With the rise of the weather temperature, the sales of various small fans have also skyrocketed. The small fans drive the fan blades through the high-speed rotation of the motor, so that the air generates convection and generates air volume. For small fan manufacturers, it is very important to choose a fan motor. . So what aspects need to be paid attention to when choosing a mini fan motor?
1. Noise
The micro-motor will generate a certain amount of noise when running at high speed. If the noise is too high, it will seriously affect the user experience. For the mini fan motor, the noise should not be higher than 60dB. In addition to the motor noise, the "eccentricity" of the fan blades is also the main reason for the noise.
2. Wind
The size of the air volume of the mini fan is determined by two factors, the power of the micro motor and the number of fan blades. At present, most of the common mini fans have 3~5 blades, and most of them are odd, because the odd number of blades will damage Resonance conditions can reduce noise, and the more fan blades, the greater the air volume. Of course, the larger the fan blade size, the greater the air volume. It can be concluded that the greater the power of the micro-motor, the greater the air volume; the larger the fan blade size, the greater the number of fan blades, and the greater the air volume.
According to the above two requirements, you can choose a suitable fan motor. At present, the common mini fans on the market can be divided into bladeless fans and ordinary hand-held fans. Like ordinary fans with exposed fan blades, carbon brush 300 can be used. Series, 180 series, has the characteristics of low price and high speed, and can be used for various mini fans, hand-held fans, etc. The bladeless small fans commonly use 020 series and 370 series carbon brush micromotors, which have the advantages of long life and low noise.
In addition to the carbon brush motor, some of the more expensive small fans use a brushless DC motor. The brushless DC motor has less noise and a longer service life than the carbon brush motor, but the cost is high, generally about twice that of the carbon brush motor. , so there are many mini fans using carbon brush motors on the market.
