METHOD OF CONTROLLING ROTATION SPEED OF MOTOR OF SPEED-CONTROLLABLE HOIST DRIVE, AND HOIST DRIVE

A method according to the invention of controlling a rotation speed of a motor of a speed-controllable hoist drive comprises receiving a lift speed instruction; forming a final speed instruction by using initial information containing the lift speed instruction; and using the final speed instruction...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	JUSSI KIOVA, JANNE SALOMÄKI
Format:	Patent
Sprache:	eng ; por
Schlagworte:	CAPSTANS CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER CRANES ELECTRICITY GENERATION HAULING HOISTING HOISTS LIFTING LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES PERFORMING OPERATIONS TACKLES, e.g. PULLEY BLOCKS TRANSPORTING WINCHES
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Beschreibung
Zusammenfassung:	A method according to the invention of controlling a rotation speed of a motor of a speed-controllable hoist drive comprises receiving a lift speed instruction; forming a final speed instruction by using initial information containing the lift speed instruction; and using the final speed instruction as a speed instruction for the rotation speed of the motor of the speed-controllable hoist drive. The method further comprises monitoring a position derivative of an actual value of a cable force. The initial information for forming the final speed instruction comprises the position derivative of the actual value of the cable force.