Method of measuring an analog signal generated by a frequency inverter

摘要

The method involves sampling the analog signal for generating a sequence of, particularly time- and amplitude-discrete, digitized sampled value. The sampled value is generated exactly per period of the pulse width modulation. A signal mean value of the analog signal is formed over the period in digital representation. A current measured value is calculated on the basis of an equation. The analog signal is sampled for generating multiple digitized interstitial sampled values for the previous period.