ABB Ltd

About: ABB Ltd is a company organization based out in Zurich, Switzerland. It is known for research contribution in the topics: Voltage & Signal. The organization has 6222 authors who have published 6852 publications receiving 83994 citations.

Method for Displaying Data in an Industrial Control System

Abstract: A method for distribute or share data provided by a server process of an industrial control system to a client process running on a first machine of a first user, with a client process running on a machine of a second user. The server session is logged by said server process. It is determined that the first user makes a selection to distribute or share a client process with at least one second user. An address is retrieved for the at least one other user, and a channel is opened thus providing the same said data provided to the client process running on the first machine to a client process running on a second machine of at least one second user. In other aspects of the invention a system, a human-machine interface and a computer program for carrying out the method are described

Analytic formulation of the response of a two-wire transmission line excited by a plane wave

Abstract: A perfectly conducting uniform two-wire transmission line of finite length illuminated by a plane wave is considered. The induced voltage and current-responses are described by analytic expressions in the frequency and time domains. Moreover, an instructive case study is presented. This simplified and cost effective method can be an important part of the theoretical NEMP-analysis of systems. >

Method for operating a combustion plant.

Abstract: In a combustion plant, fresh air (6) is drawn in via a blower (5), which acts outside the surround of the combustion plant, and mixed with a portion of flue gases (7) which are removed from combustion chamber (1). The resulting fresh air/flue gas mixture (8) flows through, on its way to the combustion chamber (1), a first heat exchanger (2a), the calorific preparation of which is brought about by the flue gases (7) supplied. In the combustion chamber (1) itself, this mixture flows through a heat exchanger (2) located there. Before the thus preheated mixture (9) is supplied to a burner (4) as combustion air, it undergoes, via a series of jet injectors (3), a further mixing with flue gases, which raises the temperature of this combustion air (10), with optimised flue-gas proportion. … …

Burner for operating an internal combustion engine, a combustion chamber of a gas turbine group or firing equipment

Abstract: In a burner for operating an internal combustion engine, a combustion chamber of a gas turbine or firing equipment, which consists essentially of at least two hollow conical partial bodies (1, 2) positioned one upon the other in the flow direction, the ignition of the air/fuel mixture forming in the hollow conical space (14) takes place by means of ignition electrodes (24a, 24b, 25a, 25b) which are placed at a location where there is a low flow velocity of the combustion air (15). This achieves the effect that the flame tongues starting from the electrode ends (25a, 25b) of the ignition electrodes (24a, 24b) can feed a flame front (7) forming at the outlet from the burner continuously and along ordered paths, i.e. paths directed in the flow direction with slight swirl in consequence of the motion of the combustion air (15), so that a stable reverse flow zone (6) forms.

Inherent temperature compensation of fiber-optic current sensors employing spun highly birefringent fiber

Abstract: We investigate the various contributions to the temperature dependence of an interferometric fiber-optic current sensor employing spun highly-birefringent sensing fiber, in particular, the contributions from the fiber retarder at the fiber coil entrance, the spun fiber's birefringence, and the Faraday effect. We theoretically and experimentally demonstrate that an appropriately designed retarder inherently compensates the temperature dependence of the fiber birefringence and the Faraday effect. We demonstrate insensitivity to temperature to within ± 0.2% between -40 and + 85 °C. Furthermore, we analyze the influence of the retarder parameters on the linearity of the recovered magneto-optic phase shift vs. current and determine a set of parameters that results in a perfectly linear relationship.