HV motor question
 

how many poles are novaks Hv motors?

Good question. I'm sure they are 2 poles mainly because of the way the magnet is. If it had more the 2 poles it would look something like a Aveox and Neu.

Good thing you started this thread because I have a question for the Novak guys as well.

What would be the Kv of a HV 1.5 and 2.5?

Reason for the question is, I'll be soon having a 200A ESC coming and I plan on using the above mentioned HV to try and set a 2S lipo speed record.

thanks Lutach

i have a spair hv 4400 that i want to put into an e-max for a freind, i have a bk that i wanted to use on it if i could

Do the math. If the 4.5 is 5000 kv a 2.5 would theoretically be 4.5/2.5 x 5000 = 9000kv and a 1.5 would be 4.5/1.5 x 5000 = 15000 kv, but in reality, I would guess more like 8000 and 12000 since it would be hard to fit all that wire in the stator with less turns to work with.

You might be right, but I was hoping the Novak guys would give their answer. I'm actually going to send it to a guy to have it done and I'm going to get a 200A ESC soon to try it out. It should be fun :lol:.

I can check with the engineers, but I'm not sure we have ever been interested in those low wind HV motors. So, no reason to wind, test and measure 1.5s or 2.5s.

Like I have said, I don't have the qualifications to answer tech questions. Speedy's Kv estimates are probably as good as any others. I'll check on the number of poles.

If you are putting an HV 4400 in a "new" E-Maxx, you need to install the 5mm shaft rotor.

Our motors are 3 pole motors.

How exactly does that work? The poles have to be even numbers. You only have north/south in multiples of 2 for a magnet. So for every north you have to have a south and vise versa. IE: a four pole motor goes north/south/north/south

If a motor were three pole it would go north/south/north and would stop turning after the second north. Are you sure you are not confusing poles with phases?

New technology apparently. :wink:

I believe he meant that Novaks have 3 slot "stators" and 2 pole magnets.

Wow. 3 pole. Incredible. You probably meant 3 phase 2 pole. Your magnet design can only support 2 pole (2 poles are N-S and 4 poles uses 4 magnets N-S-N-S). If your rotor was 4 pole than it would look like a Aveox, Neu, Plettenberg and Medusa and your motor would have more stators to make it work properly. This is just an awesome answer from someone who works at Novak. Please have Bob or someone else provide the correct answer.

You guys are brutal.:rofl:

Brutal was the guys when I first posted about my ESCs without any pictures. Man they didn't let a poor guy like me get away with it :lol:. NovakTwo knows we mean well :angel:.

Lutach, you knew pictures are a minimum requirement, yet you posted anyway. NovakTwo is probably a PR/marketing guy without the techy knowledge that some of us ask about. Who besides us would care how many poles it has? And who besides us would be able to explain why 3 is not the correct answer? Just try asking that at the T forums. :wink:

Brian, you kicked my butt on that thread :lol:. That a awesome btw with the pictures :rofl:. NovakTwo knows we are here to help and cause trouble at the same time :wink:. Hey balme lincpimp for this :intello:.

Don't shoot the messenger!:wink:

After serious conferencing (ahem), I have learned that I "mis-typed".

Our motors are actually 2 pole, 3 slots.

As those of you who "know things" have already pointed out....:smile:

So true, so true.....

That's ok, for that mistake, you just get 10 lashings with 30' of 12GA noodle wire (red so the blood doesn't show as much). :lol:

Alright :party:. NovakTwo, if I send you my burnt HV4.5 motor, can you ask your motor winder guy to make it a 1.5T? I have a 200A ESC coming soon and I want to use your motor to set a speed record for 2S lipos. I really don't want to send my motor to France to get it done.

thanks novaktwo, i guess we all learned something today

Especially me....:wink:

NovakTwo,

Did you ask Bob if I could send my busted HV4.5 to get it rewound to 1.5T so I can do the Speed Runs on 2S lipos? If I get a record, I'll give Novak the credit for providing the HV motor.

We have made special motors for speed runs before. But we can't rewind your existing motor or swap it for a special wind HV. The special would be $100 plus shipping---@ same price as our other HV motors.

Bob is checking to see what we could do. I'll let you know. What esc are you planning to use?
-------

Bob said we could do 2.5 or 3.5 to be used with 2s lipos, only, and no warranty. Why not just use a Nue motor for a SL controller?

Yes, I learned that apparently everything that goes wrong on this forum is my fault:oh:

I guess someone has to be the scapegoat when Mike or Serum start pointing fingers. Everyone will just say that it was me, and since Mike and Serum are NOT dumb they will agree... Sucks for me:tongue:

Please let me know, I'll be more than glad to pay the $80, but some sort of sponsorship will work for me too, specially if I put another Novak motor on the record books :party:.

I edited my post above with Bob's comments and the HV motor price.

Why, what happened? I would still be interested though.

I originally quoted the Velocity/SS Pro price, not the HV.

Winding special motors requires a lot of hand-holding and testing.

I can send you my HV and you can do all of that with it. How does that sound?

Hu to france, I'm french so that make me curious. I know there is number of compagny doing rewinding motor but that for industrial stuff.

Or maybe you plan to send it to that guy (Team Petit'yo) that make custom BL motor out of stock motors ?

If I could do it in the US then shipping wouldn't be so much. That's why I said that. Yes, I was and might send the motor to Team Petit'yo only if Novak won't do it.

I know it cost me around 35 $ to send my dead MMM to castle creation (0.5 Kg ...)


A PDF of one of there custom motor

http://www.petitrc.com/2007/articles...eam_ptityo.pdf

http://www.teamptityo.com/index.php?...pose&Itemid=32

There is some good video check out car number how much it out accelerate other cars

We wouldn't need your motor, we would just start from scratch and wind a new stator to order. If you want to return your existing motor, we can replace/exchange it according to our service options program.

Ok, but I need to be 100% sure Novak can do the HV1.5 and if Novak can, what do I need to do to send my motor back? Do I need to send a special note saying, "Crazy guy wants a HV1.5 for a crazy job".

Edit: Would 0.5 a turn be possible? What would be the Kv for it? Can the rotor be wrapped in Kevlar to withstand the high RPMs?

We can't do a 1.5T motor. It would probably require a wire gauge that we do not stock. We could do a 2.5T.

You can PM me your contact information, and CC number (which will not be billed until we ship.) Once we have this info, I can create an order for your motor. I'll check with Steve to see @ how long it would take.

Unless you also want to exchange your HV motor for one of our standard RMF HV winds, you do not need to send it back.

Hmmm this is interesting. So what KV would the 2.5T be?

We can only check the kv after we do the wind. The HV rotor is sintered---the same high temperature, rare earth materials we use in our tuning rotors. Wrapping the rotors in Kevlar and epoxy-coating them is a time-consuming mess--so no wrapping.

Steve said it would take a week, or so.

As soon as we build Lutach's motor, we'll let you know.....:yes:

I'll be using a 200A ESC that's custom made for this record attempt. I would love to have a 1.5T, but if that won't be possible I guess the 2.5T will do. What is your e-mail address NovakTwo?

Sounds good. If the 1.5T can be done as well, I'll take one too. Let me know if Bob can do a special price for me as he'll be credited for any records that will follow. If not, I will not be giving credits away. As of now there are only a couple of companies that will be getting credit and Kong Power will be one of them for providing me with their 2S 5000mAh 25C lipos.