The difference between ac cooling fan and dc cooling fan
dc cooling fan works:
dc cooling fan works by dc voltage and electromagnetic induction, the electrical energy into mechanical to drive the blades rotating, rely on the coil and IC switch, inductive magnetic ring from drive the blades rotating.
dc cooling fan structure:
dc cooling fan rotor including dc cooling fan blades, is the source of air flow, the axis of the fan, used to support balanced rotor blades rotate, magnetic ring, permanent magnets, promote level magnetic switch speed key, circular box, fixed the circular. In addition, also includes the support of the spring, through these parts to fixed tuberculosis turn the whole parts, motor parts, production of rotation, and move the size of the critical rotational speed. The speed control performance is good, control is simple.
dc cooling fan material characteristics:
dc cooling fan material is alloy materials, life can be more than 50000 hours of continuous use, internal structure of transformer and main control board (dc Including the inverter circuit, rectifier, filter, amplifier circuit, etc. ) Not affected by voltage fluctuation, so its service life is longer than the
ac cooling fan works:
working principle of the ac fan driven by ac power, voltage will be positive and negative alternating, don't rely on circuit control, the magnetic field is produced. Power frequency is fixed, silicon steel sheet produced by pole change speed, this is determined by the power frequency, the higher the frequency the faster the speed of magnetic switch, the faster the speed will theoretically. Frequency, however, also cannot too fast, too fast will cause problems start.
ac cooling fan structure:
ac fan ( Single phase) Internal structure is composed of two coil winding, one is the startup winding, the winding in series, thus formed the three points, series connection point for the public side, the startup winding end run to start the end winding terminal for running the end, in addition, also need a startup capacitor, usually between the capacity of 12 uf, usually 250 v voltage, there are two joints, a head start at the end of winding, a head by the end of the winding operation, form a triangle, power supply ( Do not need to distinguish between zero line of fire A joint running winding end ( Namely and capacitor of a head also connect together) , another public side, the grounding line took the motor shell.
ac cooling fan material characteristics:
the internal structure of ac fan with transformer is given priority to, most of the information exchange fan selection using home-made put cupping is commonly tungsten needle or stainless steel material, if the voltage shake is too big, can affect the service life of the transformer
the above is a cooling fan manufacturer chi small make up for ac dc fan fan and the difference between a share, the hope can help a friend in need