International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
A Novel 4WD Permanent Magnet Synchronous Motor for an Electrical Vehicle Control Strategy Based on Direct Torque Control Space Vector Modulation Techniques Mr. Rajeev Singh 1, Mis. Pooja Mishra2 ,Mr. Ravi Kumar3,Mr. Ompraksh Bhariya4 1234Post
Graduate Student, Department of EX, TIT Bhopal, RGPV. Bhopal, Madhya Pradesh, India
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Abstract:- In this work we propose a Direct Torque Control (DTC) Four-Wheels-Drive (4WD) Electric Vehicle (EV) controlled with Direct Torque Control based on Space Vector Modulation (DTC-SVM) is presented, Where the electrical traction chain was well analyzed and studied from the lithium battery, the buck boost to the mechanical load behavior. The speed of four wheels is calculated independently during the turning with the electronic differential system computations which distributes torque and power to each in-wheel motor according to the requirements, adapts the speed of each motor to the driving conditions. The basic idea of this work is to maintain the initial battery state of charge (SOC) equal to 70% and the state of charge energy decreases where the acceleration process and the state of charge energy increase where the deceleration process prototype was tested in several topology conditions and under speed. The simulations carried Mat lab / Simulink verified the efficiency of the proposed DTC-SVM controller and show that the system has a more favorable dynamic performance. The results also indicate that this strategy can be successfully implemented into the traction drive of modern 4WD electric vehicles. Keywords: 4WD, DTC, DTC-SVM, Electric Vehicle, SOC, Flux ripple.
1.1 INTRODUCTION ─The principal constraints in vehicle for transportation are the development of a non-polluting high safety and comfortable vehicle. Taking into account these constraints, our interest has been focus on the 4WD electric vehicle, with independent driving wheel-motor at the front and with classical motors on the rear drive shaft. This configuration is a conceivable solution, the pollution of this vehicle is strongly decreased and electric traction gives the possibility of achieve accurate and quick control of the distribution torque. Torque control can be ensured by the inverter, so this vehicle does not require a mechanical differential gear or gearbox. One of the main issues in the design of this vehicle (without mechanical differential) is to Š 2017, IRJET
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assume the car stability. During the normal driving condition, all drive wheel system requires a symmetrical distribution of torque in the both sides. In recent years, due to problems like the energy crisis and environmental pollution, the Electric Vehicle (EV) has been researched and developed more and more extensively. Currently, most EVs are driven by two front wheels or two rear wheels. Considering some efficiency and space restrictions on the vehicle, people have paid more and more attention attention in recent years to four wheel drive vehicles employing the IM in wheel motor. The Direct Torque Control (DTC) strategy is a kind of high performance driving technology for AC motors, due to its simple structure and ability to achieve fast response of flux and torque has attracted growing interest in recent years. DTC-SVM with PI controller Direct torque control without hysteresis band can effectively reduce torque and flux ripple, DTC-SVM method can improve the system robustness and effectively improve the system dynamical performance. The DC-DC converter is used with wide range in electric vehicles to ensure the energy required for the propulsion system. The objective of this paper is to understand the lithium-ion battery compartment controlled by DC-DC converter, each of the wheels is controlled independently by using direct torque control based space vector modulation under several topology and Speed variations. Modeling and simulation are approved out using the Mat Lab / Simulink tool to study the performance of 4WD proposed system. ELECTRICAL VEHICLE DESCRIPTION According to Figure 1, the opposing forces acting to the vehicle motion are: the rolling resistance force F tire due to the friction of vehicle tires on the road; The aerodynamic drag force F aero caused by the friction on the body moving through the air; And the climbing force F slope that depends on the road slope.
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