Спектральний аналіз на моделі в matlab вихідної напруги та струму трифазного регулятора з шіп під час роботи на активно-індуктивне навантаження

Authors

  • І. М. Голодний
  • О. В. Санченко

Abstract

SPECTRAL ANALYSIS VOLTAGE AND CURRENT OF THREE-PHASE REGULATOR OF PWM ON THE MATLAB MODEL WITH  RESISTIVE-INDUCTIVE LOAD

I. Golodnyi, A. Sanchenko

 

 

In previous papers shows that for low-power asynchronous electric adjustable at cost advantage with semiconductor voltage converters. The disadvantage of such devices is that they generate in a power voltage pulses and harmonics. Power quality depends on the method of controlling converters. To confirm this position in MatLab created models of single-phase and three-phase asynchronous electric adjustable  adjustable output voltage on the principle of pulse-width converter.

Aim of paper - to improve the quality of the output voltage harmonic composition of semiconductor converters controlled three-phase asynchronous electric drive.

Materials and research methods. Research phase semiconductor voltage converter with pulse width control conducted using the theory of electrical circuits sinusoidal and non-sinusoidal periodic current and computer modeling system MatLab.

Research results. To analyze the output voltage waveform created a computer model of the three-phase voltage converter with pulse width control. The power block model consists of a three-phase power supply Three-Phase Source, active-inductive load RL, three-phase diode bridge UniversalBridge, key transistor IGBT. Management transistor unit carried Pulse Generator, which is given switching frequency Fk and time of the on state of the transistor. To study the spectrum of a field model introduced block Powergui.

The study was carried out with a load R = 47.9 Ohms; L = 197×10-3 H and duration of the on state transistor-tion works for 80%.

As seen from the survey results as higher harmonic current and voltage generated multiple frequency switching: when fK = 500 Hz frequency higher harmonics matter fK/fN = 10, 20, 30, etc., while fK = 2000 Hz – fK/fN = 40, 80, etc., where fN – frequency network.

When switching (on/off) key transistor having reverse voltage pulses that depending on the switching frequency, such as fK = 2000 Hz, reaching in 9000 V.

 

Сonclusions

In the study of this converter is necessary to not only analyze the spectral composition of output voltage and current, but also consider the reverse pulse voltage switching transistor key.

References

Holodnyi, I. M., Sanchenko O. V. (2011). Do pytannya reguliuvannya shvydkosti malopotuzhnogo asynkhronnogo elektropryvoda. [Before issue of regulation of speed low-power asynchronous electric drive]. Naukovyi visnyk Natsionalnogo universytetu bioresursiv i pryrodokorystuvannya Ukrayiny166 (4), 64–70.

Holodnyi, I. M., Sanchenko, O. V. (2012). Porivnyalnyi analiz na modeli v MatLab garmonichnogo skladu vykhidnoi napruhy elektronnykh peretvoriuvachiv z riznymy sposobamy keruvannia pid chas roboty na aktyvne navantazhennya [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 energozabezpechennya ta energozberezhennya v APK Ukrayiny". – Kharkiv, 129, 74–78.

Holodnyi, I. M., Sanchenko, O. V. (2016). Kompiuterna model tryfaznogo regul'ovanogo asynkhronnogo elektropryvoda z shyrotno-impulsnym peretvoryuvachem [Computer model of a three-phase asynchronous electric drive rehulvanoho of shyrotnotno-pulse converter]. Scientific Bulletin of National University of Life and Environmental Sciences of Ukraine, 242, 97–100.

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Published

2017-03-15

Issue

No. 256 (2016)

Section

Статті

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