| 摘要 |
<p>PURPOSE: To recover a motor quickly from impact drop. CONSTITUTION: In case that the variation L of actual load that it receives from an external plant controller gets over the load variation standard L* per specified unit time being set in advance as an impact drop detection level, this motor controller suppresses the voltage standard Vd* on d axis motor armature voltage Eac in its turn the voltage Each of a motor armature only in specified field suppressive period by suppressing the field current on a (d) axis into a certain quantity of limitation, whereby this controller generates large potential difference (a voltage margin) between the converter output voltage Vac and the armature voltage Eac of the AC generator and quickens the rise of the output current of the motor. This quickens the recovery of the speed of the motor after impact drop by returning the voltage level to the original voltage standard Vd* on d axis after that.</p> |
