In our understanding, the same batch of cooling fans should be the same. Why are the same batch of cooling fans at different speeds?

 

When we are familiar with the speed test of the cooling fan, we will find that the speed is a dynamic and constantly changing parameter. This is because the resistance value of the motor changes slightly due to the influence of the environment, so the speed will always go back and forth in a small area. The beating.

 

The same batch of cooling fans, different individuals, the resistance of each cooling fan, the tightness of the structure, and the amount of oil. These subtle differences are caused by the variable value of the cooling fan made of the same parameter, but in a certain area For example, for cooling fans above 4CM, it is normal for the speed tolerance to be within 10% of the standard value.

 

Of course, we can use special design and circuit interference to keep the speed in a constant state.

 

Can you change the cooling fan for me? This is usually done according to the customer's requirements, but it is found that it is wrong. It is required to change the parameters and specifications. In fact, there is no way to change it

 

When the cooling fan is completed, it means that the wire diameter and number of turns of the motor are set, including the selection of the outer frame, which are one-to-one correspondence, and are matched. For example, if you want to change the speed, you have to rewind the motor, that is Re-do. For example, if the outer frame of the cooling fan needs to be replaced, the leaves have to be replaced. Even if the diameter of the motor is the same, the outer frame can no longer be used after disassembly and reinstallation. This is more troublesome than making a new one.