This study presents a comparative thermal-fluid analysis of Wireless Power Transfer(WPT) receivers of 50kW for electric vehicle and 1.5kW for AMR/Robot. Conjugate heat transfer simulations were performed to investigate temperature, flow characteristics, and heat transfer characteristics of two WPT receiver systems with different power levels, system configurations and application environments. For the 50kW receiver, the coolant temperature increased 1.77℃, while the coolant pressure loss was 17.587kPa. The heat absorbed by coolant was approximately 2.21kW, corresponding to about 97.5% of the total heat generation. For the 1.5kW receiver, natural convection circulation was formed through housing openings. The IMN inductor showed the highest temperature of 154.40℃ below its Curie temperature 220℃. System level experiments were also conducted for the 1.5kW WPT system to examine its thermal behavior under operating conditions. In addition, 1.5kW WPT system installed on an actual AGV, which operated normally during driving and wireless charging without overheating or charging interruption. The results demonstrated that thermal management design for WPT receivers with different power levels and application environments should comprehensively consider the cooling method, heat source distribution, heat transfer paths, flow uniformity and pressure loss.
목차
Abstract 1. 서론 2. 전산 해석 모델링 2.1 무선충전 수신부 형상 및 모델링 2.2 전산 해석 지배방정식 2.3 경계 조건 및 해석 조건 3. 전산해석 결과 및 분석 3.1 1.5kW급 무선충전 수신부 해석 결과 3.2 50kW급 무선충전 수신부 해석결과 4. 1.5kW급 무선충전 시스템 실증 5. 결론 후기 References