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Requirements

RT-LAB, the SimPowerSystems Simulink Toolbox, and the eHS Power Electronics Toolbox must be installed in order to successfully run this example project.

Setup Parameters

The following parameters used for real-time simulation are editable by the user in the model

• Ts: CPU Simulation time step - the default is 20µs.

• Vdc_Source: Voltage input of the NPC circuit

• BEMF_Amp PP: Amplitude of the Back-EMF

• Ref_Freq: Frequency of the Back-EMF

• PWM_Freq: Carrier frequency of the NPC PWM generator

• PWM_Modulator: Duty cycle of the NPC PWM generator

Real-Time model

The RT model is composed of the following two main subsystems: the Console (SC) and the Master (SM).

• The console subsystem, which runs on the host computer, manages the communication between the host computer and the target simulator. It is used as a user interface during the real time simulation to control the model and visualize the outputs of the eHS solver.

• The master subsystem, which runs in real time on the target simulator, manages the communication between the CPU model and the eHS solver running on the FPGA. For example, gates and sources parameters sent from the console are processed in the PWM Generator and Back-EMF Generator subsystems and subsequently sent to the eHS solver.

Running the model

In order to run the example, follow the procedure below:

1. If eFPGASIM is installed, add the example project to RT-LAB by selecting File>>New>>RT-LAB Project>>eFPGASIM>Schematic_Editor_Workflow>>eHS Gen 4>>NPC_Inverter.

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2. Compile the RT Model by clicking on Build in RT-LAB.

3. Once the model has been successfully built, Load and Execute the model in RT-LAB in order to begin the real-time simulation.

4. Once the real-time model and the eHS are running, observe the results of the eHS simulation by opening the measurements subsystem in the Simulink Console and double click on any of the scopes.