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조향 BLAC모터 과열방지 로직의 시스템 열특성 예측 기법
원태준(Tae-Jun Weon),우성준(Seong-Jun Woo),김두영(Doo-Young Kim),유호준(Ho-Jun Yoo),박윤영(Yoon-Young Park) 한국자동차공학회 2024 한국자동차공학회 부문종합 학술대회 Vol.2024 No.6
In MDPS system, BLAC motor is adapted for assist torque. MDPS BLAC motor uses very high current compaerd to any other similar-size motor of different systems. Therefore, BLAC motor is on risky situation for high tempertarue irreversible demagnetization. For preventing the irreversible output reduction, There should be software logic for overheat protection. The logic work with the BLAC motor system thermal characteristics for temperature prediction. Those thermal characteristics are lumped parameters for simplification of the logic. Thermal parameters decision is done with very high level of safety factor. In this study, we analize the trend of logic for thermal parameters and propose the improved algorithm for finding optimized thermal parameters for overheat protection logic.