Abstract: A generator assembly including generator means and a first converter member (11), the generator means being arranged to convert mechanical power to electric power and comprising an AC generator (2), a voltage regulator (4) and an AC coupling, the voltage regulator (4) being arranged to regulate magnetization of the AC generator (2) on the basis of data associated with the voltage of the AC coupling of the generator means, the AC coupling being arranged to supply electric power from the AC generator (2) to the first converter member (11), and the first converter member (11) being arranged to rectify the voltage applied through the AC coupling into DC voltage. The first converter member (11) isarranged to adjust the power of the AC generator (2) by changing the component (I q) associated with the torque of the current passing through the AC coupling so as to provide the power of desired magnitude.

Abstract: The invention relates to a method for controlling a crane, the method comprising defining, at each time, the distance (s) the crane moves before stopping and without swinging of the load fastened to it by summing up a stopping distance (s1), which is calculated on the basis of the internal target velocity, i.e. the velocity which the control of the algorithm implementing this has after the stored velocity changes are entirely implemented, by using the selected deceleration ramp; and a distance (s2), which is calculated on the basis of stored velocity change requests stated before the stopping decision and on the basis of remaining performance times.

Abstract: The invention relates to a method for controlling swaying and swinging of a spreader in a crane and the load attached thereto, the crane comprising: a trolley, hoist gears, hoisting ropes, on which the spreader is suspended from the trolley, auxiliary gears provided with motors and motor control equipment and auxiliary ropes, and in which method the forces of the auxiliary ropes exerted on the spreader are controlled by moving the auxiliary ropes using the auxiliary gears by means of torque instructions (Tcontrol) obtained on the basis of the rope forces (Frope) of the auxiliary ropes and the rotating speed data of the auxiliary gears, and whereby the rotating speed data of each auxiliary gear is formed gear-specifically as the difference between the measured rotating speed (nact) of the auxiliary gear and the calculated rotating speed (ncalc) of the auxiliary gear.

Abstract: The invention relates to a method for controlling swaying and swinging of a spreader in a crane and the load attached thereto, the crane comprising: a trolley, hoist gears, hoisting ropes, on which the spreader is suspended from the trolley, auxiliary gears provided with motors and motor control equipment and auxiliary ropes, and in which method the forces of the auxiliary ropes exerted on the spreader are controlled by moving the auxiliary ropes using the auxiliary gears by means of torque instructions (Tcontrol) obtained on the basis of the rope forces (Frope) of the auxiliary ropes and the rotating speed data (n) of the auxiliary gears, and whereby the torque instruction of the motor control equipment in each auxiliary gear is formed gear-specifically as a sum of a static (Tstat) and a dynamic (Tdyn, calc) term.

Abstract: The invention relates to a crane comprising bogie structures (3) in the corners of the crane, a tandem drive wheel and idle wheel (8, 9) arranged in each bogie structure and provided to turn in the bogie structure offset from their vertical axes, and a turning device arrangement (15, 16) provided between each wheel pair for turning the wheel pair in cooperation to a selected position, the turning device arrangement comprising at least two turning rods (15, 16) connecting the wheels, which turning rods are connected to counterparts (17, 18, 19, 20) provided for each turning position or function in load-bearing structures (10, 11) of the wheels (8, 9) and turning along therewith, whereby at one wheel the position of the turning rods or the counterparts in the load-bearing structure is slidable around the load-bearing structure, yet the one of the counterparts or turning rods that corresponds to the selected turning position may be locked with a locking mechanism (21, 22, 23, 24) immobile with respect to the loa

Abstract: The invention relates to a method for controlling a crane, the method comprising comparing velocity requests (Vref) given by a crane control system with a previous velocity request and, if the velocity request is changed, forming and storing an acceleration sequence for the corresponding velocity change, summing the velocity changes defined by the stored acceleration sequences at a particular time and adding the obtained sum (dV) to the previous velocity request to achieve a new velocity request (Vref2), which is set as a new control and velocity request for the crane drives (11, 12), and performing some of the velocity changes defined by the summed acceleration sequences at the definition time of each selected sequence on each program round, i.e. control step, and performing the rest of them as delayed in such a manner that the stored sequence parts to be performed as delayed are read and summed on a plurality of program rounds.

Abstract: A system and method for controlling the telescopic movements of two telescopic beams moving inside a spreader frame, and the locking movements of the twistlocks in the telescopic beams. The telescopic movement of the telescopic beams are held in position at a desired place in relation to the frame with locking members. The system has a joint multi-rope lever system for performing the telescopic movement of the telescopic beams and the locking movements of the twistlocks. The system has an actuator operating the multi-rope lever system. The system also includes a control system supervising and controlling the actuator and the lever system.

Abstract: An apparatus for a locking unit of a container spreader having at least a pair of telescopic beams comprising a housing, a twistlock head partially inside the housing and partially protruding out from the housing, an elastic impact absorption element and a toothed coupling to transmit the necessary engagement torque to the twistlock head. The locking unit is equipped with a coupling that has been arranged to allow the movement of the twistlock head in all directions on a plane perpendicular to the rotation axis of the twistlock head.

Abstract: The invention relates to a method for controlling a crane, the method comprising defining, at each time, the distance (s) the crane moves before stopping and without swinging of the load fastened to it by summing up a stopping distance (s1), which is calculated on the basis of the internal target velocity, i.e. the velocity which the control of the algorithm implementing this has after the stored velocity changes are entirely implemented, by using the selected deceleration ramp; and a distance (s2), which is calculated on the basis of stored velocity change requests stated before the stopping decision and on the basis of remaining performance times.

Abstract: The structure and operation of a brake 1? associated with an electric motor driven chain hoist 2?, according to FIG. 6, are exactly the same as those of the manually operated system, except that a shaft 4a? of the electric motor rotor 4? as well as an extension 4b? thereof form a drive shaft and the second cam part 6, the brake disc/clutch disc arrangement 9, 10, 8, a driven input shaft 7? of a hoisting apparatus 2? and the hoisting apparatus 2? itself are arranged between an electric motor 3? and the first cam part 5 on the drive shaft 4b? in such a manner that the second cam part 6 with the components 8, 9 fastened thereto may rotate therein and move axially and the input shaft 7? of the driven hoisting apparatus 2? may rotate, since the rotor 4? is placed on the opposite side of the system compared with the manually operated system shown in FIGS. 1 to 4 so that the extension 4b? of the shaft 4a? of the rotor 4? has to move through the input shaft 7?.

Abstract: The invention relates to an arrangement for placing crane mechanisms, the crane comprising lifting mechanisms (1) with lifting drums (2), lifting ropes (3) in the lifting drums, a lifting trolley (4), a loading element (5) suspended from the lifting trolley (4) by the lifting ropes (3), four auxiliary mechanisms (10) controlling the swaying and twisting of the loading element (5) and the load (9) fastened to it, auxiliary ropes (12) in the rope drums (11) of the auxiliary mechanisms (10), and turning sheaves (13) of the auxiliary ropes (12) in the loading element (5). The lifting mechanisms (1) and lifting drums (2) are fixed to the frame of the crane, the auxiliary mechanisms (10) with their rope drums (11) are located in the lifting trolley (4), and the auxiliary ropes (12) are led from the turning sheaves (13) to a storage drum (14) for the auxiliary ropes in the lifting trolley (4), the storage drum being equipped with an additional mechanism (15) that is independent of the lifting mechanisms (1).

Abstract: The invention relates to a method for controlling swaying and swinging of a spreader in a crane and the load attached thereto, the crane comprising: a trolley, hoist gears, hoisting ropes, on which the spreader is suspended from the trolley, auxiliary gears provided with motors and motor control equipment and auxiliary ropes, and in which method the forces of the auxiliary ropes exerted on the spreader are controlled by moving the auxiliary ropes using the auxiliary gears by means of torque instructions (Tcontrol) obtained on the basis of the rope forces (Frope) of the auxiliary ropes and the rotating speed data of the auxiliary gears, and whereby the rotating speed data of each auxiliary gear is formed gear-specifically as the difference between the measured rotating speed (nact) of the auxiliary gear and the calculated rotating speed (ncalc) of the auxiliary gear.

Abstract: A disc brake to be opened by torque is arranged between a drive shaft and a driven shaft and comprising a brake wheel arrangement arranged between the drive shaft and the driven shaft, a friction surface arrangement arranged to co-operate with the brake wheel arrangement, at least one spring device arranged to press the brake wheel arrangement and the friction surface arrangement axially against each other, and a cam arranged between the drive shaft and the brake wheel arrangement, and the cam causing by the impact of the torque or rotation of the drive shaft and the possible countertorque of the driven shaft the relative axial position between the brake wheel arrangement and the friction surface arrangement to change in order to detach at least partly the braking engagement against the spring force caused by the spring device.

Abstract: A rope hoist provided with traversing machinery, the rope hoist comprising a trolley (2), and in connection therewith a lifting gear (3), a lifting rope (4), rope pulleys (5) and traversing machinery (7) for moving the trolley (2). The traversing machinery (7) allows to move the trolley (2) along a girder (11), for example. Rope pulleys (5) are used to reduce the strength of the rope. A part of the traversing machinery (7) is arranged inside at least one rope pulley (5) in such a manner that at least one shaft in the traversing machinery (7) remains at least partly inside the rope pulley (5).

Abstract: The invention relates to a method for controlling the operation of a crane brake, the crane comprising an electric motor (2) controlled by means of a frequency converter (10) for hoisting and lowering movements of the crane; an electromechanical brake (9) having an impact on said movements, the brake being opened when the motor is started for a hoisting or lowering operation; a load sensor (8) weighing a load (7) to be handled; and an overload protection connected to the sensor, the frequency converter (10) being used for calculating the torque of the motor (2), which information is compared with the load information, or weight, obtained from the load sensor (8).

Abstract: A hoisting apparatus comprising a frame (2), a rope drum (3) provided with a groove (12), a hoisting motor (4), a gear (5) and a pinion (6). The hoisting motor (4) is at least partly positioned inside the rope drum (3) supported against the frame (2) by its both ends. The hoisting motor (4) and the gear (5) are supported against the frame (2) only by one end of the rope drum (3), by which end the hoisting motor (4) and the gear (5) are arranged to rotate the rope drum (3) via the pinion (6). The pinion (6) is positioned between a cylinder, which is parallel to the longitudinal axis of the rope drum (3) and defined by the housing (15) of the hoisting motor (4), and the rope drum (3).

Abstract: A method and an apparatus for controlling release of a hoisting motor brake in a hoisting apparatus, where electricity is used as the driving force and a squirrel cage motor as the hoisting motor for hoisting or lowering a load attached to a hoisting member of the hoisting apparatus. Controlling of brake release comprises measuring the current and supply voltage of the hoisting motor after the start-up period of the hoisting motor and determining a variable which describes the load of the hoisting apparatus from the current and supply voltage. The variable describing the load is compared with a pre-determined limit value and hoisting or lowering of the load is interrupted if the variable describing the hoisting apparatus load exceeds the limit value set for the hoisting movement when the load is hoisted or if it exceeds the limit value set for the lowering movement when the load is lowered.