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A Design Method of Electromagnetic Interference Filter for High Voltage Power Supply

A filter design, electromagnetic interference technology, applied in design optimization/simulation, electrical components, output power conversion devices, etc., can solve the problem that EMI filters cannot meet the needs of the new energy vehicle field, and achieve large insertion loss. Effect

Active Publication Date: 2021-05-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

Existing methods cannot meet the requirements of large current, wide frequency band, and large insertion loss corresponding to the working conditions of new energy vehicles. Therefore, the existing EMI filter design methods cannot meet the needs of the field of new energy vehicles.

Method used

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  • A Design Method of Electromagnetic Interference Filter for High Voltage Power Supply
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  • A Design Method of Electromagnetic Interference Filter for High Voltage Power Supply

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Embodiment Construction

[0040] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, but not all of them. 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.

[0041] The method for designing an electromagnetic interference filter for a high-voltage power supply provided by the present invention is suitable for high-voltage and low-voltage DC converters of new energy vehicles, and the method specifically includes the following steps:

[0042] Step 1. Based on the test results of conducted interference on the high-voltage DC side of the high-voltage and low-voltage DC-DC converter of the new energy vehicle, obtain the common-mode interference voltage separately, and de...

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Abstract

The invention provides a design method of a high-voltage power supply electromagnetic interference filter, which is mainly suitable for high and low voltage DC converters of new energy vehicles. It can not only realize the design of filter element parameters, but also can Size, voltage size, limit requirements and space size, etc., rationally adjust the filter structure and component parameters, so that the filter can better match the needs of high and low voltage DC-DC converters. The filter designed by the present invention can achieve larger insertion loss in the 150kHz-108MHz frequency band, and is more suitable for the suppression requirement of conduction interference on the high-voltage DC side of the high-voltage DC-DC converter of the new energy vehicle. Using the leakage inductance of the common mode choke coil and the equivalent X capacitor connected in series with the Y capacitor as the differential mode filter circuit, while mainly considering the suppression of the common mode conducted interference, it also takes into account the suppression of the differential mode conducted interference, and improves the power of the filter density.

Description

technical field [0001] The invention relates to the technical field of electromagnetic interference (EMI) filtering, in particular to a filter design method for electromagnetic interference of a high-voltage DC power supply in a high-voltage DC converter of a new energy vehicle. Background technique [0002] At present, high and low voltage DC converters (DC-DC converters) generally use power semiconductor devices (such as MOSFETs) for pulse width modulation (PWM) control. In order to suppress the electromagnetic interference caused by power semiconductor devices, high and low voltage DC-DC Installing an EMI filter on the high-voltage DC power line of the converter is a more effective method. Existing methods cannot meet the requirements of large current, wide frequency band, and large insertion loss corresponding to the working conditions of new energy vehicles. Therefore, the existing EMI filter design methods cannot meet the needs of the field of new energy vehicles. Co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/44G06F30/20
CPCH02M1/44
Inventor 胡桂兴翟丽区健昌吕梦圆高洪民
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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