With the continuous development of the electronics industry, many electronic products are more and more widely used, and the demand is also increasing. The demand for accessories required for electronic products is also increasing, such as: DC cooling fan, so what are the advantages of DC cooling fan worthy of merchants and sought after.
DC cooling fan advantages:
1. The inverter has low cost and low inverter capacity. The current when the inverter continues to run, the rated value refers to the peak value of the rectangular wave, the induction motor needs sine wave current, and the DC motor needs rectangular wave current. The current rating when the inverter continues to operate generally refers to the effective value of this sine wave. In order to maintain the ability of the inverter to control the motor current, there should be sufficient difference between the DC voltage of the inverter and the induced electromotive force of the motor. In this case, if the peak current of the DC motor and the induction motor is assumed to be equal, the power output of the former is 33% higher than that of the latter, that is, the same rectifier/inverter can drive a brushless DC motor 33% higher than the output power of the induction motor.
2, the power factor is high, the power factor is much higher than the induction motor, because the excitation magnetic field of the DC motor does not need the reactive current of the power grid. DC motors can run at a power factor of 1, which is extremely advantageous for low-power motors. Compared with induction motors, motors not only have higher efficiency and power factor at rated load, but also have advantages at light load.
3. The loss is small and the efficiency is high. The loss caused by the excitation current of the induction motor is eliminated. At the same time, the permanent magnet DC motor works in a synchronous operation mode because of the permanent magnet excitation. Eliminate the induction motor rotor core frequency loss. These two aspects make the operation efficiency of permanent magnet DC motor much higher than that of induction motor, and the efficiency of small capacity motor is improved more obviously.
4. Good speed performance and simple control. The speed control of DC fan is not only simple, but also has better speed control performance compared with the variable frequency speed control of induction motor.
These advantages and characteristics of DC cooling fan can be very good to make it applied to the electronic industry, mechanical equipment, because of its compact and convenient and other reasons also make it more widely used. With the rapid development of electronic products in the future, cooling fans will definitely gain more dominant positions and become an indispensable part of electronic products. Let us wait and see.