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What are the special features of DC cooling fans that can be customized?

σīu | 2024-11-25

With the increasing demand of customers for environmental protection, energy conservation, and intelligence of products, there are more and more requirements for customized functions of DC cooling fans. Let's take a look at the special functions of cooling fans that can be customized together.

1. Self start function: When the cooling fan is locked and cannot run, its working current will be automatically cut off. The cooling fan runs at a low current state to protect it from burning out due to high current. At regular intervals, the cooling fan will automatically output a signal to start the fan. When the fan is not in the locked state, it will be restarted and run normally.

2. PWM speed control function: The PWM function can use frequency and high/low voltage levels to control the speed of the cooling fan. The fan speed can be linearly controlled by adjusting the "duty cycle", which can achieve energy-saving and noise reduction effects.

3. FG speed measurement function: The main function of this function is to output a square wave signal from inside the fan, and the frequency of the signal represents the speed of the fan. That is to say, by reading the FG signal, the speed of the cooling fan can be read.

4. RD alarm function: This is an open collector function, which is the same hardware function as the FG mentioned above. When the cooling fan is running, the signal pin outputs a low level, and when the rotor is blocked, it outputs a high level. By monitoring the high and low levels of the RD signal, it can determine whether the cooling fan is in normal operation or locked state.

5. Temperature control function: When this function is applied, the speed of the cooling fan is controlled by temperature, and different temperatures can correspond to different speeds. It monitors the ambient temperature of the fan operation through a thermistor, and adjusts the speed of the cooling fan appropriately according to the temperature, achieving the goal of energy saving and noise reduction.

6. Waterproof function: The waterproof and dustproof level of the cooling fan can be customized according to user needs. The highest waterproof rating is IP68.

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