Abstract: A system includes at least two power semiconductor chips being connected in parallel and including each a gate terminal for switching the power semiconductor chip in a blocking-state by a first gate voltage and for switching the power semiconductor chip in a conducting-state by a second gate voltage. The system includes further a control device adapted for applying the first or the second gate voltage to the gate terminals of the at least two power semiconductor chips. The control device is adapted for applying a third gate voltage to the gate terminal of the at least one remaining power semiconductor chip when a power semiconductor chip fails, and that the third gate voltage is higher than the second gate voltage.

Abstract: A switching device for electric power distribution, electrically connectable to an electrical conductor, the switching device including a breaker electrically connectable to the electrical conductor, and an electrically conductive housing to which the breaker is mounted, the switching device providing a current path between the breaker and the electrical conductor, and the housing houses a guiding member for operating the breaker, the guiding member being movable in relation to the housing, the housing having an outer surface, wherein the housing has a smooth outer shape to distribute the electric field generated by the voltage of the current through the switching device. A switchgear including such a switching device.

Abstract: A process turning disc connectable to an output shaft of a motor configured to rotate the process turning disc about a first center axis of the process turning disc. The process turning disc being configured to guide a cable or hose. A first flange is connectable to an end part of a robot arm. A second flange is connectable to a tool element. The flanges are spaced apart from each other by an intermediate connecting member. The connecting member is connected to the flanges. The connecting member provides a passage between the flanges. The passage is configured to receive and guide the cable/hose. The passage has an inlet side for the cable/hose and an outlet side for the cable/hose. A robot arm including the process turning disc, a robot including the robot arm and a method that utilizes the process turning disc.

Abstract: A device and method for optimizing a programmed movement path for an industrial robot holding a tool to carry out work along the path during a work cycle. The movement path includes information on positions and orientations for the tool at a plurality of target points on the movement path. The method includes for at least one of the target points: receiving a tolerance interval for the orientation of the tool in the target point, determining movements of the robot between the target point and one or more of the other target points on the path for a plurality of different tool orientations within the tolerance interval, selecting one of the different tool orientations as the tool orientation for the target point based on the determined movements of the robot and with regard to minimizing cycle time, and generating a robot program based on the selected orientation of the tool at the target point.

Abstract: The present invention relates to a method and a system for determining the relation between a local coordinate system located in the working range of an industrial robot (1) and a robot coordinate system. The method includes attaching a first calibration object (10) in a fixed relation to the robot and determining the position of the first calibration object in relation to the robot. Then, locating at least three second calibration objects (14,15,16) in the working range of the robot, a reference position for each of the second calibration objects in the local coordinate system can be determined by moving the robot until the first calibration object is in mechanical contact with each second calibration object. By reading the position of the robot when the calibration objects are in mechanical contact the relation between the local coordinate system and the robot coordinate system can be calculated.

Abstract: The present invention relates to a method and a system for facilitating calibration of a robot cell including one or more objects (8) and an industrial robot (1,2,3) performing work in connection to the objects, wherein the robot cell is programmed by means of an off-line programming tool including a graphical component for generating 2D or 3D graphics based on graphical models of the objects.

Abstract: A control system for controlling at least one industrial robot, wherein the control system comprises a plurality of software modules (41-47) for handling various system functions of the control system, and a plurality of separate hardware units (50-53), each comprising a processing unit (30a-d) and a memory unit (26a-d) for storing one or more of said software modules, and each of the hardware units is configured to receive and execute one or more of the software modules.

Abstract: Servo controller for controlling a plurality of motors including a master motor and a slave motor cooperatively driving a movable member. The servo controller is configured to control the master motor and the slave motor based on position references for the master motor. The servo controller includes a master speed controller configured to calculate a reference torque for the master motor based on speed errors for the master motor. The slave speed controller is configured to calculate reference torques for the slave motor based on speed errors for the slave motor. Each of the reference torques includes a proportional torque part and an integral torque part. The servo controller is configured to calculate each of the integral torque parts based on the speed errors of the master motor and the speed errors of the slave motor, such that the torques due to the integral torque parts will be distributed equally between the master and slave motors or according to a predefined ratio.

Abstract: The subject of the invention is a method of identification of weak and/or strong branches of an electric power transmission system. In the inventive method electrical parameters characterizing the nodes and branches of an electric power transmission system are subjected to computational treatment in order to obtain equations of power flow in all nodes of the system at assumed 100 percent system load value. Then an electric model of a branch is assumed and a curve P-Q is constructed which shows the functional relation between active and reactive load in the system. For the assumed branch model a branch voltage stability coefficient is determined. Then the analysed system is overloaded by increasing the total system load up to 120% base load and the branch voltage stability coefficient is determined again. The numerical values of the appropriately determined coefficients are compared with threshold values considered to be a safe margin for the maintenance of voltage stability for the given branch.