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The “Auto Restart” function of a DC fan allows the fan to automatically resume operation after a power interruption or when certain abnormal conditions are resolved. This feature ensures the uninterrupted operation of the fan without the need for manual intervention, enhancing the reliability and convenience of the equipment it serves.

When a power failure occurs, the fan stops rotating. The auto restart circuitry inside the fan detects the power loss and continuously monitors the power status. Once the power is restored, the circuitry transmits a signal to the fan’s motor to initiate its operation again. In some cases, if the fan encounters problems like overheating or abnormal load that cause it to stop, the auto restart function may also be activated. The fan will attempt to restart after a certain period or when the conditions return to normal, depending on the specific design of the fan.

The FG (Frequency Generator) function of a DC fan is a vital feature that offers real – time information about the fan’s rotational speed. It produces a frequency output signal that is directly proportional to the actual rotational speed of the fan. By measuring this frequency signal, users can accurately monitor the fan’s operating state and ensure it functions within the expected range. This function is of great significance in applications where precise control and monitoring of the fan’s performance are essential.

There is a built – in FG circuit inside the DC fan. As the fan rotates, the FG circuit uses a sensor, like a Hall – effect sensor, to detect the movement of the fan blades. For every full rotation of the fan blades, the FG circuit generates a fixed number of electrical pulses. The frequency of these pulses is directly related to the fan’s rotational speed. A higher rotational speed leads to a higher frequency of the output signal, and a lower rotational speed results in a lower frequency. The generated frequency signal can be easily measured and processed by external control systems or monitoring devices.

The RD (Rotation Detection) function of a DC fan is dedicated to detecting the rotation status of the fan. It gives clear information about whether the fan is rotating smoothly or has come to a halt. This function plays a crucial role in guaranteeing the proper operation of the cooling system and preventing potential damage to the equipment caused by fan malfunctions. By constantly monitoring the rotation of the fan, the RD function can promptly identify any abnormalities and facilitate the implementation of appropriate countermeasures.

The RD function commonly employs sensors, such as Hall – effect sensors or optical sensors. A Hall – effect sensor works by detecting the magnetic field variations generated by the rotation of the fan’s rotor. As the rotor spins, the magnetic field lines passing through the sensor change, prompting the sensor to generate corresponding electrical signals. These signals are then processed by the fan’s control circuit to determine the fan’s rotation status. In the case of an optical sensor, it operates by detecting the interruption or reflection of light triggered by the rotation of the fan blades. The control circuit analyzes the received light signals to ascertain whether the fan is in rotation.

Our company’s DC fans have an IP54 rating.

The IP (Ingress Protection) rating of our company’s DC fans is a standardized system. It precisely defines the fans’ ability to resist the intrusion of solid particles and liquids. This rating provides crucial information regarding the fans’ protection levels against dust, dirt, water splashes, and other external contaminants. With an IP54 rating, our DC fans are well – equipped to handle a certain degree of environmental challenges. It helps our customers select the most suitable fans for their specific application scenarios, ensuring reliable operation and long – term stable performance.

The IP rating is composed of two digits. The first digit indicates the level of protection against solid particle ingress, ranging from 0 (no protection) to 6 (complete protection against dust ingress). In the case of our IP54 fans, the “5” as the first digit means that the fans are effectively protected against the ingress of dust in quantities that could interfere with normal operation. The second digit represents the level of protection against liquid ingress, ranging from 0 (no protection) to 8 (protected against long – term immersion in water under specific conditions). The “4” in our IP54 rating shows that the fans can withstand water splashes from any direction, providing reliable protection in environments with occasional water splashing.