The 12V DC fan is a common cooling fan in electronic devices, and its working principle is based on ampere's right hand rule. The fan contains rare earth permanent magnetic rods, and its speed and air volume are independent of voltage. In general, the starting voltage of a 12V DC fan depends on the minimum voltage and the trigger voltage of the output driver, whose minimum operating voltage is set to 80% of the rated voltage, and the maximum operating voltage can be controlled by the function, but will add additional power consumption. Different devices supply different voltages to the internal components of the device, so the DC fan can be adapted to the 12v power supply of the 3d printer or the 24v power supply of the cabinet. The difference between the same type of DC cooling fan 12v and 48v is that the voltage is different, the power and heat dissipation effect are different, the power of 12v will be one third of 48v, the need to meet the same heat dissipation effect, 12v needs three times the current than 48v to achieve the same power. The internal circuit board design of the DC fan and the number and model of the ics used are also different, and the function thresholds such as soft start, current limiting protection and speed regulation function parameters are also different. When purchasing, the voltage and heat dissipation volume should be selected according to the actual demand.
