What are the advantages of DC cooling fans in the electronics industry?
Release time:2021-11-09
With the continuous development of the electronics industry, many electronic products are widely used and demand is constantly increasing. The demand for accessories required for electronic products is also constantly increasing, such as DC cooling fans. What are the advantages of DC cooling fans that are worthy of merchants' favor and pursuit? Here, the manufacturer of DC cooling fans will briefly introduce the advantages of DC cooling fans.
Advantages of DC cooling fan manufacturers:
1. The inverter has low cost and small capacity
The manufacturer of the DC cooling fan stated that when the frequency converter continues to operate, the rated value refers to the peak value of the rectangular wave. Induction motors require sine wave current, while DC motors require rectangular wave current. The rated current of the inverter when it continues to operate generally refers to the effective value of this sine wave. In order to maintain the control capability of the inverter over 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, assuming that the peak currents 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 that of the induction motor.
2. High power factor
Due to the fact that the excitation magnetic field of DC motors does not require reactive current from the power grid, their power factor is much higher than that of induction motors. DC motors can operate with a power factor of 1, which is advantageous for low-power motors. Compared with induction motors, it not only has higher efficiency and power factor under rated load, but also has advantages under light load.
3. Low loss rate
Eliminating the losses caused by the excitation current of the induction motor, the permanent magnet DC motor operates in synchronous mode due to permanent magnet excitation. Eliminating the frequency conversion loss of the induction motor rotor iron core. These two aspects make the operating efficiency of permanent magnet DC motors much higher than induction, and the efficiency improvement of small capacity is more significant.
4. Good speed regulation performance and simple control.
The manufacturer of DC cooling fans stated that the speed control of DC fans is not only simple, but also has better speed performance compared to the variable frequency speed control of induction motors. The advantages and characteristics of DC cooling fans can make them widely used in the electronic industry and mechanical equipment, and due to their small size and ease of use, they are also widely used. Electronic commutation has always replaced traditional mechanical commutation, with reliable performance, no wear and tear, low failure rate, and a lifespan about 6 times longer than brushed motors, representing the development direction of electric motors.
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