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This paper describes a rotor field oriented control of dual star induction motor (DSIM). The difficulty of control of the induction machine is the coupling between the torque and flux because; the changing of the load torque causes unquestionably the flux variation. However, to ensure a control separate of these two variables, the field oriented control is widely used in practice. The performance...
The history of faults of induction motors is nearly the same age as the history of induction motors. In the past, induction motors were used in limited places and the faults were solved by taking various measures such as grounding, using over-current protectors, or using voltage-regulators. Nowadays the induction motors are used in a wide area of applications. Therefore the diagnosis and repair of...
Recent years bring new European Union regulations concerning harmful emissions for road vehicles. The hybrid electric and electric mobility is a technology revolution for the automotive industry. In response to the stringent regulations and requirements enforced, vehicle manufacturers are developing new strategies, using hybrid electric or electric powertrain solutions. In order to obtain the goal...
This paper analyzes the influence of excitation in the experimental determination of flux linkage vs. current vs. position relationship of a switched reluctance motor. Results of the experimental characterization of the SRM in the cases of rectangular bipolar excitation, rectangular unipolar excitation and sinusoidal excitation are compared. An equivalent model of a motor phase including magnetic...
Technical and economic success of a constructive solution of asynchronous motor for excavator is determined by starting and running characteristics, energy consumption in use, overall dimensions, response time, noise level and a final and equally significant aspect, its cost. This paper is based on the use of advanced numerical methods and related software to determine optimal values of electromagnetic...
Based on analyzing the shaftless multiple unit web press experiment platform, a precise color-alignment mathematical model was established in order to characterize register system and control it. A register control simulation system was constructed in MATLAB which actuator was a permanent magnet synchronous motor. Considering the nonlinear of servo motor, a sliding mode variable structure controller...
This paper presents a d-q model of dual stator induction machine supplied by a two identical PWM voltage source inverters suitable for analysis the dynamic steady under balanced operating condition. In the analytical model, the effects of common mutual leakage inductance between the two three-phase stator winding sets have been included. The model has been developed in general reference frame and...
This study presents three-dimensional numerical simulations of a cross-flow vertical-axis marine current turbine (straight-bladed Darrieus type) with particular emphasis on rotor-performance prediction and hydrodynamic characteristics. Numerical investigations of a model turbine (power coefficient and flow behaviour) were undertaken using developed computational models. Turbine design was studied...
The paper presents the modeling and simulation study of a variable speed pump-storage power plant composed of a reversible turbine, a doubly fed induction machine (DFIM), and a multistage-multilevel frequency converter. The DFIM rotor circuit is fed by a 5-level NPC VSI. The inverter DC-link capacitor voltages are kept in balance by means of four multistage PWM rectifiers. The paper considers start-up...
The authors present the method for the dynamic simulation of a motor running with faults in the bearing inner race. In simulation, a winding function approach is applied to model of a model induction motor with mixed eccentricities due to inner race faults. A spectral analysis of the electromagnetic torque developed by the simulated motor was compared to with those of vibrations resulting from experiments...
The influence of unbalance and harmonic voltage on the work of induction motors. The influence of fill quality of the rotor winding to the overheating of the machine is studied. There are conclusions about needing to improve the supply of such units in using on the locomotives.
This paper describes the implementation and investigation the functionality of the GE 3.6 MW Wind Turbine model implemented in Matlab® and Simulink® when exposed to a wind-step. The robustness of the Wind Turbine is tested by varying the aerodynamic parameters Cp, max and λopt. It is found that, the implemented model operate as expected in different wind speed regions under different disturbances...
With the advent of various simulation software packages and low cost personal computing devices in the market, computer-aided teaching tools have become an important part of present pedagogy. These tools support the classroom teaching by enabling the instructor to illustrate the working of various systems by means of computer generated graphics. This paper presents a very easy and interactive model...
It is the focus of the research on the bearingless motors to suspend the rotor stably by controlling rotor radial displacement. Without studying the relationship between the radial suspension force and rotor radial displacement, traditional control method for rotor radial displacement has some drawbacks such as the complexity of computation and the time-consuming tuning. In order to overcome these...
The sensorless estimation principle of rotor speed and position for PMSM by high-frequency signal injection is given. The characteristic and filtering method of high-frequency current signal, rotor position signal extraction based on victor transformation and heterodyning processing method are introduced in detail. The simulation models are made, simulation results are obtained. The efficiency is...
This paper firstly describes the research background of the wind turbine imitation system, indicating the needs for the wind turbine imitation in laboratories. The current development status and the significance of the wind turbine imitation based on the switched reluctance (SR) motor are introduced. Then the model of the wind turbine and SR motor is expounded, from which the control theory and methods...
This paper analyzes the steady state characteristic of the wound rotor doubly fed induction machine when the rotor is excited with slip frequency. A motor model is also developed for conditions when the rotor excitation frequency doesn't equal to the slip frequency. The analytical model is verified by simulation results of a dynamic model built in Simulink. The stability of the machine is also analyzed...
In this paper, the wind energy conversion system that uses the “Cascade technology” especially the structure of Doubly-Fed Induction Generator (DFIG) is presented and analyzed. Moreover, a simulation of this wind energy conversion system in MATLAB/SIMULINK under different wind speeds is done and the results are presented and evaluated. Furthermore, a simulation under faulty conditions is held. More...
The paper presented a control scheme for parallel drive system of double Switched Reluctance machines. The fuzzy control algorithm is adopted in the main controller for closed-loop rotor speed control of main machine. The sliding mode control algorithm is adopted in the subordinate controller for synchronized rotor speed and loads equilibrium distribution between main machine and subordinate machine...
Control system designed for a.c. drives with a significant torsion vibration mode and applied to PMSM, which takes into account damping factor is described. Derived control algorithms for speed and position control are based on forced dynamics principles and achieve prescribed speed and position responses. Inner speed control loop complies with principles of vector control. Outer position control...
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