Building method for common mode EMI model and equivalent circuit of complete train of high-speed motor train unit

Abstract

The invention discloses a building method for a common mode EMI model and an equivalent circuit of a complete train of a high-speed motor train unit. The method comprises the steps of establishing anEMI model graph of the complete train; establishing an EMI model graph of a traction converter; establishing an equivalent circuit graph of a common mode EMI loop caused by a potential point A of a rectifier bridge of the high-speed motor train unit, and then according to the equivalent circuit, calculating out a conducted EMI current; and establishing the equivalent circuit after passing the converter, and then according to the equivalent circuit, calculating out the conducted EMI current. The model and the equivalent circuit in the method describe common mode EMI characteristics of the complete train of the high-speed motor train unit, wherein the common mode EMI characteristics include common mode ground capacitance distribution, a cable high-frequency model, and high-frequency parasitic characteristics of transformer primary and secondary sides. The model and the equivalent circuit predict the common mode EMI characteristics of the complete train and serve as technical means of research on common mode EMI of the high-speed motor train unit; the equivalent circuit obtains a mathematic expression of a common mode EMI current; and the expression predicts the magnitude of the common mode EMI current of the complete train.

Description

technical field [0001] The invention belongs to the technical field of high-speed rail transit, and relates to a method for establishing a common-mode EMI model of a whole vehicle of a high-speed EMU and an equivalent circuit thereof. Background technique [0002] With the development of China's high-speed rail technology, its electromagnetic compatibility problem is becoming more and more serious. In the analysis of EMI problems of high-speed EMUs, there is no EMI model and equivalent circuit of the whole vehicle, and the EMI characteristics of the whole vehicle cannot be identified, nor can it be analyzed EMI issues, not to mention the vehicle common mode EMI model and equivalent circuit for the analysis of vehicle common mode EMI. Therefore, based on the above problems, the present invention proposes a method for establishing a common-mode EMI model and an equivalent circuit of a high-speed EMU. Based on the proposed method for establishing the common-mode EMI model and ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for establishing a common-mode EMI model and an equivalent circuit of a high-speed train set, which solves the problem that there is no support for a common-mode EMI model and an equivalent circuit for a high-speed train set in the process of researching the EMI characteristics of a high-speed train set problem, and also solves the problem that the common mode EMI characteristics cannot be described by mathematical expressions

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