48V 마일드 하이브리드 차량의 전기적 구조 최적화 기반 동력 관리 전략

Abstract

본 논문에서는 48V Mild Hybrid Electric Vehicle의 다양한 전기적 구조에 대해 분석하고 Dynamic Programming을 이용한 최적의 전기적 구조 도출 연구를 진행하였다.

대상 차량인 48V Mild Hybrid Electric Vehicle는 기존 내연기관 차량의 구조 변경을 최소화 할 수 있어 시스템의 복잡도를 낮추면서 연비 및 성능 확보에 장점이 있어 현재 많은 연구가 이루어지고 있다. 하지만 본 차량은 일반적인Hybrid Electric Vehicle에 비해 낮은 배터리 용량과 제한된 성능의 Motor Generator를 가지고 있다. 이는 연비 향상에 도움을 주는 EV 주행이 상대적으로 제한적임을 의미하므로 Motor의 동력 보조가 적절하게 사용되는 것이 중요하다.

하지만 기존 논문에서는 Hybrid Electric Vehicle의 기계적 구조에 대한 연구는 많으나 전기적 구조 각 부품의 배치에 따른 효율 비교에 대한 연구는 아직 부족하다. 따라서, 이 논문에서는 다양한 전기적 구조의 부품의 배치에 따른 효율에 대한 비교 연구를 진행하였다.

본 논문은 48V Mild Hybrid Electric Vehicle의 다양한 기계적 구조 중 P2 구조를 대상으로 최적의 전기적 구조 도출에 대해 연구하였다. P2구조는 Motor Generator가 Engine과 Transmission 사이에 위치하는 구조로 회생 제동이 가능하며, 클러치 체결 여부에 따라 EV 주행이 가능해 이점이 있다.

본 논문에서는 Global optimization control strategy로 널리 쓰이는 Dynamic Programming을 이용하여 48V Mild Hybrid Electric Vehicle에 대해 제안된 다양한 전장 부하 모델을 포함한 5가지 전기적 구조에 대해 연비 및 동력 분배 경향성을 분석하고, 고 효율의 최적 전기적 구조를 제시한다.

|In this paper, various electrical architectures of 48V Mild Hybrid Electric Vehicles were analyzed and optimal electrical architecture derivation research using dynamic programming was conducted.

48V Mild Hybrid Electric Vehicle, which is a target vehicle, can minimize the structural change of the existing internal combustion engine vehicle, thereby reducing fuel system complexity and securing fuel economy and performance. However, this vehicle has a motor generator with limited battery capacity and limited performance compared to a typical hybrid electric vehicle. This implies that EV driving, which helps improve fuel economy, is relatively limited, so it is important that the power assistance of the motor be used properly.

However, in the existing papers, there are many studies on the mechanical architectures of the hybrid electric vehicle, but there is still insufficient research on the efficiency comparison according to the arrangement of each component of the electric architecture. Therefore, in this paper, a comparative study on the efficiency according to the arrangement of components of various electrical architectures was conducted.

This paper studied the optimal electrical architecture derivation for P2 architecture among various mechanical architectures of 48V Mild Hybrid Electric Vehicle. The P2 architecture is an architecture in which the motor generator is located between the engine and the transmission, and regenerative braking is possible, and EV driving is possible depending on whether the clutch is engaged.

In this paper, we analyze fuel efficiency and power distribution tendency for five electrical architectures including various electric load models proposed for 48V Mild Hybrid Electric Vehicle using dynamic programming widely used as global optimization control strategy.

As a result, The optimal electrical architecture is presented.; In this paper, various electrical architectures of 48V Mild Hybrid Electric Vehicles were analyzed and optimal electrical architecture derivation research using dynamic programming was conducted.

48V Mild Hybrid Electric Vehicle, which is a target vehicle, can minimize the structural change of the existing internal combustion engine vehicle, thereby reducing fuel system complexity and securing fuel economy and performance. However, this vehicle has a motor generator with limited battery capacity and limited performance compared to a typical hybrid electric vehicle. This implies that EV driving, which helps improve fuel economy, is relatively limited, so it is important that the power assistance of the motor be used properly.

However, in the existing papers, there are many studies on the mechanical architectures of the hybrid electric vehicle, but there is still insufficient research on the efficiency comparison according to the arrangement of each component of the electric architecture. Therefore, in this paper, a comparative study on the efficiency according to the arrangement of components of various electrical architectures was conducted.

This paper studied the optimal electrical architecture derivation for P2 architecture among various mechanical architectures of 48V Mild Hybrid Electric Vehicle. The P2 architecture is an architecture in which the motor generator is located between the engine and the transmission, and regenerative braking is possible, and EV driving is possible depending on whether the clutch is engaged.

In this paper, we analyze fuel efficiency and power distribution tendency for five electrical architectures including various electric load models proposed for 48V Mild Hybrid Electric Vehicle using dynamic programming widely used as global optimization control strategy.

As a result, The optimal electrical architecture is presented.