Many engineers, when selecting cooling fans, focus first on airflow and RPM—yet overlook a capability that fundamentally determines system noise, power consumption, and service life: the speed control method. Early DC fans relied on voltage reduction for speed control: 12V dropped to 9V, then 7V, and RPM followed accordingly. This approach was simple in circuitry, […]
In thermal design for electronic devices, airflow management is much more than just the number of fans. It’s about systemic control of the internal pressure environment. Positive and Negative Pressure are two fundamental yet critical cooling modes. By driving airflow through different pressure differentials, they create distinct advantages in cooling efficiency, dust prevention, and noise
Abstract: In thermal management design, fan speed is often mistaken as a direct indicator of cooling performance. This article demystifies the essence of heat dissipation, clarifying the non-linear relationship between fan speed, airflow, static pressure, and system efficiency. It highlights the potential pitfalls and trade-offs of blindly pursuing high RPM, providing engineers and decision-makers with a
Higher RPM = Better Cooling？ — The Truth About Fan Speed vs. Thermal Performance Read More »
Axial fans have gradually replaced centrifugal fans and become the mainstream due to their advantages of large flow, small starting torque, and strong adaptability to changes in the air duct system. Air pulsation is the product of ubiquitous air separation and vortex development. Ⅰ. Reasons for fluid pulsation in axial flow fans For the axial
Vibration Caused by Airflow Pulsation in Axial Fans Read More »
I believe everyone is familiar with the DC cooling fans. It can be found in computers, water dispensers, refrigerators, air conditioners, air purifiers, cars, etc. It is a very popular cooling device in many industries. “Fan” is actually just a general term for many types of fans, so what are the specific classifications of cooling
Types and Functions of Cooling Fans Read More »
Cooling fans can be mainly divided into two categories: AC cooling fans and DC cooling fans. And it is mainly used in computer equipment, household appliances, vehicle equipment, mechanical equipment and other fields for ventilation and heat dissipation. Among them, AC cooling fans are mainly used in large equipment such as industrial machinery and medical
The Difference Between AC Fans and DC Fans Read More »
Background of the project Most densely packaged electronic enclosure systems use fans or drum fans for forced air cooling. Smaller chassis systems typically use axial cooling fans, where the airflow is perpendicular to the fan blades. However, larger chassis systems may require centrifugal drum fans to provide sufficient airflow at high static pressures. At the
How to choose the fan for the chassis system design? Read More »
