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The fact that the drive system of an electric vehicle (EV) and hybrid electric vehicle (HEV) is powered by the battery and cooled by car coolant increases the importance of machine operation at an optimal operating point both with respect to efficiency and thermal considerations. This paper investigates the temperature effect on the machine's performance and suggests a fuzzy logic controller to optimize...
Cornering stability of 4 wheel drive hybrid electric vehicle has been analyzed and improved, where the front motor and the rear motors are used to drive the vehicle. For the control of the motors, a model reference sliding mode controller is designed to generate the additional yaw moment for the vehicle. The algorithms for the motor driving and the yaw rate control for the 4 wheel drive hybrid electric...
In this paper using Adaptive Backstepping approach an adaptive rotor flux observer which provides rotor speed, stator and rotor resistances estimation simultaneously for induction motor used in series hybrid electric vehicle is proposed. The controller of induction motor (IM) is designed based on input-output feedback linearization technique. Combining this controller with adaptive backstepping observer...
In the automotive propulsion systems, the engine performance is influenced by the torque variation required by the electrical machine for power generation. To attenuate this influence, this paper investigates the engine speed control problem with the compensation of electrical torque. First, a brief review of the models for the electrical machines, mainly, the simple alternator and PMSM, will be given,...
This paper presents a hybrid controller for hybrid electric vehicles using hybrid system theory. The hierarchical control structure of parallel hybrid electric vehicle (HEV) is introduced first and the drive control problem of the vehicle is formulated using hybrid system theory. State machine theory is applied to solve the problem of vehicle operating mode transitions. Then a fuzzy torque distributor...
In the normal condition, the front wheels follow the control trace of the driver and rear wheels follow the direction of the vehicle. The vehicle will spin and lose the control trace of the driver if the traction force is greater than the friction force. Therefore, a vehicle should maintain an adequate slip ratio of the tires and follow the control trace of the driver. This paper describes a fuzzy...
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