다상 유도전동기 기술 혁신 경로를 이해하기 위한 특허 기반 네트워크 분석

A multiphase induction motor is a motor with high power conversion efficiency. As the demand for electricity increases across various industries, the need for such high-efficiency motors is growing. In this context, verifying and understanding the current state and future prospects of multiphase induction motor technology is essential for companies and nations to establish appropriate strategies. To assess the current status and future advancements of multiphase induction motors, this study applies patent network path analysis to patents classified under Multi-phase motors(CPC H02K17/12 : Asynchronous induction motors for multi-phase current) from 1902 to 2024. The findings indicate that U.S and European companies initially led technological developments, while Chinese companies have significantly increased their technological advancements since 2010. Network clustering analysis identified three main clusters: mechanical structure improvement technologies(electric winding and pole-changing), electrical connection technologies(current waveform and sequence conversion), and smart convergence technologies(integration of sensors, electric control, and motor structure improvement). Furthermore, key technology path analysis revealed a discrepancy between companies commonly recognized as having a competitive advantage and those with actual technological influence.