Abstract
Due to increasing fuel prices, the world is moving towards the use of hybrid electric vehicles (HEVs) because they are environmentally friendly, require less maintenance, and are a green technology. The energy management system (EMS) plays an important role in HEVs for the efficient storage of energy and control of the power flow mechanism. This paper deals with the design, modeling, and result-oriented approach for the development of EMS for HEVs using a fuzzy logic controller (FLC). Batteries and supercapacitors (SCs) are used as primary and secondary energy storage systems (ESSs), respectively. EMS consists of the ultra-power transfer algorithm (UPTA) and FLC techniques, which are used to control the power flow. The UPTA technique is used to charge the battery with the help of a single-ended primary inductor converter (SEPIC) during regenerative braking mode. The proposed research examines and compares the performance of FLC with a proportional integral (PI) controller by using MATLAB (Simulink) software. Three scenarios are built to confirm the efficiency of the proposed design. The simulation results show that the proposed design with FLC has a better response as its rise time (2.6 m) and settling time (1.47 µs) are superior to the PI controller.
Highlights
This paper presents the modeling, design, and simulation result of the fuzzy logicbased energy management system (EMS) of hybrid electric vehicles (HEVs) for the energy storage systems (ESSs)
The Fuzzy Logic Controller (FLC) consists of three inputs, namely error current, speed, and SOC of the battery, and one output which is the duty cycle to feed in Mosfet of the boost converter
A ultra-power transfer algorithm (UPTA) system is used to control the power flow mechanism and charge the battery using an ultra-capacitor during regenerative braking
Summary
The cost and demand for fuel are increasing and this plays an important role in global warming. There is a need for an alternative form of energy that has less cost and is more reliable and efficient. The temperature of the world is increasing due to pollution and the emission of hazardous gases. The world is moving towards the use of a clean form of energy. Electric vehicles (EVs) are environmentally friendly, have lower fuel consumption, are pollutant-free and are a clean urban transport technology. The energy flow between sources and the load is the main issue of energy losses. These losses can be reduced by using efficient energy management techniques
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