Lifting device and method for starting up the hoisting gear of such a lifting device

A lifting device comprising:

• a hoisting gear comprising a hoisting cable runnable from a hoisting gear drum drivable by a hoisting gear drive;
• a hoisting gear brake and a hoisting gear controller, wherein the hoisting gear drive is actuatable by the hoisting gear controller, wherein the hoisting gear controller comprises a start-up control stage for starting up the hoisting gear from a braked position, wherein a starting torque at the hoisting gear drive is buildable by the startup control stage when the hoisting gear brake is closed;
• and
• a load detection device, wherein a current hoisting load when the hoisting gear brake is closed is detectable by the load detection device, wherein the start-up control stage comprises a starting torque adjuster, wherein the starting torque is variably adjustable in dependence on a detected current hoisting load such that a hoisting force providable by the starting torque of the hoisting gear corresponds to the detected current hoisting load,
• wherein the load detection device comprises a force measurement axis reeved into the hoisting cable with which a load detector is associated.

A lifting device comprising:

• a hoisting gear comprising a hoisting cable runnable from a hoisting gear drum drivable by a hoisting gear drive;
• a hoisting gear brake and a hoisting gear controller, wherein the hoisting gear drive is actuatable by the hoisting gear controller, wherein the hoisting gear controller comprises a start-up control stage for starting up the hoisting gear from a braked position, wherein a starting torque at the hoisting gear drive is buildable by the startup control stage when the hoisting gear brake is closed;
• and
• a load detection device, wherein a current hoisting load when the hoisting gear brake is closed is detectable by the load detection device, wherein the start-up control stage comprises a starting torque adjuster, wherein the starting torque is variably adjustable in dependence on a detected current hoisting load such that a hoisting force providable by the starting torque of the hoisting gear corresponds to the detected current hoisting load,
• wherein the hoisting gear controller comprises a frequency converter, wherein the hoisting gear drive is actuatable by the frequency converter, wherein the starting torque as a fraction of a nominal motor torque of the hoisting gear drive is calculatable by the starting torque adjuster, and wherein a starting value for the frequency converter from a calculated fraction of the nominal motor torque is calculatable by the starting torque adjuster.

A lifting device comprising:

• a hoisting gear comprising a hoisting cable runnable from a hoisting gear drum drivable by a hoisting gear drive;
• a hoisting gear brake and a hoisting gear controller, wherein the hoisting gear drive is actuatable by the hoisting gear controller, wherein the hoisting gear controller comprises a start-up control stage for starting up the hoisting gear from a braked position, wherein a starting torque at the hoisting gear drive is buildable by the startup control stage when the hoisting gear brake is closed;
• and
• a load detection device, wherein a current hoisting load when the hoisting gear brake is closed is detectable by the load detection device, wherein the start-up control stage comprises a starting torque adjuster, wherein the starting torque is variably adjustable in dependence on a detected current hoisting load such that a hoisting force providable by the starting torque of the hoisting gear corresponds to the detected current hoisting load,
• wherein the starting torque adjuster comprises a lever arm determiner, wherein a lever arm of the hoisting cable with respect to the hoisting gear drum is determinable via the lever arm determiner, wherein the starting torque in dependence on a determined lever arm is determinable by the lever arm determiner, and wherein the lever arm is calculatable by the lever arm determiner from an unwound hoisting cable length and/or a detected number of winding layers on the hoisting gear drum.