Ivan Yatchev, Mehmet Sen, Iosko Balabozov and Ivan Kostov
The purpose of the paper is to clarify the influence of introducing magnetic concentrators on the performance of Hall effect based current sensors and to obtain dependencies of…
Abstract
Purpose
The purpose of the paper is to clarify the influence of introducing magnetic concentrators on the performance of Hall effect based current sensors and to obtain dependencies of the sensor characteristics on the conductor position.
Design/methodology/approach
The finite element method and Comsol software are used for analysis of the three-dimensional magnetic field of the constructions of Hall effect based current sensor with different types of magnetic concentrators – closed-core (of rectangular and toroidal type) and open-core of toroidal type – with additional larger air gap. The Hall plate is also included in the model with its real dimensions and the magnetic flux density is obtained by integrating over its volume.
Findings
It has been found that there is dependence of the output signal (proportional to the magnetic flux density) of Hall effect based current sensor with both closed- and open-core magnetic concentrators on the position of the current carrying conductor. Distribution of the magnetic flux density and dependencies of its value in the Hall plate on the conductor position and on the additional air gap have been obtained. Optimization is carried out with respect to the additional air gap and cross-section dimensions of the concentrator.
Originality/value
Estimation of the influence of the introducing magnetic concentrators is made with respect to relationships between the output signal and conductor position for different constructions of the magnetic core of the concentrators.
Details
Keywords
This article examines the effect of party composition of government on the centralization of budgeting institutions in Hungary, Poland, the Czech Republic and Bulgaria in…
Abstract
This article examines the effect of party composition of government on the centralization of budgeting institutions in Hungary, Poland, the Czech Republic and Bulgaria in 1989-1999, and assesses the impact of the centralization of budgeting institutions on the capacity of these countries to meet the fiscal deficit requirement for the European Economic and Monetary Union (EMU) membership. The article finds that centralization of budgeting institutions through delegation to a strong finance minister and/or prime minister is likely to occur in one-party governments or coalition governments composed of parties which expect to fight repeated elections together, with effective punishment mechanisms. The article finds that countries with centralized budgeting institutions are likely to be more capable of meeting the EMU deficit requirement than countries with decentralized institutions.
BULGARIA: New BNB chief will not end controversies