Do New Energy Vehicles Produce Significant Current Noise During Acceleration?
1 Answers
Different new energy vehicles exhibit varying noise levels. Pure electric vehicles generally do not emit any sound while driving, except for some models that simulate the acceleration sound of traditional fuel-powered vehicles. New Energy Vehicles: New energy vehicles encompass four major types: Hybrid Electric Vehicles (HEV), Battery Electric Vehicles (BEV, including solar-powered vehicles), Fuel Cell Electric Vehicles (FCEV), and other new energy vehicles (such as those utilizing supercapacitors, flywheels, and other high-efficiency energy storage devices). Non-conventional vehicle fuels refer to fuels other than gasoline and diesel. Pure electric vehicles typically have two primary sources of noise: Firstly, the so-called electromagnetic noise, which is essentially the sound produced by the vibration of the conductors in the motor's rotor and stator due to electromagnetic forces. This is similar to the humming sound heard under high-voltage power lines, as the coils are not entirely immobile. Secondly, the axial vibration of the rotor caused by electromagnetic forces. Both of these noises result from the electromagnetic induction in the coils, meaning that the greater the current, the more intense the vibrations. This explains why electric vehicles tend to produce more noise during startup and less during normal operation.
