Modeling method, device and system of electromagnetic interference of DC brush motor

Abstract

The invention provides a modeling method, device and system of the electromagnetic interference of a DC brush motor. The method includes the steps of obtaining target measurement data corresponding tomodel parameters of an equivalent circuit model, wherein the equivalent circuit model is a model established based on electromagnetic interference generated by the DC brush motor, and the model parameters include common-model admittance parameters, different-model admittance parameters and current parameters of a current source; determining model parameters of the equivalent circuit model based on the target measurement data, and obtaining the equivalent circuit model with the model parameters to serve as the model of the electromagnetic interference of the DC brush motor. The modeling methodis simple, high in universality and engineering practicability and beneficial for predicting, analyzing, and improving the electromagnetic compatibility, improving the research and development efficiency and reducing the development cost in the design and development process; the established electromagnetic interference model can be used as a component in analysis of the electromagnetic compatibility of an electronic and electric system with the DC brush motor, and the system-grade electromagnetic compatibility design efficiency can be easily improved.

Description

technical field [0001] The invention relates to the technical field of electromagnetic interference modeling, in particular to a modeling method, device and system for electromagnetic interference of a DC brushed motor. Background technique [0002] A brushed DC motor is a rotating electrical machine with a built-in brush device that can convert DC electrical energy into mechanical energy or convert mechanical energy into DC electrical energy. Different from brushless DC motors, brush devices are used to introduce or extract DC voltage and DC current. DC brushed motor is the basis of all motors. It has the characteristics of fast start, timely braking, smooth speed regulation in a wide range, and relatively simple control circuit. [0003] However, the current changes and sparks caused by the commutation of DC brushed motors during operation will cause more obvious electromagnetic interference, which makes it an important source of electromagnetic interference in electronic...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a modeling method, device and system for electromagnetic interference of brushed DC motors, which are used to solve the limitations of the modeling methods in the prior art, which are only applicable to some motors and do not have universality. Moreover, modeling requires a large number of inputs such as circuit diagrams, wiring diagrams, detailed device parameters, and structural digital models. Any input deviation will affect the accuracy of the model. The modeling process is cumbersome, the cycle is long, and the engineering practicability is low. The scheme is as follows:

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