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A brief description of EC fans:
EC fan is a new kind of fan industry. It is different from other DC fans. It can not only supply power by DC voltage, but also by AC voltage. Voltages from 12v, 24v, 48V DC to 110V, 380V AC can be used universally without adding any inverters. All internal parts of the motor are DC power supply, built-in DC converter AC, rotor position feedback, three-phase AC, permanent magnet, synchronous motor.
Advantages of EC Fans:
EC motor is DC brushless maintenance-free motor with built-in intelligent control module. It has RS485 output interface, 0-10V sensor output interface, 4-20mA speed control switch output interface, alarm device output interface and master-slave signal output interface. The product has the characteristics of high intelligence, high energy saving, high efficiency, long life, low vibration, low noise and continuous and uninterrupted operation. The structure of BLDCM is greatly simplified due to the elimination of collector rings and brushes for excitation. At the same time, it not only improves the technicality of the motor, but also greatly enhances the mechanical reliability and life of the motor.
At the same time, the air gap flux density can be greatly improved, and the motor index can achieve the best design. The direct effect is that the motor volume is reduced and the weight is reduced. Not only that, but also has excellent control performance compared with other motors. This is because: first, because of the high performance of permanent magnet materials, the motor's torque constant, torque inertia ratio, power density and so on are greatly improved. Through reasonable design, the inertia, electrical and mechanical time constants and other indicators can be greatly reduced, and as the main indicators of servo control performance has been greatly improved. Secondly, the design of modern permanent magnet circuit has been perfected, and the coercivity of permanent magnet material is high. As a result, the armature reaction and anti-demagnetization ability of permanent magnet motor are greatly enhanced, and the control parameters of the motor are greatly reduced with the influence of external disturbances. Thirdly, because permanent magnet is used instead of electric excitation, the design of excitation winding and magnetic field is reduced, so many parameters such as excitation flux, inductance of excitation winding and excitation current are reduced, thus controllable variables or parameters are directly reduced. All these factors can be said that permanent magnet motor has excellent controllability.