1,481 research outputs found
Determination of the input filter parameters of the active rectifier with a fixed modulation frequency
Goal. Development of a methodology for calculating the parameters of the active rectifier-voltage source input filter operating with a fixed modulation frequency to ensure electromagnetic compatibility with the supply network acceptable by standards at minimum values of the input inductance and checking its main characteristics on a mathematical model. Methodology. The authors have developed a methodology for calculating the parameters of the input filter of an active rectifier-voltage source. The calculation results are verified on the constructed mathematical model of a frequency converter, the scheme of which is an active rectifier and an autonomous voltage inverter. A series of experiments was carried out on a mathematical model to study the dependence of the total harmonic distortion of current and mains voltage on the value of the input inductance for various parameters of the input filter. Results. The structure and calculation procedure the input filter of an active rectifier operating with a fixed modulation frequency are proposed. The simulation results showed that the inclusion of a filter at the input of the active rectifier significantly improves its electromagnetic compatibility with the supply network in the entire range of variation of the input inductance of the circuit and makes it possible to achieve the values of the total harmonic distortion permissible by the norms. Originality. A structure and a calculation procedure the input filter of an active rectifier-voltage source operating with a fixed modulation frequency are proposed. Practical significance. The dependencies obtained in the article allow us to evaluate the relationship between the parameters of the filter elements and its characteristics among themselves and come to a compromise between them when designing a scheme for specific technical conditions.Π ΡΡΠ°ΡΡΡ Π·Π°ΠΏΡΠΎΠΏΠΎΠ½ΠΎΠ²Π°Π½ΠΎ ΡΡΡΡΠΊΡΡΡΡ ΡΠ° ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΡ ΡΠΎΠ·ΡΠ°Ρ
ΡΠ½ΠΊΡ Π²Ρ
ΡΠ΄Π½ΠΎΠ³ΠΎ ΡΡΠ»ΡΡΡΡ Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ Π²ΠΈΠΏΡΡΠΌΠ»ΡΡΠ°-Π΄ΠΆΠ΅ΡΠ΅Π»Π° Π½Π°ΠΏΡΡΠ³ΠΈ, ΡΠΊΠΈΠΉ ΠΏΡΠ°ΡΡΡ Π· ΡΡΠΊΡΠΎΠ²Π°Π½ΠΎΡ ΡΠ°ΡΡΠΎΡΠΎΡ ΠΌΠΎΠ΄ΡΠ»ΡΡΡΡ. ΠΡΡΠΈΠΌΠ°Π½Ρ Π·Π°Π»Π΅ΠΆΠ½ΠΎΡΡΡ Π΄ΠΎΠ·Π²ΠΎΠ»ΡΡΡΡ ΠΎΡΡΠ½ΠΈΡΠΈ Π²Π·Π°ΡΠΌΠΎΠ·Π²'ΡΠ·ΠΎΠΊ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡΠ² Π΅Π»Π΅ΠΌΠ΅Π½ΡΡΠ² ΡΡΠ»ΡΡΡΠ° ΡΠ° ΠΉΠΎΠ³ΠΎ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΠΌΡΠΆ ΡΠΎΠ±ΠΎΡ ΡΠ° Π΄ΡΠΉΡΠΈ ΠΊΠΎΠΌΠΏΡΠΎΠΌΡΡΡ ΠΌΡΠΆ Π½ΠΈΠΌΠΈ ΠΏΡΠ΄ ΡΠ°Ρ ΠΏΡΠΎΠ΅ΠΊΡΡΠ²Π°Π½Π½Ρ ΡΡ
Π΅ΠΌΠΈ Π΄Π»Ρ ΠΊΠΎΠ½ΠΊΡΠ΅ΡΠ½ΠΈΡ
ΡΠ΅Ρ
Π½ΡΡΠ½ΠΈΡ
ΡΠΌΠΎΠ². Π Π΅Π·ΡΠ»ΡΡΠ°ΡΠΈ ΠΌΠΎΠ΄Π΅Π»ΡΠ²Π°Π½Π½Ρ ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΈ, ΡΠΎ Π²ΠΊΠ»ΡΡΠ΅Π½Π½Ρ Π΄ΠΎΠ΄Π°ΡΠΊΠΎΠ²ΠΎΠ³ΠΎ Π»Π°Π½ΡΡΠ³Π° RC ΡΡΠ»ΡΡΡΠ° Π½Π° Π²Ρ
ΠΎΠ΄Ρ Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ Π²ΠΈΠΏΡΡΠΌΠ»ΡΡΠ° ΡΡΡΠΎΡΠ½ΠΎ ΠΏΠΎΠΊΡΠ°ΡΡΡ ΠΉΠΎΠ³ΠΎ Π΅Π»Π΅ΠΊΡΡΠΎΠΌΠ°Π³Π½ΡΡΠ½Ρ ΡΡΠΌΡΡΠ½ΡΡΡΡ Π· ΠΌΠ΅ΡΠ΅ΠΆΠ΅Ρ ΠΆΠΈΠ²Π»Π΅Π½Π½Ρ Ρ Π²ΡΡΠΎΠΌΡ Π΄ΡΠ°ΠΏΠ°Π·ΠΎΠ½Ρ Π·ΠΌΡΠ½ΠΈ Π²Ρ
ΡΠ΄Π½ΠΎΡ ΡΠ½Π΄ΡΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΡ
Π΅ΠΌΠΈ ΡΠ° Π΄ΠΎΠ·Π²ΠΎΠ»ΡΡ Π΄ΠΎΡΡΠ³Π°ΡΠΈ Π΄ΠΎΠΏΡΡΡΠΈΠΌΠΈΡ
Π½ΠΎΡΠΌΠ°ΠΌΠΈ Π·Π½Π°ΡΠ΅Π½Ρ ΡΡΠΌΠ°ΡΠ½ΠΎΠ³ΠΎ ΠΊΠΎΠ΅ΡΡΡΡΡΠ½ΡΡ Π³Π°ΡΠΌΠΎΠ½ΡΡΠ½ΠΈΡ
ΡΠΏΠΎΡΠ²ΠΎΡΠ΅Π½Ρ
A Design of a Material Assembly in Space-Time Generating and Storing Energy
The paper introduces a theoretical background of the mechanism of electromagnetic energy and power accumulation and its focusing in narrow pulses travelling along a transmission line with material parameters variable in 1D-space and time. This mechanism may be implemented due to a special material geometry- a distribution of two different dielectrics in a spatio-temporal checkerboard. We concentrate on the practically reasonable means to bring this mechanism into action in a device that may work both as energy generator and energy storage. The basic ideas discussed below appear to be fairly general; we have chosen their electromagnetic implementation as an excellent framework for the entire concept
Non-affine geometrization can lead to nonphysical instabilities
Geometrization of dynamics consists of representing trajectories by geodesics
on a configuration space with a suitably defined metric. Previously, efforts
were made to show that the analysis of dynamical stability can also be carried
out within geometrical frameworks, by measuring the broadening rate of a bundle
of geodesics. Two known formalisms are via Jacobi and Eisenhart metrics. We
find that this geometrical analysis measures the actual stability when the
length of any geodesic is proportional to the corresponding time interval. We
prove that the Jacobi metric is not always an appropriate parametrization by
showing that it predicts chaotic behavior for a system of harmonic oscillators.
Furthermore, we show, by explicit calculation, that the correspondence between
dynamical- and geometrical-spread is ill-defined for the Jacobi metric. We find
that the Eisenhart dynamics corresponds to the actual tangent dynamics and is
therefore an appropriate geometrization scheme.Comment: Featured on the Cover of the Journal. 9 pages, 6 figures:
http://iopscience.iop.org/1751-8121/48/7/07510
ΠΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΠ°Π±ΠΎΡΡ Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΡΠΏΡΠ°Π²Π»ΡΠ΅ΠΌΠΎΠ³ΠΎ Π²ΡΠΏΡΡΠΌΠΈΡΠ΅Π»Ρ Π² ΡΠ΅ΠΆΠΈΠΌΠ΅ ΠΈΡΠΊΠ°ΠΆΠ΅Π½ΠΈΡ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ ΠΏΠΈΡΠ°ΡΡΠ΅ΠΉ ΡΠ΅ΡΠΈ
Goal. Checking the efficiency of the active rectifier with differences types of control systems in conditions of deep voltage distortions of a three-phase three-wire supply network. Methodology. The authors have used the Matlab/Simulink software environment to create a model of an active rectifier with various types of control systems as part of a frequency electric drive. We performed a series of simulations of the operating modes of an active rectifier with various control systems when the supply voltage is distorted. Results. When the active rectifier is operating in an unregulated mode, the distortions of the current and mains voltage exceed the maximum permissible values. The quality indicators of the mains current and mains voltage are significantly higher than the normally permissible values. In the absence of voltage distortions in the supply network, the operation of the active rectifier can effectively eliminate the distortions of the mains current, regardless of the type of control system of the active rectifier. In conditions of deep distortions of the supply network voltage, the operation of an active rectifier with a vector control system is more efficient than with a parametric control system. Originality. Criteria for determining the quality of consumed electricity at the connection point of the circuit are proposed. Practical significance. Recommendations have been developed for the use of active rectifier control systems when working with a distorted power supply voltage.Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½Π° ΡΠ°Π±ΠΎΡΠ° Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΡΠΏΡΠ°Π²Π»ΡΠ΅ΠΌΠΎΠ³ΠΎ Π²ΡΠΏΡΡΠΌΠΈΡΠ΅Π»Ρ-ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠ° Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ (ΠΠΠΠ) Ρ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΈ Π²Π΅ΠΊΡΠΎΡΠ½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΠ°ΠΌΠΈ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ, ΡΠ°Π±ΠΎΡΠ°ΡΡΠΈΡ
Ρ ΡΠΈΠΊΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ ΡΠ°ΡΡΠΎΡΠΎΠΉ ΠΌΠΎΠ΄ΡΠ»ΡΡΠΈΠΈ Π² ΡΠΎΡΡΠ°Π²Π΅ ΡΠ»Π΅ΠΊΡΡΠΎΠΏΡΠΈΠ²ΠΎΠ΄Π° ΠΌΠΎΡΠ½ΠΎΡΡΡΡ 315 ΠΊΠΡ ΠΏΠ°ΡΠ°Π»Π»Π΅Π»ΡΠ½ΠΎ Ρ Π΄ΡΡΠ³ΠΈΠΌΠΈ Π½Π°Π³ΡΡΠ·ΠΊΠ°ΠΌΠΈ Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
ΠΈΡΠΊΠ°ΠΆΡΠ½Π½ΠΎΠ³ΠΎ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠ° ΠΏΠΈΡΠ°Π½ΠΈΡ. ΠΡΠΏΠΎΠ»Π½Π΅Π½ΠΎ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ΅ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΠΠΠ Ρ ΡΠ°Π·Π»ΠΈΡΠ½ΡΠΌΠΈ ΡΠΈΡΡΠ΅ΠΌΠ°ΠΌΠΈ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ. ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Ρ ΠΊΡΠΈΡΠ΅ΡΠΈΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΠΊΠ°ΡΠ΅ΡΡΠ²Π° ΠΏΠΎΡΡΠ΅Π±Π»ΡΠ΅ΠΌΠΎΠΉ ΡΠ»Π΅ΠΊΡΡΠΎΡΠ½Π΅ΡΠ³ΠΈΠΈ Π² ΡΠΎΡΠΊΠ΅ ΠΏΠΎΠ΄ΠΊΠ»ΡΡΠ΅Π½ΠΈΡ ΡΡ
Π΅ΠΌΡ. Π Π°Π·ΡΠ°Π±ΠΎΡΠ°Π½Ρ ΡΠ΅ΠΊΠΎΠΌΠ΅Π½Π΄Π°ΡΠΈΠΈ ΠΏΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΡΠΈΡΡΠ΅ΠΌ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΠΠΠ ΠΏΡΠΈ ΡΠ°Π±ΠΎΡΠ΅ Ρ ΠΈΡΠΊΠ°ΠΆΡΠ½Π½ΡΠΌ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΠ΅ΠΌ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠ° ΠΏΠΈΡΠ°Π½ΠΈΡ
The efficiency of the active controlled rectifier operation in the mains voltage distortion mode
Goal. Checking the efficiency of the active rectifier with differences types of control systems in conditions of deep voltage distortions of a three-phase three-wire supply network. Methodology. The authors have used the Matlab/Simulink software environment to create a model of an active rectifier with various types of control systems as part of a frequency electric drive. We performed a series of simulations of the operating modes of an active rectifier with various control systems when the supply voltage is distorted. Results. When the active rectifier is operating in an unregulated mode, the distortions of the current and mains voltage exceed the maximum permissible values. The quality indicators of the mains current and mains voltage are significantly higher than the normally permissible values. In the absence of voltage distortions in the supply network, the operation of the active rectifier can effectively eliminate the distortions of the mains current, regardless of the type of control system of the active rectifier. In conditions of deep distortions of the supply network voltage, the operation of an active rectifier with a vector control system is more efficient than with a parametric control system. Originality. Criteria for determining the quality of consumed electricity at the connection point of the circuit are proposed. Practical significance. Recommendations have been developed for the use of active rectifier control systems when working with a distorted power supply voltage
Modeling Parame ters of Dividend Policy in the Context-Ne utral Approach to its Im pleme ntation
The article is devoted to the consideration of the conceptual foundations of the formalized modeling of dividend policy indicators and derived indicators of market activity (position on the securities market) of a company as part of a neutral approach to the implementation of its dividend policy as a tool for analysis and forecasting of these indicators. The methodological basis of the study was the dividend irrelevance theory, the theory of dividend policy materiality and the concept of sustainable development of a company. It is shown that the formalization of the idea of a neutral approach to the implementation of dividend policy involves the construction of appropriate models of such important indicators characterizing the dividend policy and market activity of the company as the dividend yield coefficient, dividend coverage ratio, the expected price of an ordinary share, dividend yield of an ordinary share and the coefficient of quotation of an ordinary share (the ratio of price and profit per ordinary share). The constructed formalized models of the above indicators can be used in predictive and analytical estimates of the values of these indicators, and also allow one to identify the reasons for their deviation by calculating the impact on it of the determining factors contained in these models, performed by appropriate methods of factor analysis, as part of a neutral approach to the implementation of the dividend policy of the company. The author comes to a conclusion that the developed formal models of the most important indicators of dividend policy and derived indicators of market activity of the company are an effective tool for their analysis and forecasting, providing effective decisions on the management of dividend policy of the company choosing a neutral approach to its implementation.Π‘ΡΠ°ΡΡΡ ΠΏΠΎΡΠ²ΡΡΠ΅Π½Π° ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½ΠΈΡ ΠΊΠΎΠ½ΡΠ΅ΠΏΡΡΠ°Π»ΡΠ½ΡΡ
ΠΎΡΠ½ΠΎΠ² ΡΠΎΡΠΌΠ°Π»ΠΈΠ·ΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ Π΄ΠΈΠ²ΠΈΠ΄Π΅Π½Π΄Π½ΠΎΠΉ ΠΏΠΎΠ»ΠΈΡΠΈΠΊΠΈ ΠΈ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄Π½ΡΡ
ΠΎΡ Π½ΠΈΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ ΡΡΠ½ΠΎΡΠ½ΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ (ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΡ Π½Π° ΡΡΠ½ΠΊΠ΅ ΡΠ΅Π½Π½ΡΡ
Π±ΡΠΌΠ°Π³) ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΠΈ Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
Π½Π΅ΠΉΡΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄Π° ΠΊ ΠΎΡΡΡΠ΅ΡΡΠ²Π»Π΅Π½ΠΈΡ Π΅Π΅ Π΄ΠΈΠ²ΠΈΠ΄Π΅Π½Π΄Π½ΠΎΠΉ ΠΏΠΎΠ»ΠΈΡΠΈΠΊΠΈ ΠΊΠ°ΠΊ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠ° Π°Π½Π°Π»ΠΈΠ·Π° ΠΈ ΠΏΡΠΎΠ³Π½ΠΎΠ·ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π΄Π°Π½Π½ΡΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ. ΠΠ΅ΡΠΎΠ΄ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΡΡ ΠΎΡΠ½ΠΎΠ²Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΠΎΡΡΠ°Π²ΠΈΠ»ΠΈ ΡΠ΅ΠΎΡΠΈΡ ΠΈΡΡΠ΅Π»Π΅Π²Π°Π½ΡΠ½ΠΎΡΡΠΈ Π΄ΠΈΠ²ΠΈΠ΄Π΅Π½Π΄ΠΎΠ², ΡΠ΅ΠΎΡΠΈΡ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎΡΡΠΈ Π΄ΠΈΠ²ΠΈΠ΄Π΅Π½Π΄Π½ΠΎΠΉ ΠΏΠΎΠ»ΠΈΡΠΈΠΊΠΈ ΠΈ ΠΊΠΎΠ½ΡΠ΅ΠΏΡΠΈΡ ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΠ³ΠΎ ΡΠ°Π·Π²ΠΈΡΠΈΡ ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΠΈ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΡΠΎΡΠΌΠ°Π»ΠΈΠ·Π°ΡΠΈΡ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΎ Π½Π΅ΠΉΡΡΠ°Π»ΡΠ½ΠΎΠΌ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄Π΅ ΠΊ ΠΎΡΡΡΠ΅ΡΡΠ²Π»Π΅Π½ΠΈΡ Π΄ΠΈΠ²ΠΈΠ΄Π΅Π½Π΄Π½ΠΎΠΉ ΠΏΠΎΠ»ΠΈΡΠΈΠΊΠΈ ΠΏΡΠ΅Π΄ΠΏΠΎΠ»Π°Π³Π°Π΅Ρ ΠΏΠΎΡΡΡΠΎΠ΅Π½ΠΈΡ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΡΡΡΠΈΡ
Π΅ΠΌΡ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΡΠ°ΠΊΠΈΡ
Π²Π°ΠΆΠ½Π΅ΠΉΡΠΈΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ, Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΡΡΠΈΡ
Π΄ΠΈΠ²ΠΈΠ΄Π΅Π½Π΄Π½ΡΡ ΠΏΠΎΠ»ΠΈΡΠΈΠΊΡ ΠΈ ΡΡΠ½ΠΎΡΠ½ΡΡ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΠΈ, ΠΊΠ°ΠΊ ΠΊΠΎΡΡΡΠΈΡΠΈΠ΅Π½Ρ Π΄ΠΈΠ²ΠΈΠ΄Π΅Π½Π΄Π½ΠΎΠ³ΠΎ Π²ΡΡ
ΠΎΠ΄Π°, ΠΊΠΎΡΡΡΠΈΡΠΈΠ΅Π½Ρ Π΄ΠΈΠ²ΠΈΠ΄Π΅Π½Π΄Π½ΠΎΠ³ΠΎ ΠΏΠΎΠΊΡΡΡΠΈΡ, ΠΎΠΆΠΈΠ΄Π°Π΅ΠΌΠ°Ρ ΡΠ΅Π½Π° ΠΎΠ±ΡΠΊΠ½ΠΎΠ²Π΅Π½Π½ΠΎΠΉ Π°ΠΊΡΠΈΠΈ, Π΄ΠΈΠ²ΠΈΠ΄Π΅Π½Π΄Π½Π°Ρ Π΄ΠΎΡ
ΠΎΠ΄Π½ΠΎΡΡΡ ΠΎΠ±ΡΠΊΠ½ΠΎΠ²Π΅Π½Π½ΠΎΠΉ Π°ΠΊΡΠΈΠΈ ΠΈ ΠΊΠΎΡΡΡΠΈΡΠΈΠ΅Π½Ρ ΠΊΠΎΡΠΈΡΡΠ΅ΠΌΠΎΡΡΠΈ ΠΎΠ±ΡΠΊΠ½ΠΎΠ²Π΅Π½Π½ΠΎΠΉ Π°ΠΊΡΠΈΠΈ (ΡΠΎΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠ΅ ΡΠ΅Π½Ρ ΠΈ ΠΏΡΠΈΠ±ΡΠ»ΠΈ Π½Π° ΠΎΠ±ΡΠΊΠ½ΠΎΠ²Π΅Π½Π½ΡΡ Π°ΠΊΡΠΈΡ). ΠΠΎΡΡΡΠΎΠ΅Π½Π½ΡΠ΅ ΡΠΎΡΠΌΠ°Π»ΠΈΠ·ΠΎΠ²Π°Π½Π½ΡΠ΅ ΠΌΠΎΠ΄Π΅Π»ΠΈ ΠΏΠ΅ΡΠ΅ΡΠΈΡΠ»Π΅Π½Π½ΡΡ
Π²ΡΡΠ΅ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Ρ Π² ΠΏΡΠΎΠ³Π½ΠΎΠ·Π½ΠΎ-Π°Π½Π°Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΎΡΠ΅Π½ΠΊΠ°Ρ
Π·Π½Π°ΡΠ΅Π½ΠΈΠΉ ΡΡΠΈΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ, Π° ΡΠ°ΠΊΠΆΠ΅ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡΡ Π²ΡΡΠ²Π»ΡΡΡ ΠΏΡΠΈΡΠΈΠ½Ρ ΠΈΡ
ΠΎΡΠΊΠ»ΠΎΠ½Π΅Π½ΠΈΡ ΠΏΠΎΡΡΠ΅Π΄ΡΡΠ²ΠΎΠΌ ΡΠ°ΡΡΠ΅ΡΠ° Π²Π»ΠΈΡΠ½ΠΈΡ Π½Π° Π½Π΅Π³ΠΎ ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΡ
ΡΡ Π² ΡΡΠΈΡ
ΠΌΠΎΠ΄Π΅Π»ΡΡ
ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΡΡΠΈΡ
ΡΠ°ΠΊΡΠΎΡΠΎΠ², Π²ΡΠΏΠΎΠ»Π½ΡΠ΅ΠΌΠΎΠ³ΠΎ ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΡΡΡΠΈΠΌΠΈ ΠΌΠ΅ΡΠΎΠ΄Π°ΠΌΠΈ ΡΠ°ΠΊΡΠΎΡΠ½ΠΎΠ³ΠΎ Π°Π½Π°Π»ΠΈΠ·Π°, Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
Π½Π΅ΠΉΡΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄Π° ΠΊ ΠΎΡΡΡΠ΅ΡΡΠ²Π»Π΅Π½ΠΈΡ Π΄ΠΈΠ²ΠΈΠ΄Π΅Π½Π΄Π½ΠΎΠΉ ΠΏΠΎΠ»ΠΈΡΠΈΠΊΠΈ ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΠΈ. ΠΠ²ΡΠΎΡ ΠΏΡΠΈΡ
ΠΎΠ΄ΠΈΡ ΠΊ Π²ΡΠ²ΠΎΠ΄Ρ, ΡΡΠΎ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠ°Π½Π½ΡΠ΅ ΠΈΠΌ ΡΠΎΡΠΌΠ°Π»ΠΈΠ·ΠΎΠ²Π°Π½Π½ΡΠ΅ ΠΌΠΎΠ΄Π΅Π»ΠΈ Π²Π°ΠΆΠ½Π΅ΠΉΡΠΈΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ Π΄ΠΈΠ²ΠΈΠ΄Π΅Π½Π΄Π½ΠΎΠΉ ΠΏΠΎΠ»ΠΈΡΠΈΠΊΠΈ ΠΈ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄Π½ΡΡ
ΠΎΡ Π½ΠΈΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ ΡΡΠ½ΠΎΡΠ½ΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΠΈ ΡΠ²Π»ΡΡΡΡΡ Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎ Π΄Π΅ΠΉΡΡΠ²Π΅Π½Π½ΡΠΌ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠΎΠΌ ΠΈΡ
Π°Π½Π°Π»ΠΈΠ·Π° ΠΈ ΠΏΡΠΎΠ³Π½ΠΎΠ·ΠΈΡΠΎΠ²Π°Π½ΠΈΡ, ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠΈΠ²Π°Ρ ΠΏΡΠΈΠ½ΡΡΠΈΠ΅ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΡΡ
ΡΠ΅ΡΠ΅Π½ΠΈΠΉ ΠΏΠΎ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ Π΄ΠΈΠ²ΠΈΠ΄Π΅Π½Π΄Π½ΠΎΠΉ ΠΏΠΎΠ»ΠΈΡΠΈΠΊΠΎΠΉ ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΠΈ Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
Π½Π΅ΠΉΡΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄Π° ΠΊ Π΅Π΅ ΠΎΡΡΡΠ΅ΡΡΠ²Π»Π΅Π½ΠΈΡ
ΠΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΠ°Π±ΠΎΡΡ Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΡΠΏΡΠ°Π²Π»ΡΠ΅ΠΌΠΎΠ³ΠΎ Π²ΡΠΏΡΡΠΌΠΈΡΠ΅Π»Ρ Π² ΡΠ΅ΠΆΠΈΠΌΠ΅ ΠΈΡΠΊΠ°ΠΆΠ΅Π½ΠΈΡ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ ΠΏΠΈΡΠ°ΡΡΠ΅ΠΉ ΡΠ΅ΡΠΈ
Goal. Checking the efficiency of the active rectifier with differences types of control systems in conditions of deep voltage distortions of a three-phase three-wire supply network. Methodology. The authors have used the Matlab/Simulink software environment to create a model of an active rectifier with various types of control systems as part of a frequency electric drive. We performed a series of simulations of the operating modes of an active rectifier with various control systems when the supply voltage is distorted. Results. When the active rectifier is operating in an unregulated mode, the distortions of the current and mains voltage exceed the maximum permissible values. The quality indicators of the mains current and mains voltage are significantly higher than the normally permissible values. In the absence of voltage distortions in the supply network, the operation of the active rectifier can effectively eliminate the distortions of the mains current, regardless of the type of control system of the active rectifier. In conditions of deep distortions of the supply network voltage, the operation of an active rectifier with a vector control system is more efficient than with a parametric control system. Originality. Criteria for determining the quality of consumed electricity at the connection point of the circuit are proposed. Practical significance. Recommendations have been developed for the use of active rectifier control systems when working with a distorted power supply voltage.Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½Π° ΡΠ°Π±ΠΎΡΠ° Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΡΠΏΡΠ°Π²Π»ΡΠ΅ΠΌΠΎΠ³ΠΎ Π²ΡΠΏΡΡΠΌΠΈΡΠ΅Π»Ρ-ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠ° Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ (ΠΠΠΠ) Ρ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΈ Π²Π΅ΠΊΡΠΎΡΠ½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΠ°ΠΌΠΈ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ, ΡΠ°Π±ΠΎΡΠ°ΡΡΠΈΡ
Ρ ΡΠΈΠΊΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ ΡΠ°ΡΡΠΎΡΠΎΠΉ ΠΌΠΎΠ΄ΡΠ»ΡΡΠΈΠΈ Π² ΡΠΎΡΡΠ°Π²Π΅ ΡΠ»Π΅ΠΊΡΡΠΎΠΏΡΠΈΠ²ΠΎΠ΄Π° ΠΌΠΎΡΠ½ΠΎΡΡΡΡ 315 ΠΊΠΡ ΠΏΠ°ΡΠ°Π»Π»Π΅Π»ΡΠ½ΠΎ Ρ Π΄ΡΡΠ³ΠΈΠΌΠΈ Π½Π°Π³ΡΡΠ·ΠΊΠ°ΠΌΠΈ Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
ΠΈΡΠΊΠ°ΠΆΡΠ½Π½ΠΎΠ³ΠΎ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠ° ΠΏΠΈΡΠ°Π½ΠΈΡ. ΠΡΠΏΠΎΠ»Π½Π΅Π½ΠΎ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ΅ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΠΠΠ Ρ ΡΠ°Π·Π»ΠΈΡΠ½ΡΠΌΠΈ ΡΠΈΡΡΠ΅ΠΌΠ°ΠΌΠΈ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ. ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Ρ ΠΊΡΠΈΡΠ΅ΡΠΈΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΠΊΠ°ΡΠ΅ΡΡΠ²Π° ΠΏΠΎΡΡΠ΅Π±Π»ΡΠ΅ΠΌΠΎΠΉ ΡΠ»Π΅ΠΊΡΡΠΎΡΠ½Π΅ΡΠ³ΠΈΠΈ Π² ΡΠΎΡΠΊΠ΅ ΠΏΠΎΠ΄ΠΊΠ»ΡΡΠ΅Π½ΠΈΡ ΡΡ
Π΅ΠΌΡ. Π Π°Π·ΡΠ°Π±ΠΎΡΠ°Π½Ρ ΡΠ΅ΠΊΠΎΠΌΠ΅Π½Π΄Π°ΡΠΈΠΈ ΠΏΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΡΠΈΡΡΠ΅ΠΌ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΠΠΠ ΠΏΡΠΈ ΡΠ°Π±ΠΎΡΠ΅ Ρ ΠΈΡΠΊΠ°ΠΆΡΠ½Π½ΡΠΌ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΠ΅ΠΌ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠ° ΠΏΠΈΡΠ°Π½ΠΈΡ
ΠΠΊΡΠΈΠ²Π½ΠΈΠΉ Π²ΠΈΠΏΡΡΠΌΠ»ΡΡ Π· ΡΡΠΊΡΠΎΠ²Π°Π½ΠΎΡ ΡΠ°ΡΡΠΎΡΠΎΡ ΠΌΠΎΠ΄ΡΠ»ΡΡΡΡ ΡΠ° Π²Π΅ΠΊΡΠΎΡΠ½ΠΎΡ ΡΠΈΡΡΠ΅ΠΌΠΎΡ ΡΠΏΡΠ°Π²Π»ΡΠ½Π½Ρ Π² ΡΠ΅ΠΆΠΈΠΌΡ Π΄Π²ΠΎΠ½Π°ΠΏΡΠ°Π²Π»Π΅Π½ΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΠΊΡ Π΅Π½Π΅ΡΠ³ΡΡ
Goal. Creation of a vector control system with improved characteristics for an active rectifier-voltage source operating in the bidirectional energy flow mode with a with a fixed modulation frequency. Methodology. The physical prerequisites for the active rectifier - voltage source operation in the system of a medium-power frequency electric drive are considered. A vector control system with a fixed modulation frequency is constructed, the principles of forming the signals acting in it and the influence on its operation of the converter power circuit parameters and the power consumed by it are considered. Mathematical modeling of the converter with the developed control system in MATLAB/Simulink made it possible to verify the correctness of the operation of the power circuit and the control system. Results. A new structure of a vector control system operating with a fixed modulation frequency is proposed, and the performance characteristics of the circuit in a wide range of changes in the magnitude and sign of the output power are obtained. The advantages of the new control system over the existing ones are shown. Originality. The physical prerequisites for the functioning of the power scheme and the vector control system of the ARVS proposed by the authors with a fixed frequency of modulation, the principles of forming the signals operating within it are considered in detail. Practical significance. New structure of the vector control system operating with a fixed modulation frequency is proposed and the advantages of the new control system over the existing ones are shown.Π ΡΡΠ°ΡΡΡ ΡΠΎΠ·Π³Π»ΡΠ½ΡΡΠΎ ΡΠΎΠ±ΠΎΡΡ Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ Π²ΠΈΠΏΡΡΠΌΠ»ΡΡΠ°-Π΄ΠΆΠ΅ΡΠ΅Π»Π° Π½Π°ΠΏΡΡΠ³ΠΈ, ΡΠΎ ΠΏΡΠ°ΡΡΡ Π· ΡΡΠΊΡΠΎΠ²Π°Π½ΠΎΡ ΡΠ°ΡΡΠΎΡΠΎΡ ΠΌΠΎΠ΄ΡΠ»ΡΡΡΡ Π² ΡΠ΅ΠΆΠΈΠΌΡ Π΄Π²ΠΎΠ½Π°ΠΏΡΠ°Π²Π»Π΅Π½ΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΠΊΡ Π΅Π½Π΅ΡΠ³ΡΡ, Π·Π°ΠΏΡΠΎΠΏΠΎΠ½ΠΎΠ²Π°Π½ΠΎ Π½ΠΎΠ²Ρ ΡΡΡΡΠΊΡΡΡΡ Π²Π΅ΠΊΡΠΎΡΠ½ΠΎΡ ΡΠΈΡΡΠ΅ΠΌΠΈ ΡΠΏΡΠ°Π²Π»ΡΠ½Π½Ρ, ΡΠ° ΠΎΡΡΠΈΠΌΠ°Π½ΠΎ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ ΡΠΎΠ±ΠΎΡΠΈ ΡΡ
Π΅ΠΌΠΈ Π² ΡΠΈΡΠΎΠΊΠΎΠΌΡ Π΄ΡΠ°ΠΏΠ°Π·ΠΎΠ½Ρ Π·ΠΌΡΠ½ΠΈ Π²Π΅Π»ΠΈΡΠΈΠ½ΠΈ ΡΠ° Π·Π½Π°ΠΊΡ Π²ΠΈΡ
ΡΠ΄Π½ΠΎΡ ΠΏΠΎΡΡΠΆΠ½ΠΎΡΡΡ. Π ΠΎΠ·Π³Π»ΡΠ½ΡΡΡ ΡΡΠ·ΠΈΡΠ½Ρ ΠΏΠ΅ΡΠ΅Π΄ΡΠΌΠΎΠ²ΠΈ ΡΡΠ½ΠΊΡΡΠΎΠ½ΡΠ²Π°Π½Π½Ρ ΡΠΈΠ»ΠΎΠ²ΠΎΡ ΡΡ
Π΅ΠΌΠΈ ΠΠΠΠ, Π·Π°ΠΏΡΠΎΠΏΠΎΠ½ΠΎΠ²Π°Π½ΠΎΡ Π°Π²ΡΠΎΡΠ°ΠΌΠΈ Π²Π΅ΠΊΡΠΎΡΠ½ΠΎΡ ΡΠΈΡΡΠ΅ΠΌΠΈ ΡΠΏΡΠ°Π²Π»ΡΠ½Π½Ρ ΡΠ° ΠΏΡΠΈΠ½ΡΠΈΠΏΠΈ ΡΠΎΡΠΌΡΠ²Π°Π½Π½Ρ Π΄ΡΡΡΠΈΡ
ΡΡΠ΅ΡΠ΅Π΄ΠΈΠ½Ρ Π½Π΅Ρ ΡΠΈΠ³Π½Π°Π»ΡΠ² Π² ΡΠΊΠ»Π°Π΄Ρ ΡΠ°ΡΡΠΎΡΠ½ΠΎΠ³ΠΎ ΠΏΠ΅ΡΠ΅ΡΠ²ΠΎΡΡΠ²Π°ΡΠ° ΡΠ΅ΡΠ΅Π΄Π½ΡΠΎΡ ΠΏΠΎΡΡΠΆΠ½ΠΎΡΡΡ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ ΠΏΠ΅ΡΠ΅Π²Π°Π³ΠΈ Π½ΠΎΠ²ΠΎΡ ΡΠΈΡΡΠ΅ΠΌΠΈ ΡΠΏΡΠ°Π²Π»ΡΠ½Π½Ρ Π½Π°Π΄ ΡΡΠ½ΡΡΡΠΈΠΌΠΈ ΡΠ° ΠΎΡΡΠΈΠΌΠ°Π½ΠΎ Π·Π°Π»Π΅ΠΆΠ½ΠΎΡΡΡ, ΡΠΎ Π΄Π΅ΠΌΠΎΠ½ΡΡΡΡΡΡΡ ΠΊΠΎΡΠ΅ΠΊΡΠ½ΡΡΡΡ Π·Π°ΡΡΠΎΡΡΠ²Π°Π½Π½Ρ Π·Π°ΠΏΡΠΎΠΏΠΎΠ½ΠΎΠ²Π°Π½ΠΈΡ
Ρ ΡΡΠ°ΡΡΡ ΡΠ΅Ρ
Π½ΡΡΠ½ΠΈΡ
ΡΡΡΠ΅Π½Ρ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΠΈ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄Π΅Π»ΡΠ²Π°Π½Π½Ρ ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΈ, ΡΠΎ ΠΠΠΠ, ΡΠΊΠΈΠΉ ΠΏΡΠ°ΡΡΡ Π· ΡΡΠΊΡΠΎΠ²Π°Π½ΠΎΡ ΡΠ°ΡΡΠΎΡΠΎΡ ΠΌΠΎΠ΄ΡΠ»ΡΡΡΡ ΡΠ° Π·Π°ΠΏΡΠΎΠΏΠΎΠ½ΠΎΠ²Π°Π½ΠΎΡ ΡΠΈΡΡΠ΅ΠΌΠΎΡ ΡΠΏΡΠ°Π²Π»ΡΠ½Π½Ρ, Π΄ΠΎΠ·Π²ΠΎΠ»ΡΡ ΠΏΡΠ΄ΡΡΠΈΠΌΡΠ²Π°ΡΠΈ Π·Π°Π΄Π°Π½Π΅ Π·Π½Π°ΡΠ΅Π½Π½Ρ Π²ΠΈΡ
ΡΠ΄Π½ΠΎΡ Π½Π°ΠΏΡΡΠ³ΠΈ ΡΠ° Π±Π»ΠΈΠ·ΡΠΊΠΈΠΉ Π΄ΠΎ ΡΠΈΠ½ΡΡΠΎΡΠ΄ΠΈ ΡΡΡΡΠΌ ΠΌΠ΅ΡΠ΅ΠΆΡ ΠΆΠΈΠ²Π»Π΅Π½Π½Ρ ΠΏΡΠΈ Π½ΡΠ»ΡΠΎΠ²ΠΎΠΌΡ ΡΠΏΠΎΠΆΠΈΠ²Π°Π½Π½Ρ ΡΠ΅Π°ΠΊΡΠΈΠ²Π½ΠΎΡ ΠΏΠΎΡΡΠΆΠ½ΠΎΡΡΡ Π² ΡΡΡΠ°Π»Π΅Π½ΠΎΠΌΡ ΡΠ΅ΠΆΠΈΠΌΡ Π² ΡΠΈΡΠΎΠΊΠΎΠΌΡ Π΄ΡΠ°ΠΏΠ°Π·ΠΎΠ½Ρ Π·ΠΌΡΠ½ΠΈ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡΠ² ΡΡ
Π΅ΠΌΠΈ ΡΠ° Π²Π΅Π»ΠΈΡΠΈΠ½ΠΈ Ρ Π·Π½Π°ΠΊΡ ΠΏΠΎΡΡΠΆΠ½ΠΎΡΡΡ Π½Π°Π²Π°Π½ΡΠ°ΠΆΠ΅Π½Π½Ρ
On the Green function of linear evolution equations for a region with a boundary
We derive a closed-form expression for the Green function of linear evolution
equations with the Dirichlet boundary condition for an arbitrary region, based
on the singular perturbation approach to boundary problems.Comment: 9 page
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