What is the advantage of EC fan what is it?
Speaking of EC fan, most people may not know is what kind of fan, if dc fan must have known, said in fact, we usually say of EC fan is dc fan, but also different from ordinary dc fan, it can be directly to the external AC dc fan. Tong chi car for next for you about the knowledge of EC fan and advantages:
EC fan description:
new varieties of EC fan is the fan industry, it is different from other dc fan, it not only can use dc voltage power supply, but also can use ac voltage power supply. Voltage from the dc 12 v, 24 v, 48 v, the ac 110 v, 380 v can be general, don't need to add any inverter transformation. All internal components zero dc power supply, built-in dc ac motor as power, USES the rotor position feedback, three-phase ac, permanent magnet synchronous motor.
the advantages of EC fan:
EC of brushless dc motor for the built-in intelligent control module type WeiHuXing motor, output with RS485 interface, 0 , 4-10 v sensor output interface 20 ma speed switch output interface, alarm output interface and master-slave signal output interface. The products with high intelligence, high energy saving, high efficiency, long life, small vibration, low noise and can work continuously uninterrupted characteristics such as:
because of eliminating the excitation brushless dc motor with the collector ring and brush, in structure is greatly simplified. At the same time not only improved the technology of motor, and the motor running mechanical reliability enhanced greatly, increase the service life. Air gap flux density can be greatly improved at the same time, the motor index which can realize the best design, the direct effect is smaller motor, reduction in weight. Not only that, compared with other motor, but also has very good control performance. Due to the high performance of permanent magnet motor constant torque, torque to inertia ratio and greatly improve the power density, etc. Through the reasonable design and make the moment of inertia, electrical and mechanical time constant index is greatly reduced, as the main indicator of servo control performance has improved a lot. Modern permanent magnet magnetic circuit design has been more perfect and high coercive force of permanent magnet material, thus an armature reaction of permanent magnet motor and have also strengthened the ability of resistance to demagnetization, motor control parameters with the external disturbance affects greatly reduced. Because of permanent magnets to replace the electric field, reduce the exciting winding and the design of the excitation magnetic field, and thus reduce the excitation flux, exciting winding inductance, excitation current, and many other parameters, thereby directly reducing the controllable variables or parameters.
integrated all factors mentioned above can say permanent magnet motor has excellent controllability, EC fan driven by permanent magnet brushless dc motor instead of induction motor drive has great superiority.
