Save energy with EC motors in fans
With Electronically Comutated motors (or EC motors for short) in the fans you can save a lot of energy! No less than 45% of the world’s energy consumption comes from electric motors. EC motors consume up to 30% less compared to regular AC motors.
But what is the difference between AC motors and EC motors?
AC motors use the mains frequency to turn and an external frequency converter to determine the speed. An EC motor, on the other hand, is a brushless, permanent magnet motor with built-in electronics that control the torque and speed of the motor. As a result, EC motors have an IE4 efficiency class, which is the highest class in motor efficiency. But EC motors have another advantage: they are virtually silent because of the vibration-free running of the motor. And that in turn results in a longer lifespan.
Thanks to the built-in electronics, EC motors are versatile and can be controlled quite easily by means of a direct connection of, for example, a potentiometer, an analog 0-10VDC or 4 20mA signal or MOD bus. Thanks to an integrated PID control, it is also possible to connect a pressure sensor directly to the EC motor for constant pressure control in the VAV system.
Savings in installation costs:
EC motors are equipped with an integrated motor protection and the control is external. Thermal protections and relays, frequency controllers, transmissions, EMC shielded cabling and accessories are not required.
Because this motor type is an outer pole motor, the bearings are well protected against external influences.
(Source: http: //www.valktechnics.be)