How to choose a small fan motor?

Various types of small fans can be seen everywhere in life. The small fan operates the fan blades according to the high-speed performance of its motor, and generates air movement through gas convection, so the selection of the fan micromotor is very important. So what should you pay special attention to when choosing a small fan motor?

1. Wind power: The wind speed of a small fan is determined by two factors, the output power of the micro motor and the number of fan blades. Because multiple vanes disrupt the resonance level, reducing noise. At the same time, the more blades, the higher the wind speed, and the larger the blade size, the higher the wind speed. It can be concluded that the higher the output power of the micro'motor, the higher the wind speed; the larger the blade size, the more the number of blades, the higher the wind speed.

2. Noise: The micro-motor will generate certain noise when it runs at high speed. If it is too large, it will affect the customer experience. Compared to a small fan motor, the noise should not exceed 60 decibels. In addition to motor noise, the "eccentricity" of the fan blades is also the main cause of noise.

You can choose a suitable fan motor according to the above two requirements. At present, the most common small fans on the market can be divided into bladeless electric fans and conventional hand-held small fans. For example, 300 series and 180 series carbon brushes can be used, which are characterized by low cost and high speed, and can be used for various miniature fans, hand-held fans, etc. 020 series and 370 series carbon brush micromotors are commonly used in small bladeless fans, which have the advantages of long service life and low noise.

In addition to carbon brush motors, some of the more expensive small fans use brushless DC motors. Brushless DC motors have less noise and longer service life than carbon brush motors, but are relatively expensive. It is usually about double that of a carbon brush motor. So there are many mini fans on the market that use carbon brush motors.