Are you familiar with DC brushless fans? Do you know the basics of DC brushless fans? Let’s find out together with the editor below! Fan parameters: First is the fan size—this primarily refers to the physical dimensions of the fan, typically expressed as the outer length and product thickness, with the unit being millimeters (mm). Fan model names often use the size as part of their designation; for example, in “DC8025,” the “8025” indicates the specific size of the product.

Heat dissipation can be categorized into two types: passive cooling and active cooling. Among active cooling methods, depending on the specific cooling technique employed, we have air cooling, liquid cooling, water cooling, heat-pipe radiator cooling, semiconductor thermoelectric coolers, compressor-assisted cooling, and liquid-nitrogen cooling. The operating principle of a cooling fan is based on energy conversion—electrical energy → electromagnetic energy → mechanical energy → kinetic energy. The circuit designs used in cooling fans generally come in various forms, and the performance of the fan will differ accordingly depending on the circuit configuration. Meanwhile, cooling fans are widely used due to their high rotational speed, ease of installation, and excellent cooling efficiency. The cooling method employed by miniature cooling fans refers to...

When purchasing a fan, you should generally be aware of the following information: 1. The dimensions of the fan. 2. Determine whether the fan is DC or AC-powered. 3. The voltage rating of the fan’s power supply—for example: AC 220V, 110V, 380V; DC 5V, 12V, 24V, 36V, 48V. 4. The type of bearing used in the fan—ball bearings or oil-lubricated bearings. 5. The fan’s airflow rate and rotational speed—for example, how many cubic meters per minute, or how many cubic feet per minute. 6. The static pressure value of the fan. Second, regarding the bearings: Sliding Bearings In the conventional design of DC brushless fan motors, the fan blade rotor (referred to as the rotor) and its shaft pass through oil-lubricated bearings—or sleeve bearings—that are pivotally fixed at the center of the motor stator. This arrangement ensures an appropriate clearance between the rotor and the stator. Of course, there must be a gap between the shaft and the bearing to prevent the shaft from becoming jammed and unable to rotate. After power is applied, the stator structure (referred to as the stator) generates induced magnetic flux lines between the rotor and the stator, and the control circuit drives the fan motor to operate. Thus, the traditional fan motor design consists of only one fan blade rotor, one motor stator, and one drive circuit, all connected via a pivot joint between the shaft and the bearing, operating through magnetic induction. 1. Advantages of Oil-Lubricated Bearings: A. Better resistance to external shocks, resulting in less damage during transportation. B. Lower cost (the price difference compared to ball bearings is significant). 2. Disadvantages of Oil-Lubricated Bearings: A. During operation, dust in the air will be drawn into the motor’s iron core and mixed with the lubricating oil stored around the bearing, forming sludge. This increases operational noise and may even cause the fan to jam. B. The inner diameter of the bearing is prone to wear, leading to a shorter service life. C. Not suitable for use in portable products. D. The small clearance between the bearing and the shaft results in poor motor starting performance. E. During motor operation, the high-temperature gases generated by friction between the shaft and the bearing are blocked by oil seals and washers at both ends of the bearing, preventing their removal. This leads to the formation of nitrides, which tend to accumulate in the gap between the shaft and the bearing, hindering smooth motor operation.

The noise issue with cooling fans is a relatively common problem. Some of these issues stem from the quality of the cooling fans themselves, while others are related to improper installation. Therefore, proper installation of cooling fans is also extremely important. 1. The mounting method that involves clamping the cooling fan onto the bracket from above and below can easily lead to resonance and amplification of sound due to the vibrations generated during the fan’s operation. In contrast, high-speed cooling fans that operate without vibration can avoid this issue entirely.

DC cooling fans are both unfamiliar and familiar to us. They’re strange because of their name, yet they’ve become familiar precisely because we come into contact with them so often. Every time we disassemble old equipment or repair household appliances, we’re bound to encounter them. Next, the editor below will explain the causes of noise in DC cooling fans and offer solutions for dealing with it.

1. Voltage Regulation of DC Fan External Terminals: This type of speed regulation was widely used in the earliest speed-control schemes. The primary reason it enables speed adjustment is the broad voltage adaptability of DC fans. The voltage range is exceptionally wide—DC fans can operate normally at as low as 50% of their rated voltage—and the terminal voltage directly determines the fan speed. Consequently, most early speed-control methods were implemented in this manner. At the same time, this speed-regulation approach is simple and cost-effective. 2. Internal Logic Control Circuit for DC Fan Speed Regulation: A speed-control signal is added to the DC fan to achieve speed adjustment. The speed-control signal can be a PWM signal, a Vsp signal, or an adjustable signal.

DC cooling fans are widely used in various applications. Today, let’s talk about DC cooling fans. What should we pay attention to when using them in mining rooms? Our editor will guide you through it all! As a manufacturer familiar with cooling fans for mining machines, we know that the temperature in mining machine rooms—especially in sauna-like environments—can get extremely high. However, if the mining machine itself overheats, it can lead to malfunctions and even cause the machine to shut down unexpectedly. Ultimately, this will negatively affect the operation of the mining machine. Over time, such overheating can result in irreversible damage, significantly shortening the lifespan of the mining machine. Therefore, it’s crucial to ensure effective heat dissipation for mining machines. DC cooling fans are specifically designed to help dissipate the heat generated by mining machines.

1. Equipment Components Typically, cooling fans are assembled primarily from a rotor, stator, frame, motor (electric motor), and other small components. The quality of these equipment components directly determines whether the cooling fan can operate normally. Therefore, to improve the quality of cooling fans, it is essential first to master the specifications of these components. High-quality components can extend the service life of cooling fans and enhance their heat dissipation performance. 2. R&D Department Before production, cooling fans usually undergo meticulous design and rigorous testing by the R&D department to ensure that all aspects meet production requirements and market demands. For example, when designing internal structural components and the two...