Design and modeling of dynamic modes of low speed electric generators for electric power generation from renewable energy sources

Abstract

This article provides information on the current state and prospects for the development of renewable energy sources in the world and in our country, as well as on the choice of efficient power generators to ensure stable operation at low flows of micro hydroelectric and wind power plants. When designing a simulation model and a theoretical study of the dynamic modes of an electric generator, Solidworks and Matlab/Simulink software were used. Mathematical expressions are given for the output parameters of an electric generator (voltage, current, frequency, electromagnetic power, etc.) depending on its geometric dimensions, the number of permanent magnes, the connection diagram and the number of turns of the stator winding, the minimum distance between the stator and the rotor. According to the results of scientific research, an electric generator was developed with a power of 600 W, with the number of permanent magnets 32, the number of windings in each phase of the stator 4, the number of turns in each winding 200, the stator and rotor of which rotate in opposite directions. It was found that with opposite rotation of the stator and rotor relative to each other, the electromagnetic torque and electromagnetic power of the generator increase by 20% compared to a rotating rotor and a stationary stator of an electric generator. It is scientifically substantiated that by using this type of electric generator in micro hydroelectric power plants and wind power plants, it is possible to significantly increase the efficiency of installations at low currents.