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Output of Clarke Transform Stationary Frame is Double the Input

Question asked by Derek Cook on Aug 3, 2018
Latest reply on Aug 7, 2018 by Adam Reynolds



It looks like the amplitude of the Alpha frame of the Clarke Transform is double the instantaneous phase current A. Any idea why this would be?


Below I have plotted the Isa from the Feedback Output, and the Alpha from the Clarke output scaled from -1 to 1. The update rate of my trender is 20ms, so the sinusoidal wave is a bit choppy since this is occurring at 250us.


The green wave is the Alpha stationary frame, the blue wave is the Isa feedback output. The amplitude of the green wave (Alpha) is -0.4 to 0.4 normalized, and the blue(Isa)  is -0.2 to 0.2 normalized.