PLECS code generator_TMDSCNCD28379D

Question

Hello,

I am currently working on implementing a an inverter using PLECS(Controller : TMDSCNCD28379D). In the system, current measurement is performed using sigma-delta modulator.

1. Grid Output Current Measurement:

   • Sensor: Shunt resistor
   • Modulator: AMC1306M05 reinforced modulator (±50mV input range)
   • MCU: TMDSCNCD28379D
   • Shunt resistor value: 0.002Ω (providing ±50mV output signal at approximately ±25A output, generating 0.5W of heat at full load)
   • The voltage across the shunt resistor is fed into the AMC1306M05 sigma-delta modulator, generating a sigma-delta stream
   • The modulator clock is generated from the eCAP peripheral on the C2000 MCU, and the AMC1306M05 data is read using the built-in SDFM demodulator

2. Questions:

   • How can I implement this setup in PLECS?
   • Are there specific guidelines or examples for modeling the AMC1306M05 modulator and the SDFM demodulator function of the TMDSCNCD28379D in PLECS?
   • Could you explain how to generate and process the sigma-delta modulated signal in PLECS?

Answer 1

The SDFM peripheral is currently not supported in the TI C2000 Target Support Package, and so the application as described above is not possible in the current TSP 1.7 release.