Detailed explanation of the difference between DC fan and AC

Detailed explanation of the difference between DC fan and AC fan

One: From the 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*10MM/40*40*10MM/50*50*10MM/60*60*10MM/40*40*20MM/50*50*15MM......120*120* 25MM

Two: From the technical point of view:

AC cooling fan: The single-phase internal structure is composed of two coil windings, one is the starting winding and the other is the running winding. These two windings are connected in series to form three points.

The series connection point is the common end, the start winding end is the start end, and the running winding end is the running end.

AC motors also need a starting capacitor. Usually the capacity is between 1-2uf, and the withstand voltage is usually 250v. This refers to the normal AC motor of the mains. This kind of capacitor is a polyester capacitor. There are no positive and negative poles. There are two connectors. One end is connected to the end of the starting winding and the other end is connected to the end of the running winding. There is no need to distinguish between the live wire and the neutral wire. One is connected to the end of the running winding (that is, it is also connected to one end of the capacitor), the other is connected to the common end, and the grounding wire is connected to the motor casing. Usually the start winding of a single-phase AC motor can also be used as the running winding. If the running winding and the start winding are reversed (that is, one end of the power supply is connected to the common end unchanged, and the running end is changed to the start end, so that the start winding is used as the running end. Winding), the motor will reverse. This is the only way to change the direction of the single-phase AC motor.

DC cooling fan:

The difference between a DC motor and an AC motor is that the tributary motor has three windings, which are respectively wound on the rotor, and a permanent magnet block is installed on the spindle to surround the rotor, and it does not need a starting capacitor, but it needs carbon brushes. Change the DC motor The method of turning is even simpler, as long as the positive and negative poles of the power input are changed.

Three: from the voltage: AC voltage: 110V/220V/240V/380V DC voltage: 5V/12V/24V/48V;

Four: From the application field:

AC fan: generally used on large equipment such as re-industrial machinery and medical equipment

DC fans: generally used in small equipment fields such as electronic equipment and electrical appliances.

The above is a professional cooling fan manufacturer-Ruiapple brings you a detailed explanation of the difference between DC fans and AC fans.

Shenzhen Ruiapple Electronics Co., Ltd. is a professional fan manufacturer with 20 years of R&D, production and sales experience. Main business: cooling fan, DC fan, AC fan, silent fan, centrifugal fan, blower and other full range of heat dissipation and ventilation products as an integrity enterprise, the series of cooling fan products have obtained UL, CUL, CE, CCC, ROHS, etc. International Certification.