China rc brushless motor supplier, some basic knowledge of brushless motor models use brushless KV values as low as 1-2 thousand, as high as 5-6 thousand, he said that every time the voltage increases by 1 volt, the speed increases For brushless, this value is a constant. For brushless of the same size: &With more turns, the KV value is low, the maximum output current is small, but the torque is large
The number of windings is small, the KV value is high, the highest output current is large, but the torque is small, the quality of the motor cannot be evaluated from the KV value, because different KV values have different applicable occasions: low voltage environment (7.4v) KV If the value is low, due to the low speed, it is suitable to be equipped with a smaller reduction ratio and a larger propeller, relying on a larger load to increase the current, and output a greater power; with a high KV value, due to the higher speed, it is suitable for a larger With the reduction ratio and smaller propeller, under the condition of meeting the output power, it is necessary to reduce the load to avoid excessive current; high voltage environment (11.1v) with low KV value can reach higher speed under this voltage environment, The torque is also good, ideal. It is necessary to cooperate with a larger reduction ratio and a smaller propeller. Under the condition of meeting the output power, reduce the load to avoid excessive current; if the KV value is high, the speed is too high in this environment, in order to avoid excessive current, To minimize the load. With its high speed, it is very suitable for ducted fan engines. 7.4v and 11.v are just examples and are commonly used small levels. The brushless voltage range is very wide and the performance is amazing.
