EN / ACS800-31/U31 Hardware Manual - Simark Controls
EN / ACS800-31/U31 Hardware Manual - Simark Controls
EN / ACS800-31/U31 Hardware Manual - Simark Controls
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26AC voltage and current waveformsThe AC line current of the drive is sinusoidal with power factor equal to 1. The IGBTsupply unit does not generate characteristic current or voltage overtones like atraditional 6- or 12-pulse bridge does.The Total Harmonic Distortion (THD) in current is given in chapter Technical data /Input power connection. The THD in voltage depends slightly on the Short CircuitRatio in the Point of Common Coupling (PCC). The high frequency switching andhigh du/dt slightly distort the voltage waveform at the input of the converter.Typical line current (i) and voltage (u) waveforms are shown below.u (V)i (A)t (ms)t (ms)Example spectra of the current and voltage distortion at the output of the transformerare shown below. Each harmonic is presented as compared to fundamental voltage(reference value = 1). n denotes the ordinal number of the harmonic.Test 13Phase current (A) Line-to-line voltage (%)Test 1<strong>31</strong>.61.61.41.41.21.21.01.00.8IL1 [A]0.8UL12 [%]25811141720232629323538414447500.0n0.02581114172023262932353841444750n0.60.60.40.40.20.2The <strong>ACS800</strong>-<strong>31</strong>/U<strong>31</strong>
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