The electronics industry from time to time, many electronic products are more and more common, the demand is also increasing. The demand for accessories required by electronic products is also increasing from time to time. For example, DC cooling fans, what are the advantages of DC cooling fans that are worthy of favor and pursuit by merchants?
DC cooling fan advantages:
1. Low inverter 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 requires sine wave current, and the DC motor requires 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 it is assumed that the peak current of the DC motor and the induction motor are 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 that is 33% higher than the output power of the induction motor.
2. High power factor
Its power factor is much higher than that of the induction motor, because the excitation magnetic field of the DC motor does not require the reactive current of the grid. DC motors can operate at 1 power factor, 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. Small loss and high efficiency
The loss caused by the excitation current of the induction motor is eliminated, and the permanent magnet DC motor works in the synchronous operation mode, because of the permanent magnet excitation. Eliminates the loss of the rotor of the induction motor. 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 more obvious.
4. Good speed regulation 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 small and convenient and other reasons also make its application more common. In the future, with the rapid development of electronic products, cooling fans will certainly be able to gain more dominant positions and become an indispensable part of electronic products. Let's wait and see.