Hello everyone,
I am using a TI C2000 controller together with an RT Box in external mode. The PWM signals generated by the controller are sent through the following path:
single_phase_pv_inverter_PI_c2000_2.plecs (237.2 KB)
PWM output → PWM Capture → Switch → Demux → S1 ~ S4
The inverter is configured as a full-bridge (H-bridge). However, shoot-through occurs only when the Switch block is included in the signal path.
From the gate signals, everything appears to be correct:
- S1 and S2 are complementary
- S2 = NOT S1
- S3 and S4 are complementary
- S4 = NOT S3
When I observe S1 to S4 individually, the waveforms appear correct and I do not see any obvious wiring issue.
However, once the Switch block is connected, shoot-through occurs in the full-bridge. If I remove the Switch block, the problem disappears.
This issue only occurs in external mode using RT Box and TI C2000.
Is there a recommended way to safely switch between gate signal paths in a full-bridge inverter without causing shoot-through in external mode?
Thank you.