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The DC-biased magnetization is often occurring in electromagnetic devices running process, such as the power transformer, iron core reactor and other high-voltage electrical equipment [1]. However, There are three main kinds of traditional offline measuring methods under dc-biased magnetization: Epstein Frame, Ring Test and Single Sheet Measurement. The important limitation of the three aforementioned...
The split ratio, i.e., the ratio of stator bore radius to stator outer radius, is an important design parameter for permanent-magnet (PM) linear machines, as it significantly influences the thrust force capability and efficiency. The optimal split ratio for maximum thrust force is investigated analytically for both surface-mounted PM (SPM) and interior PM (IPM) E-core linear oscillating actuators...
An improved analytical model is developed to predict the electromagnetic performance of a single-phase tubular oscillating permanent magnet actuator. The analytically predicted thrust force, flux-linkage and back-EMF coefficient of an actuator equipped with a quasi-Halbach magnetized mover are compared with results deduced from finite element analyses and measurements. In addition, the influence of...
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