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In this paper, the optimal speed control, based on Linear Quadratic Regulator (LQR) theory, through stator field orientation (SFO) of an inverter fed induction motor is addressed. The voltage source inverter, behaving as an actuator, is operated using space vector pulse width modulation (SVPWM) technique. The state feedback system is augmented with integral output error to enhance reference tracking...
The paper deals with the fault tolerant Direct Torque Control of an induction motor drive. Influence of the speed sensor faults to the properties of the DTC-SVM drive system is presented. Control structure with and without outer speed control loop is analyzed. Simple algorithmic mechanism of the speed sensor fault detection is described. During the faulted conditions vector controlled drive is switched...
A novel ADRC control structure which employs only three first-order ADRCs is presented for the speed control of induction motor drives, moreover, compared with the existing ADRC based speed control structures there is no need to estimate the rotor flux. As a result, the runtime of the proposed ADRC control algorithm is shorter than ever and the implementation of it on DSPs is easier than ever. The...
This paper presents a new approach to the sensorless speed control of induction motors (IM). The new technique uses an Adaptive Neural Fuzzy Inference Systems (ANFIS) as a rotor speed estimator to avoid using mechanical sensor. This makes the reference model free of pure integration and less sensitive to stator resistance variations. The ANFIS has been trained offline to estimate the rotor speed in...
Precise speed control of an Interior Permanent Magnet Synchronous Motor (IPMSM) drive becomes a complex issue due to complex coupling among its winding currents and the rotor speed as well as the nonlinear nature of the developed torque. The system nonlinearity becomes severe when the IPMSM drive operates in the field weakening region. The main purpose of this paper is to present the implementation...
A dual mechanical port electric (DMP) machine is used as an electrical variable transmission (EVT) in hybrid electric vehicle (HEV). In the conventional HEV, this machine is replaced to planetary gear box and two electric machines and makes their structures simpler. In this paper improved vector control of DMP machine with optimum design of PI speed controller and implementation of MTPA method is...
A novel PID controller based on particle swarm optimization (PSO) has been applied to permanent magnet synchronous motor (PMSM). The PSO controller has replaced the conventional PID controller in the speed-regulation loop of vector control. It is intelligent and convenient to find the PID parameter. Experimental results have also demonstrated that PMSM which uses the PSO controller has better robustness...
Starting up and/or low speed operations are imperative for double-fed induction machine (DFIM) in DFIM-based driving system or DFIM-based wind turbine system under low speed wind conditions. Compared with others, the rotor-side driving control strategy with stator-winding short circuited can operate DFIM, without extra equipments, at low speed very well. The operation theory is analyzed, based on...
Because of its low maintenance and robustness, induction motors have many applications in the industries. Most of these applications need fast and smart speed control system. This paper introduces a smart speed control system for induction motor using fuzzy logic controller. Induction motor is modeled in synchronous reference frame in terms of dq form. The speed control of induction motor is the main...
This paper presents an adaptive filter for fuzzy-logic controller for vector controlled based speed controller incorporating with a maximum torque per ampere (MTPA) of an interior permanent magnet synchronous motor (IPMSM) drive to minimize the torque ripple. The design and optimization of the FLC, infinite impulse response (IIR) filter and the adaptation algorithms are presented. Different operating...
The principle of vector control of electrical drives is based on the control of both the magnitude and the phase of each phase current and voltage. Matlab/Simulink has been performed for assessment of operating features of the proposed scheme. PI speed controller are designed in this paper, Test response of the developed variable speed drive along with simulated response are given and discussed in...
This paper describes an analysis method for achieving control torque and speed with vector control for induction motors. An indirect field-oriented output feedback motor controller is presented; it is suitable for low-cost applications. A current model control is used to sense back electromotive force (back-EMF) by means of an analog to digital converter (ADC); its simulation and filtering are discussed...
Forced dynamics control principles are exploited to develop control algorithms for electric drive with PMSM and flexible couplings. The controller is of the cascade structure, comprising an inner speed control loop, which respects the principles of vector control and requires a load torque estimate and an outer position control loop, which is designed to control the PMSM rotor or load angle in the...
Sensorless speed and position control of permanent magnet synchronous machine still is a challenge especially for surface mounted permanent magnet synchronous machines. This paper describes the high frequency signal injection based technique for control of surface mounted permanent magnet synchronous motor. Due to the fact that it does not use the fundamental machine model, which fails at standstill...
The paper presents the dynamic model of doubly fed induction generator (DFIG) including the mechanical model, the generator model and the PWM voltage source converter model. The mechanical model uses two-mass model, and the generator model includes both the stator side and the rotor side dynamics. The PWM voltage source converter is modeled as an average model in which the action of power electronic...
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