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Can a small axial flow fan be designed with a PWM intelligent speed control function?

by:TOCH     2021-03-26
We know that an axial fan of the size of a computer CPU can be designed with a PWM function, and adding this function will give you a more comfortable feeling. When the frequency is used for a long time, the speed of the axial fan will become higher. On the contrary, the speed will be automatic. Down, theoretically, the life of the axial flow fan will be extended. So, can a smaller axial flow fan also be designed with this function? At present, the axial flow fan above 3CM can be added with the PWM intelligent speed control function. Yes, there are generally three lines, red is the positive line, black is the negative line, and yellow (or blue) is the PWM control function line, such as a 30*30*7 axial fan, we call it 3007 for short, and upwards are 3010, 3510 , 4010 can be done, of course, currently below 3CM, such as 20*20*6mm, 15*15*4mm, because the motor is very small, the built-in PCB board cannot design the PWM circuit, and there is not enough space, so this design is not available for the time being. Miniature axial flow fans with 3 wires are mostly FG functions, that is, the speed monitoring function. In addition, for small axial flow fans, the actual usage is relatively small. The main reason is that adding this function will increase the cost accordingly. A temperature control circuit can be added to the product to control the output voltage of the product, and it can also achieve a speed regulation function similar to PWM, because the voltage to the axial fan is reduced, and the speed will be reduced accordingly. Welcome to the heat dissipation classroom and news center of the cooling fan manufacturer again. The copyright belongs to the cooling fan manufacturer and represents only personal opinions. Please do not reprint the whole article. Any violation will be held for legal responsibility. If you need to know more about the cooling fan manufacturer's product introduction, please Click on the product center
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