Spectral analysis of the supply current of the rl load with a voltage regulator based on a pulse-line converter
DOI:
https://doi.org/10.31548/energiya2021.04.146Abstract
Pulse-width voltage regulators are gaining increasing use in industry, especially in variable speed drives. At the same time, little research has been done in the field of electromagnetic compatibility (spectral composition of current consumption).
The aim of the study is to determine, using computer simulation, the nonsinusoidality of the current consumption with an RL-load from a voltage regulator based on a pulse-width conversion.
The study of the spectral composition of the supply current of an active-inductive load with a pulse-width voltage regulator was carried out using the provisions of the theory of electrical circuits of sinusoidal and non-sinusoidal periodic current using computer simulation.
To analyze the spectral composition of the supply current of the RL-load with the selected voltage regulator, a simulation computer model was created, which consisted of a three-phase power supply and an RL-load, a rectifier with a transistor switch. The regulation of the applied voltage to the consumer was carried out according to the principle of a pulse-width voltage converter.
As a result of studying a model of a regulated power supply based on a pulse-width converter and working on an active-inductive load, it was found that even with an initial voltage of the fundamental harmonic regulator of 34 V, the nonsinusoidality of the consumption current is 0.19%, which corresponds to the quality standard for electricity.
It is advisable to use this regulator for a controlled electric drive of ventilation systems with an increased slip motor, for example, in "Climate-4M" units.
Key words: semiconductor voltage converter, pulse-width converter, higher harmonics, RL-load
References
Holodnyi, I.M., Sanchenko, O.V. (2012) Porivnialnyi analiz na modeli v MatLab harmonichnoho skladu vykhidnoi napruhy elektronnykh peretvoriuvachiv z riznymy sposobamy keruvannia pry roboti na aktyvne navantazhennia [Comparative analysis model in MatLab harmonic of output voltage electronic transformers of different ways to manage when working on active load]. Visnyk Kharkivskoho tekhnichnoho universytetu im. P.Vasylenka. Tekhnichni nauky. "Problemy enerhozabezpechennia ta enerhozberezhennia v APK Ukrainy". Kharkiv, 129, 74-78.
German-Galkin, S. G. (2002). Power Electronics: Laboratory work on the PC: [Sylova elektronika: laboratorni roboty na PK]. St. Petersburg: CROWN print, 304.
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