Many friends are curious about the brushless motor, such as the relationship between its speed and the size of the wire diameter, some friends asked, in the end, the wire diameter is thicker, faster speed, or the wire diameter is thin, faster speed? With this question, Vacuz gives you an introduction, I hope it can help you!

Very often, the speed of brushless motor to determine the use of the situation, if the speed does not meet the requirements, it will lead to bad motor, the size of the general wire diameter is also determined by the speed, so brushless motor speed and the size of the wire diameter has what relationship?

Speaking of which, let’s take a look at the formula of brushless motor speed: n=(U-RI)/Ceφ, U is the armature voltage; R is the armature circuit resistance; I is the armature current; φ is the main flux of the motor air gap; Ce is a constant, related to the motor structure.

From this formula above, we can see that the three parameters R, φ and U mainly affect the speed of brushless motor, if we want to calculate the speed of brushless motor, we need to figure out the situation of these parameters. The specific relationship is as follows.

1, the thickness of the wire diameter affects the resistance of the coil, the greater the resistance, the smaller the speed; the number of turns affects the flux of the motor, increase or decrease the number of turns, the speed will change within a certain range.

2、Speed has nothing to do with the wire diameter and the number of turns. It is related to the number of designed poles of the motor, especially the number of wire slots and windings.

Generally speaking, the common ways to regulate the speed of brushless motor are: adjusting the armature resistance, adjusting the excitation current and adjusting the armature voltage. The speed of DC brushless motor is still closely related to the wire diameter. In order to keep the wire diameter in the right condition, we can control the speed to achieve it.

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