Digital Control
Digital Control
Digital Control
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VAL1 ($0100)<br />
VAL5<br />
VAL3<br />
($0000)<br />
VAL4<br />
VAL2<br />
INIT ($FF00)<br />
CH0 a<br />
CH0 b<br />
In this example, both PWMs have the same duty-cycle.<br />
However, the edges are shifted relative to each other by<br />
simply biasing the compare values of one waveform<br />
relative to the other.<br />
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Phase Shifted PWMs<br />
Alternatively, if the waveforms are<br />
generated by different sub-modules, the<br />
waveforms can be shifted by simply<br />
changing the Init value of one sub-module<br />
relative to the other.<br />
This is useful for reconstructing phase currents from a DC bus shunt<br />
when the amplitudes of the modulated signals are near zero.<br />
TM
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