What is an EC fan and what are its advantages?

When it comes to the EC fan, most people may not know what kind of fan it is. If it is a DC fan, everyone must know it. In fact, the EC fan is usually referred to as a DC fan, but different from ordinary DC fans, it is a DC fan that can directly connect to the AC power supply. Next, we will talk about the knowledge and advantages of EC fans:

Description of EC fans:

The EC fan is a new type of fan industry. It is different from other DC fans in that it can supply power not only with DC voltage but also with AC voltage. Voltage from dc 12v, 24 v,48v, to ac 110V, 380V can be universal, no need to add any inverter conversion. All motors with zero internal components are dc power supply, built-in DC variable AC, rotor position feedback, three-phase AC, permanent magnet, synchronous motor.

Advantages of the EC fan:

The EC motor is a brushless DC maintenance-free motor with a built-in intelligent control module. It has RS485 output ports, 0-10V sensor output ports, 4-20mA speed switch output ports, alarm device output ports, and master/slave signal output ports. The product has the characteristics of high intelligence, high energy saving, high efficiency, long life, low vibration, low noise and continuous uninterrupted work.

Brushless DC motor is greatly simplified in structure because the collector ring and brush used for excitation are omitted. At the same time, not only the process of the motor is improved, but also the mechanical reliability of the motor operation is greatly enhanced, and the service life is increased. At the same time, air gap flux density can be greatly improved, motor index can achieve the best design, its direct effect is the motor volume reduction, weight reduction. Moreover, compared with other motors, it also has excellent control performance.

1， Because of the high performance of permanent magnet material, the torque constant, torque inertia ratio and power density of the motor are greatly improved. Through reasonable design, the indexes of moment of inertia, electrical and mechanical time constant can be greatly reduced, which are the main indexes of servo control performance.

2， Modern permanent magnet magnetic circuit design has been more perfect, coupled with the high coercivity of permanent magnet materials, so the permanent magnet motor armature reaction and anti-demagnetization ability is greatly strengthened, motor control parameters greatly reduced with the influence of external disturbance.

3. As the permanent magnet is used to replace the electric excitation, the design of the excitation winding and magnetic field is reduced, so the excitation flux, the inductance of the excitation winding, the excitation current and many other parameters are reduced, and the controllable variables or parameters are directly reduced.

Based on the above factors, it can be said that the permanent magnet motor has excellent controllability, and the EC fan is driven by permanent magnet brushless DC motor instead of the original induction motor, which has great advantages.