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Time：2022-03-04Views：0
The DC fan manufacturer Chengda Electronics will introduce the four characteristics of DC fans in detail. The DC fan is actually a fan that realizes the conversion of DC power to mechanical energy by inputting DC power to rotate the DC motor to drive the fan impeller to rotate. The biggest feature of the DC fan is the optional DC motor. The following are the four major characteristics of DC fans:
(1) Low loss and high efficiency: Because of the use of permanent magnet excitation, the loss caused by the excitation current of the induction motor is eliminated; at the same time, the permanent magnet brushless DC motor works in a synchronous operation mode, eliminating the frequency loss of the rotor core of the induction motor. These two aspects make the operating efficiency of the permanent magnet brushless DC motor much higher than that of the induction motor, and the efficiency improvement of the small-capacity motor is more obvious.
(2) High power factor: Since the excitation magnetic field of the brushless DC motor does not require the reactive current of the power grid, its power factor is much higher than that of the induction motor, and the brushless DC motor can operate at a power factor of 1, which is extremely important for low-power motors. favorable. Compared with induction motors, brushless motors not only have higher efficiency and power factor at rated loads, but also have advantages at light loads.
(3) Good speed regulation performance and simple control: Compared with the frequency conversion speed regulation of the induction motor, the speed regulation control of the brushless DC motor is not only simple, but also has better speed regulation performance.
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