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Three-Phase Inverters: Harmonic Analysis and Voltage Control of SPWM Inverters, Slides of Power Electronics

Information on three-phase inverters, focusing on their harmonic analysis and voltage control in spwm inverters. It includes diagrams of pwm inverters, voltage control schemes, and simulation using simulink. The document also covers the behavior of freewheeling diodes and provides diagrams of phase and line voltages.

Typology: Slides

2011/2012

Uploaded on 07/22/2012

shantanu_85
shantanu_85 🇮🇳

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Download Three-Phase Inverters: Harmonic Analysis and Voltage Control of SPWM Inverters and more Slides Power Electronics in PDF only on Docsity! Three-Phase Inverters Harmonic Analysis (1) RMS Values of Harmonics: Equation 10.14 - 10.16 11 °#13 #15 17 #19 21 > 4V, ‘ nt aint alae 70 Vea = —Jcos —Isin n(wt — — “ n=1,3,5, aqv 6 6 We can notice that the triplen harmonics (n = 3, 9, 15, . . .) would be zero in in the line-to-line voltages. docsity.com Three-Phase Inverters Harmonic Analysis (2) Vab = 5 £Y cos ™ sin n( we + ab n=13,5.... NT 6 6 4V, 30° The rms value of fundamental component V,, = ae = 0.7797V, v, V2¥, The rms value of line-to-neutral voltages >= Vi a a 0.4714V, The line-to-line rms voltage can be found from 2 t" ; v2 2 V, = E , 3 aw | = 4/5 Vs = 0.8165V, docsity.com PWM: Control Signals Q1: ON Q4: OFF Q1: OFF Q4: ON Simulink docsity.com SPWM : Simulation using SIMULINK® Va_yiva [va 2 > eisignal2 Ph-a Va comp-a signal » 5 fe > —— signal2 Ph-b Vb Comp-b 4>jsignal1 s += isignal2 Ve_y/C Ve Comp-c signal3 Ph-c joooo °° Ma a Vii | _» {CJ Vab Vab signal |__|] Vbc Vbe signal »( I \Vca Vea Vea Sinusoidal Three-Phase PWM docsity.com SPWM : Gate drive signals, Phase and line voltages Phase Voltages Line Voltages docsity.com
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