A driving motor optimization method and system based on sound quality

Abstract

The present invention provides a driving motor optimization method and system based on sound quality, including the following steps: noise signal collection: collecting motor noise samples; establishment of sound quality prediction module: performing subjective evaluation and psychoacoustic objective evaluation on the collected motor noise samples Parameter calculation, establishment of motor sound quality prediction model; identification of sound quality sensitive frequency bands: determine the frequency bands that are positively correlated with motor sound quality, analyze and calculate the sensitivity coefficient of each frequency band, and determine the motor sound quality sensitive frequency bands; motor sound quality optimization: Analyze the excitation source corresponding to the sensitive frequency band of motor sound quality, that is, the structural parameters and control parameters of the motor, and optimize the structural parameters and control parameters of the motor to improve the sound quality of the motor. The invention uses the sound quality as the motor noise evaluation index, which can reflect people's subjective perception of the motor noise, and is more in line with the human ear's auditory perception of the motor noise.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to a sound quality-based motor optimization method and system for new energy vehicles. Background technique [0002] The NVH performance of a car is an important indicator that must be considered for an electric car. Compared with a traditional car, it uses an electric motor instead of an engine as a power source, and relies on the large speed regulation area and wide torque range characteristics of the electric motor to achieve multiple tasks. condition driving. The drive motor system is one of the three core systems of electric vehicles and the main drive system for driving the vehicle. Its characteristics determine the main performance indicators of the vehicle and directly affect the vehicle's power, economy and user driving experience. [0003] The requirements of wide speed regulation, high torque traction characteristics and small size and lightweight...

AI Technical Summary

Problems solved by technology

[0004] However, the current domestic and foreign research on the electromagnetic vibration and noise of motors is only limited to reducing the amplitude of electromagnetic force and noise sound pressure level, without considering the sound quality of motors

The goal of traditional motor noise research is to reduce the sound pressure level or sound power level, which only represents noise energy and cannot fully reflect human subjective feelings

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