Neo Magnets - Page 2

arch2b · #16 12-04-2003, 07:55 PM

i put my magnets in an a-bb motor which is slightly faster than an x-speed. i think the right mix is to put them in a very fast motor so that the drop in speed is not as noticeable so you get tons of torque and above average speed

neurokinetik · #17 12-05-2003, 01:22 AM

I still have my A-BB motor (well, all the pieces of it anyway, they are currently scattered among something like three different motors

) Honestly, I never found that motor to be that impressive. I didn't find it to be nearly as fast as the X-Speed I had. It is basically an X-Speed armature in the Auldey can though, isn't it? That's what it looks like to me. I couldn't understand why it seemed so slow, when it sounded so nice outside of the car.

If the right mix is to put them in a very fast motor, then the 25 turn armature should have been the right choice. It seems to be too extreme, though. All top-end and no torque at all. If the stage 2 motors were really turning 30000 rpm (I know, they really aren't) then this motor turns more like 40000-45000. It's that much faster.

neurokinetik · #18 12-06-2003, 01:06 AM

W000000t!

Just figured out something vitally important when using these Neo magnets!

I just tried them in my last remaining stock stage 2 motor. Same results as I had with the 25 turn motor. It wouldn't start unless I gave it some help.

I was about to try six cells on it to see if that would help, but I thought of something else first: Use the giant power cap that I bought, as it would be capable of storing the energy needed to start this torque monster up. Sure enough, it works! The motor has pretty instantaneous response now, though throttle response now is basically like an on/off switch. :lol:

Time to swap these babies back into the 25 turn motor and see how they do. If they work, it will be time to swap on the 11 tooth pinion and run the car.

Finally, some success!

(Side note... getting these things into a motor is easy. Getting back out really sucks...)

arch2b · #19 12-06-2003, 12:09 PM

hehe, i can verify that (difficulty getting them out)
i never thought to try a power cap.... i don't have a problem getting mine to move in the a-bb motor. i loose the intial crawl speed but that's not a real concern to me. the extreme power is what i really enjoy! i can push or pull anyother overland with it.

your right in that the overall range of speed (crawl to full speed) seems decreased but it makes up for it though.

TypeZer0 · #20 12-06-2003, 12:48 PM

is that the cap that goes parallel with the batteries that i've seen before? tried it once, saw no difference with the stock motor so i took i tback off. it's supposed to smooth out and lessen the voltage drop when you hit the throttle right?

neurokinetik · #21 12-06-2003, 01:58 PM

Quote:

Originally posted by TypeZer0
is that the cap that goes parallel with the batteries that i've seen before? tried it once, saw no difference with the stock motor so i took i tback off. it's supposed to smooth out and lessen the voltage drop when you hit the throttle right?

That is correct. In this case, it is a 10000μF 10V cap. Most people use 4700μF, so I figured I'd go one better. It stores enough energy that when I remove the batteries, the steering servo will still turn back and forth one time before going dead.

It is really a mod that is only necessary when you are running a motor with a very high current draw, like the one I am running, hence the reason it made no difference with the stock setup.

Quote:

Originally posted by arch2b
your right in that the overall range of speed (crawl to full speed) seems decreased but it makes up for it though.

It isn't just that, it's also that the motor stops almost instantly when you let off the throttle. You lose the ability to "coast" with this type of setup.

TypeZer0 · #22 12-06-2003, 02:19 PM

you wanan go one up some more? www.allelectronics.com has a 1 farad super capacitor that i believe is about the size of a 4700microfarad cap but wider like a stack of quarters.

arch2b · #23 12-06-2003, 03:50 PM

Quote:

Originally posted by neurokinetik
...It isn't just that, it's also that the motor stops almost instantly when you let off the throttle. You lose the ability to "coast" with this type of setup.

opps, i forgot to mention that didn't i

well, in the overlands, it acts as a great hill or descent brake...so it's nice actually. but your right, as soon as you let go of the gas...it comes to a screaching halt. i can't even get the rear wheels to move when i push it...

neurokinetik · #24 12-06-2003, 03:50 PM

Quote:

Originally posted by TypeZer0
you wanan go one up some more? www.allelectronics.com has a 1 farad super capacitor that i believe is about the size of a 4700microfarad cap but wider like a stack of quarters.

I thought about going that route, but I didn't, for three reasons:

1 - cost. Those kinds of caps tend to go for $5-10 or more.

2 - voltage capability. They normally are designed for 5V or less

3 - current capability. They are generally not designed to output lots of current like a normal electrolytic cap can do.

TypeZer0 · #25 12-06-2003, 04:25 PM

you're kinda right, http://www.allelectronics.com/cgi-bi...-12&type=store 5.5 volts rated and it goes for 3.75 plus 5 bucks shipping

http://www.allelectronics.com/cgi-bi...125&type=store 2.5 volts rating but only a buck each.

neurokinetik · #26 12-06-2003, 06:37 PM

Well, I tried the 25 turn motor in the car, and though it is much improved with the Neos, it is still a pretty wretched performer.

But... here's a killer combo...

Start with a stage 2 armature, remove 5 turns per pole. Advance the timing by cranking the commutator counterclockwise (when looking at the commutator end of the motor) about 15˚. Drop it into an Auldey BB can with Drac's Neo magnets.

I don't need to "kick start" this one like I did the others.

What I don't know is if the stock ESC will be able to handle this kind of abuse. :lol:

In the car, the acceleration is pretty decent, despite using the 11T gear set.
I don't have the space to top it out in my living room, but it seems to hit better speeds than my tweaked S2 drag, which can hit top speed in about 15 feet or less.

Draconious · #27 12-10-2003, 11:38 PM

Guess I will have to actualy try the capacitors on my Mini-Z (dont have an Xmod yet).. see if it helps, had some sitting here to use, but never had the guts to solder them on, and I am waiting for a new soldering iron in mail after trashing mine lol...

If any one realy wants to experiment... try one neo magnet, and one other magnet from a motor, and let me know if it still spins, if its faster/slower... (this is for those that are realy bored, and can test the voltage/amp draw of the motor before using it to make sure it dont fry the board). I did this to a larger motor once and I swear it spun like all hell... but motor was huge and heavy for me to use it in anything.. ive never got aroudn to testing it on a mini-z by the time I do it... well Im to lazy lol.

Draconious · #28 12-31-2003, 01:15 AM

Any more magnet useage updates?!

Still awaiting a new soldering iron to try capacitors

neurokinetik · #29 12-31-2003, 12:05 PM

The last combo I posted is still in use, though torque output pales in comparison to the 180 motors I'm using now. I may try dropping in a 35 turn arm into that can and compare it to the same setup in a Yeah Racing can with the thinner Neos.

Now, how about Neo magnets in a 180 motor? Yummy....

cdog4w · #30 01-25-2004, 04:47 AM

Anyone know how the neos from Draconious compare to the pnracing neos? I want to get a BB can, but mini-zracer.com is out of them and Drac doesn't sell them. I was hoping to do my shoping in one place so I was wondering how the PN BB can and PN neo mags match up?

(This would be to transplant a mini-x armature to maintain 4wd)

Thanks in advance.