Fault diagnosis method and application of electric vehicle driving motor

Abstract

The invention discloses a fault diagnosis method and application of an electric vehicle driving motor, and belongs to the technical field of vehicle monitoring. In order to solve the problem that prediction maintenance, online health detection and the like cannot be realized in the conventional electric vehicle motor driving, the invention provides a fault diagnosis method, which comprises the following steps: firstly, analyzing a fault formation mechanism of an electric vehicle driving motor; secondly, establishing a mathematical model and a fault mechanism theory, and establishing a relationship between the electric vehicle driving motor fault and a measurable signal and a calculation method; and then measuring the magnetic field and port parameters of the electric automobile in real time. And carrying out data analysis, and dynamically updating the built part health model to realize the detection of the state of the motor so as to provide a decision. Giant magnetoresistance and the long-period fiber grating sensing technology are combined for the first time and applied to fault diagnosis of the electric vehicle, full-life-cycle motor state monitoring is achieved, the operation and maintenance cost of the vehicle can be reduced, and the reliability and intelligence of an electric drive system of the electric vehicle are improved.

Description

technical field [0001] The invention relates to the technical field of vehicle monitoring, in particular to a fault diagnosis method and application of an electric vehicle drive motor. Background technique [0002] The vigorous development of the current electric vehicle industry has promoted the upgrading of the upstream and downstream industries of the motor and the overall manufacturing industry. In the Made in China 2025 plan, it is clearly proposed to focus on the development of intelligent equipment and intelligent products and the development plan of Industry 4.0, which requires further improvement of the level of condition monitoring of my country's industrial equipment, the rapid development of new energy vehicles, and the promotion of the transformation and upgrading of the automobile industry. [0003] In the application of electric vehicles, the motor is the core executive component of the drive system. Therefore, its failure will cause serious consequences: ran...

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Problems solved by technology

[0007] Aiming at the problems that the existing electric vehicle motor drive system lacks fault diagnosis and state monitoring methods, the diagnostic effect is not good, and predictive maintenance and online health detection cannot be realized, the present invention provides a fault diagnosis method and application of electric vehicle drive motors, through Rapid online monitoring can realize the detection of existing faults and the prediction of future faults

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