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This paper presents a phenomenon of inrush current in three-phase transformer closing switch without load, a simulation model of three-phase transformer no-load switching inrush current was built by using the SimPowerSystems software package of simulink in Matlab software, and the simulation result was analyzed by Fourier transform analysis, which directly showing the characteristics of the three-phase...
For the control of non-linear system, nonlinear control theory is widely accepted as a better technique due to its robustness against uncertainty and parameter variations over the inherent short-comings of the linear control theory. A non-linear control technique named Sliding Mode Control (SMC) technique is characterized by its simplicity in analysis, design, high efficiency and robustness towards...
Power electronic circuits are now widely used in latest technologies that range from automobiles to mobile phones and many more such areas encountering our day to day life. Small signal methods are widely used for modeling power electronic circuits. This modeling technique gives an exact model which is quite suitable for analyzing a circuit sampled at switching frequency. The target of this research...
Control system of micro-plasma arc welding machine, including timing control system and parameters control system, has been studied deeply. Based on the study on timing control system and parameters control system, their models were established by automatic control theory, and systems' model simulation was implemented and analyzed by means of Simulink/Matlab. It was showed that the model of timing...
This paper introduces an unified approach for modeling Switched-mode Power supplies (SMPS) in Matlab/Simulink, starting from a piecewise-linear (PWL) model, which is symbolically derived from schematic representation of circuit, and an hybrid automaton. The proposed framework includes efficient Simulink models for PWL systems, open and closed-loop sampled-data models, linear and non-linear average...
Aiming at the problem that common sliding mode control method can not satisfy the control need of nonlinear system with disturbances and uncertainties, this paper proposed a modified global fast terminal sliding mode control method with time-delay estimation (TDE), through which, the disturbances and uncertainties were estimated and simulation analysis was carried on the brushless DC motor actuator...
Classic SPWM control mainly focused on making the output voltage of inverter transformer as close as possible to the sine wave, did not take into account the output current waveform. The voltage space vector PWM (SVPWM) control, considering the inverter and AC motor as an integral whole, control the inverter in accordance with the circular track of the rotating magnetic field, can work better. In...
Based on ANSOFT software, the 2d and 3d finite element models of switch reluctance motor were established, the dynamic simulations on the switch reluctance motor finite element models were researched by different control strategies. The accuracy and precision of the finite element models were verified by comparing the finite element results with MATLAB simulation results. The results show that the...
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