Need a Huge 63-74 Outrunner Rewound

[sikeston34m]

Hi Takedown,

I just got your PM then I noticed your thread. I think I'll just respond here.

You're right. I'm not really interested in rewinding motors for people. For me, I find it fairly difficult. It's not so hard to actually rewind an outrunner, provided that NO mistakes are made.

What I found to be one of the hardest things, is removing the stator from a motor that is already built. Some Manufacturers use Adhesives similiar to Loctite that require ALOT of heat before they even think about letting go. I baked one in the oven at 500 degrees before I could get the stator off. This melted all the wires together and removed most of the protective coating from the stator.

If you are interested in rewinding a few motors yourself, I do have detailed instructions and diagrams on either DLRK style that you want to go with. Both in Delta Termination and Wye Termination.

On what influences KV in a motor. The larger the Diameter of the stator and the longer the stator, both tend to produce a lower kv motor.

To compensate for this, fewer turns need to be used. This opens up room for more parrallel strands of winding wire to be used. Example: If you remove 10 strands at 20 turns then you can go back using the same Ga. wire for 10 turns using 20 strands.

The goal should be to get the stator poles as full as possible. This makes for a motor that is most efficient and results in cooler temps with less copper loss.

By rewinding, a motor can be changed to perform very different than it once did, BUT.........you also need to consider what you want it to be, then shoot for that.

In raising the kv, using fewer turns and more strands, the internal resistence of the winding is greatly reduced creating a larger load for the ESC to handle.

To achieve a 600kv rating with a 52/40 sized stator is going to be pretty hard. The end result will be beyond your battery's discharge capability and probably beyond your ESC's ability to deliver what it wants. That's a huge motor man.

A custom AXI 4130 using 6 strands of 22Ga. wire and 4 turns makes for a motor that is in the 500 - 550 kv range. This motor has the Wye termination.

The Wye termination makes 1.73 times the torque that a Delta wind does AND makes 1.73 times LESS KV. The amp draw is also 1.73 times LESS than a Delta Wind with the same amount of turns. The Wye also starts better and runs cooler in my opinion. With that being said, this is why I decided to create a 4 turn motor.

It is a hoss! The starting amperage is huge also. Toward the end of the charge, the ESC is getting on the LVC too soon because of the huge amperage (125 - 150amps!) it takes to start this bad boy directly driving the diffs. Consider all of this before you put alot of time into something that isn't going to work.

The 52/40 size stator it TOO big for what you're trying to do. (+ it will explode the diffs). I'm with Linc on this one. Choose something smaller. AXI does make GREAT quality. They use Neo magnets, which is very important when you put one outrunner up against another to compare.

Alot of companies don't use Neo Magnets. This cuts their performance and makes them run hotter.

In cooling this type of setup, think Aluminum for mounts and airflow. I like AXI also because they sell a bolt on fan for "extreme" applications.