ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
The paper considers some problems of calculating spectral characteristics of magneticfield of the linear induction motor (LIM), operating at the electrical braking modes. In automaticdrives with LIM the electric braking modes are usually applied: dynamic, recuperation, single –phase, capacitor type, braking by means of opposite connection, by pulsating current and invertertype (frequency) braking. During the process of braking in the moving part of the LIM and in somecases in an inductor there are initiated complicated interrelated electromagnetic andelectromechanical non – stationary processes.The braking processes have been analysed in the motionless right – sided Descartes system ofcoordinates x, y, z. There have been presented the expressions of volumetric density of brakingcurrent which have been regarded the non – periodic functions of coordinate x. Besides that incases of single – phase and capacitor braking these expressions are also regarded as the non –periodic functions of time. Therefore when compiling the mathematical model there have beenapplied Laplace and Fourier integral transformations. After having applied Fourier transformationthere have been received the expressions of the spectra amplitudes of primary magnetic field at thedynamic braking under the condition that the number of excited zones in the inductor is even,uneven and fractional. The continuous spectra of amplitudes have been calculated by the softwareMathcad 2001 Profesional
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.144.136.pdf
Permalink
