4 Sed2 Harmonics Overview

Variable Frequency Drives Harmonics Overview

Harmonics Overview ,[object Object],[object Object],[object Object]

Harmonics Overview ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],Harmonics Overview Repeated 60 times every second 166 msec 1 cycle 0

[object Object],[object Object],Harmonics Overview Fundamental = 60Hz 5th Harmonic = 300Hz

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Harmonics Overview

[object Object],Harmonics Overview Repeated 300 times every second 30 msec 1 cycle 0

Harmonics Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Poor Power. . . ,[object Object],[object Object],Harmonics Overview

Harmonics – DC Capacitance Link ,[object Object],[object Object],V Rectifier D C Link Inverter Single or Three Phase Power C + - Current C

Harmonic - Current Wave Form Ideal current wave but not attainable with a 6-pulse drive What the current wave form looks like with a 6-pulse drive Approaching a perfect current wave

Typical Drive Input Current Waveform I RMS = 75A Power = 12kW (x3) If current is sinusoidal Only 52A is required for the Same power. MM4 45kW Line Current Waveform (low impedance mains)

SED2 Typical Waveform I RMS = 53A Power = 12kW (x3) If current is sinusoidal Only 52A is required for the same power. SED2 11kW Line Current Waveform

DC Link Design Results 15HP Typical VFD Line Current Harmonics Spectrum 15 HP SED2 Line Current Harmonics Spectrum Meter deflection

Harmonics Competitive Analysis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Harmonics - The SED2 Advantage ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Siemens SED2 VFD Advantages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],For more info on Harmonics, see the Harmonics menu on this CD

4 Sed2 Harmonics Overview

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4 Sed2 Harmonics Overview