WilliamNance's blog

At present, large-capacity EC Blower flow adjustment has been a lot of frequency control mode, this type of inverter is mainly dependent on imports, expensive. At present, the power rating of 1kw below the fan, especially the home air conditioner and other fans have permanent magnet brushless DC motor drive, and the use of speed regulation mode.

1 ~ 10kw power range of the huge amount of fan, the basic use of induction motor drive, and adjust the air opening way to adjust the air volume. For this power range of the fan, the use of permanent magnet brushless DC motor drive to replace the original induction motor drive has great advantages.

EC blower because of the use of permanent magnet excitation, eliminating the induction motor excitation current loss; the same time permanent magnet brushless DC motor work in synchronous operation mode, eliminating the induction motor rotor core frequency loss.

These two aspects of the permanent magnet brushless DC motor operating efficiency is much higher than the induction motor, small-capacity motor efficiency is more obvious.

EC Axial Fan requires rectangular wave current, the inverter running current rating refers to the peak of this rectangular wave. Induction motors require sine wave current, the current rating of the inverter running continuously refers to the effective value of this sine wave.