With the continuous development of the electronics industry, many electronic products are used more and more widely, and the demand is also increasing. The demand for accessories required by electronic products is also increasing, such as: DC cooling fans, so what are the advantages of DC cooling fans that are worthy of businessmen's favor and pursuit?
1. The cost of the inverter is low and the capacity of the inverter is low
The current when the inverter continues to run, the rating says the peak value of the square wave, induction motors need sine wave current, DC motors need square 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 a sufficient difference between the DC voltage of the inverter and the induced electromotive force of the motor. In this case, if the peak currents of the DC motor and the induction motor are 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 higher output power than the induction motor. 33% brushless DC motor.
2. High power factor
Its power factor is much higher than that of the induction motor, because the excitation field of the DC motor does not require the reactive current of the grid. DC motors can operate at a power factor of 1, which is extremely beneficial 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 loads.
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 a synchronous operation mode because the permanent magnet excitation is used. The frequency loss of the rotor core of the induction motor is eliminated. These two aspects make the operating efficiency of the permanent magnet DC motor much higher than that of the induction motor, and the efficiency improvement of the small-capacity motor is more obvious.
4. Good speed regulation performance and simple control
The speed control of the DC fan is not only simple, but also has better speed control performance than the frequency conversion speed control of the induction motor.
These advantages and characteristics of the DC cooling fan can make it well used in the electronic industry and mechanical equipment, and it is also widely used because of its small size and convenience. In the future, with the rapid development of electronic products, cooling fans will definitely gain more dominance and become an indispensable part of electronic products.
