| Abstract [eng] |
Frequently the traditional rotating electrical machines are used to drive various linear oscillating mechanisms. The well developed design and gear mechanisms, good energy factors and well developed control system has influenced the wade popularity and usage of such rotating machines in industry and home appliance. But the usage of oscillating electrical motors is more effective for driving the linear oscillating mechanisms. The oscillating electrical machines are more frequently used in piston compressors, pumps of various fluids, saws, electrical valves and other mechanisms. This increase of use is caused by better power/mass ratio, gearless drive possibility, better total efficiency of the drive comparing with the traditional electrical machines. Nowadays the most investigated areas especially by foreign scientists are analysis and design of excited oscillating synchronous electrical machines with NdFeB magnet excitation system. The excited machines in comparison to non-excited ones has smaller dimensions, higher efficiency and power factor, but are more expensive due to the usage of magnets. It is relevant to investigate the influence of design parameters of linear oscillating synchronous excited electrical motor to motor indicators. There was an investigation based on variation of magnetic materials and analyzing the influence of the changes to motor indicators. In this final master thesis the linear oscillating synchronous excited electric motor was investigated. The outer magnetic core of the motor is \"C-core\" type with the single phase AC winding. For better design of the motor the magnets distributed by Halbach array were used in moving part of the motor. The modeling of the motors magnetic circuit was done by using the finite element method in two stages. In the first stage the magnetic material of the core an magnets were changed. In the second stage the air gap was varied. During the modeling the change of the motor parameters (indicators) was established. |
