#2
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It's spiraled. I've had it in a motor that CreativeSN (Tim) made for me a long time ago.
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#3
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Thanks! So, I'm guessing this in a 50t 30AWG pattern wound motor with neo mags and a ball bearing can would rock a stage 2 and still be FET safe?
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#6
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Yea, thats safe. I believe it's nothing under 43t is safe. Someone correct me on that, I'm a little off.
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#7
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A gen1 could handle 43T with Iso magnets if you weren't running highspeed gearing. I ran like a 10T gear with liths, good for near 25mph on the street but it killed the stock FETs in short order. A single stack of aftermarket ones was all it needed. But with shorter gearing, and batteries you'd be plenty safe.
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You know what I'm gonna do? I'm gonna get myself a 1967 Cadillac Eldorado convertible, hot pink, with whale
skin hubcaps and all leather cow interior and big brown baby seal eyes for headlights. Yeah! And I'm gonna drive around in that baby at 115 miles an hour, getting 1 mile per gallon. I may be king of the idiots, but my kingdom is vast and my subjects are everywhere |
#8
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I don't think that is it...: I read it reduces electromagnetic permeability, thus reducing friction and allowing higher speeds.
I understand that the stacks are closer together resulting in a more consistent spin because there is less of a gap in between each armature pole. If you look at a straight-stack armature, there is a greater gap between each pole vs. this Auldey armature. I know this from hand winding on these exact armatures and the results I have tested on 1.25v and 6v make me think that spiral armatures do have less "lag" then regular armatures found in radioshack xmod motors. (also in most aftermarket motors made by large part companies) |
#10
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Quote:
Cheers, Kyle.
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#11
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The evo can handle a 38t motor with stock fets, but 8/25 gearing, ball bearings and bb can, no Neo mags either, are recommended to keep the resistance to a minimum and less stress on the motor. The gen1 i believe is 43t. The new streets should be the same as the evo...
This topic about how many turns can this esc/car handle? has been covered many times. the search button is one of the best inventions for the internet . I believe that is a spiral slotted i have 2 of them and 2 normal spirals, they look just like that one. |
#12
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the spiral/slotted arm also let's the motor run cooler.
the spiral acts as a corkskrew pulling air through the end bell and the slots allow more cooling since there's less mass to hold heat.
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#13
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Quote:
Quote:
Quote:
Also, the lower magnetic strength reduces back-voltage, not friction. Sorry about that.
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Über Newb to the rescue! Last edited by Pwnzor1130; 04-23-2009 at 07:33 PM.. |
#14
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Technically known as "counter EMF" which is quite destructive to electric motors at high voltage levels/RPM.
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#15
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Quote:
Cheers, Kyle.
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#16
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Well, I would think it wouldn't be THAT bad in such a small motor. No where near destructive. Maybe in a super super crazy high turn high-scale brushless motor....
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Über Newb to the rescue! Last edited by Pwnzor1130; 04-27-2009 at 09:59 AM.. Reason: woops wrong word |
#17
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it's pretty destructive.
30k rpm and 7.2 volts at like 5 amps? destructive. counter EMF is also called back EMF. it's a product of the generator effect that a coil has in a magnetic feild. it's an AC charge. back EMF also limits the motors top-speed. there's more back EMF in lower rpm motors, resulting in a slower spinning motor, but in both high-speed and low-speed motors at their topspeed, the back EMF equals the energy that is put into making it spin. this is called equilibrium. the net acceleration is zero since the back EMF has countered all of the force that is used to accelerate. back EMF increases in proportion to rotor speed. the spiral arm reduces back EMF by producing a weaker magnetic feild, allowing a higher speed before reaching equilibrium. if not for back EMF, then a stage 1 motor could reach an infinite amount of RPM at any voltage
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