http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
토크 제한 및 회생 제동 제어 로직 검증을 위한 전기이륜차 시뮬레이션 모델 연구
백남철(NamChul Paik),양성모(SeongMo Yang),김호경(HoKyung Kim),이준우(JunWoo Lee) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11
This study focuses on developing agile processes for electric two-wheeler R&D to adapt to changing eco-friendly vehicle policies and diverse market requirements. By applying Model-Based Development (MBD) like A-SPICE, the research aims to promptly validate the impact of subsidy policy changes and performance requirements on component specifications and software. Various vehicle models, driving modes, and battery scenarios are implemented for real-time validation. The study models efficient motor and MCU operation, battery pack performance, and drive system characteristics. Torque and regenerative braking logics are introduced to predict test results and avoid repetitive real-world tests. The results demonstrate consistent application of torque limit logic during maximum acceleration tests, with similar trends in battery and motor temperatures showing minimal differences of less than 3 degrees. The regenerative braking logic is validated through predictive tests in CVS40 driving mode, closely resembling actual test consumption and accurately predicting energy accumulation through regenerative braking within a 2% margin.
구동용 PMSM 모터의 Semi-empirical 모델 기반 토크 제어
백남철(NamChul Paik) 한국자동차공학회 2023 한국자동차공학회 부문종합 학술대회 Vol.2023 No.5
The PMSM motor achieves the required torque by adjusting sinusoidal currents with specific phase differences. Since the phase current that satisfies the required torque has several solutions with different efficiencies, an optimal efficiency control system is needed. In this paper, we presented a control model that estimates the torque of the motor simply and effectively based on the amount of current (Imag) and the angle (β) at which the current is applied. For the torque model, a semi-empirical model was developed using the test data of the motor, and model optimization was performed using an optimal data calculation algorithm. The torque model that calculates the control current for the target torque is inverse transformed so that the actual torque can be calculated with the control current. Through this, a feedback control system based on two feed forward torque models that can be inversed are created. This paper confirmed that various advantages were feasible by adopting above torque control algorithms.
RTC를 이용한 전기이륜차 보조배터리 방전 방지 알고리즘
변세희(Sehee Byun),백남철(Namchul Paik),곽인재(Injae Kwak),이준우(Junwoo Lee),김상훈(Sanghoon Kim) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11
In this paper, we propose an auxiliary battery discharge prevention algorithm for semi-permanent use of auxiliary batteries for electric two-wheelers. The market for electric two-wheelers is growing due to the recent increase in delivery demand due to the COVID-19 and eco-friendly policies in India and Southeast Asian countries. In order to be competitive in the growing electric two-wheeler market, it is necessary not only to improve driving performance but also to develop various additional functions, so the use of auxiliary batteries in electric two-wheelers is essential and important. To prevent the auxiliary battery from being discharged, when the vehicle is not in use, the VCU wakes up periodically to check the auxiliary battery voltage. If necessary, it turns on the high voltage system to charge the auxiliary battery using the main batteries as a charging source. For this purpose, the ADC and RTC alarm wakeup functions of the VCU are utilized. In addition, data was calibrated considering the parasitic current of the entire system and the capacity and charge/discharge characteristics of the auxiliary battery. Finally, the effectiveness of the algorithm was validated through repeated charging and discharging tests in an actual vehicle.
2채널 High-side 스위치를 활용한 전기이륜차 방향지시등 고장 진단 기법
이준우(JunWoo Lee),백남철(NamChul Paik),노형태(HyeongTae Noh),진실로(SilLo Jin) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11
A direction indicator lamp is an essential component not only automobile but also Wheeler to indicate to other roaddrivers that the driver intends to change a direction to the right or to the left. To drive safely, the direction indicator lamp should be operated accordingly when driver orders to operate it by setting direction indicator lamp’s switch ON. If the direction indicator lamp is in trouble, it should be informed with certain sound or display so that driver is to repair it. For that reason, the regulation of Wheeler requires when the failure of direction indicator lamp occurs the failure should be informed to driver with a certain pattern of sound or a displaying in cluster. Therefore, this study suggest a simple way to detect the failure of direction indicator lamp using High-side driver’s Sensing Current signal to detect the failure without installing any additional components or relay.