Sound wave simulation method for driving motor

Abstract

The invention relates to a sound simulation method for a driving motor, which comprises the following steps: acquiring the running state of a vehicle in real time, including the current speed of the vehicle and the rotating speed of the driving motor; a plurality of harmonic currents are actively injected into a control signal of the motor according to the running state of the vehicle; the harmonic current flows through a stator winding of the driving motor and generates an alternating magnetic field in an air gap between a stator and a rotor, the alternating magnetic field generates alternating electromagnetic force, the alternating electromagnetic force acts on a stator and a shell of the driving motor to generate low-frequency vibration, and then sound is radiated; the low-frequency vibration made sound is changed by changing the multiple harmonic currents, so that modulation sound is obtained through modulation, and the modulation sound is used for simulating sound waves made by a fuel engine. Compared with the prior art, the driving motor is made to emit low-frequency modulation sound, so that sound of a fuel engine is simulated, linkage of back pushing feeling and sound waves is achieved, and the driving feeling of a new energy automobile is improved acoustically.

Description

technical field [0001] The present invention relates to the technical field of driving motor control, in particular to a sound wave simulation method for driving a motor. Background technique [0002] The drive motor system of new energy vehicles has higher speed and higher noise frequency than the engine of fuel vehicles, but the noise amplitude is smaller. People who own fuel vehicles cannot adapt well to the driving environment of new energy vehicles, which also reduces the fun of driving for many car enthusiasts. The lack of the roar of the engine also poses a safety risk to nearby passers-by. [0003] At present, additional speakers are usually used in new energy vehicles to simulate the sound waves of the fuel engine of fuel vehicles, which not only requires additional circuits, speakers or audio memory, resulting in higher production costs, but also the simulated sound waves usually occur in the car. Realism affects user experience. SUMMARY OF THE INVENTION [00...

AI Technical Summary

Problems solved by technology

[0003] At present, new energy vehicles usually use additional speakers to simulate the sound waves of fuel vehicles. Not only does it need to add additional circuits, speakers or audio memory, resulting in higher production costs, but also the simulated sound waves usually occur in the car. Realism, affecting user experience

Images