At present, there are more and more domestic DC fresh fan brands, is the AC machine about to be elim

DC fresh fan is a new type of mechatronics fan that uses the principle of electromagnetic induction and uses the Hall induction component as a synchronous detection device to control a group of circuits, switch the winding energizing sequence, generate a rotating magnetic field, and realize electronic commutation. The cooling fan has a wide range of speed regulation, light weight, environmental protection and energy saving, controllability, reliability, environmental resistance and economy and other aspects have obvious advantages, and gradually replace other types of motors in the field of high performance, occupying a dominant position. A cooling fan uses direct current to power it.

The DC motor is composed of two parts: a stator and a rotor.

There are magnetic poles on the stator (winding type or permanent magnet type), and the rotor has windings, after the staff energizes it, a magnetic field (magnetic pole) is also formed on the rotor, and there is an angle between the magnetic poles of the stator and the rotor, and under the mutual attraction of the stator and rotor magnetic field (between the N pole and the S pole), it is the motor rotation.

The DC fresh fan technician told us that by changing the position of the brush, we can change the direction of the magnetic pole angle of the stator and rotor (assuming that the magnetic pole of the stator starts from the angle, and the magnetic pole of the rotor is on the other side, and the direction of the magnetic pole of the rotor to the magnetic pole of the stator is the direction of rotation of the motor).

Because the exchange is rotten, the profit is too low. In fact, AC is more concise and more power-saving.

The biggest difference between DC machine and AC machine is that DC machine is less noisy, better energy saving, and more convenient maintenance.

DC fresh air fan has the advantages of high energy saving, high efficiency, high power factor, long life, low vibration, low noise and low loss, as well as continuous and uninterrupted work.

According to reliable sources, GM will launch a new DC fan at the beginning of this year, but the specific time is estimated to wait for the official notice.

The biggest difference is that DC is used, which is convenient for speed regulation (DC motor voltage adjustment can be speed regulation); One uses AC, it is difficult to adjust the speed (the AC motor that supports the speed regulation function can only be adjusted with the inverter).

First, the advantages of DC motors.

1.The DC motor has good starting characteristics and speed regulation characteristics.

2.The torque of the DC motor is relatively large.

3.Repairs are cheaper.

4.The DC of the DC motor is more energy-saving and environmentally friendly than the AC.

Second, the disadvantages of DC motors.

1.DC motor manufacturing is more expensive.

2.There are carbon brushes.

3. Advantages of AC motors.

1.AC motors are cheaper to manufacture.

2.With the development of vector frequency conversion technology, it has been possible to simulate direct current with frequency conversion motors3Compared with DC motors, it has enough advantages in simple structure, easy maintenance, low environmental requirements, energy saving and improving productivity, so that AC speed regulation has been widely used in industrial and agricultural production, transportation, national defense and daily life.

Generally speaking, DC motors have more advantages than AC motors: good speed regulation performance (stepless speed regulation can be easily realized), high energy saving, high efficiency, high power factor, long life, low vibration, low noise, low loss and continuous and uninterrupted work. It also comes with built-in thermal protection and fault detection.

The current application trend will gradually adopt the DC motor method, just like the DC motor is now popular in household air conditioners.