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A new gain-scheduling sliding mode controller for permanent magnet synchronous motor (PMSM) was designed to achieve position tracing control and robust control. The sliding mode position controller is designed to ensure the tracing and robust performance of the PMSM servo system firstly, and then the gain-scheduling based on fuzzy logic theory is adopted to reduce chattering of sliding mode controller...
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...
In this paper, a new variable structure position control law for a Six Phase Induction Machine (6PIM) is proposed. The algorithm based on a time-varying switching line guarantees the existence of sliding mode since the beginning of the shaft motion. Indeed, the surface is initially designed to pass through the initial representative point and subsequently moved towards a predetermined desired surface...
This paper proposes a high-order nonsingular terminal sliding mode control method for induction motor velocity servo systems. Based on the vector control principle, high-order nonsingular terminal sliding mode controllers in velocity loop, current loop and flux loop are designed respectively. The nonsingular terminal sliding mode control is utilized to improve the response speed and robustness of...
A global sliding mode variable structure controller based on exponential reaching law is adopted to Permanent magnet Synchronous Motor. First, the controller can ensure sliding behavior throughout an entire response, we can specify the demands on the capability of the system to achieve a desired performance. Moreover, the controller is based on exponential reaching law, which overcome the drawbacks...
In this paper, a new variable structure position control law for a Six Phase Induction Machine (6PIM) is proposed. The algorithm based on a time-varying switching line guarantees the existence of sliding mode since the beginning of the shaft motion. Indeed, the surface is initially designed to pass through the initial representative point and subsequently moved towards a predetermined desired surface...
In this paper a so-called sliding mode control (SMC) technique is applied for variable speed wind energy conversion system (WECS) control with doubly-fed induction generator (DFIG). The paper also points out interesting performances of the double-fed induction machine (DFIM) used as flywheel energy storage system (FESS). In fact, adjusting the rotor speed can allow the induction machine to release...
The control scheme of parallel drive system of the dual Switched Reluctance machines based on fuzzy logic control is proposed and verified for the first time. The system consists of main machine, subordinate machine, main power converter, subordinate power converters, main controller and subordinate controller. The main controller is used for closed-loop rotor speed control of main machine, with the...
This paper proposes an observer based on the nonsingular terminal sliding mode (NTSM) method and the high-order sliding mode (HOSM) method for estimating the rotor speed and the rotor flux in the induction motor control system. A terminal sliding mode observer is designed to estimate the rotor speed and the rotor flux of the motor system with fast convergence and better tracking precision. A high-order...
An adaptive fuzzy sliding mode controller is presented for a nonlinear system with perturbed uncertainties of PMSM (Permanent Magnet Synchronous Motor) associated with the sliding mode control. This controller employs fuzzy control to assign compensate according to expert's experience, and adaptive control to attenuate chattering caused by sliding mode control. This method is applied to PMSM servo...
This paper focuses on wind energy conversion system (WECS) analysis and control for power generation along with problems related to the mitigation of harmonic pollution in the grid using a variable-speed structure control of the doubly fed induction generator (DFIG). A control approach based on the so-called sliding mode control (SMC) that is both efficient and suitable is used for power generation...
A nonlinear position controller for permanent magnet synchronous motor (PMSM) was designed to achieve position tracing control and robust control. The controller included two parts: the model controller and the robust controller. The former was designed to ensure a desired reference output trajectory, and the later was devised to realize the robust control against PMSM parameter variations and load...
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...
In this paper, the discrete time sliding mode technique is used to design a control scheme for the torque and flux square modulus reference tracking of an induction motor. The controller is designed on the basis of a discrete-time model in closed form obtained by a suitable continuous feed-forward signal. To estimate the rotor flux and the load torque, a discrete time reduced observer is also proposed...
Induction Motor (IM) speed control is an area of research that has been in prominence for some time now. In this paper, a nonlinear controller is presented for IM drives. The nonlinear controller is designed based on input-output feedback linearization control technique, combined with sliding mode control (SMC) to obtain a robust, fast and precise control of IM speed. The input-output feedback linearization...
Induction Motors have been used as the workhorse in the industry for a long time due to its easy build, high robustness, and generally satisfactory efficiency. However, they are significantly more difficult to control than DC motors. One of the problems which might cause unsuccessful attempts for designing a proper controller would be the time varying nature of parameters and variables which might...
In this paper a sliding mode controller for the stator voltage amplitude of a stand-alone wound rotor synchronous generator is presented. The standard dq-model of the electrical machine connected to an isolated inductive load is obtained. Then, a control law is designed in the framework of sliding mode control. The controller introduces a dynamic extension so that the stator amplitude relative degree...
In this paper, a new control approach for real time speed synchronization of multiple induction motors during speed acceleration and load changes is developed. The control strategy is to stabilize speed tracking of each motor while synchronizing its motion with other motors' motions so that differential speed errors amongst multiple motors converge to zero. An adjacent cross coupling control architecture...
This paper presents two nonlinear controllers schemes for DC bus voltage regulation of self excited induction generator operating in vector control conditions; the input-output feedback linearization and the sliding mode approaches. Each technique has two loops: an inner loop controlling the rotor flux and an outer loop controlling the DC bus voltage. The nonlinear methods provides an excellent control...
This paper investigates several chattering suppression methods for DSP based implementation of sliding mode control (SMC). It concentrates on the `equivalent-control-dependent' and `state-dependent' gain adjustment methods proposed in recent theoretical studies, and tests the effectiveness of these proposals for current regulation of PM DC drives. The well-known observer-based method was also used...
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