Development of Active Noise Control System for the Ultra-compact EV

-Fundamental Consideration on Output Performance Evaluation of the Giant Magnetostrictive Actuator by Finite Element Method-

Abstract

Recently, Ultra-compact electric vehicles are now on sale that use electric motors as their driving source, which have less impact on the global environment. This vehicle has low rigidity on the outside. Therefore, road and wind noise generated while driving become interior noise. To solve this problem, we have proposed an active noise control system for ultra-compact electric vehicles using boundary vibration by giant magnetostrictive actuator. In the proposed system, the giant magnetostrictive actuator generates a high output using boundary-wall surface vibration. In this study, we developed a model of the giant magnetostrictive actuator and analyzed, by electromagnetic field analysis, output performance. From the result, in the development of giant magnetostrictive actuator for ultra-compact EV, we found that the selection of permanent magnets and giant magnetostrictive material is important to ensure stable output in the road noise frequency band.