Abstract:
A system for operating an electric machine and a method for protecting an operation control unit in such a system. The system includes an operation control unit, an alternating current cable connecting the machine with the operation control unit and an electric short-circuiting arrangement. This arrangement is connected to terminals of the operation control unit facing the cable and short circuits these terminals based on a detected overvoltage.
Abstract:
A drive controller arranged to provide electrical power from a power supply to a machine or load over a long AC power cable of the order of kilometers. The drive controller is arranged with circuits and/or control processes to provide AC current at a constant ratio of voltage and frequency to said machine or load. The drive controller maintains voltage and frequency at the machine terminals despite fluctuations in voltage and/or frequency that would ordinarily be caused by the load. This is done by estimating the voltage and current at the machine terminals and adapting the drive controller output accordingly to actively vary the converter output dependent on the load of the machine or other load. In other aspects of the invention a method and a computer program for carrying out the method are described.
Abstract:
A method for providing maintenance to an electrical power generation, transmission and distribution system, and an information system and one or more computer program software means for carrying out same. A method to provide maintenance to an electrical power generation facility and/or an electrical power transmission and distribution network system operated by a Utility. Maintenance personnel visit a site to inspect a condition of said apparatus, and examine information from an Information System operated in co-ordination with a Help Desk. The method comprises further steps such as preparing a report of the apparatus with a mobile web camera, making a report comprising a graphic image of the condition of said apparatus, receiving at said Help Desk and Information System the report and graphic image from the inspector/repairman, finding stored information about said apparatus and/or said system in said Information System, comparing said stored information with the report and/or graphic image, the inspector/repairman making in consultation with the Help Desk an assessment of the condition of said apparatus and providing a recommendation such as a repair, a temporary repair or making a plan for a repair at a later time.
Abstract:
A method for detecting water breakthrough in a well production. A model, of which the accuracy is known, will receive three of the four following parameters: inlet pressure, inlet temperature, outlet pressure, outlet temperature. The model includes a three-phase flash model including heat of evaporation of water and partial pressure of water with or without dissolved components lowering the vapor pressure such as salt and/or alcohol. Based on the three parameters the model computes the fourth parameter, whereupon the actual fourth parameter is measured and compared to the computed fourth parameter. If the deviation between the measured and the computed parameter is considerably larger than that which can be explained from the level of confidence of the selected model and uncertainty of measurement, it can be concluded that a water breakthrough has actually occurred.
Abstract:
A robot wrist with a plurality of rotatable parts arranged in series with each other arranged to be mounted on a robot arm or automation machine to enable rotary movement of a first wrist part about a first axis and a second wrist part journalled in the first wrist part. Each wrist part may be arranged with one or more gear members to drive a rotary movement and rotate any wrist part relative to another wrist part. At least one gear member of one engaging pair is a concave bevel gear arranged with negative bevel angle to the plane of rotation at the engaging face. In another embodiment the robot wrist has three wrist parts. The robot wrist may also include an inner protection hose.
Abstract:
A system for visualizing process errors that occur in connection with processing a workpiece by means of a process tool and an industrial robot moving the tool along a path in relation to the workpiece during the processing. The system is configured to store information on process errors and information on where on the robot path the error occurred upon detecting the process errors and to present a visualization of the robot path and the position of the stored errors in relation to the robot path.
Abstract:
A method for localizing a node in a wireless network, the method including: receiving location signals transmitted by beacons, the location signals including information about the locations of the respective beacons; detecting the respective received signal strengths of the received location signals; obtaining information about the different signal levels at which the beacons can transmit; studying the received location signals; determining the signal levels used by each of the beacons for the transmission of the location signals, based on the studying of the received signals; calculating a distance to each of the beacons based on the detected signal strengths and the determined signal levels; and localizing the node by means of the received location information and the calculated distances. The invention also relates to a node ant to a wireless network.
Abstract:
An insulated hose for a high voltage paint application apparatus including an inner hose containing a fluid or paint charged at a high voltage. The flexible inner tube hose is arranged inside at least one flexible mechanical protection tube or layer and an air excluding medium is enclosed between flexible inner tube and first flexible mechanical protection layer. A mechanical protection layer may be surrounded by an electrical protection layer which is grounded. A system for applying paint or other fluid materials at a high voltage is also described.
Abstract:
Controller capable of executing non-safety-related control logic. A safety module is added to the controller in order to increase the safety-integrity level of a control system. The controller is able to execute safety-related control of real-world objects. Such a control system may exist at an offshore production platform or in a hazardous area of a chemical plant.