Method for rapidly evaluating electromagnetic disturbance under dynamic working conditions of electric vehicle

Abstract

The invention relates to a method for rapidly evaluating electromagnetic disturbance under dynamic working conditions of an electric vehicle. The method includes the steps of A, enabling the vehicle to be driven on a dynamometer and undergo a series of working conditions, and at a sampling frequency of not lower than 5 Hz, synchronously collecting a drum linear speed of the dynamometer and time-domain data of drum force as well as time-domain signals in a vertical direction of an electric field and three orthogonal directions of a magnetic field and conducted emission time-domain signals, wherein the drum speed of the dynamometer is equal to a vehicle speed under the condition that wheels don't slip; B, transforming the time-domain signals in the vertical direction of the electric field and the three orthogonal directions of the magnetic field and the conducted emission time-domain signals into frequency-domain signals of corresponding time points in real time through a fast Fourier transform algorithm and displaying the frequency-domain signals as a waterfall plot; C, displaying the drum linear speed of the dynamometer and the time-domain data of the drum force correspondingly to the frequency-domain signals of the time points corresponding to the vertical direction of the electric field, the three orthogonal directions of the magnetic field and conducted emission through a data fusion algorithm. The method is capable of evaluating the real conditions of the electromagnetic disturbance of the electric vehicle more reliably.

Description

technical field [0001] The invention relates to a method for testing electromagnetic disturbances of automobiles, in particular to a method for rapidly evaluating electromagnetic disturbances under dynamic working conditions of electric vehicles. Background technique [0002] With the rapid development of the automobile industry and electronic technology, more and more new technologies have been widely used in traditional automobiles, especially microelectronic technology, which has more powerfully promoted the development of the automobile industry in the direction of high added value. The application of these new technologies also has an impact on the electromagnetic disturbance emitted by the entire vehicle system, and the test methods for traditional vehicle electromagnetic disturbance are gradually incapable. [0003] Compared with traditional motor vehicles, electric vehicles differ mainly in power source, drive system and control system. As electric vehicles use more...

AI Technical Summary

Problems solved by technology

At present, in the domestic automobile electromagnetic disturbance test standard GB/T 18387-2008, only the electromagnetic disturbance evaluation method of the automobile steady state condition is provided, that is, the automobile is required to maintain a certain speed, but the steady state condition i

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