The results of the development of a mathematical model of a synchronous motor and a study of the influence of the degree of saturation of the magnetic circuit on the transient processes of direct start-up are presented. It is noted that the existing methods of research and calculation of transient processes of synchronous machines are based on the application of the superposition (superposition) method, which excludes their use in nonlinear systems.
Reviewed and analyzed issues associated with overvoltage in the free phase winding of the stator with asymmetric short-circuit implicitly pole synchronous generator biaxial excitation, and compared the results of experimental measurements of the phase currents in the study of a mathematical model of the synchronous generator biaxial excitation (MM SGBD) and physical model SGBD and the SG at steady-state single-phase short circuit.
In article are brought frequency regulation of the asynchronous electric motor and that reach to energy saving itself. Frequency management is energy saving so regulation of the frequency of the rotation of the asynchronous engine are provided increasing coefficient of efficiency and reduction of the loss to powers. Frequency management, asynchronous engine, economy to energy, load, loom, activate current, frequency of the rotation of the engine.
The overall dimensions of a synchronous generator with permanent magnets are determined by its main dimensions - the length lp and active part of the rotor with a diameter Dp , so the larger the air gap, the smaller the magnetic induction in it and vice versa. The force of gravity, in turn, will also depend on the air gap. The structurally incorporated unevenness of the air gap leads to an increase in the attractive force in the place of the smallest gap value, which leads to the appearance of a bending moment. As a result, the disc skews and the load on the bearings increases.
Recently due to the worldwide population grows much attention has been paid to increasing total electricity generation. However, traditional power plants, which are used hydrocarbon fuels, cause one of the challenging problems like environmental contamination and global warming in the world. In this case, renewable or alternative energy sources can be a promising replacement for traditional hydrocarbon fuels. Uzbekistan has lots of small rivers and water reservoirs and the use of these potentials in the perspective to generate power it is a unique decision of the problem. Usually in small power plants use low-speed generators and efficiency of these type generators are very low. Hence, the main objective of this study is to increase the efficiency of the low power generator by improving and optimizing the specifications and parameters of the low power generators. The use of low-speed generators with permanent magnet excitation for micro-hydroelectric power plants and wind turbines is relevant in terms of providing good weight and size indicators, simplicity of construction, lack of sliding contacts, with the ability to perform a generator of low rotation speeds, which causes low cost and high reliability. In this study, the natures of the influence of the main geometric dimensions of the mass-dimensional parameters and the air gap on the energy indicators of the generator are estimated. Theoretical and experimental research results are submitted.
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