A high space-filling rate large-current filtering magnetic assembly and a vehicle-mounted electromagnetic compatibility filter

Abstract

The application provides a high-space-filling high-current filtering magnetic assembly and a vehicle-mounted electromagnetic compatibility filter, and aims to solve the problem of magnetic flux crowding and local hot spots caused by rectangular magnetic core elements or the problem of wasted space and low performance caused by a large invalid air gap between a circular magnetic core element and a flat busbar when the flat busbar and the magnetic core element are assembled. In the application, the ratio of the thickness to the height of the main section of the conductive busbar is within [0.8, 1.3], and each outer side edge of the main section extending in the longitudinal direction is provided with an edge modification transition structure. The magnetic core element is provided with a closed aperture with a continuous and smooth inner curved surface and without geometric sharp angle characteristics. The magnetic core element is sleeved on the main section, and the surface of the edge modification transition structure is in close contact or fitting with the inner curved surface of the closed aperture. In the application, the conductive busbar is adapted to the smooth magnetic core element without sharp angles, the effective cross-sectional area and shape factor of the magnetic core element are maximized, and the filtering impedance performance under high-frequency and high-current working conditions is improved.

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