Analytical magnetic field calculation for flat permanent-magnet linear machines with dual-rotor by using improved two-dimensional hybrid analytical method

International audience<div class="intent_sub_item Abstract__block mb-3"&gt <h3 class="intent_sub_title Abstract__block__title mb-1 mt-1"&gtPurpose</h3&gt <section class="intent_sub_content Abstract__block__text"&gt <p&gtThis paper aims to propose an improved two-dimensional hybrid analytical method (HAM) in Cartesian coordinates, based on the exact subdomain technique and the magnetic equivalent circuit (MEC).</p&gt </section&gt </div&gt <div class="intent_sub_item Abstract__block mb-3"&gt <h3 class="intent_sub_title Abstract__block__title mb-1"&gtDesign/methodology/approach</h3&gt <section class="intent_sub_content Abstract__block__text"&gt <p&gtThe magnetic field solution is obtained by coupling an exact analytical model (AM), calculated in all regions having relative permeability equal to unity, with a MEC, using a nodal-mesh formulation (i.e. Kirchhoff’s current law) in ferromagnetic regions. The AM and MEC are connected in both axes (<em&gtx</em&gt, <em&gty</em&gt) of the (non-)periodicity direction (i.e. in the interface between the tooth regions and all its adjacent regions as slots and/or air-gap). To provide accuracy solutions, the current density distribution in slot regions is modeled by using Maxwell’s equations instead of the MEC characterized by an equivalent magnetomotive force (MMF) located in slots, teeth and yokes.</p&gt </section&gt </div&gt <div class="intent_sub_item Abstract__block mb-3"&gt <h3 class="intent_sub_title Abstract__block__title mb-1"&gtFindings</h3&gt <section class="intent_sub_content Abstract__block__text"&gt <p&gtIt is found that whatever the iron core relative permeability, the developed HAM gives accurate results for no- and on-load conditions. The finite-element analysis demonstrates excellent results of the developed technique.</p&gt </section&gt </div&gt <div class="intent_sub_item Abstract__block"&gt <h3 class="intent_sub_title Abstract__block__title mb-1"&gtOriginality/value</h3&gt <section class="intent_sub_content Abstract__block__text"&gt <p&gtThe main objective of this paper is to make a direct coupling between the AM and MEC in both directions (i.e. <em&gtx</em&gt- and <em&gty</em&gt-edges). The current density distribution is modeled by using Maxwell’s equations instead of the MEC and characterized by an MMF.</p&gt </section&gt