Simulation of dynamic processes in electromagnetic energy converters for force effects and low-frequency vibrations generation systems
Mechanical source effect on the ground is a seismic wave generation technology widely used in minerals seismic exploration. Force effect and low-frequency vibration generation systems are advantageous because of electromagnet-based electromechanical energy converters. The improvement of such convert...
| Main Authors: | , |
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| Format: | Article |
| Language: | Russian |
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Tomsk Polytechnic University
2019-05-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya.tpu.ru/archive/article/view/1568 |
| Summary: | Mechanical source effect on the ground is a seismic wave generation technology widely used in minerals seismic exploration. Force effect and low-frequency vibration generation systems are advantageous because of electromagnet-based electromechanical energy converters. The improvement of such converters design methods is an actual problem. This concerns especially the issues of considering the influence of steel elements saturation in magnetic core construction and losses of active power caused by eddy currents. The aim of the research is to design the electromagnetic converter dynamic model and to develop stable design algorithms with structure modeling methods in Matlab Simulink which are capable of analyzing non-stationary electromagnetic processes with respect to steel elements saturation and eddy-current losses. Research methods. Electromagnetic processes have been simulated in Matlab 7/12/0 (R2011a) Simulink. Results. The paper introduces the mathematical description of power losses with respect to equality of losses in magnetic core ferromagnetic elements and in the short-circuit contour when current is sinusoidal. The losses influence is approximately taken into account as an additional short-circuit contour linked with the main magnetic flux generated by the magnetizing winding of the inductor. The design model consists of electrical and magnetic balance differential equations derived for a non-linear equivalent circuit of the inductor. This model permits to take into account eddy currents in the solid magnetic core and leakage fluxes. The proposed design algorithms and circuit implementation of dynamical models of a non-linear inductor obtained by structured simulation can be accepted as the base of the design of dynamical operation processes in power electromagnetic vibroimpact drives to improve their characteristics. The results of calculations with the algorithms stated in the paper completely agree with classical statements of the non-linear electrical circuit theory and physical experiments results. Some examples of calculations approving structured simulation results coincide qualitatively with physical experiment results. There are several recommendations for choosing electromagnetic converter structured model parameters providing design algorithms stability. |
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| ISSN: | 2500-1019 2413-1830 |