| 摘要 |
<p>Disclosed is a method for controlling a constant air volume of a BLDC motor which is applied to a gas range hood or a wind producing device. The method is provided to constantly control the air volume even though there are changes in an AC input voltage having about±10% errors and continuous changes in a constant voltage due to external factors (i.e.: a filter in a suction unit, suction air density, an environment of a discharge unit, etc.), thereby efficiently purifying air by constantly controlling the air volume even in the high constant voltage as in the low constant voltage and reducing noises by maintaining the constant air volume in the low constant voltage as in the high constant voltage.</p> |
