A Proportional Resonant Control Strategy for Efficiency Improvement in Extended Range Electric Vehicles

Abstract

Abstract:The key to control the range extender generation system is to improve the efficiency and reduce the emissions of the electric vehicle (EV). In this paper, based on the purpose of efficiency optimization, both engine and generator are matched to get a public high efficiency region, and a partial power following control strategy was presented. The engine speed is constant in the defined power range, so the output power regulation of the range extender is only realized by the adjustment of the torque of the generator. Engine speed and generator torque were decoupled. An improved proportional resonant (PR) controller is adopted to achieve fast output power regulation. In order to ensure the response characteristics of the control system and to improve the robustness, the impacts on system's characteristics and stability caused by PR controller and parameters in the inner-current loop were analyzed via frequency response characteristics. A pre-Tustin with deviation compensation is proposed for PR controller's discretization. A stable and robust power following control method is obtained for the range extender control system. Finally, simulation and experiment of the proposed control strategy illustrated its feasibility and correctness.

A Systematic Review of Technologies, Control Methods, and Optimization for Extended-Range Electric Vehicles

“…Therefore, one of the main objectives is to keep the RE operating in the high-efficiency region. The engine and the generator should be matched to achieve this common operating region [8]. As another solution, several studies have focused on energy harvesting using other types of fuels, such as natural gas [35] or diesel [36,37], to reduce pollution levels.…”

Modeling and Analysis Range Extender for Battery Electric Vehicles

“…The first 5.5 kW generator fueled with 12.5 liters of diesel fuel and a second 4 kW generator filled with 25 liters of gasoline can produce about 118.75 kWh of energy. Recommended charging current at which the batteries will be charged to is: (9) 0.5 * 0.5 * 160 80…”

“…These solutions include, inter alia, the installation of power lines for the vehicle, installed over the road on which it moves [5] or the construction of a road covered with photovoltaic panels with devices for wireless transmission of energy directly to the vehicle [6,7]. Another solution to augment an electric propulsion system is to support it with a combustion engine [8][9][10], micro gas turbine [11][12][13], fuel cells [14][15][16][17][18][19][20], supercapacitors [21], or various types of batteries with the possibility of their charging while driving [22][23][24][25][26]. Hybrid vehicles can be divided according to the type of the drive system, i.e.…”

Analysis of Power Matching on Energy Savings of a Pneumatic Rotary Actuator Servo-Control System

“…Guo et al [21] used genetic algorithm to optimize the parameters of an asynchronous motor to achieve energy savings and consumption reduction, which proved the effectiveness and practicability of the power matching method of an electric pump system. Wang et al [22] matched an engine and a generator to achieve efficiency optimization and obtained a common high efficiency area. They proposed a partial power tracking control strategy.…”