The first one took ages to finish! But once you are done with winding it is getting quite easy and relaxing. The first route leads to your wifes cosmetics cabinet. Take a needle and apply some drops of it to your new windings:. This will add some fixation that can be easily removed when needed.
Now twist all three wire endings, cut them and solder them together. Use a lot of heat to burn away the coating. Double check for a good connection by using a multimeter between the soldered star point and all three open wires. Add two very thin heat shrinks to the outer two phase wires and cover all three wires with a combined heat shrink and use some nail finish to glue it in place.
Add another thin heat shrink to the star connection as well. You just rewound your first brushless motor. You can now hook it up to a motor test stand or use other ways to verify the KV rating and proceed with the next three motors….
Hi fishpepper, thank you very much for this tutorial. Could you please explain this in more detail? MfG HoNau. Usually you will use a star termination like shown in that picture. This connection is not connected anywhere externally, just add a heat shrink over the solder joint. The other three wires are the motor phases and those go to your ESC. So the wire will be thinker? How hot it gets depends on a variety of factors mechanical load, power input etc.
Nice write up. My first and only time I rewound a brushless motor was for the tail motor of a micro Heli. Kept miscounting, getting distracted by family, etc. Took me many days before success. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. By using this form you agree with the storage and handling of your data by this website. Notify me of follow-up comments by email. Notify me of new posts by email.
The basics Before starting with the tutorial I want to give a short overview on the parts of an outrunner brushless motor. The following picture shows the main components I am going to talk about in this post: During motor operation the axis of the rotor, shown on the left, is held in place by a c-clip, lock screw or a similar fastener. Unwinding Most likely you will start with a motor that is already wound and you will apply the same winding scheme.
Yes, you said that in the video, I mean how much lower kv? Is there a formula, or multiplier? Supposing we keep the number of turns and everything. What is the smallest motors you have rewound?
What is the thinnest wire you have worked with? Supposing we keep the number of turns and everything on RC group. There is a spread sheet to calculate kv with different pattern and termination. Dronenut Forum Beginner. Nice video. I don't need to wind anything at the moment but I've never seen brush less motor windings explained before. View a Printable Version Subscribe to this thread.
I used Black Rubber Paint. Ok, now to rewind. First, you must choose the number of turns you want. My motor was 8 turns, and I liked it, so I'm going to rewind it with 8 as well. Here 8 Turns means, 8 strands of enamel coted copper wire are connected in parallel which is wound on stator pole 8 times. Rule of Thumb - fewer turns is a hotter motor and will yield a higher kV and current draw. Go too low on this, however, and the motor may not run as the speed control may not detect the motor's position.
You'll also have to choose whether you want a Delta or WYE termination. Now you need the winding pattern. This motor is a 9N6P 9 stator pole, 6 magnet. This winding pattern will not work with the very common 12N14P motor. So before you start winding, count your magnets and stator poles and determine the winding pattern from the list below. Lower case letters indicate winding that tooth in the reverse direction. N denotes number of stator "wire wound" poles, P denotes number of rotor "permanent magnet" poles.
Noted commonly for its smooth and quiet operation. Other configurations: 9N, 8P - Magnetically imbalanced motor configuration occasionally found in high speed applications.
This configuration is best terminated as WYE to minimize vibration. This configuration is usually only built by do it yourself motor builders. This motor is best terminated WYE. It has been overshadowed by the 12N, 14P. Occasionally found in helicopter motors.
As we are planning on terminating Wye, mark the ending terminal of the wire. We'll need to join the ending terminals of all three phases when it comes time to terminate the motor as shown in following. It has extra insulation to prevent shorts. I chose three strands of 36 gauge wire. So it will be an 8 turn of 8 wire bundle wind. Start winding with any pole you like. Go only in one direction I went clockwise. Once you complete the number of turns you decided on earlier, skip two poles and continue winding the next.
Repeat this process until one third of the poles are wired. It should look like the picture below when you are done. Now before you begin with your next set of armatures, check for stator shorts with an ohm meter multi tester. The resistance between the wire and the metal of the stator should be infinite i. If you don't get a short, good job. Move on to the next set of armatures. Comment Policy. This site uses Akismet to reduce spam. Learn how your comment data is processed.
By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. Learn more. Delta is the other termination scheme. Report comment. Probably more worth doing on larger, more expensive motors.
0コメント