Introduction to Cooling Fans
DC brushless fan structure: can be divided into rotor, stator, frame, motor (motor) the four main parts and some other bits and pieces of the components
First, the fan rotor part: including fan blades, is the core of the air flow, cooling fan axis, used to support the balance of the fan blade rolling, rotor magnetic ring, permanent magnets, to promote the magnetic level to switch the speed of the key, magnetic ring frame, fixed magnetic ring.
Second, the fan stator part: including the support of the spring, separate bearings to balance the axis, bearings, to provide high speed, low friction, long life rotation, snap ring, fixed nodule rotation of the whole part, the motor part, the production of the direction of rotation, the ability to move the size of the key to rotation speed.
Third, the cooling fan frame: to support the fan motor and the role of infusion.
Fourth, the fan motor part: including the circuit board, control energy consumption and signal in and out, silicon steel sheet (i.e., stator magnet, attached to the winding coil) to produce the magnetic level of propulsion switching, silicon steel sheet on the lower cover, fixed and insulator.
Basic knowledge of cooling fan
First, the size of the fan: the size of the fan size, generally to the outer edge of the fan length and product thickness dimensions, expressed in mm.
Second, the rated voltage: is the fan rated to run under the voltage value, the common DC fan voltage is generally 5V, 12V, 24V, 48V and other specifications.
Third, the fan speed: the degree of fan rotation in rpm (revolutions per minute), which is a more important parameter of the fan, high speed indicates that it can bring a large air volume, manufacturers often standardize their products into ultra-high (U), high (H), medium (M), high (H), high (H), and high (H).
Manufacturers often standardize their products into ultra-high (U), high (H), medium (M), low (L) and other rotational speed products for users to choose to use according to their own circumstances.
Fourth, air volume: a quantitative measure of a fan’s capacity in cubic feet per minute (CFM), but some places identify the unit as cubic meters per minute (CMM), 1CMM = 35.31CFM.
Fifth, wind pressure: Peugeot Zhi wind flow to overcome wind resistance, the indicator directly affects the ventilation and air exchange or cooling effect unit for mm-H2O, some places marked unit for inH2O, 1mmH2O = 0.03939inH2O.
Sixth, the noise value: is an important parameter, although the ventilation and cooling effect has nothing to do, but the use of different environments on the high requirements, the unit is dBA (decibel).
Seventh, the bearing system: the configuration is the soul of the fan components, directly related to the use of the product mechanical life. Often divided into ball bearings and oil bearings.
Eighth, the connector: is a fan on the more important details of the components, easy to be ignored, often divided into endless, 2P, 3P, 4P, such as forward and reverse.