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PMSM vector control system with a proportional-integral (PI) controller exists some defects such as slow speed response, large torque ripple and poor anti interference ability. A new fuzzy PI control method with adjustable proportion factor (APFPI) is proposed in this paper. The proportion factor can be adjusted by RBF neural network (RBFNN) online. In the PMSM vector control system, the current loop...
This paper presents the speed control scheme of indirect vector controlled induction motor (EVI) drive. Voltage source inverter type space vector pulse width modulation (SVPWM) is used for PWM controlling scheme. An intelligent based on Fuzzy PI controller is developed for controlling the torque component Iq current of an EVI. The complete vector control scheme of the IM drive incorporating the FLC...
The permanent magnet synchronous motor (PMSM) is increasingly playing an important role in alternating current(AC) transmission system. Recently, lots of researches have been investigated for the PMSM system without speed and position sensors. The Vector-control system based on fuzzy self-tuning PID is proposed in this paper. The new algorithm based on fuzzy self-tuning PID can improve the performance...
A new control strategy of induction motors with stator flux orientation is presented. According to the dynamic model of induction motors, stator flux is controlled effectively but affected by stator resistance. Based on the fuzzy logic control theory,the stator resistance estimator is designed to realize stator resistance on-line tuning. The Simulation confirmed the feasibility of the method.
The aim of this paper is to present a new fuzzy control scheme for real time drive efficiency improvement by the adaptive flux reduction at light loads during steady states and by the optimum flux recovery during transient states. The optimum flux recovery instead of the rated flux does not sacrifice the drive dynamic response since the torque capacity remains the same and accelerates the search convergence...
The objective of this paper is to give an insight about the development of a fuzzy logic efficiency control system which is incorporated to a standard adjustable speed drive control (i.e. Indirect Vector Control) in order to improve the online efficiency in Permanent Magnet Synchronous Motor (PMSM) drives for both transient and steady state operation. The search criterion in steady state is the minimization...
The permanent magnet synchronous motor (PMSM) is a dynamic, multi-variable and non-linear system, and the conventional PID control method is very difficult to meet the requirement for high accuracy control. This paper presents an approach of control for PMSM servo system using fuzzy radius basis function (f-RBF) neural network which has the advantages of strong adaptive ability and nonlinear approximation...
It is well understood that Vector control (VC) scheme is very co mplicated and has slower torque response. Direct torque control (DTC) scheme is easier and has faster torque response, but it'll bring the bigger torque ripples than those under VC. In this paper, a new fuzzy logic VC-DTC torque control scheme based on the common of vector control and direct torque control has been presented. The system...
A self-tuning two degree of freedom (2-DOF )PID controller based on fuzzy inference is presented. In view of the deficiency of conventional 2-DOF PID controller in the parameter time varying system, integrate the two-degree-of-freedom PID control with fuzzy techniques, a self-tuning PID controller based on fuzzy inference is designed. On-line automatically tuned parameters are realized at different...
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