No abstract

The issue of developing technologies using alternative renewable energy sources today is a very urgent task both around the world and in Russia, which is explained by economic, technological, and, most importantly, environmental factors. The climatic and geo-graphical features of our country create all the necessary conditions for the use of such areas as solar energy, small hydro energy, wind energy, etc. But the most promising in terms of energy potential is wind energy, as many regions of our country are located in areas with high average wind speeds. However, there are a number of problems that impede the development of wind energy in Russia, the most important of which is the almost complete absence of wind generators designed and manufactured in our country that could compete with foreign models. The product proposed in the article is an attempt to solve this problem through the use of a new design of a wind wheel and an electric generator, as well as the use of magnetic suspensions.

In this paper high-speed electric motors are considered, allowing one to obtain the necessary weight and dimensions for modern equipment. The creation of high-speed machines is directly related to the study of factors limiting their range of rotational speeds with the choice of electrical steel with lower specific losses and sheets of smaller thickness and modeling the magnetic field in the magnetic system of the machine.

This article considers small-size electric machines used in various fields of technology, from medical electrical equipment to complex mechatronic systems as part of spacecraft. To obtain satisfactory weight and size parameters of electric machines, it is necessary to take into account many factors that limit the possibility of reduction the machine size. The high energy of modern permanent magnets (250 - 300 kJ/m3) makes it possible to obtain the best weight and dimensons indicators in the designs of brushless direct current machines with excitation from permanent magnets, taking into account the influence of thermal processes.

The article discusses promising designs of high-speed electric motors for autonomous medical instruments. These machines ensure the creation of an autonomous electromechanical tool with low energy consumption, which predetermines the possibility of its use in field conditions. On the other hand, higher ergonomic indicators contribute to better performance of operations.