Awright youse motor folks, I need info. I have, over the last couple years goofed around with BLDC motors made for RC hobbies. I even made a couple just to learn winding techniques. The motors are rated in part by the kv of the motor, which is how fast it will spin when powered at a given voltage. The kv stands for thousand revolutions per volt. A hand wound motor, or any motor for that matter, can be checked for its kv by spinning the motor at a known rpm and measuring the voltage it produces when operated as a generator. Anyway, I now have a practical use for a BLDC motor. But it needs to fit in a certain space and spin slowly. So I am going to wind a motor by hand on laminations that I will mill myself. I have looked online at sites all about these motors and nobody is trying to make a really slow motor. What I need to know is if the kv is really that important. Can't the motor be told to spin at whatever rpm by the motor controller? No matter what the voltage is (whithin reason)? The motors I would have a pretty high kv and the wire I use to wind them is pretty fine. I can use finer wire but only so fine because it will get too delicate for me to hand wind and because the current capability will drop too much. The motor I want needs to spin slow but have pretty good torque for its size. Higer torque means thicker wires to handle higher current but thicker wires also means fewer turns of the windings which means higher kv. Thanks, Eric
- posted
7 years ago