Аnalysis of operating modes of singlephase currentsource rectifier with rectangularstepped pulsewidth modulation
| Autor: | Оleksandr Petrenko, Borys Liubarskyi, Alexey Krasnov, Vladimir Bozhko, Ramil Nuriiev, Oksana Dubinina |
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| Rok vydání: | 2018 |
| Předmět: |
active current-source rectifier
0211 other engineering and technologies Energy Engineering and Power Technology 02 engineering and technology Power factor DC motor Industrial and Manufacturing Engineering law.invention Traction motor pulse-width modulation Rectifier law Management of Technology and Innovation Electric locomotive lcsh:Technology (General) 021105 building & construction 0202 electrical engineering electronic engineering information engineering lcsh:Industry Electrical and Electronic Engineering Physics business.industry Applied Mathematics Mechanical Engineering 020208 electrical & electronic engineering Electrical engineering Thyristor power factor Computer Science Applications Control and Systems Engineering lcsh:T1-995 lcsh:HD2321-4730.9 Alternating current business mathematical model Pulse-width modulation |
| Zdroj: | Eastern-European Journal of Enterprise Technologies, Vol 3, Iss 9 (93), Pp 50-57 (2018) |
| ISSN: | 1729-4061 1729-3774 |
| DOI: | 10.15587/1729-4061.2018.131150 |
| Popis: | The operating modes of the single-phase active current-source rectifier in the case of rectangular-stepped pulse-width modulation and load in the form of DC traction motor are investigated. The single-phase bridge rectifier circuit with a discharge diode is considered. The mathematical model of the rectifier is developed and the main ratios for pulse-width modulation with rectangular-stepped modulating signal are determined. On the computer model, electromagnetic processes at three modulation frequencies (900, 1,200, 1,800 Hz) are studied. The features of the effect of the modulation depth and frequency on the rectifier power factor and the total harmonic voltage and current distortion in the mains supply are determined. The DC motor for today remains the main type of the traction motor of the 25 kV, 50 Hz AC mainline electric locomotives of alternating current in Ukraine and in some other countries. To power such motors, diode or thyristor rectifiers are used. At the same time, it is known that converters on fully controlled semiconductor devices provide higher power efficiency. The studies allow determining what values of modulation frequency and depth provide a high power factor (more than 0.9) and minimum total harmonic voltage and current distortion distortions in the mains supply. This allows finding rational approaches to the selection of power circuits and control algorithms for active converters in the traction electric drive of electric locomotives. The efficiency of increasing the power factor and reducing the total harmonic voltage and current distortion can be achieved, first of all, by reducing the power consumption for traction of trains. According to the set of selected comparison criteria, the active current-source rectifier with a modulation frequency of 1,200 Hz is the most suitable for implementation in the traction electric drive of the electric locomotive. Provision of high power characteristics in a wide range of traction loads can be achieved in the multi-zone circuit of such a converter. |
| Databáze: | OpenAIRE |
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