OPTIMIZATION OF PARAMETERS OF LOW-POWER ELECTRIC GENERATORS FOR WIND POWER PLANTS
Authors:   Bashkir State Agrarian University, Gorbunov Anton S. , Karimov Ruslan D. ,   Ufa University of Science and Technology, Roginskaya Lyubov E. ,   Ufa University of Science and Technology, Bakirov Ayaz A. ,   Ufa University of Science and Technology, Khakimyanov Marat I. ,   fa State Petroleum Technological University
Published: January 2025

Relevance Wind power, as one of the leading sources of renewable energy, requires the development of efficient and reliable electric generators to increase the productivity of wind power plants. Modern environmental and economic requirements stimulate the transition to generators with permanent magnets, which are characterized by high efficiency and lower operating costs. However, the issues of optimization of design parameters, such as the number of poles, rotation speed and geometry of the magnetic system, remain key in the design of highly efficient generators for wind power plants. Aim of research The main aim of the work is the development and study of 2 kW electric generators for wind power plants with an emphasis on the optimization of their design parameters. The task is to increase the efficiency of generators, reduce torque ripples, vibrations and improve the thermal state of the machines. Objects of study The objects of study are synchronous generators with permanent magnets with a capacity of 2 kW, intended for use in wind power plants. Various options for generator designs with a change in the number of poles, slot bevel, change in the type of magnetic system and rotation speed are considered. Research methods The study involved computer simulation methods using the Ansys software package for electromagnetic and thermal analysis. Calculations were made of losses, efficiency, and thermal state of the active elements of the generators at different rotor speeds. Results The study considered several variants of 2 kW electric generators at 300 and 600 rpm with different design features, such as the number of poles, magnet shape, stator slot bevel, and other parameters. The main results include: – optimization of the number of poles: increasing the number of poles from 12 to 18 made it possible to significantly reduce torque ripples on the shaft, which improves the stability of the generator and reduces its vibrations. This also led to a decrease in the required thickness of the magnetic circuit, which made it possible to reduce the active mass of the generator without deteriorating its performance; – magnetic systems of generators: variants with semicircular radially magnetized magnets and diametrically magnetized magnets showed similar results in terms of generator efficiency, but such designs are more complex to manufacture. When modeling at a rotation speed of 600 rpm, a significant decrease in the generator mass was observed while maintaining or even improving its performance characteristics. The generator mass was reduced more than twofold, which reduces the loads on the structural elements of the wind turbine. An improvement in the thermal state of the machine was also revealed due to a decrease in the active length and more efficient cooling of the open rotor structure.