전기이륜차 제어기 원가 절감형 사운드 기술 개발 방법

다국어 초록 (Multilingual Abstract)

Electric two-wheelers provides various advantages such as energy efficiency, reduced carbon emissions, and saving on fuel costs, specially low noise levels. However, low noise can cause accidents for pedestrians and drivers, the physically vulnerable group. To address this issue, some countries are mandating the installation of sound generation systems on electric cars and electric two-wheelers. The sound system of electric two-wheelers can be installed by mounting an external sound module or embedding a sound module chip on the controller circuit. The embedded sound chip method may not be advantageous for maintenance, but it is efficient for system integration and cost reduction. This paper developed technology that replaces the sound chip in the controller of electric two-wheelers to cut costs. Methods included utilizing GPIO pins with DAC support and implementing sound output through the high-speed PWM switching technique of the Lowside device. Both methods were found to be capable of replacing IS2 chips in terms of sound quality. Additionally, operating these methods alongside the I2S chip is expected to contribute to ensuring sound system integrity and enhancing vehicle safety.