Electronic equipment and its filter inductors

Abstract

The present invention relates to an electronic device and a filter inductor (filter inductor) (200), which can be installed at an input end of an electronic device; the filter inductor (200) includes a plurality of magnetic cores and at least one Conductor, the plurality of magnetic cores include a first magnetic core (22) and a second magnetic core (55), wherein the at least one conductor is embedded in the first magnetic core (22); the second magnetic core (55) There is a hollow part for accommodating the first magnetic core (22), wherein the first magnetic core (22) is made of a first magnetic material, and the second magnetic core (55) is made of a second magnetic The second magnetic material is different from the first magnetic material.

Description

technical field [0001] The present invention relates to an electronic device, in particular to a filter inductor of an electronic device. Background technique [0002] A high power power system usually has a high power power module, such as a converter module or an inverter module. This type of power module usually cannot meet the regulatory standards and regulations of the International Special Committee on Radio Interference (CISPR, formerly known as Comité International Spécial des Perturbations Radioélectriques) for electromagnetic interference (electromagnetic interference, referred to as EMI) in the entire frequency range or at least in some frequency ranges. Other standards, especially within a frequency range and / or a high frequency range required by a drive system of an electric vehicle (EV) or a hybrid electric vehicle (HEV). Therefore, multiple filter inductors with different magnetic materials need to be installed at the input end of this type of high-power powe...

AI Technical Summary

Problems solved by technology

If the material of the magnetic core 26 is MnZn ferrite (MnZn ferrite), the filter inductor 100 can only be used in a low frequency range (for example, between 1K and 30MHz) due to its high magnetic permeability. Used to Attenuate Common-Mode and Differential-Mode Noise in This Low-Frequency Range

On the contrary, if nickel-zinc ferrite (NiZn ferrite) is selected as the material of the magnetic core 26, the filter inductor will not The converter 100 can only be used to attenuate common mode and differential mode noise and eliminate electromagnetic interference in this high frequency range

[0006] Therefore, in order to be able to eliminate common-mode and differential-mode noise and electromagnetic interference in a full frequency range (that is, covering the above-mentioned low-frequency range and the high-frequency range), only a single filter inductor of the prior art cannot However, multiple filter inductors using different magnetic materials must be installed at the input end of the high-power power module; in addition, the multiple filter inductors occupy a certain space inside the high-power power module, so that In terms of product design planning, the overall volume of the high-power power module cannot be reduced

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