How the DC fan work?
DC cooling fan DC currents are used to provide power: DC cooling fans speate of two major components of the stator and rotor poles (winding or permanent magnet) on the stator and rotor winding energized, the rotor magnetic field (magnetic poles) is also formed, an angle between the stator and rotor pole, the mutual attraction of the stator and rotor magnetic field (N pole and S pole) of the motor rotation. change the seat of the brush, you can change the stator and rotor pole angle (Assuming that the direction of the stator magnetic pole is the angle between the starting side of the rotor pole on the other side by the magnetic poles of the rotor to the stator magnetic pole in the direction of motor rotation direction), so it’s changing the direction of rotation of the motor.
Speed & Electric current
Cooling fan Speed – That the fan blades to rotate in a unit of time the number of weeks, the unit is generally RPM, rev / min
Often Speed can affect wind speed, wind, air pressure, noise, power, and even life.
The higher the speed, the fan performance is stronger, the faster speed, the greater the amount of wind, air pressure greater; same time, high speed, friction, vibration, the more noise is large, bearings and other wear and tear on the short life of the equipment.
Electric current – Fans at the rated working voltage, the current flowing through the fan
What’s the Start Voltage?
Start voltage means: the first power supply voltage zero condition, turn the fan, the voltage rotate the knob, the voltage gradually increased, the fan start to the minimum voltage.
Because the voltage supplied board may be unstable, starting voltage is lower, ensures that voltage instability, can start the fan pressure activated.
Conventional 5V fans are starting voltage 3.5V;
Conventional 12V fans are starting voltage 6.5V ;
Thanks your for your reading.
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Post time: Dec-16-2022