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we propose a novel drive circuit for switched reluctance (SR) motors, which can be constructed using general 3-phase power modules without external inductors or devices. This drive method has several advantages including low cost, high efficiency, and compactness. It is simulated on SPICE, including the controller, and some control algorithms and the driving performances have been investigated. Then,...
In this paper the electric and magnetic field distribution is investigated in solid toroidal cores with rectangular cross section. An analytical method is used in which the field distribution is calculated by means of orthogonal expansion. Based on the results, the influence of various parameters, such as frequency and conductivity of the core material, on the core losses is discussed. The calculated...
Design concept of FPGA based hardware controller is proposed with basic modules for the development of power electronics applications. Also an autonomous decentralized control system for single phase UPS inverter with FPGA based hardware controller using software CPU core is described. Progress of FPGA technology makes it possible to include the software macro CPU core into the FPGA chip, a high flexibility...
This paper focuses on new control techniques for a direct power converter having a resonant tank on the output side feeding a rectifier. The application being considered is for HV power supplies. The objective of the control is to provide a stable output, with good supply current quality. Two predictive controllers are described, one based on the output tank dynamics and one based on the input filter...
Multilevel inverters have become an attractive alternative for medium voltage and power quality demanding applications. However, like most power converter families, multilevel inverters are controlled with modulation techniques that are conceptually based on nonlinear waveform synthesis assuming constant dc-link voltages. Nevertheless, real applications have load and supply dependent dc-links that...
This paper presents the input current control scheme of three-phase PWM converters to realize the unity effective power factor and the stable output dc voltage for the rectangular-waveform distribution system. The input current control is based on the discrete-time system. The authors propose the fast control scheme of the input current under the voltage saturation of the PWM converter. The effectiveness...
Electric vehicles technology has been an attractive topic for many researchers around the world during the last three decades. Single, double or four wheeled traction are popular applications with corresponding advantages and drawbacks. It's also known that fault tolerance and high reliability are some needed characteristics in this kind of power electronic application. In this paper, it is proposed...
Distributed power generation will be formed in many weak distribution networks, after renewable energy sources are connected to them. It is very important to increase the reliability and efficiency of using these renewable energy sources. By using DVR (dynamic voltage restorer), the power quality problem in distributed power generation (e.g. voltage fluctuation) can effectively be solved. In this...
The effects of a fault current limiter (FCL) on different types of faults in a three-phase network are presented in this paper. The FCL is based on a six-pulse thyristor rectifier with a freewheeling diode. Parallel to the three branches of the rectifier a further thyristor branch is added to handle faults with connection to earth. The FCL is directly connected to a transformer's neutral terminal...
This paper develops a technique to estimate the production of small-power wind turbines by means of Weibull distribution. Moreover, a characterization of the employed turbine has been achieved obtaining experimental results of the production. Finally, a comparison of practical measurements and those estimated has been made presented
Motion control has been widely used in industry applications. One of the key technologies of motion control is a disturbance observer, which quarries a disturbance torque of a motion system and realizes a robust acceleration control. The disturbance observer can observe and suppress the disturbance torque within its bandwidth. Recent motion systems begin to spread in the society and they are required...
This paper presents a new control method for mobile robots moving in its work field which is based on fuzzy logic and artificial potential field. First, the artificial potential field method is presented. The paper treats unconstrained movement based on attractive artificial potential field and after that discuss the constrained movement based on attractive and repulsive artificial potential field...
A model predictive trajectory tracking control applied to a mobile robot is presented in this paper. Prediction model derived from linearized tracking error dynamics is used to predict future system behavior. A control law is derived from quadratic cost function consisting of system tracking error and control effort. Experimental results on a real mobile are presented and a comparison of the obtained...
In this study, sliding mode (SM) based partial feedback linearization (PFL) control method is applied to a single flexible link arm (FLA) with payload. A sliding mode based partial feedback linearization controller is designed to achieve set point precision positioning control for a FLA. Flexible robot arms have structural flexibilities and resulting high number of passive degrees-of-freedom. They...
In recent years, bilateral system has been widely researched for its functionality and availability. The system is effective in the fields of medical treatment, but application is limited to one-on-one system. The purpose of this study is development of basic technology for haptic information sharing technology. In this paper, a noble bilateral control method is introduced to realize multiple inputs...
The paper presents a short introduction to reconfigurable systems and why are they used or should be used in control of AC drives. The reconfigurable vector control system is introduced and there are treated the reconfiguration problems. There is analyzed the reconfigurable control system and it is motivated the need for reconfiguration in motor control. The control of the induction motor fed by the...
In recent years, studies about walking motion of biped robots have been developed rapidly. In many researches, biped robots are often treated as inverted pendulums since the structure of biped robots are very complicated. This simplification makes trajectory planning for a biped robot easy. An inverted pendulum model, however, gives some constraints to the robot. Walking motion using one kind of inverted...
The paper deals with the presentation of a complete measurement automation system (MAS) implemented in an Aluminium Electrolytic Capacitor Development Laboratory at EPCOS Hungary. The main role of the MAS is to facilitate the electrolyte and capacitor research and development, through the automation of the related measurement tasks, and to provide a powerful database system background for data retrieval...
Proposed here paper describes coaxial power transformer with tubular linear windings for high frequency applications. Description of design and power properties of transformer are included. Properties were obtained by FEM calculations using 2D ANSYS software and by measurements based on calorimetric method. Performed analysis shows very good properties of transformer in high frequency power conversion...
Mobile robot localization is the problem of determining the pose (position and orientation) of a mobile robot under complex measurement uncertainties. The algorithm introduced here is based on the modified multiple model and exploits a soft gating of the measurements to reduce the computational requirements of the approach. The position part is based on an x and y histograms scan matching procedure,...
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