Hello:
I met the problem that building NPC-based DAB in RTBox, when using PWM(Variable) block to create pulse signals for the secondary side of the transformer, the first phase won’t be zero, however, it seems to default as zero by observing the scopes, if there’s any ways to break the limitations otherwise the secondary NPC full-bridge won’t output symmetrical five-level voltage waveform.
Best regards,
RTBox.plecs (280.9 KB)
Hello, you either need to use a single PWM block with 8x inputs or explicitly synchronize the two PWM blocks. Please see the relevant documentation excerpt below, including a description of how the first channel’s delay is relevant only when externally synchronized.
You need to enable the Synchronization output of one block (set in the Sync tab) and enable the Synchronization input of the second block (also set in the Sync tab). Then you must connect the synchronization chain as shown in the figure below the documentation excerpt.
