Magnetic circuit

About: Magnetic circuit is a research topic. Over the lifetime, 15707 publications have been published within this topic receiving 118099 citations.

Analysis of orthogonal-core type linear variable inductor and application to VAr compensator

Abstract: This paper presents a quantitative analysis of the orthogonal-core type linear variable inductor. The orthogonal-core has wedge gaps for reduction of harmonics of the output currents. The analysis is based on a 3-dimensional nonlinear magnetic circuit of the orthogonal-core. Using the magnetic circuit, one can calculate accurately the operating characteristics of the variable inductor. Furthermore, they develop a VAr compensator for a 6.6 kV AC distribution system using the three-phase variable inductor.

Comparison of soft magnetic composites (SMCs) and electrical steel

Abstract: This paper deals with a comparison of soft magnetic composites (SMCs) and electrical steel. At first the theory and practice of measuring of the magnetic properties with the ring core method are described. Next a comparison between electrical steel and SMC regarding different frequencies, flux densities and magnetic field strengths is given. The measurements have shown that SMCs have less iron losses, i.e. mainly hysteresis and eddy current losses, for high frequencies due to their low electrical conductivity. However the magnetic permeance of SMCs is less than that of electrical steel and consequently a higher magnetic field strength and thus a higher current is needed to obtain the same magnetic flux density. Since higher current increases the ohmic losses, an estimation of the total losses, i.e. the sum of iron and ohmic losses is given at the end.

Research on switched reluctance double-rotor motor used for hybrid electric vehicle

Abstract: In this paper, switched reluctance machine based double-rotor machine (SRDRM) is proposed. It is a kind of new structure electric machine with two electrical ports and two mechanical ports. Firstly, this paper presents the working principle of SRDRM, builds an equivalent magnetic-network model based on its magnetic structure, and establishes the theoretical analysis and computation fundamental. Secondly, a 2-D finite-element model (FEM) of SRDRM is built and the influence of the magnetic coupling between the outer motor and inner motor is analyzed.

Color cathode ray tube

Abstract: PROBLEM TO BE SOLVED: To prevent the mis-landing of an electron beam caused due to the effect of geomagnetism by forming a heat shrinkable band, fastening an outer edge near a panel face with a silicon steel plate specified with the values of the external magnetic field and relative magnetic permeability, when fitted to a color cathode-ray tube. SOLUTION: A heat shrinkable band 1 used for a color cathode-ray tube is made of a silicon steel plate, having a relative magnetic permeability of 400 or above in the external magnetic field of 0.3 Oe, when it is installed. The heat shrinkable band 1, made of a magnetic material having high magnetic permeability, forms a single-turn magnetic circuit containing a plane formed by a panel section 2 and an aperture grille, it is coupled with the magnetic field formed by a coil 11, and it induces new magnetic field in the nearly vertical direction to the plane formed by the panel section 2 and the aperture grille over the entire panel. The effect of geomagnetism is corrected over the entire panel with this action, and the geomagnetism drift due to geomagnetism is suppressed.