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Model Railroading > Rare Earth, Coreless Motors?Date: 01/25/15 16:59 Rare Earth, Coreless Motors? Author: wabash2800 Reportedly, they have more power and are used in high-end model train locomotives. But also, reportedly, sometimes they can be an issue with DCC, though Lok Sound Decoders are not affected.
I know a source for these motors used, at half price. (New can be $100 or more). Has anyone here had any experience with them? I am considering using one in a steam loco kit-bash for more power and wonder if it will be worth it. Victor A. Baird http://www.erstwhilepublications.com Date: 01/25/15 17:47 Re: Rare Earth, Coreless Motors? Author: gandydancer4 Could you tell us the source of the motors? Thank you.
Date: 01/25/15 17:49 Re: Rare Earth, Coreless Motors? Author: wabash2800 Gosh, I would like to <G> but if I do, perhaps there won't be one left for me?
Date: 01/26/15 08:56 Re: Rare Earth, Coreless Motors? Author: gandydancer4 WOW! What do you win if you die with the most toys? Nevermind. I'll just Google it.
Date: 01/26/15 11:47 Re: Rare Earth, Coreless Motors? Author: wabash2800 See your private email.
gandydancer4 Wrote: ------------------------------------------------------- > WOW! What do you win if you die with the most > toys? Nevermind. I'll just Google it. Date: 01/26/15 11:59 Re: Rare Earth, Coreless Motors? Author: rsanchez Ebay has a bunch and nowhere near $100 http://www.ebay.com/bhp/coreless-motor
Date: 01/26/15 14:32 Re: Rare Earth, Coreless Motors? Author: NDHolmes My personal take is that coreless motors are more trouble than they're worth with modern can motor technology.
They did have several notable advantages in the "old days": - Better slow speed starts on DC (newer multi-pole can motors are pretty good, and DCC and PWM mostly take care of the rest) - Less cogging (again, mostly taken care of by newer motors and controls) - More power in a smaller size (good for Z and smaller N models but above that, questionable benefit in my opinion.) They also have several large disadvantages: - Expensive as all heck - Can self-destruct if stalled due to lack of cooling over the windings - Don't react well to lower frequency PWMs because of very high motor constants - Back EMF doesn't work because the physics of the motor are different Just my personal opinion, but if I were you, I'd just go with a good quality can motor. Much fewer things to worry about with nearly the same performance. Date: 01/26/15 18:31 Re: Rare Earth, Coreless Motors? Author: gandydancer4 Thanks Guys! I always learn something here.
Date: 01/27/15 09:51 Re: Rare Earth, Coreless Motors? Author: EL-SD45-3632 wabash2800 Wrote:
------------------------------------------------------- > Reportedly, they have more power and are used in > high-end model train locomotives. But also, > reportedly, sometimes they can be an issue with > DCC, though Lok Sound Decoders are not affected. > > I know a source for these motors used, at half > price. (New can be $100 or more). Has anyone here > had any experience with them? I am considering > using one in a steam loco kit-bash for more power > and wonder if it will be worth it. > > Victor A. Baird > http://www.erstwhilepublications.com More power from a expensive motor will not make a locomotive pull more cars. No matter the type of motor the unit will slip when you have to many cars behind the lead coupler. Stick with a decent can motor. |