contactors? I think I've heard about issues with three-phase motors that get permanently magnetized if power supply is out of symmetry (like there's something wrong with one phase). Keep up the good work, by the way, great videos!
I'm not sure it would magnetize the core, they're usually made out of very "soft" magnetic materials, i.e. Materials which won't readily retain any magnetism. Indeed for 3 phase motors, if there's a phase imbalance, it will affect their behavior, but generally magnetization isn't such a massive issue, if I'm correct, solely because using a more magnetizable material would cause more losses in the motor in the first place. For a contractor it's even less of an issue, due to the fact that it would be great to have a bit of flux there in the first place. Springs in those things are pretty strong, in order to yank the contracts apart very quickly
Yes, I think I got things confused, but I remember now, DC component is a big issue in transformers, not motors. Thanks :)
@@konstantinsirotkin3430 you can brake an induction motor by running dc through it.
Most of those VFDs were made in Ukraine and I believe they continued to make them there into the late 1990s.
I'm pretty sure you're entirely correct!