Getting wrong output when Modelling a VFD powered by a generator, feeding a motor

Hello Everyone, I am trying to model an VFD which is powered by an AC Generator, feeding an induction motor. I got a model online, where the guy takes a pure DC supply as the source. I modified his model, replacing it with AC Supply and a rectifier. The model works well with DC supply, however it gives wrong output when a AC Generator with a rectifier is connected.

Below is the model powered by a DC source, this works perfectly.

Below is the model with AC source, this gives wierd outputs.

This is the voltage produced by rectifier

This is the Voltage Produced by invertor

Below is the motor torque and rpm

I would really appreciate if someone can help me figure out what is wrong in my system, Thanks.

Answer 1

[Sabin]

Without a model we can only speculate. The issue may be the parameterization of the grid side components. Simscape Electrical provides a similar example using a controlled rectifier, this can be a good tsrating point in understanding this system.

https://www.mathworks.com/help/sps/ug/three-phase-asynchronous-drive-with-sensor-control.html