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Electromagnetic-interference self-adaptive filter

An adaptive filter, relay switch technology, applied in harmonic reduction devices, AC networks to reduce harmonics/ripples, etc., can solve the problem of inability to automatically adapt to new products, waste of time and resources, filter Not applicable, etc.

Pending Publication Date: 2017-05-31
青岛中公联信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When designing a new product, the original filter is no longer applicable or not the optimal solution, and it needs to be redesigned, resulting in a waste of time and resources
Moreover, after the design is completed, further adjustments are required, and it is impossible to automatically adapt to new products.

Method used

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  • Electromagnetic-interference self-adaptive filter
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  • Electromagnetic-interference self-adaptive filter

Examples

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Embodiment Construction

[0016] Below, the substantive features and advantages of the present invention will be further described in conjunction with examples, but the present invention is not limited to the listed examples.

[0017] like Figure 5 As shown, an adaptive filter includes:

[0018] Two input terminals L, N, two output terminals; there is an adjustable common mode choke coil (adjustable common mode inductance) L1_1 between the two input terminals L and N, and the adjustable common mode choke coil L1_1 The input side is sequentially connected in parallel with the front Y capacitor circuit, the front X capacitor circuit and the front discharge resistor circuit from the current input direction to the output direction; the front Y capacitor circuit includes the front adjustable Y capacitors CY1_1 and CY1_2 connected in series, and the front adjustable capacitor CY1_1 After being connected in series with CY1_2, one end is connected to the front adjustable Y capacitor relay switch s2_1 to the ...

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PUM

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Abstract

The invention relates to a self-adaptive filter. The electromagnetic-interference self-adaptive filter is formed by multiple fuses, X-capacitor, Y-capacitor, an adjustable co-mode inductor and relay, switching can be performed in various device parameters and circuit structures by using the relay, an ARM chip and a PC terminal can be communicated controllably, switching of the relay can be controlled by means of polling when one group of multiple groups of circuit parameters and structures do not meet electromagnetic compatibility standard, and different products can be automatically adapted.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic interference filters, and in particular relates to an adaptive electromagnetic interference filter. Background technique [0002] Electromagnetic compatibility includes two aspects of EMI and EMS, and the controller should fully consider electromagnetic compatibility when designing. But because the application objects and conditions are not single, further debugging is required after the design is completed. A commonly used method in the EMI rectification process is to add an EMI filter in front of the controller. The commonly used EMI filter is composed of a fuse, X capacitor, common mode inductor, Y capacitor, discharge resistor, etc., such as Figure 1-4 Four different EMI filter circuits are shown. After the design of these EMI filter circuits is completed, the parameters and filter structures of fuses, capacitors, inductors, and resistors are determined and cannot be changed. [0003...

Claims

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Application Information

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IPC IPC(8): H02J3/01
CPCH02J3/01Y02E40/40
Inventor 马培元孙强
Owner 青岛中公联信息科技有限公司