Plastic Bonded Iron Powder Motors Can Halve the Cost and Double the Output of Electri

[zeropointbug]

http://www.greencarcongress.com/2007...c-bonded-.html

Looks like another new jump for electric motors. This, combined with the Raser Tech could make for a very potent combination.

[Getter Robo]

I wonder how this would work in brushless inrunners and how resistant they are against rotational force...

[BrianG]

Hmm, interesting read. But, there is a quote (below) pulled from that page that is a little confusing to me:

The technique is not suitable for high-performance motors, such as servo motors. But for fans, pumps, household appliances, and cars it’s a perfect fit. The technology can pave the way for new possibilities, such as facilitating the conversion of cars to electric hybrid power. It’s worth mentioning in this connection that all methods that lead to simpler and cheaper production indirectly help curb carbon dioxide emissions.

—Mats Alaküla

Wouldn't car motors (or our BL motors) be considered high-performance?

[zeropointbug]

Yeah, no kidding. It didn't make any sense to me either... but hopefully it can be advantageous for PM motors. But it will most likely be a while before it trickles down into R/C market. Unless one of the BL motor makers jump into it right away.

[nativepaul]

maybe they meant there suiatable for use in the battery/motor/ESC/air con fans that facilitate EV use.

[t-maxxracer32]

i cant click on the link... my comp is being stupid..

but how efficient would these be compared to bl motors?

[JThiessen]

I'm not so sure about this. All plastics are temperature and pressure sensitive (at least in comparison with metalics). At some point, your motors will heat to a point where the plastic will begin to loose its "manufactured" shape. Second, the forces of rotation will also add to the creep effect. But on the other hand, technology won't advance until items like these are tried and used.

[zeropointbug]

Originally Posted by JThiessen

I'm not so sure about this. All plastics are temperature and pressure sensitive (at least in comparison with metalics). At some point, your motors will heat to a point where the plastic will begin to loose its "manufactured" shape. Second, the forces of rotation will also add to the creep effect. But on the other hand, technology won't advance until items like these are tried and used.

I am sure they have figured out a good compound for high temperature use, as there are many high temp plastics out there. This material would be used on the stator, the non moving part of the motor, there would be no rotational forces to be had.

But yeah, I agree, it has to be tried and used.

[Patrick]

That wouldn't be for permanent magnets would it? More for motors that use field coils.

[zeropointbug]

yeah, BL motors do have field coils, what do you think makes the rotor turn round and round?

[Patrick]

I meant the field coils for motors or alternators without permanent magnets.
Is for brushed motors or brushless, or both?
So for a brushless motor, instead of the stator being a bunch of wire, you'd have this molded thing? Would that mean it would work for a car alternator as well? (the stator and the field coil)

[zeropointbug]

Basically think eddy currents, if you get past this barrier, then it allows a good jump in continuous power output.

I think this will come in extremely useful in high frequency/high rpm motors such as the brushless motors we use.