Hance wrote:SecretSquirrel wrote:Hance wrote:I just got done rewinding a motor for a micro pylon racer that was a fun project. I wanted a much higher KV than you can buy so I just rolled my own as it were.
That's a pretty nice looking re-wind. How hard was it? I have a motor that I burned out in the hot Texas summer. I've considered re-winding it, but I'm yet to undertake the project.
It depends on the wind and the termination. This one was pretty simple. Others are a bit complex and require a bit more time. I spent maybe 30 minutes on that motor between the tear down, winding new wire on, and terminating the new windings. I wanted a really high KV motor for this project so there is only 7 turns of wire per pole. Stock that motor was 1500kv and the way its wound now it should be close to 4500kv. The number of turns per pole along with how the wires are terminated determines the KV of the motor. Low KV motors generally use more turns of wire than high KV motors do. Low kv motors use more turns of smaller more fragile wire. For high KV motors just the opposite is true. Difficulty wise high KV versus low KV is about a tie in my opinion. The heavy wire on a high KV motor is harder to get to lay in nice and tight. On low KV motors the wire is easy to work with but the insulation is more fragile so you have to be more careful with it.
See if you can find a local industrial motor rewinding shop. If you can find one drop by with motor in hand and show it to the guys at the shop odds are they will give you enough wire to rewind it and at most its going to cost you a couple of bucks for wire. Radio Shack sells magnet wire STAY WAY AWAY FROM IT. The radio shack wire has crap insulation on it and its dang near impossible to wind a motor with out shorts. Dan over at http://www.gobrushless.com has everything you need also.
For very high KV motors, you can use multiple strands per turn to avoid the problems of bending it. It can be hard to keep them all straight, but it definitely helps.