| 摘要 |
<p>The method involves driving a rotor of a milling device using an alternating current motor. Speed of the motor is measured using a rotating component i.e. Hall sensor, that is rotationally connected to the milling device. A measurement value related to the speed is utilized for determining capacity of the mill. Idle speed of the milling device is determined in the absence of mill material. The idle speed is utilized as a reference value for subsequent measurements. The idle speed is set in relation to line frequency, after a rated value of the line frequency is selected.</p> |
