A Type of Subsection Model for a Permanent Magnet Bar and its Leakage Permeance Calculation Method in an Open Magnetic Circuit

Abstract

The equivalent model of a permanent magnet (PM) plays an important role in electromagnetic system calculation. A type of subsection model for a PM bar is established, to improve the accuracy of the traditional equivalent circuit method. The mathematical expression, and its end verification condition, are presented. Based on the analytical method and finite element method, the leakage permeance calculation of a PM bar in an open magnetic circuit is investigated. As an example, for a given certain type of PM bar, the magnetic flux of each section is validated by experiment, and by simulation. This model offers a foundation for building a high accuracy equivalent magnetic PM model in an electromagnetic system.

The Permanent Magnet Based Reluctance Modulated VLF Transmitter: An Equivalent Circuit Analysis

“…The model should include all leakages and fringing fluxes in the closed-loop structure, plus leakage fluxes contribute to PM. Specifically, the leakage fluxes of PM (fluxes closed into PM) should be adequately discretized using the subsection method [6] to track the variation of flux path in PM and its surrounding medium. This tracking assists in calculating the released dynamic energy of PM, which contributes to modulation.…”

Structure classification of electromagnetic relays and comparison of typical magnetic system containing permanent magnet

“…The magnetic system with permanent magnet which has following characters can be called the "polarized magnetic system" [10][11] :…”

A type of 2D magnetic equivalent circuit framework of permanent magnet for magnetic system in AEMR

“…Some work about PM division method which are different from traditional MEC has also been studied. 19,20 In this paper, a type of two-dimension magnetic equivalent circuit framework of permanent magnet model (2D MECF) is established, the element is defined and the solution procedure of this model is analyzed; by a case study of the electromagnetic system of a certain type AEMR, the electromagnetic system calculation model is established based on 2D MECF and the static force at different rotation angles is calculated; traditional lumped parameter model and FEM model are built to verify the validity.…”