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Time：2022-01-08Views：0
Usually, miniature cooling fans are used in many kinds of applications, which can do dust removal, heat dissipation, and extend the service life of equipment. Some customers will think of the application environment of the micro fan when they choose the micro cooling fan. When the temperature is low and no heat dissipation is needed, they hope that the fan will not work or the speed will be slower. At the same time, the target of heat dissipation is achieved and the power consumption is also reduced. Can the speed of the micro cooling fan be adjusted?
1. Ordinary micro cooling fan, if there is no special treatment, the temperature of the fan cannot be adjusted according to the ambient temperature, because the motor of the micro cooling fan is fixed, and the voltage is constant, the power of the fan, and the fan How high is the speed.
2. If the voltage of the micro cooling fan changes suddenly, the power of the fan can be changed, which will also affect the speed of the cooling fan. However, the voltage of the heat sink cannot be changed at will, and it can only be recuperated downward, because if the voltage is too high, it will cause too much current in the cooling fan, too much current in the driver IC, and rising temperature will cause the cooling fan to burn out.
3. A temperature control resistor is connected in series to the motor of the micro cooling fan. When the temperature changes, the temperature rises or falls, and the temperature control resistance also changes, causing the resistance of the micro fan motor connected in series to change explosively. The resistance of the micro cooling fan motor changes.
4. Micro cooling fan with PWM function. When the ambient temperature changes, the PWM mainboard will be affected by the temperature. By sending a light signal to the fan, the PWM duty cycle will be changed. The micro fan will change with the duty cycle. The size changes linearly.
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