Hi Geraud,
To set up a Power Amplifier (PA) model in Simulink for Power Hardware in the Loop (PHIL) simulations, it is essential to accurately represent the amplifier's dynamics and integrate it with the hardware setup. Here is a streamlined approach:
PA Modeling Approach:
- Simplified Linear Model: Ideal for cases where the amplifier functions in its linear range. This model concentrates on signal dynamics and does not account for distortions.
- Nonlinear Model: Designed to capture the amplifier's nonlinear characteristics, efficiency, and distortions. This involves a more complex approach, incorporating polynomial equations, look-up tables, or behavioural models for accuracy.
Implementing in Simulink:
- Explore “Simscape Electrical” for components that can be adapted for PA modelling. If a direct match is not found, controlled voltage and current sources can serve as foundational elements.
- For detailed nonlinear models, Lookup Table blocks can accurately represent input-output characteristics.
Setting Up PHIL Simulation
- Interface the model with real-world hardware using “Data Acquisition Toolbox” or “Simulink Real-Time”, ensuring simulation interact with physical components in real-time.
- Optimize model for real-time operation, employing fixed-step solvers and simplifying complex models where necessary.
- Incorporate safety and protection logic to prevent hardware damage, including output signal limits and condition monitoring.
Testing and Validation
- Conduct testing of model in simulation before hardware integration, using scopes and data logging for performance analysis.
- Begin hardware tests with low power, gradually increasing complexity while monitoring system responses to ensure safety.
This approach ensures the power amplifier is accurately modelled and integrated into PHIL simulations, balancing detailed representation with real-time performance and safety considerations.
Please refer to the following documentation links –
- Simscape Electrical- https://www.mathworks.com/help/sps/index.html?searchHighlight=simscape%20electrical&s_tid=srchtitle_support_results_1_simscape%20electrical
- Data Acquisition Toolbox- https://www.mathworks.com/help/daq/index.html?searchHighlight=data%20acquisition%20toolbox&s_tid=srchtitle_support_results_1_data%20acquisition%20toolbox
- Simulink Real Time- https://www.mathworks.com/help/slrealtime/index.html?searchHighlight=Simulink%20real%20time&s_tid=srchtitle_support_results_1_Simulink%20real%20time
Hope it helps!
Best Regards,
Simar
