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A torque control method for Brushless Direct Current (BLDC) motor is introduced in this paper, which plays vital roles in In-wheel vehicle system. In-wheel motor can be used in electric cars with 4 wheels independent drive configuration. Within every wheel, there can be one “Direct-Drive In-wheel motor” to generate the necessary torque per wheel. In order to improve dynamic response characteristics...
The principle of vector control of AC machine enables the dynamic control of AC motors, and induction motors in particular to a level comparable to that of a DC machine. The vector control of currents and voltages results in control of spatial orientation of the electromagnetic fields in the machine and has led to term field orientation. Field oriented control schemes provide significant improvement...
Driver torque and steering reaction force are important information in the designing of EPAS (Electric Power Assisted Steering) system. The driver torque determines the amount of assisted torque and the reaction force can be used to improve the steering feeling and the vehicle stability or introduce a new assist torque control. Since, in practice, they are not usually measureable; a sliding mode observer...
Hybrid under-actuated control for the autonomous dynamic balance of a running electrical bicycle including frictional torque and motor dynamics is developed, where includes two control inputs: steering and pendulum voltages, and three system outputs: steering, lean and pendulum angles. Due to the under-actuated feature, two novel reference signals using three system outputs are designed so that the...
Mass distribution variations in helicopters cause significant adverse effects on helicopter flight. These variations are triggered by unwanted torques. These unwanted torques must be compensated for the sake of smooth and comfortable flight. This paper presents a robust control algorithm to overcome the fore-mentioned problem. The robust control algorithm is based on super twisting based 2-sliding...
Recently, the size of wind turbines is increased. As a result, the permanent magnet synchronous generator (PMSG) plays an important role because of its simple structure and high efficiency. This paper proposes a torque and pitch control scheme for variable speed wind turbines. A torque controller is designed to maximize the output power below the rated wind speed and a pitch controller is designed...
Direct Torque Control (DTC) has been extensively researched and applied to most AC machines during the last two decades. Its first application to the Brushless Doubly-Fed Reluctance Machine (BDFRM), a promising cost-effective candidate for drive and generator systems with limited variable speed ranges (such as large pumps or wind turbines), has only been reported a few years ago. However, the original...
Direct Torque Control (DTC) has been extensively researched and applied during the last two decades. However, it was applied to the Brushless Doubly-Fed Reluctance Machine (BDFRM) for the first time only a few years ago in its basic form inheriting its intrinsic flux estimation problems that propagate throughout the algorithm and hence compromise the DTC performance. In this paper, we propose the...
In this paper, based on a radial basis function (RBF) neural network, a sliding mode control (SMC) strategy for brushless doubly fed machine (BDFM) is presented. The operating principle of BDFM has been introduced. The dynamic model of rotor field oriented and electromagnetic torque for BDFM is expressed. The proposed controller for BDFM eliminates the chattering encountered by most SMC schemes, and...
In this paper a novel framework for idle speed control of a spark ignition engine is introduced. The control task is to maintain the engine speed and the torque reserve at their reference values while the clutch is open. For this purpose a robust control design is proposed using sliding mode theory. It will be shown that this framework is robust against external load torque disturbances, parameter...
Aiming at the rapidity control problem of direct drive electro-hydraulic (DDEH) servo rotary vane steering gear, a design method of adaptive fuzzy sliding mode control with friction torque dynamic compensation is presented. The friction torque dynamic compensation method is introduced to enhance the response of the system. The adaptive fuzzy controller is introduced to solve the problem of the uncertain...
This paper encompasses the study of modelling and design of WECS, using a wind turbine with known dynamic characteristics and a permanent magnet synchronous generator driven by a back to back power converter topology. The dynamic modeling allows to know the response of the turbine generator system in the whole range of operation. In this study, it is proposed a variable structure control scheme with...
This contribution deals with design of sliding mode based stator flux observer for direct torque and flux controlled induction machine drives. Proposed flux observer is completed by simple estimation of rotor speed in order to achieve a sensorless drive control. Proper function of presented sensorless control is verified by both simulations and experiments made on designed laboratory prototype of...
This paper presents a sensorless predictive torque control. The predictive torque control is based on pre-calculation of the best switching state in order to keep the state variables close to desired values. The control scheme uses a proportional-integral controller inside of predictive control in order to improve the steady state response. The stator flux that determines the stator voltage is pre-calculated...
The main goal of increasing the number of phases in an induction machine is to ensure its performance in all the operating modes such as normal, disturbed and faulted settings. When the induction machine is working under a faulted mode such as one or more phases are missing, this leads to a high torque oscillations and bad tracking behaviour. Designing a suitable control design such as sliding mode...
A nonlinear adaptive robust speed tracking controller is presented for a three-phase surface permanent magnet synchronous motor (SPSMS) considering the control strategy of maximum torque control (MTC) related to this motor. Ignoring the motor iron losses, the proposed controller is designed based on combination of input-output feedback linearization (IOFL) control and adaptive sliding mode technique...
A synchronous reluctance motor driven by an integral variable structure controller for current sensorless is presented. The mathematical model for the synchronous reluctance motor includes core loss. We develop a maximum torque control strategy. The integral variable structure controller is used to reject the uncertain bounded disturbances and parameter variations. The voltage reference equation generates...
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