List of Figures

• Figure 1: Inverter Mode

• Figure 2: Rectifier Mode

• Figure 3: Three-Phase Three-Level NPC Converter

• Figure 4: First Arm of the NPC Converter

• Figure 5: PWM Generation for the First Arm of the NPC Converter

• Figure 6: Voltages V_AO, V_AN and V_AB

• Figure 7: Load and Filter in Inverter Mode

• Figure 8: Load and Filter in Rectifier Mode

• Figure 9: Measurements

• Figure 10: Start-Up Panel - Inverter Mode Scenario

• Figure 11: Second Panel - LC Filter Scenario

• Figure 12: Third Panel - Rectifier Mode Scenario

• Figure 13: Changing DC Voltage Source

• Figure 14: Changing AC-source Frequency

• Figure 15: Synchronize Button Activated 

• Figure 16: Changing AC-source Phase Shift; Load More Inductive

• Figure 17: Changing AC-source Phase Shift; Load More Capacitive

• Figure 18: Changing PWM Frequency

• Figure 19: Changing AC-source Amplitude to 75 V 

• Figure 20: Changing AC-source Amplitude to 82 V

• Figure 21: Changing AC-source Phase Shift; Load More Inductive

• Figure 22: Changing AC-source Phase Shift; Load More Capacitive

• Figure 23: Rectifier Mode; LC Filter ON

• Figure 24: Rectifier Mode; LC Filter ON & DC Load Connected

List of Tables

• Table 1: Voltage Levels at the Inverter Output

• Table 2: Converter Parameters and Nameplate Ratings

• Table 3: Control Parameters

• Table 4: Control Buttons and LED fuse status indicators

• Table 5: Content of Scopes and Displayed Waveforms

• Table 6: Content of Displays

• Table 7: Power Dissipated in LC Filter and Converter Bridge

• Table 8: Voltage Outputs and Associated Control Switches

• Table 9: Output Voltage Levels

• Table 10: Changing PWM Frequency with LC Filter ON

• Table 11: Changing PWM Frequency with LC Filter OFF