Can the speed of the micro cooling fan be adjusted?
Release time:
2021-07-05
Now the usual micro cooling fan is used in many areas, doing dust removal, heat dissipation to extend the service life of the equipment. Some customers in the choice of micro cooling fan, will think about the use of micro fan environment, in the low temperature does not require heat dissipation, hope that the fan does not work, or the fan speed slower. It also reduces the loss of electric energy while reaching the purpose of heat dissipation. so micro cooling fan can regulate speed?
1. For ordinary micro-cooling fans, if there is no special disposal design, the fan cannot adjust the temperature according to the ambient temperature. Because the motor of the micro-cooling fan is fixed, only the voltage is unchanged, the power of the fan is the same, and the speed of the fan is How much.
2. If the voltage of the micro cooling fan is changed, the power of the fan can be changed, which will also affect the speed of the cooling fan. However, the voltage of the cooling fan cannot be changed at will and can only be adjusted downward. If the voltage is too high, the current of the cooling fan is too large, the current of the driving IC is too large, and the temperature rise leads to the burning of the cooling fan.
3. A temperature control resistor is connected in series inside the motor of the micro cooling fan. When the temperature change becomes higher or lower, the temperature control resistor will also be changed, so that the resistance value of the micro fan motor connected in series with it will change, thus changing the speed of the micro cooling fan.
4. For micro-cooling fans with PWM function, when the ambient temperature is changed, the motherboard with PWM ground will be affected by the temperature. After sending a message to the fan and changing the duty cycle of PWM, the micro-fan will change linearly with the size of the duty cycle.
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