Electronic device and filter inductor thereof
A technology for filtering inductors and electronic equipment, which is applied in the direction of transformer/inductor core, inductor/transformer/magnet manufacturing, circuits, etc., and can solve the problem that the overall volume of high-power power modules cannot be reduced.
Active Publication Date: 2020-06-16
SIEMENS AUTOMOTIVE EPOWERTRAIN SYST SHANGHAI CO LTD
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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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[0031] The substantive features and advantages of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the listed embodiments.
[0032] Figure 2a , Figure 2b with Figure 2c Each is a schematic cross-sectional view of a filter inductor 200 of the first embodiment of the present invention. The filter inductor 200 is disposed at an input end of an electronic device, such as a high-power power supply module of a high-power power system, and has a plurality of magnetic cores for eliminating noise and electromagnetic interference in a full frequency range. At least two of the magnetic cores are made of different magnetic materials. Preferably, the electronic device is an inverter.
[0033] In this embodiment, the plurality of magnetic cores of the filter inductor 200 include a first magnetic core 22 and a second magnetic core 55, and the second magnetic core 55 has a ...
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The invention relates to electronic device and a filter inductor (200). The filter inductor can be arranged at one input end of the electronic device; the filter inductor (200) comprises a plurality of magnetic cores and at least one conductor; the plurality of magnetic cores comprise a first magnetic core (22) and a second magnetic core (55); and the at least one conductor is embedded into the first magnetic core (22); the second magnetic core (55) is provided with a hollow part for accommodating the first magnetic core (22); the first magnetic core (22) is made of a first magnetic material;the second magnetic core (55) is made of a second magnetic material; and 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 for electromagnetic interference (EMI) of the International Special Committee on Radio Interference (CISPR, formerly known as Comité International Spécial des Perturbations Radioélectriques in French) in the entire frequency range or at least in some frequency ranges and other standards, especially in 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 power module to filter out common-mode (CM for short) an...
Claims
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Login to View More IPC IPC(8): H01F27/24
CPCH01F27/24H01F41/02
Inventor 沈唐兵李双佳单亮
Owner SIEMENS AUTOMOTIVE EPOWERTRAIN SYST SHANGHAI CO LTD