The operation of ac drives in applications requiring high overload capability imposes hard working conditions on the electronic switching devices. The use of induction motors with two stator windings, fed by two inverter modules, allows large power rating in variable speed drives for high performance applications. This paper shows the structure and the main features of a fieldoriented control for a double winding motor, fed by two GTO inverters.The operational results of a 850 kW drive, working as a melt pump in a polyethylene plant, are reported in order to describe the obtained performances.
Abstract-Wireless Body Area Networks (WBANs) utilising Ultra Wideband communication channels often use a combination of thin sensor nodes and a heavy base node. The sensor nodes need to be as simple and low power as possible. This makes it difficult to maintain a good quality link. In this paper additional post processing steps at the base node are proposed in order to overcome these issues. A basis persuit denoising technique, using Prolate Spheroidal Wave Functions (PSWFs), combined with a sampling technique inspired by compressive sensing allows data to be recovered even when the link is interrupted for short intervals.
Abstract-This paper presents a new technique to perform parameterized sensitivity analyses of systems that depend on multiple design parameters, such as layout and substrate features. It uses the electromagnetic method called Partial Element Equivalent Circuit method to compute state space matrices at a set of design space points. These electromagnetic matrices are interpolated as function of the design parameters. The proposed interpolation scheme allows to compute the derivatives of the matrices, which are needed to perform the sensitivity analysis. An extensive study of the required stability and passivity properties of the system involved in the parameterized sensitivity analysis is presented in this work. Pertinent numerical results demonstrate the robustness, accuracy and efficiency of the proposed methodology.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.