Real=time calculation of pulse pattern for three=phase inverters - has three binary switching signals calculated for each modulation cycle from set points for phase-to-phase voltages

摘要

A procedure for real-time calculation of the pulse pattern for three-phase inverters where the switching state is determined by three binary signals which are calculated for each modulation cycle from set points for the voltages between the phase terminals. For each of the three signals which should come into effect for the next modulation cycle, the following parameters are calculated separately:- the value of the signal at the beginning of the cycle, the value at the end of the cycle, the switching time between the beginning and end of the cycle. The set points for the phase-to-phase voltages and the mean direct voltage at the terminals are normalised to half this direct voltage.