Appendix A: Compatible frequencies with Δt
The timestep Δt is said to be compatible with a signal if it fits the signal's period an integer-number of times. The compatibility ensures PWM carrier frequencies (assumed constant) are sampled exactly at their peaks and zero-crossings, which avoids aliasing. This exact (compatible) fit avoids the 2nd-harmonic problem in RMS measurements. It is also assumed that the signal frequency (60 Hz) is constant.
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Appendix A: Compatible frequencies with Δt, Page 1 of 2
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