What is the general reason for the noise of the DC fan?

DC fans are noisy, which is a relatively common problem. For example, the DC fans in our commonly used computers, DC fans in projectors, switches, humidifiers, inverters, etc. are more or less What is the reason for this problem? The main reasons are as follows: 1. Bearing problems, the use of oil-bearing DC fans are prone to noise problems, especially in high-temperature environments and dusty environments, and noise is more likely to occur 2. Fan blades are not running smoothly 3. Electromagnetic noise In addition to the above three categories, it is a mechanical problem. If something hits the fan blade, it will also sound if the speed is too high. Welcome to visit the cooling class and news center of the cooling fan manufacturer again. The copyright belongs to the cooling fan manufacturer, and Only represent personal views, please do not reprint the whole article, violations will be held for legal responsibility, if you need to know more about the products of the cooling fan manufacturer, please click on the product center