How to Develop DC-DC Converter Control in Simulink

Learn how to model and simulate a DC-DC converter in Simulink® and Simscape Electrical™. Get a demonstration of SEPIC circuit topology and how to model and simulate a DC-DC converter that powers a strip of LEDs. MathWorks engineers show how to use Simulink and Simscape Electrical to develop, simulate, and implement a controller that maintains desired output voltage in the presence of input voltage variations and load changes to achieve a fast and stable response. See how to use control algorithms to generate embedded code optimized for implementing on a Texas Instruments™ C2000™ microcontroller. Also explore hardware-in-the-loop (HIL) testing of the microcontroller using a Speedgoat® real-time target machine.

Highlights:

  • Modeling and simulating passive circuit elements, power semiconductors, and varying power sources and loads
  • Simulating the converter in continuous and discontinuous conduction modes
  • Determining power losses and efficiency of the converter
  • Tuning the controller to meet rise time, overshoot, and settling time
  • Generating C code from the controller model for implementation on a Texas Instruments C2000 microcontroller
  • Using a Simscape Electrical model deployed to an FPGA implemented in a Speedgoat real-time target machine for HIL testing

Part 1: Introduction and Demo Get a quick introduction to the topic of DC-DC converter controls, including a customer reference story and demonstration of the entire system working as desired.

Part 2: Converter Modeling and Efficiency Considerations Learn how to model a DC-DC converter in Simscape and use simulation results to generate efficiency maps for the diode and the power switch.

Part 3: Power Losses Investigation Learn how to use Simscape Electrical functions to generate maps of heat losses to embed in a dedicated model for fast simulations of thermal behavior and sizing of cooling systems.

Part 4: Voltage Control Design Learn how to design and tune a digital PID controller for a DC-DC converter. Using System Identification Toolbox, engineers can simplify the tuning of any power electronics converter without needing to average converter equations.

Part 5: Supervisory Logic Design and Testing Learn how to use Stateflow to design supervisory logic state machines that manage your converter desired operating mode.

Part 6: Automatic Code Generation and Conclusions Learn how to automatically generate C code from your model and use the TI C2000 Hardware Support Package to build, compile and run the application on target hardware.

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