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| Format: | Artículo científico |
| Sprache: | en |
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Academia Brasileira de Ciências
2013
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| Online-Zugang: | https://www.redalyc.org/articulo.oa?id=32727844036 |
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- Mathematic model of three-phase induction machine connected to advanced inverter for traction system for electric trolley LIVIU S. BOCÎI VALENTIN MÜLLER Multidisciplinaria (Ciencias Naturales y Exactas) trolley bus Induction engine mathematic model operating characteristics This paper establishes a mathematical model of induction machine connected to a frequency inverter necessary to adjust the electric motor drive. The mathematical model based on the Park’s theory allows the analysis of the whole spectrum (electric car – frequency inverter) to drive the electric trolley bus made on ASTRA Bus Arad (Romania). To remove higher order harmonics, the PWM waveform of supply voltage is used, set in the general case. Operating characteristics of electric motor drive are set to sub-nominal frequency (f < 50 Hz) and for different angles of the control switching elements in the construction of the inverter. Tensions in the stator of the equivalent machine are determined by three components: the fundamental component; the second component corresponding to the higher order harmonics, which rotate in direct connection; and the appropriate third component of higher order harmonics, which are rotated in reverse. The mathematical model developed will help to determine the harmonics which have a negative infl uence on the performance of the electric engine and also determines the control angle of the switching elements to remove these harmonics, (Bele 2007). 2013 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32727844036 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.2 Vol.85