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Multi-input filter

A filter, multi-input technology, applied in the field of filters, can solve the problems of large box space, filter failure, increase the total cost of products, etc., to save box space, reduce total cost, and overcome the problem of filter failure. Effect

Inactive Publication Date: 2012-02-22
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The disadvantage of the existing solution is that multiple channels of battery board input require multiple channels of filters, often requiring a large box space
Moreover, the filter cost is relatively high, and multiple filters will inevitably increase the total cost of the product
When the PV panels are connected in parallel at the input end, there is also the problem of filter failure caused by the uneven flow of the two MPPTs

Method used

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Embodiment Construction

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0017] An embodiment of the present invention provides a multi-input filter. Please refer to figure 2 , figure 2 A block diagram of one embodiment of the multi-input filter of the present invention is provided. The filter includes: a magnetic core 201, a plurality of positive coils 205 corresponding to multiple inputs, and the plurality ...

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Abstract

The invention provides a multi-input filter which is used for filtering multi-path input electric energy. The filter comprises a magnetic core, a plurality of positive electrode coils corresponding to a plurality of paths of inputs, and an integration negative electrode coil corresponding to the plurality of positive electrode coils, wherein the plurality of the positive electrode coils and the integration negative electrode coil are wound on the magnetic core; and an induction relation is formed between the integration negative electrode coil and the plurality of positive electrode coils. In the embodiment of the invention, as the integration negative electrode coil is wound on the magnetic core, a space of a box body is saved and the total cost of the filter is reduced by reducing the number of the magnetic cores.

Description

technical field [0001] The invention relates to a filter, in particular to a multi-input filter, a filter configuration method and a solar inverter system including a multi-input filter. Background technique [0002] In a solar inverter, there are often multiple maximum power point trackers (Maximum Power Point Tracking, MPPT), and each tracker corresponds to a photovoltaic (PV) panel input. In order to suppress the electromagnetic interference (Electro Magnetic Interference, EMI) of the inverter, it is necessary to add an electromagnetic interference filter (EMI filter) at the input end. The existing technology is usually to add a filter. [0003] When the input ends are connected in parallel, the prior art also has the problem of filter failure caused by uneven current flow of the two inputs. Please refer to figure 1 , figure 1 A structure diagram of a two-way filter in the prior art is provided. If I 1 = 5A, I 2 =-4A, I 3 =5A, 46A, the two input currents are uneve...

Claims

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Application Information

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IPC IPC(8): H02M1/44H01F17/04
Inventor 李泉
Owner HUAWEI TECH CO LTD