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The difference between an ac cooling fan and a dc cooling fan

Date:2018-11-08        Clicks:1138

The difference between an ac cooling fan and a dc cooling fan


One: from voltage:

Ac voltage: 110V/220V/240V/380V

Dc voltage :5V/12V/24V/48V

2. From specifications:

Ac cooling fan: 80*80*25MM/80*80*38MM/92*92*25MM/120*120*25MM/120*120*38MM/150*50MM/172*172*51MM/220*220*60MM/

Dc cooling fan:

30 * 30 * 10 mm / 40 * 40 * 10 mm / 50 * 50 * 10 mm / 60 * 60 * 10 mm / 40 * 40 * 20 mm / 50 * 50 * 15 mm... 120 * 120 * 25 mm

3. Technical aspects:

Ac cooling fan:

         The single-phase internal structure consists of two windings, one a starter winding and one a running winding, which are connected in series to each other, thus forming three points.



           The series point is the common end, the starting end is the starting end and the running end is the running end. The ac motor also needs a starting capacitor. Usually the capacity is between 1 and 2uf, and the pressure resistance is usually 250v. This refers to the normal use of the mains ac motor, this kind of capacitor is polyester capacitor, no is negative, 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 (no need to distinguish between wire zero line) a joint running winding ends (i.e., and a capacitor also meet together), another public side, ground wire took the motor shell.

           Usually single-phase ac motor can also be used as a running start winding winding, if switch run to start the windings (that is the power of a pick up to the public, by running the change from start the end, it is used as a running start winding winding), the machine can produce inversion, this is the only way to realize single-phase ac motor to change.


Dc cooling fan:

         Is the difference between dc motor with ac motor is: three tributaries of motor windings, respectively around the rotor, and install a permanent magnet block on the spindle, surrounded the rotor, and don't need to start the capacitance, but need to carbon brush, change the dc motor steering method is simple, as long as change over the power input is the cathode can be achieved.

Four: from the application field:

          Ac cooling fan: generally used in reindustrial machinery equipment, medical equipment and other large equipment above。Dc cooling fan: usually used in electronics and small equipment fields such as electrical appliances.