Topic
Magnetic core
About: Magnetic core is a research topic. Over the lifetime, 30011 publications have been published within this topic receiving 155247 citations.
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Patent•
05 Jun 1981
TL;DR: An amorphous magnetic alloy has a general formula: (Fe1-a.Nia)100-x-y.By where 0.2≦a≦0.7 1≦x≦20 5≦y≦9.5 15−x+y ≥ 29.6 as mentioned in this paper.
Abstract: An amorphous magnetic alloy has a general formula: (Fe1-a.Nia)100-x-y.Six.By where 0.2≦a≦0.7 1≦x≦20 5≦y≦9.5 15≦x+y≦29.5 The alloy is low in iron loss and suitable for forming a magnetic core used under a high frequency.
39 citations
Patent•
25 May 196139 citations
11 Mar 1990
TL;DR: In this article, a multidimensional minimum search algorithm was used to design the smallest transformer and determine the optimum number of turns, winding space allocation, and size of the magnetic core.
Abstract: A computer-aided tool for design and analysis of high-frequency power transformers has been developed The program uses a multidimensional minimum-search algorithm to design the smallest transformer and determine the optimum number of turns, winding space allocation, and size of the magnetic core The design specifications include current and voltage waveforms, desired core shape and material, type of winding (Litz wire, solid wire, or foil), and primary and secondary winding arrangement The program also calculates the core loss and computes the winding loss distribution, taking into account proximity and skin effects An experimental transformer was designed for a 75 W offline zero-current quasi-resonant converter to verify the calculations >
39 citations
12 Nov 2012
TL;DR: In this article, a novel integrated magnetic structure suitable for the transformer-linked interleaved boost chopper circuit is proposed, which reduces fringing effect and the effects leads to complication of magnetic design.
Abstract: A novel integrated magnetic structure suitable for the transformer-linked interleaved boost chopper circuit is proposed in this paper. The coupled inductor is known to be effective for miniaturization in high coupling area because the DC flux in the core can be canceled and the inductor current ripple become to high frequency. However, coupled inductor with E-E core and E-I core are realistically difficult to obtain necessary leakage inductance in high coupling area. The cause is fringing effect and the effects leads to complication of magnetic design. To solve this problem, novel integrated magnetic structure with reduction of fringing flux and high frequency ripple current performance, is proposed. Furthermore, the design method for novel integrated magnetic structure suitable for coupled inductor is proposed from analyzing of the magnetic circuit model. Finally, effectiveness of reduction of fringing flux and design method for novel coupled inductor are discussed from experimental point of view.
39 citations
28 Sep 1991
TL;DR: In this article, the electrostatic properties of inductors and transformers are investigated based on a simple electrostatic model and an equivalent circuit is proposed to take electrostatic phenomena into account.
Abstract: The electrostatic properties of inductors and transformers are investigated. Two devices have been built on the same magnetic core. Both are cylindrical coaxial winding transformers and all the windings are almost identical. These one-layer windings are rolled in the same direction for one transformer and in opposite direction for the other. All the possible connections of the two windings are tested. Based on a simple electrostatic model, these devices are analytically studied and an equivalent circuit is proposed to take electrostatic phenomena into account. Then, an electromagnetic simulation software is used to compute the electrostatic field with the real shapes of wires and coil layers. Capacitances are deduced from stored electrostatic energy in the whole space. Finally, many impedance measurements from 100 Hz to 40 MHz allow the equivalent circuit to be validated.
39 citations