Factors Affecting the Speed of Axial Flow Fan

When purchasing axial fans, many customers must first consider the qualification of the cooling fan manufacturer, the quality of the product, the size of the product, and finally whether the product has the performance of heat dissipation. But what are the factors affecting the speed of axial flow fan?

Ⅰ. Rotation speed of axial flow fan

Regarding the speed of the axial fans, the difference between the super powerful type and the silent type is not too strict, and it is not very strict, but for computer fans of the same size and the same voltage, wind pressure and noise are two contradictions that cannot be reconciled.

The rotational speed of an axial fans refer to the number of times the fan blade rotates per minute, and the unit is rpm. The rotational speed of the axial fans is determined by the number of turns of the coil in the motor, the operating frequency, the total number of axial flow fan pages, the inclination angle, the aspect ratio, the diameter and the axial flow fan bearing system.

When the fan structure is fixed, the number of revolutions of the DC fan (that is, the fan that uses DC power) changes synchronously with the change of the operating frequency.

Ⅱ. How to measure the rotational speed of the axial flow fan

The rotational speed of the axial flow fan can be detected based on the internal rotational speed signal, and it can also be detected externally. External measurement is to use a dedicated red line speedometer to detect the rotational speed of the axial flow fan, and the internal measurement can be viewed in the BIOS immediately, or based on the software Look. The internal measurement has relatively large errors.

The rotational speed of the axial flow fan is not necessarily related to the heat dissipation capacity. A higher working speed will produce higher noise. When buying an axial flow fan, if the exhaust air volume is similar, you can choose a low-speed axial flow fan. It will be quieter when used.