Advanced power analyzer based on virtual instrumentation

To measure input and output power of frequency converter in the same is quite specific task, because the output voltage frequency varies and both input and output power has to be measured from the same time window and at the same time the integer multiply of signal cycles has to be processed. At the same time can be measured mechanical power from analog or frequency signals from torque and revolution sensors. The input current and output voltage contain many harmonic components and thus the sampling frequency has to be sufficiently high.